import { type MoveCounter, type TeamData } from '../gen9/teams';
import RandomGen7Teams, { type BattleFactorySpecies, ZeroAttackHPIVs } from '../gen7/teams';
import { type PRNG, type PRNGSeed } from '../../../sim/prng';
import { toID } from '../../../sim/dex';

// Moves that restore HP:
const RECOVERY_MOVES = [
	'healorder', 'milkdrink', 'moonlight', 'morningsun', 'recover', 'recycle', 'roost', 'slackoff', 'softboiled', 'synthesis',
];
// Moves that boost Attack:
const PHYSICAL_SETUP = [
	'bellydrum', 'bulkup', 'coil', 'curse', 'dragondance', 'honeclaws', 'howl', 'meditate', 'poweruppunch', 'screech', 'swordsdance',
];
// Moves which boost Special Attack:
const SPECIAL_SETUP = [
	'calmmind', 'chargebeam', 'geomancy', 'nastyplot', 'quiverdance', 'tailglow',
];
// Some moves that only boost Speed:
const SPEED_SETUP = [
	'agility', 'autotomize', 'flamecharge', 'rockpolish',
];
// Conglomerate for ease of access
const SETUP = [
	'acidarmor', 'agility', 'autotomize', 'bellydrum', 'bulkup', 'calmmind', 'coil', 'curse', 'dragondance', 'flamecharge',
	'focusenergy', 'geomancy', 'growth', 'honeclaws', 'howl', 'irondefense', 'meditate', 'nastyplot', 'poweruppunch',
	'quiverdance', 'raindance', 'rockpolish', 'shellsmash', 'shiftgear', 'swordsdance', 'tailglow', 'workup',
];
// Moves that shouldn't be the only STAB moves:
const NO_STAB = [
	'aquajet', 'bulletpunch', 'clearsmog', 'dragontail', 'eruption', 'explosion', 'fakeout', 'flamecharge',
	'futuresight', 'iceshard', 'icywind', 'incinerate', 'infestation', 'machpunch', 'nuzzle', 'pluck', 'poweruppunch',
	'pursuit', 'quickattack', 'rapidspin', 'reversal', 'selfdestruct', 'shadowsneak', 'skyattack', 'skydrop', 'snarl',
	'suckerpunch', 'uturn', 'watershuriken', 'vacuumwave', 'voltswitch', 'waterspout',
];
// Hazard-setting moves
const HAZARDS = [
	'spikes', 'stealthrock', 'stickyweb', 'toxicspikes',
];
// Protect and its variants
const PROTECT_MOVES = [
	'kingsshield', 'protect', 'spikyshield',
];
// Moves that switch the user out
const PIVOT_MOVES = [
	'partingshot', 'uturn', 'voltswitch',
];

// Moves that should be paired together when possible
const MOVE_PAIRS = [
	['lightscreen', 'reflect'],
	['sleeptalk', 'rest'],
	['protect', 'wish'],
	['spikyshield', 'wish'],
	['leechseed', 'substitute'],
	['perishsong', 'protect'],
	['solarbeam', 'sunnyday'],
];

/** Pokemon who always want priority STAB, and are fine with it as its only STAB move of that type */
const PRIORITY_POKEMON = [
	'aegislash', 'banette', 'breloom', 'cacturne', 'doublade', 'dusknoir', 'honchkrow', 'scizor', 'scizormega', 'shedinja',
];

export class RandomGen6Teams extends RandomGen7Teams {
	override randomSets: { [species: string]: RandomTeamsTypes.RandomSpeciesData } = require('./sets.json');

	constructor(format: Format | string, prng: PRNG | PRNGSeed | null) {
		super(format, prng);

		this.noStab = NO_STAB;
		this.priorityPokemon = PRIORITY_POKEMON;

		this.moveEnforcementCheckers = {
			Bug: (movePool, moves, abilities, types, counter) => (
				['megahorn', 'pinmissile'].some(m => movePool.includes(m)) ||
				!counter.get('Bug') && abilities.includes('Tinted Lens')
			),
			Dark: (movePool, moves, abilities, types, counter) => !counter.get('Dark'),
			Dragon: (movePool, moves, abilities, types, counter) => !counter.get('Dragon'),
			Electric: (movePool, moves, abilities, types, counter) => !counter.get('Electric'),
			Fairy: (movePool, moves, abilities, types, counter) => !counter.get('Fairy'),
			Fighting: (movePool, moves, abilities, types, counter) => !counter.get('Fighting'),
			Fire: (movePool, moves, abilities, types, counter) => !counter.get('Fire'),
			Flying: (movePool, moves, abilities, types, counter, species) => (
				!counter.get('Flying') && !['aerodactyl', 'aerodactylmega', 'mantine', 'murkrow'].includes(species.id) &&
				!movePool.includes('hiddenpowerflying')
			),
			Ghost: (movePool, moves, abilities, types, counter) => !counter.get('Ghost'),
			Grass: (movePool, moves, abilities, types, counter, species) => (
				!counter.get('Grass') && (species.baseStats.atk >= 100 || movePool.includes('leafstorm'))
			),
			Ground: (movePool, moves, abilities, types, counter) => !counter.get('Ground'),
			Ice: (movePool, moves, abilities, types, counter) => (
				!counter.get('Ice') || (moves.has('icebeam') && movePool.includes('freezedry')) ||
				abilities.includes('Refrigerate') && (movePool.includes('return') || movePool.includes('hypervoice'))
			),
			Normal: movePool => movePool.includes('boomburst'),
			Poison: (movePool, moves, abilities, types, counter) => !counter.get('Poison'),
			Psychic: (movePool, moves, abilities, types, counter) => (
				!counter.get('Psychic') && (types.has('Fighting') || types.has('Fairy') || movePool.includes('calmmind'))
			),
			Rock: (movePool, moves, abilities, types, counter, species) => (!counter.get('Rock') && species.baseStats.atk >= 80),
			Steel: (movePool, moves, abilities, types, counter, species) => (!counter.get('Steel') && species.baseStats.atk >= 100),
			Water: (movePool, moves, abilities, types, counter) => !counter.get('Water'),
		};
		this.cachedStatusMoves = this.dex.moves.all()
			.filter(move => move.category === 'Status')
			.map(move => move.id);
	}

	override cullMovePool(
		types: Set<string>,
		moves: Set<string>,
		abilities: string[],
		counter: MoveCounter,
		movePool: string[],
		teamDetails: RandomTeamsTypes.TeamDetails,
		species: Species,
		isLead: boolean,
		preferredType: string,
		role: RandomTeamsTypes.Role,
	): void {
		// Pokemon cannot have multiple Hidden Powers in any circumstance
		let hasHiddenPower = false;
		for (const move of moves) {
			if (move.startsWith('hiddenpower')) hasHiddenPower = true;
		}
		if (hasHiddenPower) {
			let movePoolHasHiddenPower = true;
			while (movePoolHasHiddenPower) {
				movePoolHasHiddenPower = false;
				for (const moveid of movePool) {
					if (moveid.startsWith('hiddenpower')) {
						this.fastPop(movePool, movePool.indexOf(moveid));
						movePoolHasHiddenPower = true;
						break;
					}
				}
			}
		}

		if (moves.size + movePool.length <= this.maxMoveCount) return;
		// If we have two unfilled moves and only one unpaired move, cull the unpaired move.
		if (moves.size === this.maxMoveCount - 2) {
			const unpairedMoves = [...movePool];
			for (const pair of MOVE_PAIRS) {
				if (movePool.includes(pair[0]) && movePool.includes(pair[1])) {
					this.fastPop(unpairedMoves, unpairedMoves.indexOf(pair[0]));
					this.fastPop(unpairedMoves, unpairedMoves.indexOf(pair[1]));
				}
			}
			if (unpairedMoves.length === 1) {
				this.fastPop(movePool, movePool.indexOf(unpairedMoves[0]));
			}
		}

		// These moves are paired, and shouldn't appear if there is not room for them both.
		if (moves.size === this.maxMoveCount - 1) {
			for (const pair of MOVE_PAIRS) {
				if (movePool.includes(pair[0]) && movePool.includes(pair[1])) {
					this.fastPop(movePool, movePool.indexOf(pair[0]));
					this.fastPop(movePool, movePool.indexOf(pair[1]));
				}
			}
		}

		// Team-based move culls
		if (teamDetails.screens && movePool.length >= this.maxMoveCount + 2) {
			if (movePool.includes('reflect')) this.fastPop(movePool, movePool.indexOf('reflect'));
			if (movePool.includes('lightscreen')) this.fastPop(movePool, movePool.indexOf('lightscreen'));
			if (moves.size + movePool.length <= this.maxMoveCount) return;
		}
		if (teamDetails.stickyWeb) {
			if (movePool.includes('stickyweb')) this.fastPop(movePool, movePool.indexOf('stickyweb'));
			if (moves.size + movePool.length <= this.maxMoveCount) return;
		}
		if (teamDetails.stealthRock) {
			if (movePool.includes('stealthrock')) this.fastPop(movePool, movePool.indexOf('stealthrock'));
			if (moves.size + movePool.length <= this.maxMoveCount) return;
		}
		if (teamDetails.defog || teamDetails.rapidSpin) {
			if (movePool.includes('defog')) this.fastPop(movePool, movePool.indexOf('defog'));
			if (movePool.includes('rapidspin')) this.fastPop(movePool, movePool.indexOf('rapidspin'));
			if (moves.size + movePool.length <= this.maxMoveCount) return;
		}
		if (teamDetails.toxicSpikes) {
			if (movePool.includes('toxicspikes')) this.fastPop(movePool, movePool.indexOf('toxicspikes'));
			if (moves.size + movePool.length <= this.maxMoveCount) return;
		}
		if (teamDetails.spikes && teamDetails.spikes >= 2) {
			if (movePool.includes('spikes')) this.fastPop(movePool, movePool.indexOf('spikes'));
			if (moves.size + movePool.length <= this.maxMoveCount) return;
		}
		if (teamDetails.statusCure) {
			if (movePool.includes('aromatherapy')) this.fastPop(movePool, movePool.indexOf('aromatherapy'));
			if (movePool.includes('healbell')) this.fastPop(movePool, movePool.indexOf('healbell'));
			if (moves.size + movePool.length <= this.maxMoveCount) return;
		}

		// Develop additional move lists
		const badWithSetup = ['defog', 'dragontail', 'haze', 'healbell', 'nuzzle', 'pursuit', 'rapidspin', 'toxic'];
		const statusMoves = this.cachedStatusMoves;

		// General incompatibilities
		const incompatiblePairs = [
			// These moves don't mesh well with other aspects of the set
			[statusMoves, ['healingwish', 'memento', 'switcheroo', 'trick']],
			[SETUP, PIVOT_MOVES],
			[SETUP, HAZARDS],
			[SETUP, badWithSetup],
			[PHYSICAL_SETUP, PHYSICAL_SETUP],
			[SPEED_SETUP, 'quickattack'],
			['defog', HAZARDS],
			[['fakeout', 'uturn'], ['switcheroo', 'trick']],
			['substitute', PIVOT_MOVES],
			['leechseed', 'dragontail'],
			['rest', 'substitute'],
			[PHYSICAL_SETUP, 'dracometeor'],
			[SPECIAL_SETUP, 'knockoff'],

			// These attacks are redundant with each other
			['psychic', 'psyshock'],
			['scald', ['hydropump', 'originpulse', 'waterpulse']],
			['return', ['bodyslam', 'doubleedge']],
			[['fierydance', 'lavaplume'], ['fireblast', 'magmastorm']],
			[['flamethrower', 'flareblitz'], ['fireblast', 'overheat']],
			['hornleech', 'woodhammer'],
			[['gigadrain', 'leafstorm'], ['leafstorm', 'petaldance', 'powerwhip']],
			['wildcharge', 'thunderbolt'],
			[['gunkshot', 'sludgewave'], 'poisonjab'],
			[['drainpunch', 'focusblast'], ['closecombat', 'highjumpkick', 'superpower']],
			['stoneedge', 'headsmash'],
			['dracometeor', 'dragonpulse'],
			['dragonclaw', 'outrage'],
			['knockoff', ['darkpulse', 'foulplay']],

			// Status move incompatibilities
			['toxic', 'toxicspikes'],
			['taunt', 'disable'],
			['defog', ['leechseed', 'substitute']],

			// Assorted hardcodes go here:
			// Lunatone
			['moonlight', 'rockpolish'],
			// Smeargle
			['nuzzle', 'whirlwind'],
			// Liepard
			['copycat', 'uturn'],
			// Seviper
			['switcheroo', 'suckerpunch'],
			// Jirachi
			['bodyslam', 'healingwish'],
			// Bastiodon
			[['roar', 'protect'], ['metalburst', 'protect']],
		];

		for (const pair of incompatiblePairs) this.incompatibleMoves(moves, movePool, pair[0], pair[1]);

		if (!types.has('Dark') && preferredType !== 'Dark') {
			this.incompatibleMoves(moves, movePool, 'knockoff', ['pursuit', 'suckerpunch']);
		}

		const statusInflictingMoves = ["nuzzle", 'thunderwave', 'toxic', 'willowisp', 'yawn'];
		if (!abilities.includes('Prankster') && role !== 'Staller') {
			this.incompatibleMoves(moves, movePool, statusInflictingMoves, statusInflictingMoves);
		}

		if (abilities.includes('Guts')) this.incompatibleMoves(moves, movePool, 'protect', 'swordsdance');

		// Force Protect and U-turn on Beedrill-Mega
		if (species.id === 'beedrillmega') {
			this.incompatibleMoves(moves, movePool, 'drillrun', 'knockoff');
		}

		// Cull filler moves for otherwise fixed set Stealth Rock users
		if (!teamDetails.stealthRock) {
			if (species.id === 'registeel' && role === 'Staller') {
				if (movePool.includes('thunderwave')) this.fastPop(movePool, movePool.indexOf('thunderwave'));
				if (moves.size + movePool.length <= this.maxMoveCount) return;
			}
			if (species.baseSpecies === 'Wormadam' && role === 'Staller') {
				if (movePool.includes('infestation')) this.fastPop(movePool, movePool.indexOf('infestation'));
				if (moves.size + movePool.length <= this.maxMoveCount) return;
			}
		}
	}

	// Generate random moveset for a given species, role, preferred type.
	override randomMoveset(
		types: Set<string>,
		abilities: string[],
		teamDetails: RandomTeamsTypes.TeamDetails,
		species: Species,
		isLead: boolean,
		movePool: string[],
		preferredType: string,
		role: RandomTeamsTypes.Role,
	): Set<string> {
		const moves = new Set<string>();
		let counter = this.queryMoves(moves, species, preferredType, abilities);
		this.cullMovePool(types, moves, abilities, counter, movePool, teamDetails, species, isLead,
			preferredType, role);

		// If there are only four moves, add all moves and return early
		if (movePool.length <= this.maxMoveCount) {
			// Still need to ensure that multiple Hidden Powers are not added (if maxMoveCount is increased)
			while (movePool.length) {
				const moveid = this.sample(movePool);
				counter = this.addMove(moveid, moves, types, abilities, teamDetails, species, isLead,
					movePool, preferredType, role);
			}
			return moves;
		}

		const runEnforcementChecker = (checkerName: string) => {
			if (!this.moveEnforcementCheckers[checkerName]) return false;
			return this.moveEnforcementCheckers[checkerName](
				movePool, moves, abilities, types, counter, species, teamDetails, isLead, false, preferredType, role
			);
		};

		// Add required move (e.g. Relic Song for Meloetta-P)
		if (species.requiredMove) {
			const move = this.dex.moves.get(species.requiredMove).id;
			counter = this.addMove(move, moves, types, abilities, teamDetails, species, isLead,
				movePool, preferredType, role);
		}

		// Add other moves you really want to have, e.g. STAB, recovery, setup.

		// Enforce Facade if Guts is a possible ability
		if (movePool.includes('facade') && abilities.includes('Guts')) {
			counter = this.addMove('facade', moves, types, abilities, teamDetails, species, isLead,
				movePool, preferredType, role);
		}

		// Enforce Blizzard, Seismic Toss, Spore, and Sticky Web
		for (const moveid of ['blizzard', 'seismictoss', 'spore', 'stickyweb']) {
			if (movePool.includes(moveid)) {
				counter = this.addMove(moveid, moves, types, abilities, teamDetails, species, isLead,
					movePool, preferredType, role);
			}
		}

		// Enforce Thunder Wave on Prankster users
		if (movePool.includes('thunderwave') && abilities.includes('Prankster')) {
			counter = this.addMove('thunderwave', moves, types, abilities, teamDetails, species, isLead,
				movePool, preferredType, role);
		}

		// Enforce Shadow Sneak on Kecleon
		if (movePool.includes('shadowsneak') && species.id === 'kecleon') {
			counter = this.addMove('shadowsneak', moves, types, abilities, teamDetails, species, isLead,
				movePool, preferredType, role);
		}

		// Enforce Destiny Bond on Mega Banette, since that move is its entire reason to exist
		if (movePool.includes('destinybond') && species.id === 'banettemega') {
			counter = this.addMove('destinybond', moves, types, abilities, teamDetails, species, isLead,
				movePool, preferredType, role);
		}

		// Enforce hazard removal on Bulky Support if the team doesn't already have it
		if (role === 'Bulky Support' && !teamDetails.defog && !teamDetails.rapidSpin) {
			if (movePool.includes('rapidspin')) {
				counter = this.addMove('rapidspin', moves, types, abilities, teamDetails, species, isLead,
					movePool, preferredType, role);
			}
			if (movePool.includes('defog')) {
				counter = this.addMove('defog', moves, types, abilities, teamDetails, species, isLead,
					movePool, preferredType, role);
			}
		}

		// Enforce STAB priority
		if (['Bulky Attacker', 'Bulky Setup', 'Wallbreaker'].includes(role) || this.priorityPokemon.includes(species.id)) {
			const priorityMoves = [];
			for (const moveid of movePool) {
				const move = this.dex.moves.get(moveid);
				const moveType = this.getMoveType(move, species, abilities, preferredType);
				if (types.has(moveType) && move.priority > 0 && (move.basePower || move.basePowerCallback)) {
					priorityMoves.push(moveid);
				}
			}
			if (priorityMoves.length) {
				const moveid = this.sample(priorityMoves);
				counter = this.addMove(moveid, moves, types, abilities, teamDetails, species, isLead,
					movePool, preferredType, role);
			}
		}

		// Enforce STAB
		for (const type of types) {
			// Check if a STAB move of that type should be required
			const stabMoves = [];
			for (const moveid of movePool) {
				const move = this.dex.moves.get(moveid);
				const moveType = this.getMoveType(move, species, abilities, preferredType);
				if (!this.noStab.includes(moveid) && (move.basePower || move.basePowerCallback) && type === moveType) {
					stabMoves.push(moveid);
				}
			}
			while (runEnforcementChecker(type)) {
				if (!stabMoves.length) break;
				const moveid = this.sampleNoReplace(stabMoves);
				counter = this.addMove(moveid, moves, types, abilities, teamDetails, species, isLead,
					movePool, preferredType, role);
			}
		}

		// Enforce Preferred Type
		if (!counter.get(preferredType)) {
			const stabMoves = [];
			for (const moveid of movePool) {
				const move = this.dex.moves.get(moveid);
				const moveType = this.getMoveType(move, species, abilities, preferredType);
				if (!this.noStab.includes(moveid) && (move.basePower || move.basePowerCallback) && preferredType === moveType) {
					stabMoves.push(moveid);
				}
			}
			if (stabMoves.length) {
				const moveid = this.sample(stabMoves);
				counter = this.addMove(moveid, moves, types, abilities, teamDetails, species, isLead,
					movePool, preferredType, role);
			}
		}

		// If no STAB move was added, add a STAB move
		if (!counter.get('stab')) {
			const stabMoves = [];
			for (const moveid of movePool) {
				const move = this.dex.moves.get(moveid);
				const moveType = this.getMoveType(move, species, abilities, preferredType);
				if (!this.noStab.includes(moveid) && (move.basePower || move.basePowerCallback) && types.has(moveType)) {
					stabMoves.push(moveid);
				}
			}
			if (stabMoves.length) {
				const moveid = this.sample(stabMoves);
				counter = this.addMove(moveid, moves, types, abilities, teamDetails, species, isLead,
					movePool, preferredType, role);
			} else {
				// If they have no regular STAB move, enforce U-turn on Bug types.
				if (movePool.includes('uturn') && types.has('Bug')) {
					counter = this.addMove('uturn', moves, types, abilities, teamDetails, species, isLead,
						movePool, preferredType, role);
				}
			}
		}

		// Enforce recovery
		if (['Bulky Support', 'Bulky Attacker', 'Bulky Setup', 'Staller'].includes(role)) {
			const recoveryMoves = movePool.filter(moveid => RECOVERY_MOVES.includes(moveid));
			if (recoveryMoves.length) {
				const moveid = this.sample(recoveryMoves);
				counter = this.addMove(moveid, moves, types, abilities, teamDetails, species, isLead,
					movePool, preferredType, role);
			}
		}

		// Enforce Staller moves
		if (role === 'Staller') {
			const enforcedMoves = [...PROTECT_MOVES, 'toxic'];
			for (const move of enforcedMoves) {
				if (movePool.includes(move)) {
					counter = this.addMove(move, moves, types, abilities, teamDetails, species, isLead,
						movePool, preferredType, role);
				}
			}
		}

		// Enforce setup
		if (role.includes('Setup')) {
			const setupMoves = movePool.filter(moveid => SETUP.includes(moveid));
			if (setupMoves.length) {
				const moveid = this.sample(setupMoves);
				counter = this.addMove(moveid, moves, types, abilities, teamDetails, species, isLead,
					movePool, preferredType, role);
			}
		}

		// Enforce a move not on the noSTAB list
		if (!counter.damagingMoves.size && !(moves.has('uturn') && types.has('Bug'))) {
			// Choose an attacking move
			const attackingMoves = [];
			for (const moveid of movePool) {
				const move = this.dex.moves.get(moveid);
				if (!this.noStab.includes(moveid) && (move.category !== 'Status')) attackingMoves.push(moveid);
			}
			if (attackingMoves.length) {
				const moveid = this.sample(attackingMoves);
				counter = this.addMove(moveid, moves, types, abilities, teamDetails, species, isLead,
					movePool, preferredType, role);
			}
		}

		// Enforce coverage move
		if (['Fast Attacker', 'Setup Sweeper', 'Bulky Attacker', 'Wallbreaker'].includes(role)) {
			if (counter.damagingMoves.size === 1) {
				// Find the type of the current attacking move
				const currentAttackType = counter.damagingMoves.values().next().value!.type;
				// Choose an attacking move that is of different type to the current single attack
				const coverageMoves = [];
				for (const moveid of movePool) {
					const move = this.dex.moves.get(moveid);
					const moveType = this.getMoveType(move, species, abilities, preferredType);
					if (!this.noStab.includes(moveid) && (move.basePower || move.basePowerCallback)) {
						if (currentAttackType !== moveType) coverageMoves.push(moveid);
					}
				}
				if (coverageMoves.length) {
					const moveid = this.sample(coverageMoves);
					counter = this.addMove(moveid, moves, types, abilities, teamDetails, species, isLead,
						movePool, preferredType, role);
				}
			}
		}

		// Choose remaining moves randomly from movepool and add them to moves list:
		while (moves.size < this.maxMoveCount && movePool.length) {
			const moveid = this.sample(movePool);
			counter = this.addMove(moveid, moves, types, abilities, teamDetails, species, isLead,
				movePool, preferredType, role);
			for (const pair of MOVE_PAIRS) {
				if (moveid === pair[0] && movePool.includes(pair[1])) {
					counter = this.addMove(pair[1], moves, types, abilities, teamDetails, species, isLead,
						movePool, preferredType, role);
				}
				if (moveid === pair[1] && movePool.includes(pair[0])) {
					counter = this.addMove(pair[0], moves, types, abilities, teamDetails, species, isLead,
						movePool, preferredType, role);
				}
			}
		}
		return moves;
	}

	override shouldCullAbility(
		ability: string,
		types: Set<string>,
		moves: Set<string>,
		abilities: string[],
		counter: MoveCounter,
		teamDetails: RandomTeamsTypes.TeamDetails,
		species: Species,
	): boolean {
		switch (ability) {
		case 'Chlorophyll': case 'Solar Power':
			return !teamDetails.sun;
		case 'Hydration': case 'Swift Swim':
			return !teamDetails.rain;
		case 'Iron Fist': case 'Sheer Force': case 'Technician':
			return !counter.get(toID(ability));
		case 'Overgrow':
			return !counter.get('Grass');
		case 'Prankster':
			return !counter.get('Status');
		case 'Rock Head':
			return !counter.get('recoil');
		case 'Sand Force': case 'Sand Rush':
			return !teamDetails.sand;
		case 'Swarm':
			return !counter.get('Bug');
		}

		return false;
	}

	override getAbility(
		types: Set<string>,
		moves: Set<string>,
		abilities: string[],
		counter: MoveCounter,
		teamDetails: RandomTeamsTypes.TeamDetails,
		species: Species,
	): string {
		if (abilities.length <= 1) return abilities[0];

		// Hard-code abilities here
		if (species.id === 'pangoro' && counter.get('ironfist')) return 'Iron Fist';
		if (species.id === 'tornadus' && counter.get('Status')) return 'Prankster';
		if (species.id === 'marowak' && counter.get('recoil')) return 'Rock Head';
		if (species.id === 'kingler' && counter.get('sheerforce')) return 'Sheer Force';
		if (species.id === 'golduck' && teamDetails.rain) return 'Swift Swim';
		if (species.id === 'roserade' && counter.get('technician')) return 'Technician';

		const abilityAllowed: string[] = [];
		// Obtain a list of abilities that are allowed (not culled)
		for (const ability of abilities) {
			if (!this.shouldCullAbility(ability, types, moves, abilities, counter, teamDetails, species)) {
				abilityAllowed.push(ability);
			}
		}

		// Pick a random allowed ability
		if (abilityAllowed.length >= 1) return this.sample(abilityAllowed);

		// If all abilities are rejected, prioritize weather abilities over non-weather abilities
		if (!abilityAllowed.length) {
			const weatherAbilities = abilities.filter(
				a => ['Chlorophyll', 'Hydration', 'Sand Force', 'Sand Rush', 'Solar Power', 'Swift Swim'].includes(a)
			);
			if (weatherAbilities.length) return this.sample(weatherAbilities);
		}

		// Pick a random ability
		return this.sample(abilities);
	}

	override getPriorityItem(
		ability: string,
		types: Set<string>,
		moves: Set<string>,
		counter: MoveCounter,
		teamDetails: RandomTeamsTypes.TeamDetails,
		species: Species,
		isLead: boolean,
		preferredType: string,
		role: RandomTeamsTypes.Role,
	): string | undefined {
		if (species.requiredItems) return this.sample(species.requiredItems);
		if (role === 'AV Pivot') return 'Assault Vest';
		if (species.name === 'Farfetch\u2019d') return 'Stick';
		if (species.name === 'Latias' || species.name === 'Latios') return 'Soul Dew';
		if (species.name === 'Marowak') return 'Thick Club';
		if (species.name === 'Pikachu') return 'Light Ball';
		if (species.name === 'Shedinja' || species.name === 'Smeargle') return 'Focus Sash';
		if (species.name === 'Talonflame') return 'Sharp Beak';
		if (species.name === 'Unfezant' || moves.has('focusenergy')) return 'Scope Lens';
		if (species.name === 'Wobbuffet') return 'Custap Berry';
		if (species.name === 'Shuckle') return 'Mental Herb';
		if (species.name === 'Honchkrow') return 'Life Orb';
		if (ability === 'Harvest' || ability === 'Cheek Pouch') return 'Sitrus Berry';
		if (species.name === 'Ditto') return 'Choice Scarf';
		if (ability === 'Poison Heal') return 'Toxic Orb';
		if (ability === 'Speed Boost') return 'Life Orb';
		if (species.nfe) return (species.name === 'Scyther' && role === 'Fast Attacker') ? 'Choice Band' : 'Eviolite';
		if (['healingwish', 'memento', 'switcheroo', 'trick'].some(m => moves.has(m))) {
			if (species.baseStats.spe >= 60 && species.baseStats.spe <= 108 && role !== 'Wallbreaker') {
				return 'Choice Scarf';
			} else {
				return (counter.get('Physical') > counter.get('Special')) ? 'Choice Band' : 'Choice Specs';
			}
		}
		if (moves.has('bellydrum')) return 'Sitrus Berry';
		if (moves.has('waterspout')) return 'Choice Scarf';
		if (moves.has('geomancy') || moves.has('skyattack')) return 'Power Herb';
		if (moves.has('shellsmash')) {
			return (ability === 'Solid Rock' && !!counter.get('priority')) ? 'Weakness Policy' : 'White Herb';
		}
		if (moves.has('psychoshift')) return 'Flame Orb';
		if ((ability === 'Guts' || moves.has('facade')) && !moves.has('sleeptalk') && species.id !== 'stoutland') {
			return species.name === 'Conkeldurr' ? 'Flame Orb' : 'Toxic Orb';
		}
		if (ability === 'Magic Guard') return moves.has('counter') ? 'Focus Sash' : 'Life Orb';
		if (species.id === 'rampardos' && role === 'Fast Attacker') return 'Choice Scarf';
		if (ability === 'Sheer Force' && counter.get('sheerforce')) return 'Life Orb';
		if (ability === 'Unburden') return (species.id === 'hitmonlee') ? 'White Herb' : 'Sitrus Berry';
		if (moves.has('acrobatics')) return '';
		if (moves.has('lightscreen') && moves.has('reflect')) return 'Light Clay';
		if (moves.has('rest') && !moves.has('sleeptalk') && !['Hydration', 'Natural Cure', 'Shed Skin'].includes(ability)) {
			return 'Chesto Berry';
		}
		if (role === 'Staller') return 'Leftovers';
	}

	override getItem(
		ability: string,
		types: Set<string>,
		moves: Set<string>,
		counter: MoveCounter,
		teamDetails: RandomTeamsTypes.TeamDetails,
		species: Species,
		isLead: boolean,
		preferredType: string,
		role: RandomTeamsTypes.Role,
	): string {
		const defensiveStatTotal = species.baseStats.hp + species.baseStats.def + species.baseStats.spd;

		const scarfReqs = (
			role !== 'Wallbreaker' &&
			species.baseStats.spe >= 60 && species.baseStats.spe <= 108 &&
			!counter.get('priority') && !moves.has('pursuit')
		);

		if (
			moves.has('pursuit') && moves.has('suckerpunch') && counter.get('Dark') && !this.priorityPokemon.includes(species.id)
		) return 'Black Glasses';
		if (counter.get('Special') === 4) {
			return (
				scarfReqs && species.baseStats.spa >= 90 && this.randomChance(1, 2)
			) ? 'Choice Scarf' : 'Choice Specs';
		}
		if (counter.get('Special') === 3 && moves.has('uturn')) return 'Choice Specs';
		if (counter.get('Physical') === 4 && species.id !== 'jirachi' &&
			['dragontail', 'fakeout', 'flamecharge', 'nuzzle', 'rapidspin'].every(m => !moves.has(m))
		) {
			return (
				scarfReqs && (species.baseStats.atk >= 100 || ability === 'Pure Power' || ability === 'Huge Power') &&
				this.randomChance(1, 2)
			) ? 'Choice Scarf' : 'Choice Band';
		}

		if (ability === 'Sturdy' && moves.has('explosion') && !counter.get('speedsetup')) return 'Custap Berry';
		if (types.has('Normal') && moves.has('fakeout') && !!counter.get('Normal')) return 'Silk Scarf';
		if (role === 'Bulky Setup' && !!counter.get('speedsetup') && !moves.has('swordsdance')) {
			return 'Weakness Policy';
		}
		if (species.id === 'palkia') return 'Lustrous Orb';
		if (species.id === 'archeops') return 'Expert Belt';
		if (!counter.get('Status') && (
			['Fast Support', 'Bulky Support', 'Bulky Attacker'].some(m => role === m) || moves.has('rapidspin')
		)) {
			return 'Assault Vest';
		}
		if (moves.has('outrage') && counter.get('setup')) return 'Lum Berry';
		if (
			(ability === 'Rough Skin') || (
				species.id !== 'hooh' &&
				ability === 'Regenerator' && species.baseStats.hp + species.baseStats.def >= 180 && this.randomChance(1, 2)
			) || (
				ability !== 'Regenerator' && !counter.get('setup') && counter.get('recovery') &&
				this.dex.getEffectiveness('Fighting', species) < 1 &&
				(species.baseStats.hp + species.baseStats.def) > 200 && this.randomChance(1, 2)
			)
		) return 'Rocky Helmet';
		if (['kingsshield', 'protect', 'spikyshield', 'substitute'].some(m => moves.has(m))) return 'Leftovers';
		if (
			(role === 'Fast Support' || moves.has('stickyweb')) && isLead && defensiveStatTotal < 255 &&
			!counter.get('recovery') && (counter.get('hazards') || counter.get('setup')) &&
			(!counter.get('recoil') || ability === 'Rock Head')
		) return 'Focus Sash';

		// Default Items
		if (role === 'Fast Support') {
			return (
				counter.get('Physical') + counter.get('Special') >= 3 &&
				['nuzzle', 'rapidspin', 'uturn', 'voltswitch'].every(m => !moves.has(m)) &&
				this.dex.getEffectiveness('Rock', species) < 2
			) ? 'Life Orb' : 'Leftovers';
		}
		if (!counter.get('Status')) {
			return (
				(moves.has('uturn') || moves.has('voltswitch')) && !counter.get('Dragon') && !counter.get('Normal')
			) ? 'Expert Belt' : 'Life Orb';
		}
		if (
			['Fast Attacker', 'Setup Sweeper', 'Wallbreaker'].some(m => role === m) &&
			this.dex.getEffectiveness('Rock', species) < 2 && ability !== 'Sturdy'
		) return 'Life Orb';
		return 'Leftovers';
	}

	override randomSet(
		species: string | Species,
		teamDetails: RandomTeamsTypes.TeamDetails = {},
		isLead = false
	): RandomTeamsTypes.RandomSet {
		const ruleTable = this.dex.formats.getRuleTable(this.format);

		species = this.dex.species.get(species);
		const forme = this.getForme(species);
		const sets = this.randomSets[species.id]["sets"];
		const possibleSets = [];
		for (const set of sets) possibleSets.push(set);
		const set = this.sampleIfArray(possibleSets);
		const role = set.role;
		const movePool: string[] = Array.from(set.movepool);
		const preferredTypes = set.preferredTypes;
		const preferredType = this.sampleIfArray(preferredTypes) || '';

		let ability = '';
		let item = undefined;

		const evs = { hp: 85, atk: 85, def: 85, spa: 85, spd: 85, spe: 85 };
		const ivs = { hp: 31, atk: 31, def: 31, spa: 31, spd: 31, spe: 31 };

		const types = new Set(species.types);
		const baseAbilities = set.abilities!;
		// Use the mega's ability for moveset generation
		const abilities = (species.battleOnly && !species.requiredAbility) ? Object.values(species.abilities) : baseAbilities;

		// Get moves
		const moves = this.randomMoveset(types, abilities, teamDetails, species, isLead, movePool,
			preferredType, role);
		const counter = this.queryMoves(moves, species, preferredType, abilities);

		// Get ability
		ability = this.getAbility(new Set(types), moves, baseAbilities, counter, teamDetails, species);

		// Get items
		item = this.getPriorityItem(ability, types, moves, counter, teamDetails, species, isLead, preferredType, role);
		if (item === undefined) {
			item = this.getItem(ability, types, moves, counter, teamDetails, species, isLead, preferredType, role);
		}

		// For Trick / Switcheroo
		if (item === 'Leftovers' && types.has('Poison')) {
			item = 'Black Sludge';
		}

		const level = this.getLevel(species);

		// Minimize confusion damage, including if Foul Play is its only physical attack
		if (
			(!counter.get('Physical') || (counter.get('Physical') <= 1 && (moves.has('foulplay') || moves.has('rapidspin')))) &&
			!moves.has('copycat') && !moves.has('transform') &&
			!ruleTable.has('forceofthefallenmod')
		) {
			evs.atk = 0;
			ivs.atk = 0;
		}

		// We use a special variable to track Hidden Power
		// so that we can check for all Hidden Powers at once
		let hasHiddenPower = false;
		for (const move of moves) {
			if (move.startsWith('hiddenpower')) hasHiddenPower = true;
		}

		if (hasHiddenPower || species.id === 'ditto') {
			let hpType;
			for (const move of moves) {
				if (move.startsWith('hiddenpower')) hpType = move.substr(11);
			}
			// Ditto gets IVs to copy Hidden Power Ice
			if (species.id === 'ditto') hpType = 'ice';
			if (!hpType) throw new Error(`hasHiddenPower is true, but no Hidden Power move was found.`);
			const HPivs = ivs.atk === 0 ? ZeroAttackHPIVs[hpType] : this.dex.types.get(hpType).HPivs;
			let iv: StatID;
			for (iv in HPivs) {
				ivs[iv] = HPivs[iv]!;
			}
		}

		// Prepare optimal HP
		const srImmunity = ability === 'Magic Guard';
		const srWeakness = srImmunity ? 0 : this.dex.getEffectiveness('Rock', species);
		while (evs.hp > 1) {
			const hp = Math.floor(Math.floor(2 * species.baseStats.hp + ivs.hp + Math.floor(evs.hp / 4) + 100) * level / 100 + 10);
			if (moves.has('substitute') && !['Black Sludge', 'Leftovers'].includes(item)) {
				if (item === 'Sitrus Berry') {
					// Two Substitutes should activate Sitrus Berry
					if (hp % 4 === 0) break;
				} else {
					// Should be able to use Substitute four times from full HP without fainting
					if (hp % 4 > 0) break;
				}
			} else if (moves.has('bellydrum') && item === 'Sitrus Berry') {
				// Belly Drum should activate Sitrus Berry
				if (hp % 2 === 0) break;
			} else if (['highjumpkick', 'jumpkick'].some(m => moves.has(m))) {
				// Crash damage move users want an odd HP to survive two misses
				if (hp % 2 > 0) break;
			} else {
				// Maximize number of Stealth Rock switch-ins
				if (srWeakness <= 0 || ability === 'Regenerator') break;
				if (srWeakness === 1 && ['Black Sludge', 'Leftovers', 'Life Orb'].includes(item)) break;
				if (item !== 'Sitrus Berry' && hp % (4 / srWeakness) > 0) break;
				// Minimise number of Stealth Rock switch-ins to activate Sitrus Berry
				if (item === 'Sitrus Berry' && hp % (4 / srWeakness) === 0) break;
			}
			evs.hp -= 4;
		}

		if (['gyroball', 'metalburst', 'trickroom'].some(m => moves.has(m))) {
			evs.spe = 0;
			ivs.spe = (hasHiddenPower && level < 100) ? ivs.spe - 30 : 0;
		}

		// shuffle moves to add more randomness to camomons
		const shuffledMoves = Array.from(moves);
		this.prng.shuffle(shuffledMoves);

		return {
			name: species.baseSpecies,
			species: forme,
			speciesId: species.id,
			gender: species.gender || (this.random(2) ? 'F' : 'M'),
			shiny: this.randomChance(1, 1024),
			level,
			moves: shuffledMoves,
			ability,
			evs,
			ivs,
			item,
			role,
		};
	}

	override randomOldGenFactorySets: {
		[format: string]: { [species: string]: BattleFactorySpecies },
	} = require('./factory-sets.json');

	override randomFactorySet(
		species: Species,
		teamData: RandomTeamsTypes.FactoryTeamDetails,
		tier: string
	): RandomTeamsTypes.RandomFactorySet | null {
		const id = toID(species.name);
		// const flags = this.randomOldGenFactorySets[tier][id].flags;
		const setList = this.randomOldGenFactorySets[tier][id].sets;

		const itemsMax: { [k: string]: number } = { choicespecs: 1, choiceband: 1, choicescarf: 1 };
		const movesMax: { [k: string]: number } = {
			rapidspin: 1, batonpass: 1, stealthrock: 1, defog: 1, spikes: 1, toxicspikes: 1,
		};
		const requiredMoves: { [k: string]: string } = {
			stealthrock: 'hazardSet', rapidspin: 'hazardClear', defog: 'hazardClear',
		};
		const weatherAbilitiesRequire: { [k: string]: string } = {
			hydration: 'raindance', swiftswim: 'raindance',
			leafguard: 'sunnyday', solarpower: 'sunnyday', chlorophyll: 'sunnyday',
			sandforce: 'sandstorm', sandrush: 'sandstorm', sandveil: 'sandstorm',
			snowcloak: 'hail',
		};
		const weatherAbilities = ['drizzle', 'drought', 'snowwarning', 'sandstream'];

		// Build a pool of eligible sets, given the team partners
		// Also keep track of sets with moves the team requires
		let effectivePool: { set: AnyObject, moveVariants?: number[], itemVariants?: number, abilityVariants?: number }[] = [];
		const priorityPool = [];
		for (const curSet of setList) {
			if (this.forceMonotype && !species.types.includes(this.forceMonotype)) continue;

			const itemData = this.dex.items.get(curSet.item);
			if (teamData.megaCount && teamData.megaCount > 0 && itemData.megaStone) continue; // reject 2+ mega stones
			if (itemsMax[itemData.id] && teamData.has[itemData.id] >= itemsMax[itemData.id]) continue;

			const abilityState = this.dex.abilities.get(curSet.ability);
			if (weatherAbilitiesRequire[abilityState.id] && teamData.weather !== weatherAbilitiesRequire[abilityState.id]) continue;
			if (teamData.weather && weatherAbilities.includes(abilityState.id)) continue; // reject 2+ weather setters

			let reject = false;
			let hasRequiredMove = false;
			const curSetVariants = [];
			for (const move of curSet.moves) {
				const variantIndex = this.random(move.length);
				const moveId = toID(move[variantIndex]);
				if (movesMax[moveId] && teamData.has[moveId] >= movesMax[moveId]) {
					reject = true;
					break;
				}
				if (requiredMoves[moveId] && !teamData.has[requiredMoves[moveId]]) {
					hasRequiredMove = true;
				}
				curSetVariants.push(variantIndex);
			}
			if (reject) continue;
			effectivePool.push({ set: curSet, moveVariants: curSetVariants });
			if (hasRequiredMove) priorityPool.push({ set: curSet, moveVariants: curSetVariants });
		}
		if (priorityPool.length) effectivePool = priorityPool;

		if (!effectivePool.length) {
			if (!teamData.forceResult) return null;
			for (const curSet of setList) {
				effectivePool.push({ set: curSet });
			}
		}

		const setData = this.sample(effectivePool);
		const moves = [];
		for (const [i, moveSlot] of setData.set.moves.entries()) {
			moves.push(setData.moveVariants ? moveSlot[setData.moveVariants[i]] : this.sample(moveSlot));
		}

		return {
			name: setData.set.name || species.baseSpecies,
			species: setData.set.species,
			gender: setData.set.gender || species.gender || (this.randomChance(1, 2) ? 'M' : 'F'),
			item: setData.set.item || '',
			ability: setData.set.ability || species.abilities['0'],
			shiny: typeof setData.set.shiny === 'undefined' ? this.randomChance(1, 1024) : setData.set.shiny,
			level: this.adjustLevel || 100,
			happiness: typeof setData.set.happiness === 'undefined' ? 255 : setData.set.happiness,
			evs: setData.set.evs || { hp: 84, atk: 84, def: 84, spa: 84, spd: 84, spe: 84 },
			ivs: setData.set.ivs || { hp: 31, atk: 31, def: 31, spa: 31, spd: 31, spe: 31 },
			nature: setData.set.nature || 'Serious',
			moves,
		};
	}

	override randomFactoryTeam(side: PlayerOptions, depth = 0): RandomTeamsTypes.RandomFactorySet[] {
		this.enforceNoDirectCustomBanlistChanges();

		const forceResult = (depth >= 12);

		// The teams generated depend on the tier choice in such a way that
		// no exploitable information is leaked from rolling the tier in getTeam(p1).
		if (!this.factoryTier) this.factoryTier = this.sample(['Uber', 'OU', 'UU', 'RU', 'NU', 'PU']);
		const chosenTier = this.factoryTier;

		const pokemon = [];

		const pokemonPool = Object.keys(this.randomOldGenFactorySets[chosenTier]);

		const teamData: TeamData = {
			typeCount: {}, typeComboCount: {}, baseFormes: {}, megaCount: 0, has: {}, forceResult,
			weaknesses: {}, resistances: {},
		};
		const requiredMoveFamilies = ['hazardSet', 'hazardClear'];
		const requiredMoves: { [k: string]: string } = {
			stealthrock: 'hazardSet', rapidspin: 'hazardClear', defog: 'hazardClear',
		};
		const weatherAbilitiesSet: { [k: string]: string } = {
			drizzle: 'raindance', drought: 'sunnyday', snowwarning: 'hail', sandstream: 'sandstorm',
		};
		const resistanceAbilities: { [k: string]: string[] } = {
			dryskin: ['Water'], waterabsorb: ['Water'], stormdrain: ['Water'],
			flashfire: ['Fire'], heatproof: ['Fire'],
			lightningrod: ['Electric'], motordrive: ['Electric'], voltabsorb: ['Electric'],
			sapsipper: ['Grass'],
			thickfat: ['Ice', 'Fire'],
			levitate: ['Ground'],
		};

		while (pokemonPool.length && pokemon.length < this.maxTeamSize) {
			const species = this.dex.species.get(this.sampleNoReplace(pokemonPool));
			if (!species.exists) continue;

			const speciesFlags = this.randomOldGenFactorySets[chosenTier][species.id].flags;

			// Limit to one of each species (Species Clause)
			if (teamData.baseFormes[species.baseSpecies]) continue;

			// Limit the number of Megas to one
			if (!teamData.megaCount) teamData.megaCount = 0;
			if (teamData.megaCount >= 1 && speciesFlags.megaOnly) continue;

			// Dynamically scale limits for different team sizes. The default and minimum value is 1.
			const limitFactor = Math.round(this.maxTeamSize / 6) || 1;

			// Limit 2 of any type
			const types = species.types;
			let skip = false;
			for (const type of types) {
				if (teamData.typeCount[type] >= 2 * limitFactor && this.randomChance(4, 5)) {
					skip = true;
					break;
				}
			}
			if (skip) continue;

			const set = this.randomFactorySet(species, teamData, chosenTier);
			if (!set) continue;

			// Limit 1 of any type combination
			let typeCombo = types.slice().sort().join();
			if (set.ability === 'Drought' || set.ability === 'Drizzle') {
				// Drought and Drizzle don't count towards the type combo limit
				typeCombo = set.ability;
			}
			if (teamData.typeComboCount[typeCombo] >= limitFactor) continue;

			// Okay, the set passes, add it to our team
			pokemon.push(set);

			// Now that our Pokemon has passed all checks, we can update team data:
			for (const type of types) {
				if (type in teamData.typeCount) {
					teamData.typeCount[type]++;
				} else {
					teamData.typeCount[type] = 1;
				}
			}
			teamData.typeComboCount[typeCombo] = (teamData.typeComboCount[typeCombo] + 1) || 1;

			teamData.baseFormes[species.baseSpecies] = 1;

			const itemData = this.dex.items.get(set.item);
			if (itemData.megaStone) teamData.megaCount++;
			if (itemData.id in teamData.has) {
				teamData.has[itemData.id]++;
			} else {
				teamData.has[itemData.id] = 1;
			}

			const abilityState = this.dex.abilities.get(set.ability);
			if (abilityState.id in weatherAbilitiesSet) {
				teamData.weather = weatherAbilitiesSet[abilityState.id];
			}

			for (const move of set.moves) {
				const moveId = toID(move);
				if (moveId in teamData.has) {
					teamData.has[moveId]++;
				} else {
					teamData.has[moveId] = 1;
				}
				if (moveId in requiredMoves) {
					teamData.has[requiredMoves[moveId]] = 1;
				}
			}

			for (const typeName of this.dex.types.names()) {
				// Cover any major weakness (3+) with at least one resistance
				if (teamData.resistances[typeName] >= 1) continue;
				if (resistanceAbilities[abilityState.id]?.includes(typeName) || !this.dex.getImmunity(typeName, types)) {
					// Heuristic: assume that Pokemon with these abilities don't have (too) negative typing.
					teamData.resistances[typeName] = (teamData.resistances[typeName] || 0) + 1;
					if (teamData.resistances[typeName] >= 1) teamData.weaknesses[typeName] = 0;
					continue;
				}
				const typeMod = this.dex.getEffectiveness(typeName, types);
				if (typeMod < 0) {
					teamData.resistances[typeName] = (teamData.resistances[typeName] || 0) + 1;
					if (teamData.resistances[typeName] >= 1) teamData.weaknesses[typeName] = 0;
				} else if (typeMod > 0) {
					teamData.weaknesses[typeName] = (teamData.weaknesses[typeName] || 0) + 1;
				}
			}
		}
		if (pokemon.length < this.maxTeamSize) return this.randomFactoryTeam(side, ++depth);

		// Quality control
		if (!teamData.forceResult) {
			for (const requiredFamily of requiredMoveFamilies) {
				if (!teamData.has[requiredFamily]) return this.randomFactoryTeam(side, ++depth);
			}
			for (const type in teamData.weaknesses) {
				if (teamData.weaknesses[type] >= 3) return this.randomFactoryTeam(side, ++depth);
			}
		}
		return pokemon;
	}
}

export default RandomGen6Teams;
