import RandomGen6Teams from '../gen6/teams';
import type { PRNG } from '../../../sim';
import type { MoveCounter } from '../gen8/teams';
import { toID } from '../../../sim/dex';

// Moves that restore HP:
const RECOVERY_MOVES = [
	'healorder', 'milkdrink', 'moonlight', 'morningsun', 'recover', 'roost', 'slackoff', 'softboiled', 'synthesis',
];
// Moves that boost Attack:
const PHYSICAL_SETUP = [
	'bellydrum', 'bulkup', 'coil', 'curse', 'dragondance', 'honeclaws', 'howl', 'meditate', 'screech', 'swordsdance',
];
// 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',
	'growth', 'honeclaws', 'howl', 'irondefense', 'meditate', 'nastyplot', 'quiverdance', 'raindance', 'rockpolish',
	'shellsmash', 'shiftgear', 'sunnyday', 'swordsdance', 'tailglow', 'workup',
];
// Moves that shouldn't be the only STAB moves:
const NO_STAB = [
	'aquajet', 'bulletpunch', 'chatter', 'clearsmog', 'dragontail', 'eruption', 'explosion', 'fakeout', 'flamecharge',
	'futuresight', 'iceshard', 'icywind', 'incinerate', 'knockoff', 'machpunch', 'pluck', 'pursuit', 'quickattack',
	'rapidspin', 'reversal', 'selfdestruct', 'shadowsneak', 'skyattack', 'skydrop', 'snarl', 'suckerpunch',
	'uturn', 'vacuumwave', 'voltswitch', 'waterspout',
];
// Hazard-setting moves
const HAZARDS = [
	'spikes', 'stealthrock', 'toxicspikes',
];
// Moves that switch the user out
const PIVOT_MOVES = [
	'uturn', 'voltswitch',
];

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

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

export class RandomGen5Teams extends RandomGen6Teams {
	randomSets: { [species: string]: RandomTeamsTypes.RandomSpeciesData } = require('./sets.json');

	constructor(format: string | Format, prng: PRNG | PRNGSeed | null) {
		super(format, prng);
		this.noStab = NO_STAB;
		this.priorityPokemon = PRIORITY_POKEMON;

		this.moveEnforcementCheckers = {
			Bug: (movePool, moves, abilities, types, counter) => (
				!counter.get('Bug') && (movePool.includes('megahorn') || 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'),
			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', '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'),
			Poison: (movePool, moves, abilities, types, counter) => (
				!counter.get('Poison') && (types.has('Grass') || types.has('Ground'))
			),
			Psychic: (movePool, moves, abilities, types, counter) => (
				!counter.get('Psychic') && (types.has('Fighting') || 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') && ['aggron', 'metagross'].includes(species.id)
			),
			Water: (movePool, moves, abilities, types, counter) => !counter.get('Water'),
		};
		// Nature Power is Earthquake this gen
		this.cachedStatusMoves = this.dex.moves.all()
			.filter(move => move.category === 'Status' && move.id !== 'naturepower')
			.map(move => move.id);
	}

	cullMovePool(
		types: 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.stealthRock) {
			if (movePool.includes('stealthrock')) this.fastPop(movePool, movePool.indexOf('stealthrock'));
			if (moves.size + movePool.length <= this.maxMoveCount) return;
		}
		if (teamDetails.rapidSpin) {
			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 = ['healbell', 'pursuit', 'toxic'];
		const statusMoves = this.cachedStatusMoves;

		// General incompatibilities
		const incompatiblePairs = [
			// These moves don't mesh well with other aspects of the set
			[statusMoves, ['healingwish', 'switcheroo', 'trick']],
			[SETUP, PIVOT_MOVES],
			[SETUP, HAZARDS],
			[SETUP, badWithSetup],
			[PHYSICAL_SETUP, PHYSICAL_SETUP],
			[['fakeout', 'uturn'], ['switcheroo', 'trick']],
			['substitute', PIVOT_MOVES],
			['rest', 'substitute'],

			// These attacks are redundant with each other
			['psychic', 'psyshock'],
			[['scald', 'surf'], 'hydropump'],
			[['bodyslam', 'return'], ['bodyslam', 'doubleedge']],
			[['gigadrain', 'leafstorm'], ['leafstorm', 'petaldance', 'powerwhip']],
			[['drainpunch', 'focusblast'], ['closecombat', 'highjumpkick', 'superpower']],
			['payback', 'pursuit'],

			// Assorted hardcodes go here:
			// Zebstrika
			['wildcharge', 'thunderbolt'],
			// Manectric
			['flamethrower', 'overheat'],
			// Meganium
			['leechseed', 'dragontail'],
			// Volcarona and Heatran
			[['fierydance', 'lavaplume'], 'fireblast'],
			// Walrein
			['encore', 'roar'],
			// Lunatone
			['moonlight', 'rockpolish'],
			// Smeargle
			['memento', 'whirlwind'],
			// Seviper
			['switcheroo', 'suckerpunch'],
			// Jirachi
			['bodyslam', 'healingwish'],
		];

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

		if (species.id === 'dugtrio') this.incompatibleMoves(moves, movePool, statusMoves, 'memento');

		const statusInflictingMoves = ['stunspore', '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');

		// 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('suckerpunch')) this.fastPop(movePool, movePool.indexOf('suckerpunch'));
				if (moves.size + movePool.length <= this.maxMoveCount) return;
			}
		}
	}

	// Generate random moveset for a given species, role, preferred type.
	randomMoveset(
		types: 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.newQueryMoves(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, new Set(types), counter, species, teamDetails
			);
		};

		// 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 Seismic Toss and Spore
		for (const moveid of ['seismictoss', 'spore']) {
			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 hazard removal on Bulky Support and Spinner if the team doesn't already have it
		if (['Bulky Support', 'Spinner'].includes(role) && !teamDetails.rapidSpin) {
			if (movePool.includes('rapidspin')) {
				counter = this.addMove('rapidspin', moves, types, abilities, teamDetails, species, isLead,
					movePool, preferredType, role);
			}
		}

		// Enforce STAB priority
		if (['Bulky Attacker', 'Bulky Setup'].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.includes(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('preferred')) {
			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.includes(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.includes('Bug')) {
					counter = this.addMove('uturn', moves, types, abilities, teamDetails, species, isLead,
						movePool, preferredType, role);
				}
			}
		}

		// Enforce recovery
		if (['Bulky Support', 'Bulky Attacker', 'Bulky Setup', 'Spinner', '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', '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')) {
			// First, try to add a non-Speed setup move
			const nonSpeedSetupMoves = movePool.filter(moveid => SETUP.includes(moveid) && !SPEED_SETUP.includes(moveid));
			if (nonSpeedSetupMoves.length) {
				const moveid = this.sample(nonSpeedSetupMoves);
				counter = this.addMove(moveid, moves, types, abilities, teamDetails, species, isLead,
					movePool, preferredType, role);
			} else {
				// No non-Speed setup moves, so add any (Speed) setup move
				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.includes('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;
	}

	shouldCullAbility(
		ability: string,
		types: Set<string>,
		moves: Set<string>,
		abilities: string[],
		counter: MoveCounter,
		movePool: string[],
		teamDetails: RandomTeamsTypes.TeamDetails,
		species: Species,
		preferredType: string,
		role: RandomTeamsTypes.Role
	): 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':
			return !counter.get(toID(ability));
		case 'Overgrow':
			return !counter.get('Grass');
		case 'Rock Head':
			return !counter.get('recoil');
		case 'Sand Force': case 'Sand Rush':
			return !teamDetails.sand;
		}

		return false;
	}

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

		// Hard-code abilities here
		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';

		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, movePool, teamDetails, species, preferredType, role
			)) {
				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);
	}

	getPriorityItem(
		ability: string,
		types: 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 (species.id === 'farfetchd') return 'Stick';
		if (species.id === 'latias' || species.id === 'latios') return 'Soul Dew';
		if (species.id === 'marowak') return 'Thick Club';
		if (species.id === 'pikachu') return 'Light Ball';
		if (species.id === 'shedinja' || species.id === 'smeargle') return 'Focus Sash';
		if (species.id === 'unown') return 'Choice Specs';
		if (species.id === 'wobbuffet') return 'Custap Berry';
		if (ability === 'Harvest') return 'Sitrus Berry';
		if (species.id === 'ditto') return 'Choice Scarf';
		if (species.id === 'exploud' && role === 'Bulky Attacker') return 'Choice Band';
		if (ability === 'Poison Heal' || moves.has('facade')) return 'Toxic Orb';
		if (ability === 'Speed Boost' && species.id !== 'ninjask') return 'Life Orb';
		if (species.nfe) return 'Eviolite';
		if (['healingwish', 'memento', 'switcheroo', 'trick'].some(m => moves.has(m))) {
			if (
				species.baseStats.spe >= 60 && species.baseStats.spe <= 108 && role !== 'Wallbreaker' && !counter.get('priority')
			) {
				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('shellsmash')) return 'White Herb';
		if (moves.has('psychoshift')) return 'Flame 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 (moves.has('acrobatics')) return 'Flying Gem';
		if (species.id === 'hitmonlee' && ability === 'Unburden') return moves.has('fakeout') ? 'Normal Gem' : 'Fighting Gem';
		if (moves.has('lightscreen') && moves.has('reflect')) return 'Light Clay';
		if (moves.has('rest') && !moves.has('sleeptalk') && !['Natural Cure', 'Shed Skin'].includes(ability)) {
			return (moves.has('raindance') && ability === 'Hydration') ? 'Damp Rock' : 'Chesto Berry';
		}
		if (role === 'Staller') return 'Leftovers';
	}

	getItem(
		ability: string,
		types: 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) || counter.get('Dark') >= 2)
		) 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' && species.id !== 'spinda' &&
			['dragontail', 'fakeout', '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')) return 'Custap Berry';
		if (types.includes('Normal') && moves.has('fakeout') && !!counter.get('Normal')) return 'Silk Scarf';
		if (species.id === 'palkia') return 'Lustrous Orb';
		if (moves.has('outrage') && counter.get('setup')) return 'Lum Berry';
		if (
			(ability === 'Rough Skin') || (species.id !== 'hooh' && role !== 'Wallbreaker' &&
				ability === 'Regenerator' && species.baseStats.hp + species.baseStats.def >= 180 && this.randomChance(1, 2))
		) return 'Rocky Helmet';
		if (['protect', 'substitute'].some(m => moves.has(m))) return 'Leftovers';
		if (
			this.dex.getEffectiveness('Ground', species) >= 2 &&
			ability !== 'Levitate'
		) {
			return 'Air Balloon';
		}
		if (
			role === 'Fast Support' && 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 &&
				['rapidspin', 'uturn', 'voltswitch'].every(m => !moves.has(m)) &&
				this.dex.getEffectiveness('Rock', species) < 2
			) ? 'Life Orb' : 'Leftovers';
		}
		// noStab moves that should reject Expert Belt
		const noExpertBeltMoves = (
			this.noStab.filter(moveid => ['Dragon', 'Normal', 'Poison'].includes(this.dex.moves.get(moveid).type))
		);
		const expertBeltReqs = (
			!counter.get('Dragon') && !counter.get('Normal') && !counter.get('Poison') &&
			noExpertBeltMoves.every(m => !moves.has(m))
		);
		if (
			!counter.get('Status') && expertBeltReqs &&
			(moves.has('uturn') || moves.has('voltswitch') || role === 'Fast Attacker')
		) return 'Expert Belt';
		if (
			['Fast Attacker', 'Setup Sweeper', 'Wallbreaker'].some(m => role === m) &&
			this.dex.getEffectiveness('Rock', species) < 2 && ability !== 'Sturdy'
		) return 'Life Orb';
		return 'Leftovers';
	}

	randomSet(
		species: string | Species,
		teamDetails: RandomTeamsTypes.TeamDetails = {},
		isLead = false
	): RandomTeamsTypes.RandomSet {
		species = this.dex.species.get(species);
		const forme = this.getForme(species);
		const sets = this.randomSets[species.id]["sets"];
		const possibleSets = [];
		// Check if the Pokemon has a Spinner set
		let canSpinner = false;
		for (const set of sets) {
			if (!teamDetails.rapidSpin && set.role === 'Spinner') canSpinner = true;
		}
		for (const set of sets) {
			// Prevent Spinner if the team already has removal
			if (teamDetails.rapidSpin && set.role === 'Spinner') continue;
			// Enforce Spinner if the team does not have removal
			if (canSpinner && set.role !== 'Spinner') continue;
			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 = species.types;
		const abilities = set.abilities!;

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

		// Get ability
		ability = this.getAbility(new Set(types), moves, abilities, counter, movePool, teamDetails, species,
			preferredType, role);

		// 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.includes('Poison')) {
			item = 'Black Sludge';
		}

		const level = this.getLevel(species);

		// 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) {
			let hpType;
			for (const move of moves) {
				if (move.startsWith('hiddenpower')) hpType = move.substr(11);
			}
			if (!hpType) throw new Error(`hasHiddenPower is true, but no Hidden Power move was found.`);
			const HPivs = 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;
		}

		// 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('transform')
		) {
			evs.atk = 0;
			ivs.atk = hasHiddenPower ? (ivs.atk || 31) - 28 : 0;
		}

		if (['gyroball', 'metalburst', 'trickroom'].some(m => moves.has(m))) {
			evs.spe = 0;
			ivs.spe = hasHiddenPower ? (ivs.spe || 31) - 28 : 0;
		}

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

		return {
			name: species.baseSpecies,
			species: forme,
			gender: species.gender,
			shiny: this.randomChance(1, 1024),
			level,
			moves: shuffledMoves,
			ability,
			evs,
			ivs,
			item,
			role,
		};
	}

	randomTeam() {
		this.enforceNoDirectCustomBanlistChanges();

		const seed = this.prng.getSeed();
		const ruleTable = this.dex.formats.getRuleTable(this.format);
		const pokemon: RandomTeamsTypes.RandomSet[] = [];

		// For Monotype
		const isMonotype = !!this.forceMonotype || ruleTable.has('sametypeclause');
		const typePool = this.dex.types.names();
		const type = this.forceMonotype || this.sample(typePool);

		const baseFormes: { [k: string]: number } = {};
		const typeCount: { [k: string]: number } = {};
		const typeWeaknesses: { [k: string]: number } = {};
		const typeDoubleWeaknesses: { [k: string]: number } = {};
		const teamDetails: RandomTeamsTypes.TeamDetails = {};
		let numMaxLevelPokemon = 0;

		const pokemonList = Object.keys(this.randomSets);
		const [pokemonPool, baseSpeciesPool] = this.getPokemonPool(type, pokemon, isMonotype, pokemonList);
		while (baseSpeciesPool.length && pokemon.length < this.maxTeamSize) {
			const baseSpecies = this.sampleNoReplace(baseSpeciesPool);
			const species = this.dex.species.get(this.sample(pokemonPool[baseSpecies]));
			if (!species.exists) continue;

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

			// Illusion shouldn't be in the last slot
			if (species.name === 'Zoroark' && pokemon.length >= (this.maxTeamSize - 1)) continue;

			// Prevent Shedinja from generating after Sandstorm/Hail setters
			if (species.name === 'Shedinja' && (teamDetails.sand || teamDetails.hail)) continue;

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

			const types = species.types;

			if (!isMonotype && !this.forceMonotype) {
				let skip = false;

				// Limit two of any type
				for (const typeName of types) {
					if (typeCount[typeName] >= 2 * limitFactor) {
						skip = true;
						break;
					}
				}
				if (skip) continue;

				// Limit three weak to any type, and one double weak to any type
				for (const typeName of this.dex.types.names()) {
					// it's weak to the type
					if (this.dex.getEffectiveness(typeName, species) > 0) {
						if (!typeWeaknesses[typeName]) typeWeaknesses[typeName] = 0;
						if (typeWeaknesses[typeName] >= 3 * limitFactor) {
							skip = true;
							break;
						}
					}
					if (this.dex.getEffectiveness(typeName, species) > 1) {
						if (!typeDoubleWeaknesses[typeName]) typeDoubleWeaknesses[typeName] = 0;
						if (typeDoubleWeaknesses[typeName] >= limitFactor) {
							skip = true;
							break;
						}
					}
				}
				if (skip) continue;

				// Count Dry Skin as a Fire weakness
				if (this.dex.getEffectiveness('Fire', species) === 0 && Object.values(species.abilities).includes('Dry Skin')) {
					if (!typeWeaknesses['Fire']) typeWeaknesses['Fire'] = 0;
					if (typeWeaknesses['Fire'] >= 3 * limitFactor) continue;
				}

				// Limit one level 100 Pokemon
				if (!this.adjustLevel && (this.getLevel(species) === 100) && numMaxLevelPokemon >= limitFactor) {
					continue;
				}
			}

			const set = this.randomSet(species, teamDetails, pokemon.length === 0);

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

			// Don't bother tracking details for the last Pokemon
			if (pokemon.length === this.maxTeamSize) break;

			// Now that our Pokemon has passed all checks, we can increment our counters
			baseFormes[species.baseSpecies] = 1;

			// Increment type counters
			for (const typeName of types) {
				if (typeName in typeCount) {
					typeCount[typeName]++;
				} else {
					typeCount[typeName] = 1;
				}
			}

			// Increment weakness counter
			for (const typeName of this.dex.types.names()) {
				// it's weak to the type
				if (this.dex.getEffectiveness(typeName, species) > 0) {
					typeWeaknesses[typeName]++;
				}
				if (this.dex.getEffectiveness(typeName, species) > 1) {
					typeDoubleWeaknesses[typeName]++;
				}
			}
			// Count Dry Skin as a Fire weakness
			if (set.ability === 'Dry Skin' && this.dex.getEffectiveness('Fire', species) === 0) typeWeaknesses['Fire']++;

			// Increment level 100 counter
			if (set.level === 100) numMaxLevelPokemon++;

			// Team details
			if (set.ability === 'Snow Warning' || set.moves.includes('hail')) teamDetails.hail = 1;
			if (set.ability === 'Drizzle' || set.moves.includes('raindance')) teamDetails.rain = 1;
			if (set.ability === 'Sand Stream') teamDetails.sand = 1;
			if (set.ability === 'Drought' || set.moves.includes('sunnyday')) teamDetails.sun = 1;
			if (set.moves.includes('aromatherapy') || set.moves.includes('healbell')) teamDetails.statusCure = 1;
			if (set.moves.includes('spikes')) teamDetails.spikes = (teamDetails.spikes || 0) + 1;
			if (set.moves.includes('stealthrock')) teamDetails.stealthRock = 1;
			if (set.moves.includes('toxicspikes')) teamDetails.toxicSpikes = 1;
			if (set.moves.includes('rapidspin')) teamDetails.rapidSpin = 1;
			if (set.moves.includes('reflect') && set.moves.includes('lightscreen')) teamDetails.screens = 1;
		}
		if (pokemon.length < this.maxTeamSize && pokemon.length < 12) {
			throw new Error(`Could not build a random team for ${this.format} (seed=${seed})`);
		}

		return pokemon;
	}
}

export default RandomGen5Teams;