import { RandomTeams, type MoveCounter } from "../gen9/teams";

/** Pokemon who should never be in the lead slot */
const NO_LEAD_POKEMON = [
	'Zacian', 'Zamazenta',
];

export class RandomCAPTeams extends RandomTeams {
	getCAPAbility(
		types: string[],
		moves: Set<string>,
		abilities: string[],
		counter: MoveCounter,
		teamDetails: RandomTeamsTypes.TeamDetails,
		species: Species,
		isLead: boolean,
		teraType: string,
		role: RandomTeamsTypes.Role,
	): string {
		// Hard-code abilities here
		if (species.id === 'fidgit') return moves.has('tailwind') ? 'Persistent' : 'Frisk';
		if (species.id === 'tomohawk') return moves.has('haze') ? 'Prankster' : 'Intimidate';
		// Default to regular ability selection
		return this.getAbility(types, moves, abilities, counter, teamDetails, species, isLead, false, teraType, role);
	}

	getCAPPriorityItem(
		ability: string,
		types: string[],
		moves: Set<string>,
		counter: MoveCounter,
		teamDetails: RandomTeamsTypes.TeamDetails,
		species: Species,
		isLead: boolean,
		teraType: string,
		role: RandomTeamsTypes.Role,
	) {
		if (ability === 'Mountaineer') return 'Life Orb';
	}

	override getLevel(
		species: Species,
		isDoubles: boolean,
	): number {
		if (this.adjustLevel) return this.adjustLevel;
		return (species.num > 0 ? this.randomSets[species.id]["level"] : this.randomCAPSets[species.id]["level"]) || 80;
	}

	randomCAPSet(
		s: string | Species,
		teamDetails: RandomTeamsTypes.TeamDetails = {},
		isLead = false,
		isDoubles = false
	): RandomTeamsTypes.RandomSet {
		const species = this.dex.species.get(s);
		// Generate Non-CAP Pokemon using the regular randomSet() method
		if (species.num > 0) return this.randomSet(s, teamDetails, isLead, isDoubles);
		const forme = this.getForme(species);
		const sets = this.randomCAPSets[species.id]["sets"];
		const possibleSets = [];

		const ruleTable = this.dex.formats.getRuleTable(this.format);

		for (const set of sets) {
			// Prevent Fast Bulky Setup on lead Paradox Pokemon, since it generates Booster Energy.
			const abilities = new Set(Object.values(species.abilities));
			if (isLead && (abilities.has('Protosynthesis') || abilities.has('Quark Drive')) && set.role === 'Fast Bulky Setup') {
				continue;
			}
			// Prevent Tera Blast user if the team already has one, or if Terastallizion is prevented.
			if ((teamDetails.teraBlast || ruleTable.has('terastalclause')) && set.role === 'Tera Blast user') {
				continue;
			}
			possibleSets.push(set);
		}
		const set = this.sampleIfArray(possibleSets);
		const role = set.role;
		const movePool: string[] = [];
		for (const movename of set.movepool) {
			movePool.push(this.dex.moves.get(movename).id);
		}
		const teraTypes = set.teraTypes;
		let teraType = this.sampleIfArray(teraTypes);

		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, isDoubles, movePool, teraType!, role);
		const counter = this.queryMoves(moves, species, teraType!, abilities);

		// Get ability
		ability = this.getCAPAbility(types, moves, abilities, counter, teamDetails, species, isLead, teraType!, role);

		// Get items
		// First, the priority items
		item = this.getCAPPriorityItem(ability, types, moves, counter, teamDetails, species, isLead, teraType!, role);
		if (item === undefined) {
			item = this.getPriorityItem(ability, types, moves, counter, teamDetails, species, isLead, isDoubles, teraType!, role);
		}
		if (item === undefined) {
			item = this.getItem(ability, types, moves, counter, teamDetails, species, isLead, teraType!, role);
		}

		// Get level
		const level = this.getLevel(species, isDoubles);

		// Prepare optimal HP
		const srImmunity = ability === 'Magic Guard' || item === 'Heavy-Duty Boots';
		let srWeakness = srImmunity ? 0 : this.dex.getEffectiveness('Rock', species);
		// Crash damage move users want an odd HP to survive two misses
		if (['axekick', 'highjumpkick', 'jumpkick'].some(m => moves.has(m))) srWeakness = 2;
		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') && ['Sitrus Berry', 'Salac Berry'].includes(item))) {
				// Two Substitutes should activate Sitrus Berry
				if (hp % 4 === 0) break;
			} else if ((moves.has('bellydrum') || moves.has('filletaway')) && (item === 'Sitrus Berry' || ability === 'Gluttony')) {
				// Belly Drum should activate Sitrus Berry
				if (hp % 2 === 0) break;
			} else if (moves.has('substitute') && moves.has('endeavor')) {
				// Luvdisc should be able to Substitute down to very low HP
				if (hp % 4 > 0) break;
			} else {
				// Maximize number of Stealth Rock switch-ins
				if (srWeakness <= 0 || ability === 'Regenerator' || ['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
		const noAttackStatMoves = [...moves].every(m => {
			const move = this.dex.moves.get(m);
			if (move.damageCallback || move.damage) return true;
			if (move.id === 'shellsidearm') return false;
			// Magearna and doubles Dragonite, though these can work well as a general rule
			if (move.id === 'terablast' && (
				species.id === 'porygon2' || moves.has('shiftgear') || species.baseStats.atk > species.baseStats.spa)
			) return false;
			return move.category !== 'Physical' || move.id === 'bodypress' || move.id === 'foulplay';
		});
		if (
			noAttackStatMoves && !moves.has('transform') && this.format.mod !== 'partnersincrime' &&
			!ruleTable.has('forceofthefallenmod')
		) {
			evs.atk = 0;
			ivs.atk = 0;
		}

		if (moves.has('gyroball') || moves.has('trickroom')) {
			evs.spe = 0;
			ivs.spe = 0;
		}

		// Enforce Tera Type after all set generation is done to prevent infinite generation
		if (this.forceTeraType) teraType = this.forceTeraType;

		// 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.baseSpecies === 'Greninja' ? 'M' : species.gender,
			shiny: this.randomChance(1, 1024),
			level,
			moves: shuffledMoves,
			ability,
			evs,
			ivs,
			item,
			teraType,
			role,
		};
	}

	randomCAPSets: { [species: string]: RandomTeamsTypes.RandomSpeciesData } = require('./sets.json');

	override 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 isDoubles = false;
		const typePool = this.dex.types.names().filter(name => name !== "Stellar");
		const type = this.forceMonotype || this.sample(typePool);

		const baseFormes: { [k: string]: number } = {};

		const typeCount: { [k: string]: number } = {};
		const typeComboCount: { [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 capPokemonList = Object.keys(this.randomCAPSets);

		const [pokemonPool, baseSpeciesPool] = this.getPokemonPool(type, pokemon, isMonotype, pokemonList);
		const [capPokemonPool, capBaseSpeciesPool] = this.getPokemonPool(type, pokemon, isMonotype, capPokemonList);

		let leadsRemaining = 1;
		while (baseSpeciesPool.length && pokemon.length < this.maxTeamSize) {
			let baseSpecies, species;
			// Always generate a CAP Pokemon in slot 2; other slots can randomly generate CAP Pokemon.
			if ((pokemon.length === 1 || this.randomChance(1, 5)) && capBaseSpeciesPool.length) {
				baseSpecies = this.sampleNoReplace(capBaseSpeciesPool);
				species = this.dex.species.get(this.sample(capPokemonPool[baseSpecies]));
			} else {
				baseSpecies = this.sampleNoReplace(baseSpeciesPool);
				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;

			// Treat Ogerpon formes and Terapagos like the Tera Blast user role; reject if team has one already
			if ((species.baseSpecies === 'Ogerpon' || species.baseSpecies === 'Terapagos') && teamDetails.teraBlast) continue;

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

			const types = species.types;
			const typeCombo = types.slice().sort().join();
			const weakToFreezeDry = (
				this.dex.getEffectiveness('Ice', species) > 0 ||
				(this.dex.getEffectiveness('Ice', species) > -2 && types.includes('Water'))
			);
			// Dynamically scale limits for different team sizes. The default and minimum value is 1.
			const limitFactor = Math.round(this.maxTeamSize / 6) || 1;

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

				// Limit four weak to Freeze-Dry
				if (weakToFreezeDry) {
					if (!typeWeaknesses['Freeze-Dry']) typeWeaknesses['Freeze-Dry'] = 0;
					if (typeWeaknesses['Freeze-Dry'] >= 4 * limitFactor) continue;
				}

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

			// Limit three of any type combination in Monotype
			if (!this.forceMonotype && isMonotype && (typeComboCount[typeCombo] >= 3 * limitFactor)) continue;

			let set: RandomTeamsTypes.RandomSet;

			if (leadsRemaining) {
				if (NO_LEAD_POKEMON.includes(species.baseSpecies)) {
					if (pokemon.length + leadsRemaining === this.maxTeamSize) continue;
					set = this.randomCAPSet(species, teamDetails, false, isDoubles);
					pokemon.push(set);
				} else {
					set = this.randomCAPSet(species, teamDetails, true, isDoubles);
					pokemon.unshift(set);
					leadsRemaining--;
				}
			} else {
				set = this.randomCAPSet(species, teamDetails, false, isDoubles);
				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;
				}
			}
			if (typeCombo in typeComboCount) {
				typeComboCount[typeCombo]++;
			} else {
				typeComboCount[typeCombo] = 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/Fluffy as Fire weaknesses
			if (['Dry Skin', 'Fluffy'].includes(set.ability) && this.dex.getEffectiveness('Fire', species) === 0) {
				typeWeaknesses['Fire']++;
			}
			if (weakToFreezeDry) typeWeaknesses['Freeze-Dry']++;

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

			// Track what the team has
			if (set.ability === 'Drizzle' || set.moves.includes('raindance')) teamDetails.rain = 1;
			if (set.ability === 'Drought' || set.ability === 'Orichalcum Pulse' || set.moves.includes('sunnyday')) {
				teamDetails.sun = 1;
			}
			if (set.ability === 'Sand Stream') teamDetails.sand = 1;
			if (set.ability === 'Snow Warning' || set.moves.includes('snowscape') || set.moves.includes('chillyreception')) {
				teamDetails.snow = 1;
			}
			if (set.moves.includes('healbell')) teamDetails.statusCure = 1;
			if (set.moves.includes('spikes') || set.moves.includes('ceaselessedge')) {
				teamDetails.spikes = (teamDetails.spikes || 0) + 1;
			}
			if (set.moves.includes('toxicspikes') || set.ability === 'Toxic Debris') teamDetails.toxicSpikes = 1;
			if (set.moves.includes('stealthrock') || set.moves.includes('stoneaxe')) teamDetails.stealthRock = 1;
			if (set.moves.includes('stickyweb')) teamDetails.stickyWeb = 1;
			if (set.moves.includes('defog')) teamDetails.defog = 1;
			if (set.moves.includes('rapidspin') || set.moves.includes('mortalspin')) teamDetails.rapidSpin = 1;
			if (set.moves.includes('auroraveil') || (set.moves.includes('reflect') && set.moves.includes('lightscreen'))) {
				teamDetails.screens = 1;
			}
			if (set.role === 'Tera Blast user' || species.baseSpecies === "Ogerpon" || species.baseSpecies === "Terapagos") {
				teamDetails.teraBlast = 1;
			}
		}
		if (pokemon.length < this.maxTeamSize && pokemon.length < 12) { // large teams sometimes cannot be built
			throw new Error(`Could not build a random team for ${this.format} (seed=${seed})`);
		}

		return pokemon;
	}
}

export default RandomCAPTeams;
