import { ConstNumType } from '../../game/GameDataEnums';
import { TableNames } from '../../game/ConfigTableData';
import { WeightedPick } from '../../tools/WeightedPick';
import type { DailyShopParsed } from '../DailyShopTypes';
import { BattleBuffCarryStore } from './BattleBuffCarryStore';

/** 品质：1绿 2蓝 3紫 4橙 */
const QUALITY_COUNT = 4;
/** 每次三选一选项数 */
const OPTION_COUNT = 3;

/** 单次抽取结果的选项 */
export interface BattleBuffSelectOption {
    /** Battlebuff.id */
    id: number;
    /** 品质 */
    quality: number;
    /** 表行 */
    row: ITableBattlebuff;
}

/** 玩家本局三选一会话状态 */
interface BattleBuffSelectSession {
    /** playerId */
    playerId: number;
    /** 本局已弹出次数（含当前进行中） */
    popupOrdinal: number;
    /** 免费刷新剩余 */
    freeLeft: number;
    /** 广告刷新剩余 */
    adLeft: number;
    /** 当前选项 */
    options: BattleBuffSelectOption[];
}

/**
 * 局内 Battlebuff 三选一：品质权重 → 子池权重 → 选项。
 * 每玩家独立会话；开战需 reset。
 */
export class BattleBuffSelectService {
    private static readonly _sessions: BattleBuffSelectSession[] = [];

    /** 开战清空全部会话 */
    static resetAll(): void {
        this._sessions.length = 0;
    }

    /**
     * 开战初始化某玩家刷新次数。
     * @param playerId 槽位
     */
    static ensurePlayer(playerId: number): void {
        const pid = Math.max(0, Math.floor(Number(playerId) || 0));
        if (this._find(pid)) return;
        this._sessions.push({
            playerId: pid,
            popupOrdinal: 0,
            freeLeft: Math.max(0, Math.floor(gg.data.table.getConst(ConstNumType.BattleBuffFreeRefreshCount) || 0)),
            adLeft: Math.max(0, Math.floor(gg.data.table.getConst(ConstNumType.BattleBuffAdRefreshCount) || 0)),
            options: [],
        });
    }

    /**
     * 开始一次弹窗（自动刷新权重），生成 3 选项。
     * @param playerId 槽位
     */
    static beginPopup(playerId: number): BattleBuffSelectOption[] {
        this.ensurePlayer(playerId);
        const session = this._find(Math.max(0, Math.floor(Number(playerId) || 0)));
        if (!session) {
            console.warn('[BattleBuffSelect] beginPopup 无会话', playerId);
            return [];
        }
        session.popupOrdinal += 1;
        session.options = this._rollOptions(session.playerId, session.popupOrdinal, false);
        return session.options.slice();
    }

    /**
     * 主动刷新：消耗免费或广告次数后重抽（广告权重）。
     * @param playerId 槽位
     * @param useAd 是否按广告次数扣减（false=免费）
     */
    static refreshOptions(playerId: number, useAd: boolean): BattleBuffSelectOption[] | null {
        const session = this._find(Math.max(0, Math.floor(Number(playerId) || 0)));
        if (!session) {
            console.warn('[BattleBuffSelect] refresh 无会话', playerId);
            return null;
        }
        if (useAd) {
            if (session.adLeft <= 0) {
                console.warn('[BattleBuffSelect] 广告刷新次数已尽', playerId);
                return null;
            }
            session.adLeft -= 1;
        } else {
            if (session.freeLeft <= 0) {
                console.warn('[BattleBuffSelect] 免费刷新次数已尽', playerId);
                return null;
            }
            session.freeLeft -= 1;
        }
        session.options = this._rollOptions(session.playerId, session.popupOrdinal, true);
        return session.options.slice();
    }

    /**
     * 当前是否应优先免费刷新（免费剩余>0）。
     * @param playerId 槽位
     */
    static shouldUseFreeRefresh(playerId: number): boolean {
        const session = this._find(Math.max(0, Math.floor(Number(playerId) || 0)));
        return !!session && session.freeLeft > 0;
    }

    /**
     * 是否还能主动刷新。
     * @param playerId 槽位
     */
    static canRefresh(playerId: number): boolean {
        const session = this._find(Math.max(0, Math.floor(Number(playerId) || 0)));
        if (!session) return false;
        return session.freeLeft > 0 || session.adLeft > 0;
    }

    /**
     * 剩余刷新次数合计（展示用）。
     * @param playerId 槽位
     */
    static remainRefreshTotal(playerId: number): number {
        const session = this._find(Math.max(0, Math.floor(Number(playerId) || 0)));
        if (!session) return 0;
        return session.freeLeft + session.adLeft;
    }

    /** 当前弹窗选项 */
    static currentOptions(playerId: number): BattleBuffSelectOption[] {
        const session = this._find(Math.max(0, Math.floor(Number(playerId) || 0)));
        return session ? session.options.slice() : [];
    }

    /**
     * 确认选择某一选项 id。
     * @param playerId 槽位
     * @param buffId 选项 id
     */
    static confirmPick(playerId: number, buffId: number): DailyShopParsed | null {
        const session = this._find(Math.max(0, Math.floor(Number(playerId) || 0)));
        if (!session) {
            console.warn('[BattleBuffSelect] confirm 无会话', playerId);
            return null;
        }
        let hit = false;
        for (let i = 0; i < session.options.length; i++) {
            if (session.options[i].id === buffId) {
                hit = true;
                break;
            }
        }
        if (!hit) {
            console.warn('[BattleBuffSelect] confirm 非当前选项', playerId, buffId);
            return null;
        }
        const parsed = BattleBuffCarryStore.appendBuffId(playerId, buffId);
        session.options = [];
        return parsed;
    }

    /**
     * AI：开始弹窗并自动选中第一项（若有）。
     * @param playerId AI playerId
     */
    static autoPickOne(playerId: number): DailyShopParsed | null {
        const options = this.beginPopup(playerId);
        if (!options.length) {
            console.warn('[BattleBuffSelect] AI 无可选项', playerId);
            return null;
        }
        return this.confirmPick(playerId, options[0].id);
    }

    /**
     * Const27 是否包含该解锁次数。
     * @param unlockCount 本阵营已完成解锁次数（含本次）
     */
    static isTriggerUnlockCount(unlockCount: number): boolean {
        const n = Math.floor(Number(unlockCount) || 0);
        if (n <= 0) return false;
        const list = gg.data.table.getConstArray(ConstNumType.BattleSelectTriggerWaves);
        for (let i = 0; i < list.length; i++) {
            if (Math.floor(list[i]) === n) return true;
        }
        return false;
    }

    private static _find(playerId: number): BattleBuffSelectSession | null {
        for (let i = 0; i < this._sessions.length; i++) {
            if (this._sessions[i].playerId === playerId) return this._sessions[i];
        }
        return null;
    }

    /**
     * @param playerId 槽位
     * @param popupOrdinal 弹窗序号
     * @param activeRefresh true=主动刷新权重
     */
    private static _rollOptions(playerId: number, popupOrdinal: number, activeRefresh: boolean): BattleBuffSelectOption[] {
        const qualities = this._rollQualities(popupOrdinal, activeRefresh);
        const pickedIds: number[] = [];
        const out: BattleBuffSelectOption[] = [];
        for (let i = 0; i < qualities.length; i++) {
            const q = qualities[i];
            const row = this._pickRowByQuality(playerId, q, pickedIds);
            if (!row) {
                console.warn('[BattleBuffSelect] 品质池为空', q, 'player', playerId);
                continue;
            }
            pickedIds.push(row.id);
            out.push({ id: row.id, quality: q, row });
        }
        return out;
    }

    private static _rollQualities(popupOrdinal: number, activeRefresh: boolean): number[] {
        const weights = this._qualityWeights(popupOrdinal, activeRefresh);
        const out: number[] = [];
        for (let i = 0; i < OPTION_COUNT; i++) {
            const entries: { quality: number; weight: number }[] = [];
            for (let q = 1; q <= QUALITY_COUNT; q++) {
                entries.push({ quality: q, weight: weights[q - 1] });
            }
            const hit = WeightedPick.pick(entries);
            if (!hit) {
                console.warn('[BattleBuffSelect] 品质权重全 0');
                out.push(1);
                continue;
            }
            out.push(hit.quality);
        }
        return out;
    }

    private static _qualityWeights(popupOrdinal: number, activeRefresh: boolean): number[] {
        const baseId = activeRefresh ? ConstNumType.BattleBuffAdWeight : ConstNumType.BattleBuffFreeWeight;
        const purpleId = activeRefresh ? ConstNumType.BattleBuffAdPurpleBonus : ConstNumType.BattleBuffFreePurpleBonus;
        const orangeId = activeRefresh ? ConstNumType.BattleBuffAdOrangeBonus : ConstNumType.BattleBuffFreeOrangeBonus;
        const base = gg.data.table.getConstArray(baseId);
        const weights = [0, 0, 0, 0];
        for (let i = 0; i < QUALITY_COUNT; i++) {
            weights[i] = Math.max(0, Math.floor(Number(base[i]) || 0));
        }
        if (base.length < QUALITY_COUNT) {
            console.warn('[BattleBuffSelect] 品质基础权重不足 4 项', baseId, base);
        }
        this._applyQualityBonus(weights, 2, purpleId, popupOrdinal);
        this._applyQualityBonus(weights, 3, orangeId, popupOrdinal);
        return weights;
    }

    /**
     * @param weights 绿蓝紫橙
     * @param index 0~3
     * @param bonusConstId 次数,加值
     * @param popupOrdinal 弹窗序号
     */
    private static _applyQualityBonus(weights: number[], index: number, bonusConstId: number, popupOrdinal: number): void {
        const arr = gg.data.table.getConstArray(bonusConstId);
        if (arr.length < 2) {
            console.warn('[BattleBuffSelect] 品质加值配置非法', bonusConstId, arr);
            return;
        }
        const need = Math.floor(arr[0]);
        const add = Math.floor(arr[1]);
        if (need <= 0) return;
        if (popupOrdinal >= need) {
            weights[index] = Math.max(0, weights[index] + add);
        }
    }

    private static _pickRowByQuality(playerId: number, quality: number, excludeIds: readonly number[]): ITableBattlebuff | null {
        const list = gg.data.table.getTableList<ITableBattlebuff>(TableNames.Battlebuff) ?? [];
        const pool: ITableBattlebuff[] = [];
        for (let i = 0; i < list.length; i++) {
            const row = list[i];
            if (Math.floor(Number(row.quality) || 0) !== quality) continue;
            const id = Math.floor(Number(row.id) || 0);
            if (id <= 0) continue;
            let excluded = false;
            for (let e = 0; e < excludeIds.length; e++) {
                if (excludeIds[e] === id) {
                    excluded = true;
                    break;
                }
            }
            if (excluded) continue;
            const limit = Math.floor(Number(row.limit) || 0);
            if (limit > 0 && BattleBuffCarryStore.getObtainCount(playerId, id) >= limit) continue;
            const w = Number(row.weight) || 0;
            if (w <= 0) continue;
            pool.push(row);
        }
        if (!pool.length) return null;
        return WeightedPick.pick(pool);
    }
}