import { DEITIES } from '../data/deities.js'
import { TAROT_MAJOR_ARCANA } from '../data/tarot.js'
import { QUEST_TYPES, checkQuestProgress } from '../data/deity-quests.js'

export class DeitySystem {
    constructor(petSystem) {
        this.petSystem = petSystem
        this.state = {
            collectedDeities: [], // Array of { id, stageLevel, exp, quests: { questId: progress } }
            currentDeityId: null,
            lastEncounterTime: 0,
            dailyFortune: null // { type: 'jiaobei'|'stick'|'tarot', result: ... }
        }
    }

    // 保存狀態到 PetSystem (進而保存到 API/LocalStorage)
    async saveState() {
        if (this.petSystem && this.petSystem.updateState) {
            await this.petSystem.updateState({ deitySystemState: this.state })
        }
    }

    // 初始化
    async initialize(savedState) {
        if (savedState) {
            this.state = { ...this.state, ...savedState }
        }

        // 確保至少有一個默認神明 (媽祖)
        if (this.state.collectedDeities.length === 0) {
            this.collectDeity('mazu');
        }
    }

    // 獲取當前神明資料
    getCurrentDeity() {
        if (!this.state.currentDeityId) return null
        return DEITIES.find(d => d.id === this.state.currentDeityId)
    }

    // 獲取當前神明的狀態 (等級、經驗等)
    getCurrentDeityState() {
        if (!this.state.currentDeityId) return null
        return this.state.collectedDeities.find(d => d.id === this.state.currentDeityId)
    }

    // 獲取當前階段詳細資料
    getCurrentStage() {
        const deity = this.getCurrentDeity()
        const deityState = this.getCurrentDeityState()
        if (!deity || !deityState) return null

        return deity.stages.find(s => s.level === deityState.stageLevel)
    }

    // 遭遇神明 (隨機)
    triggerEncounter() {
        const now = Date.now()
        // 簡單的冷卻檢查 (例如 1 小時)
        if (now - this.state.lastEncounterTime < 3600000) return null

        // 隨機選擇一個未收集的神明
        const collectedIds = this.state.collectedDeities.map(d => d.id)
        const availableDeities = DEITIES.filter(d => !collectedIds.includes(d.id))

        if (availableDeities.length === 0) return null

        const randomDeity = availableDeities[Math.floor(Math.random() * availableDeities.length)]
        this.state.lastEncounterTime = now

        return randomDeity
    }

    // 嘗試邀請神明 (擲筊挑戰)
    // 這裡只負責邏輯，UI 負責顯示動畫
    // return: { success: boolean, cups: [boolean, boolean, boolean] } (true=聖杯)
    challengeInvite() {
        // 模擬擲筊 3 次
        const results = []
        let successCount = 0

        for (let i = 0; i < 3; i++) {
            // 聖杯機率 50% (一正一反)
            // 這裡簡化邏輯：0=笑杯/陰杯, 1=聖杯
            const isHolyCup = Math.random() > 0.5
            results.push(isHolyCup)
            if (isHolyCup) successCount++
        }

        // 連續 3 聖杯才算成功 (或者累積? 需求說是"三聖杯之後")
        // 通常"博杯"請神需要連續三聖杯
        const isSuccess = successCount === 3

        return { success: isSuccess, results }
    }

    // 收集神明
    collectDeity(deityId) {
        if (this.state.collectedDeities.some(d => d.id === deityId)) return false

        const deityConfig = DEITIES.find(d => d.id === deityId)
        if (!deityConfig) return false

        // 初始化神明狀態
        const newDeityState = {
            id: deityId,
            stageLevel: 1,
            exp: 0,
            quests: {} // 任務進度
        }

        // 初始化任務進度 (第一階段的任務)
        const firstStage = deityConfig.stages[0];
        if (firstStage?.quests) {
            firstStage.quests.forEach(q => {
                newDeityState.quests[q.id] = 0;
            });
        }

        this.state.collectedDeities.push(newDeityState)

        // 如果是第一個神明，自動設為當前
        if (!this.state.currentDeityId) {
            this.state.currentDeityId = deityId
        }

        this.saveState();
        return true
    }

    // 切換當前供奉神明
    switchDeity(deityId) {
        if (!this.state.collectedDeities.some(d => d.id === deityId)) return false
        this.state.currentDeityId = deityId
        this.saveState();
        return true
    }

    // 更新任務進度
    updateQuestProgress(actionType, value = 1) {
        const deityState = this.getCurrentDeityState();
        const deityConfig = this.getCurrentDeity();

        if (!deityState || !deityConfig) return [];

        // 獲取當前階段的任務（修正：從下一階段改為當前階段）
        const currentStage = deityConfig.stages.find(s => s.level === deityState.stageLevel);
        if (!currentStage || !currentStage.quests) return [];

        const updates = [];

        currentStage.quests.forEach(quest => {
            // 檢查是否已經完成
            if (deityState.quests[quest.id] >= quest.target) return;

            const oldProgress = deityState.quests[quest.id] || 0;
            const newProgress = checkQuestProgress(oldProgress, quest.target, actionType, quest.type, value);

            if (newProgress !== oldProgress) {
                deityState.quests[quest.id] = newProgress;
                updates.push({
                    questId: quest.id,
                    progress: newProgress,
                    target: quest.target,
                    completed: newProgress >= quest.target
                });
            }
        });

        if (updates.length > 0) {
            this.saveState();
        }

        return updates;
    }

    // 檢查是否可以進化
    canEvolve() {
        const deityState = this.getCurrentDeityState();
        const deityConfig = this.getCurrentDeity();
        if (!deityState || !deityConfig) return false;

        // 檢查是否已達最高級
        if (deityState.stageLevel >= deityConfig.stages.length) return false;

        // 檢查下一階需求（EXP）
        const nextStage = deityConfig.stages.find(s => s.level === deityState.stageLevel + 1);
        if (!nextStage) return false;

        // 檢查經驗值 (如果有)
        if (deityState.exp < nextStage.requiredExp) return false;

        // 檢查當前階段的所有任務是否完成（修正：檢查當前階段而非下一階段）
        const currentStage = deityConfig.stages.find(s => s.level === deityState.stageLevel);
        if (!currentStage || !currentStage.quests || currentStage.quests.length === 0) return true;

        const allQuestsCompleted = currentStage.quests.every(q => {
            return (deityState.quests[q.id] || 0) >= q.target;
        });

        return allQuestsCompleted;
    }

    // 進化
    evolve() {
        if (!this.canEvolve()) return false;

        const deityState = this.getCurrentDeityState();
        const deityConfig = this.getCurrentDeity();

        deityState.stageLevel += 1;

        // 初始化當前（剛進化到的）階段的任務
        const currentStage = deityConfig.stages.find(s => s.level === deityState.stageLevel);
        if (currentStage?.quests) {
            currentStage.quests.forEach(q => {
                if (!deityState.quests[q.id]) {
                    deityState.quests[q.id] = 0;
                }
            });
        }

        this.saveState();
        return true;
    }

    // 塔羅占卜
    drawTarot() {
        const cardIndex = Math.floor(Math.random() * TAROT_MAJOR_ARCANA.length)
        const card = TAROT_MAJOR_ARCANA[cardIndex]

        // 記錄今日運勢
        this.state.dailyFortune = {
            type: 'tarot',
            result: card,
            timestamp: Date.now()
        }

        this.saveState();
        return card
    }

    // 獲取當前生效的 Buffs
    getActiveBuffs() {
        const stage = this.getCurrentStage()
        if (!stage) return {}

        // 如果是最終階段，確保包含所有強力 Buff
        // 邏輯上 Stage 3 的 buffs 已經包含了所有需要的屬性
        return stage.buffs || {}
    }

    // 獲取狀態以供保存
    getState() {
        return this.state
    }
}