/**
 * 存档系统 - 保存、加载、重置游戏数据
 * Phase 7 核心实现
 */

import { resetSkillSystem } from './skillSystem.js'

// 存档版本（用于版本控制和迁移）
const SAVE_VERSION = 1
const SAVE_KEY = 'wwa3_save_data'

/**
 * 保存游戏数据
 * @param {Object} gameStore - 游戏Store
 * @param {Object} playerStore - 玩家Store
 * @returns {boolean} 是否保存成功
 */
export function saveGame(gameStore, playerStore) {
  try {
    // 构建存档数据
    const saveData = {
      version: SAVE_VERSION,
      timestamp: Date.now(),
      player: serializePlayerData(playerStore),
      game: serializeGameData(gameStore)
    }

    // 使用uni.setStorageSync同步保存
    uni.setStorageSync(SAVE_KEY, JSON.stringify(saveData))

    console.log('Game saved successfully')
    return true
  } catch (error) {
    console.error('Failed to save game:', error)
    return false
  }
}

/**
 * 加载游戏数据
 * @param {Object} gameStore - 游戏Store
 * @param {Object} playerStore - 玩家Store
 * @returns {Object} { success: boolean, isNewGame: boolean, version: number }
 */
export function loadGame(gameStore, playerStore) {
  try {
    // 读取存档
    const saveDataRaw = uni.getStorageSync(SAVE_KEY)

    if (!saveDataRaw) {
      console.log('No save data found, starting new game')
      return { success: false, isNewGame: true, version: 0 }
    }

    const saveData = JSON.parse(saveDataRaw)

    // 验证存档版本
    if (saveData.version > SAVE_VERSION) {
      console.warn('Save version is newer than game version')
      return { success: false, isNewGame: false, error: 'version_mismatch' }
    }

    // 应用存档数据
    applySaveData(gameStore, playerStore, saveData)

    console.log(`Game loaded successfully (version ${saveData.version})`)
    return { success: true, isNewGame: false, version: saveData.version }
  } catch (error) {
    console.error('Failed to load game:', error)
    return { success: false, isNewGame: true, error: error.message }
  }
}

/**
 * 重置游戏数据
 * @param {Object} gameStore - 游戏Store
 * @param {Object} playerStore - 玩家Store
 * @returns {boolean} 是否重置成功
 */
export function resetGame(gameStore, playerStore) {
  try {
    // 重置玩家数据
    playerStore.$reset?.() || resetPlayerData(playerStore)

    // 重置游戏数据
    gameStore.$reset?.() || resetGameData(gameStore)

    // 删除存档
    uni.removeStorageSync(SAVE_KEY)

    console.log('Game reset successfully')
    return true
  } catch (error) {
    console.error('Failed to reset game:', error)
    return false
  }
}

/**
 * 应用存档数据到Store
 * @param {Object} gameStore - 游戏Store
 * @param {Object} playerStore - 玩家Store
 * @param {Object} saveData - 存档数据
 */
export function applySaveData(gameStore, playerStore, saveData) {
  // 应用玩家数据
  if (saveData.player) {
    applyPlayerData(playerStore, saveData.player)
  }

  // 应用游戏数据
  if (saveData.game) {
    applyGameData(gameStore, saveData.game)
  }

  // 版本迁移（如果需要）
  if (saveData.version < SAVE_VERSION) {
    migrateSaveData(saveData.version, SAVE_VERSION, gameStore, playerStore)
  }
}

/**
 * 序列化玩家数据
 * @param {Object} playerStore - 玩家Store
 * @returns {Object} 序列化的数据
 */
function serializePlayerData(playerStore) {
  return {
    baseStats: { ...playerStore.baseStats },
    currentStats: { ...playerStore.currentStats },
    level: { ...playerStore.level },
    skills: JSON.parse(JSON.stringify(playerStore.skills || {})),
    equipment: JSON.parse(JSON.stringify(playerStore.equipment || {})),
    inventory: JSON.parse(JSON.stringify(playerStore.inventory || [])),
    currency: { ...playerStore.currency },
    currentLocation: playerStore.currentLocation,
    flags: { ...playerStore.flags },
    // 额外数据
    milestoneBonuses: playerStore.milestoneBonuses ? JSON.parse(JSON.stringify(playerStore.milestoneBonuses)) : {},
    globalBonus: playerStore.globalBonus ? { ...playerStore.globalBonus } : null,
    equipmentStats: playerStore.equipmentStats ? { ...playerStore.equipmentStats } : null,
    killCount: playerStore.killCount ? { ...playerStore.killCount } : {}
  }
}

/**
 * 序列化游戏数据
 * @param {Object} gameStore - 游戏Store
 * @returns {Object} 序列化的数据
 */
function serializeGameData(gameStore) {
  return {
    currentTab: gameStore.currentTab,
    gameTime: { ...gameStore.gameTime },
    activeTasks: JSON.parse(JSON.stringify(gameStore.activeTasks || [])),
    negativeStatus: JSON.parse(JSON.stringify(gameStore.negativeStatus || [])),
    marketPrices: JSON.parse(JSON.stringify(gameStore.marketPrices || {})),
    autoCombat: gameStore.autoCombat || false,  // 保存自动战斗状态
    // 不保存日志（logs不持久化）
    // 不保存战斗状态（重新登录时退出战斗）
    // 不保存当前事件（重新登录时清除）
    scheduledEvents: JSON.parse(JSON.stringify(gameStore.scheduledEvents || []))
  }
}

/**
 * 应用玩家数据
 * @param {Object} playerStore - 玩家Store
 * @param {Object} data - 序列化的玩家数据
 */
function applyPlayerData(playerStore, data) {
  // 基础属性
  if (data.baseStats) {
    Object.assign(playerStore.baseStats, data.baseStats)
  }

  // 当前资源
  if (data.currentStats) {
    Object.assign(playerStore.currentStats, data.currentStats)
  }

  // 等级
  if (data.level) {
    Object.assign(playerStore.level, data.level)
  }

  // 技能
  if (data.skills) {
    playerStore.skills = JSON.parse(JSON.stringify(data.skills))
  }

  // 装备
  if (data.equipment) {
    playerStore.equipment = JSON.parse(JSON.stringify(data.equipment))
  }

  // 背包
  if (data.inventory) {
    playerStore.inventory = JSON.parse(JSON.stringify(data.inventory))
  }

  // 货币
  if (data.currency) {
    Object.assign(playerStore.currency, data.currency)
  }

  // 位置
  if (data.currentLocation !== undefined) {
    playerStore.currentLocation = data.currentLocation
  }

  // 标志
  if (data.flags) {
    Object.assign(playerStore.flags, data.flags)
  }

  // 额外数据
  if (data.milestoneBonuses) {
    playerStore.milestoneBonuses = JSON.parse(JSON.stringify(data.milestoneBonuses))
  }

  if (data.globalBonus) {
    playerStore.globalBonus = { ...data.globalBonus }
  }

  if (data.equipmentStats) {
    playerStore.equipmentStats = { ...data.equipmentStats }
  }

  if (data.killCount) {
    playerStore.killCount = { ...data.killCount }
  }
}

/**
 * 应用游戏数据
 * @param {Object} gameStore - 游戏Store
 * @param {Object} data - 序列化的游戏数据
 */
function applyGameData(gameStore, data) {
  // 当前标签
  if (data.currentTab !== undefined) {
    gameStore.currentTab = data.currentTab
  }

  // 游戏时间
  if (data.gameTime) {
    Object.assign(gameStore.gameTime, data.gameTime)
  }

  // 活动任务
  if (data.activeTasks) {
    gameStore.activeTasks = JSON.parse(JSON.stringify(data.activeTasks))
  }

  // 负面状态
  if (data.negativeStatus) {
    gameStore.negativeStatus = JSON.parse(JSON.stringify(data.negativeStatus))
  }

  // 市场价格
  if (data.marketPrices) {
    gameStore.marketPrices = JSON.parse(JSON.stringify(data.marketPrices))
  }

  // 自动战斗状态
  if (data.autoCombat !== undefined) {
    gameStore.autoCombat = data.autoCombat
  }

  // 定时事件
  if (data.scheduledEvents) {
    gameStore.scheduledEvents = JSON.parse(JSON.stringify(data.scheduledEvents))
  }

  // 清除不持久化的状态
  gameStore.logs = []
  gameStore.inCombat = false
  gameStore.combatState = null
  gameStore.currentEvent = null
}

/**
 * 重置玩家数据
 * @param {Object} playerStore - 玩家Store
 */
function resetPlayerData(playerStore) {
  // 基础属性
  playerStore.baseStats = {
    strength: 10,
    agility: 8,
    dexterity: 8,
    intuition: 10,
    vitality: 10
  }

  // 当前资源
  playerStore.currentStats = {
    health: 100,
    maxHealth: 100,
    stamina: 100,
    maxStamina: 100,
    sanity: 100,
    maxSanity: 100
  }

  // 等级
  playerStore.level = {
    current: 1,
    exp: 0,
    maxExp: 100
  }

  // 技能
  playerStore.skills = {}

  // 装备
  playerStore.equipment = {
    weapon: null,
    armor: null,
    shield: null,
    accessory: null
  }

  // 背包
  playerStore.inventory = []

  // 货币
  playerStore.currency = { copper: 0 }

  // 位置
  playerStore.currentLocation = 'camp'

  // 标志
  playerStore.flags = {}

  // 清空额外数据
  resetSkillSystem(playerStore)
  delete playerStore.equipmentStats
  delete playerStore.killCount
}

/**
 * 重置游戏数据
 * @param {Object} gameStore - 游戏Store
 */
function resetGameData(gameStore) {
  gameStore.currentTab = 'status'
  gameStore.drawerState = {
    inventory: false,
    event: false
  }
  gameStore.logs = []
  gameStore.gameTime = {
    day: 1,
    hour: 8,
    minute: 0,
    totalMinutes: 480
  }
  gameStore.inCombat = false
  gameStore.combatState = null
  gameStore.activeTasks = []
  gameStore.negativeStatus = []
  gameStore.marketPrices = {
    lastRefreshDay: 1,
    prices: {}
  }
  gameStore.currentEvent = null
  gameStore.scheduledEvents = []
}

/**
 * 版本迁移
 * @param {Number} fromVersion - 源版本
 * @param {Number} toVersion - 目标版本
 * @param {Object} gameStore - 游戏Store
 * @param {Object} playerStore - 玩家Store
 */
function migrateSaveData(fromVersion, toVersion, gameStore, playerStore) {
  console.log(`Migrating save from v${fromVersion} to v${toVersion}`)

  // 版本1暂无迁移需求
  // 未来版本可以在这里添加迁移逻辑

  console.log('Save migration completed')
}

/**
 * 检查是否存在存档
 * @returns {boolean}
 */
export function hasSaveData() {
  try {
    const saveData = uni.getStorageSync(SAVE_KEY)
    return !!saveData
  } catch (error) {
    return false
  }
}

/**
 * 获取存档信息
 * @returns {Object|null} 存档信息
 */
export function getSaveInfo() {
  try {
    const saveDataRaw = uni.getStorageSync(SAVE_KEY)
    if (!saveDataRaw) return null

    const saveData = JSON.parse(saveDataRaw)
    return {
      version: saveData.version,
      timestamp: saveData.timestamp,
      playTime: saveData.timestamp,
      gameTime: saveData.game?.gameTime
    }
  } catch (error) {
    return null
  }
}

/**
 * 导出存档（字符串）
 * @param {Object} gameStore - 游戏Store
 * @param {Object} playerStore - 玩家Store
 * @returns {string|null} 存档字符串
 */
export function exportSave(gameStore, playerStore) {
  try {
    const saveData = {
      version: SAVE_VERSION,
      timestamp: Date.now(),
      player: serializePlayerData(playerStore),
      game: serializeGameData(gameStore)
    }
    return JSON.stringify(saveData)
  } catch (error) {
    console.error('Failed to export save:', error)
    return null
  }
}

/**
 * 导入存档（从字符串）
 * @param {Object} gameStore - 游戏Store
 * @param {Object} playerStore - 玩家Store
 * @param {string} saveString - 存档字符串
 * @returns {boolean} 是否成功
 */
export function importSave(gameStore, playerStore, saveString) {
  try {
    const saveData = JSON.parse(saveString)

    // 验证格式
    if (!saveData.version || !saveData.player || !saveData.game) {
      return false
    }

    // 应用存档
    applySaveData(gameStore, playerStore, saveData)

    // 保存到本地
    uni.setStorageSync(SAVE_KEY, saveString)

    return true
  } catch (error) {
    console.error('Failed to import save:', error)
    return false
  }
}