/**
 * 游戏循环系统 - 主循环、时间推进、战斗处理、市场刷新
 * Phase 7 核心实现
 */

import { GAME_CONSTANTS } from '@/config/constants.js'
import { ITEM_CONFIG } from '@/config/items.js'
import { SKILL_CONFIG } from '@/config/skills.js'
import { ENEMY_CONFIG } from '@/config/enemies.js'
import { combatTick, initCombat, getEnvironmentType } from './combatSystem.js'
import { processTaskTick } from './taskSystem.js'
import { processEnvironmentExp, processEnvironmentEffects } from './environmentSystem.js'
import { checkScheduledEvents } from './eventSystem.js'
import { addSkillExp } from './skillSystem.js'
import { addItemToInventory } from './itemSystem.js'

// 游戏循环定时器
let gameLoopInterval = null
let isLoopRunning = false

// 离线时间记录
let lastSaveTime = Date.now()

/**
 * 启动游戏循环
 * @param {Object} gameStore - 游戏Store
 * @param {Object} playerStore - 玩家Store
 * @returns {boolean} 是否成功启动
 */
export function startGameLoop(gameStore, playerStore) {
  if (isLoopRunning) {
    console.warn('Game loop is already running')
    return false
  }

  // 每秒执行一次游戏tick
  gameLoopInterval = setInterval(() => {
    gameTick(gameStore, playerStore)
  }, 1000)

  isLoopRunning = true
  console.log('Game loop started')
  return true
}

/**
 * 停止游戏循环
 * @returns {boolean} 是否成功停止
 */
export function stopGameLoop() {
  if (!isLoopRunning) {
    return false
  }

  if (gameLoopInterval) {
    clearInterval(gameLoopInterval)
    gameLoopInterval = null
  }

  isLoopRunning = false
  console.log('Game loop stopped')
  return true
}

/**
 * 检查游戏循环是否运行中
 * @returns {boolean}
 */
export function isGameLoopRunning() {
  return isLoopRunning
}

/**
 * 游戏主tick - 每秒执行一次
 * @param {Object} gameStore - 游戏Store
 * @param {Object} playerStore - 玩家Store
 */
export function gameTick(gameStore, playerStore) {
  // 1. 更新游戏时间
  updateGameTime(gameStore)

  // 2. 处理战斗
  if (gameStore.inCombat && gameStore.combatState) {
    handleCombatTick(gameStore, playerStore)
  }

  // 3. 处理任务
  if (gameStore.activeTasks && gameStore.activeTasks.length > 0) {
    const completedTasks = processTaskTick(gameStore, playerStore, 1000)

    // 处理完成的任务奖励
    for (const { task, rewards } of completedTasks) {
      handleTaskCompletion(gameStore, playerStore, task, rewards)
    }
  }

  // 4. 处理环境经验
  processEnvironmentExp(
    gameStore,
    playerStore,
    playerStore.currentLocation,
    1
  )

  // 5. 处理环境负面效果
  processEnvironmentEffects(
    playerStore,
    playerStore.currentLocation,
    1
  )

  // 6. 检查定时事件
  checkScheduledEvents(gameStore, playerStore)

  // 7. 自动保存检查（每分钟保存一次）
  const currentTime = Date.now()
  if (currentTime - lastSaveTime >= 60000) {
    // 触发自动保存（由App.vue处理）
    lastSaveTime = currentTime
    if (gameStore.triggerAutoSave) {
      gameStore.triggerAutoSave()
    }
  }
}

/**
 * 更新游戏时间
 * 现实1秒 = 游戏时间5分钟
 * @param {Object} gameStore - 游戏Store
 */
export function updateGameTime(gameStore) {
  const { gameTime } = gameStore

  // 每秒增加5分钟
  gameTime.totalMinutes += GAME_CONSTANTS.TIME_SCALE

  // 计算天、时、分
  const minutesPerDay = 24 * 60
  const minutesPerHour = 60

  gameTime.day = Math.floor(gameTime.totalMinutes / minutesPerDay) + 1
  const dayMinutes = gameTime.totalMinutes % minutesPerDay
  gameTime.hour = Math.floor(dayMinutes / minutesPerHour)
  gameTime.minute = dayMinutes % minutesPerHour

  // 检查是否需要刷新市场价格（每天刷新一次）
  if (gameTime.hour === 0 && gameTime.minute === 0) {
    refreshMarketPrices(gameStore)
  }
}

/**
 * 处理战斗tick
 * @param {Object} gameStore - 游戏Store
 * @param {Object} playerStore - 玩家Store
 */
function handleCombatTick(gameStore, playerStore) {
  const result = combatTick(gameStore, playerStore, gameStore.combatState)

  // 添加战斗日志
  if (result.logs && result.logs.length > 0) {
    for (const log of result.logs) {
      if (typeof log === 'string') {
        gameStore.addLog(log, 'combat')
      } else if (log.message) {
        gameStore.addLog(log.message, log.type || 'combat')
      }
    }
  }

  // 处理战斗结果
  if (result.victory) {
    handleCombatVictory(gameStore, playerStore, result)
  } else if (result.defeat) {
    handleCombatDefeat(gameStore, playerStore, result)
  } else if (result.enemy) {
    // 更新敌人状态
    gameStore.combatState.enemy = result.enemy
    gameStore.combatState.ticks++
  }
}

/**
 * 处理战斗胜利
 * @param {Object} gameStore - 游戏Store
 * @param {Object} playerStore - 玩家Store
 * @param {Object} combatResult - 战斗结果
 */
export function handleCombatVictory(gameStore, playerStore, combatResult) {
  const { enemy } = combatResult

  // 结束战斗状态
  gameStore.inCombat = false
  gameStore.combatState = null

  // 添加日志
  gameStore.addLog(`战胜了 ${enemy.name}!`, 'reward')

  // 给予经验值
  if (enemy.expReward) {
    playerStore.level.exp += enemy.expReward

    // 检查升级
    const maxExp = playerStore.level.maxExp
    if (playerStore.level.exp >= maxExp) {
      playerStore.level.current++
      playerStore.level.exp -= maxExp
      playerStore.level.maxExp = Math.floor(playerStore.level.maxExp * 1.5)

      gameStore.addLog(`升级了! 等级: ${playerStore.level.current}`, 'reward')

      // 升级恢复状态
      playerStore.currentStats.health = playerStore.currentStats.maxHealth
      playerStore.currentStats.stamina = playerStore.currentStats.maxStamina
      playerStore.currentStats.sanity = playerStore.currentStats.maxSanity
    }
  }

  // 给予武器技能经验奖励
  if (enemy.skillExpReward && playerStore.equipment.weapon) {
    const weapon = playerStore.equipment.weapon
    // 根据武器ID确定技能ID
    let skillId = null
    if (weapon.id === 'wooden_stick') {
      skillId = 'stick_mastery'
    } else if (weapon.subtype === 'sword') {
      skillId = 'sword_mastery'
    } else if (weapon.subtype === 'axe') {
      skillId = 'axe_mastery'
    }

    if (skillId) {
      const result = addSkillExp(playerStore, skillId, enemy.skillExpReward)

      if (result.leveledUp) {
        const skillName = SKILL_CONFIG[skillId]?.name || skillId
        gameStore.addLog(`${skillName}升级到了 Lv.${result.newLevel}!`, 'reward')
      }
    }
  }

  // 处理掉落
  if (enemy.drops && enemy.drops.length > 0) {
    processDrops(gameStore, playerStore, enemy.drops)
  }

  // 触发战斗胜利事件
  gameStore.triggerEvent?.('combat', {
    result: 'victory',
    enemyId: enemy.id,
    enemy
  })

  // 自动战斗模式：战斗结束后继续寻找敌人
  if (gameStore.autoCombat) {
    // 检查玩家状态是否允许继续战斗
    const canContinue = playerStore.currentStats.health > 10 &&
                        playerStore.currentStats.stamina > 10

    if (canContinue) {
      // 延迟3秒后开始下一场战斗
      setTimeout(() => {
        if (!gameStore.inCombat && gameStore.autoCombat) {
          startAutoCombat(gameStore, playerStore)
        }
      }, 3000)
    } else {
      // 状态过低，自动关闭自动战斗
      gameStore.autoCombat = false
      gameStore.addLog('状态过低，自动战斗已停止', 'warning')
    }
  }
}

/**
 * 启动自动战斗（在当前位置寻找敌人）
 * @param {Object} gameStore - 游戏Store
 * @param {Object} playerStore - 玩家Store
 */
function startAutoCombat(gameStore, playerStore) {
  // 检查当前位置是否有敌人
  const locationId = playerStore.currentLocation
  const locationEnemies = LOCATION_ENEMIES[locationId]

  if (!locationEnemies || locationEnemies.length === 0) {
    gameStore.autoCombat = false
    gameStore.addLog('当前区域没有敌人，自动战斗已停止', 'info')
    return
  }

  // 随机选择一个敌人
  const enemyId = locationEnemies[Math.floor(Math.random() * locationEnemies.length)]
  const enemyConfig = ENEMY_CONFIG[enemyId]

  if (!enemyConfig) {
    gameStore.addLog('敌人配置错误', 'error')
    return
  }

  gameStore.addLog(`自动寻找中...遇到了 ${enemyConfig.name}!`, 'combat')
  const environment = getEnvironmentType(locationId)
  gameStore.combatState = initCombat(enemyId, enemyConfig, environment)
  gameStore.inCombat = true
}

// 当前区域的敌人配置
const LOCATION_ENEMIES = {
  wild1: ['wild_dog'],
  boss_lair: ['test_boss']
}

/**
 * 处理战斗失败
 * @param {Object} gameStore - 游戏Store
 * @param {Object} playerStore - 玩家Store
 * @param {Object} combatResult - 战斗结果
 */
export function handleCombatDefeat(gameStore, playerStore, combatResult) {
  // 结束战斗状态
  gameStore.inCombat = false
  gameStore.combatState = null

  // 添加日志
  gameStore.addLog('你被击败了...', 'error')

  // 惩罚：回到营地
  playerStore.currentLocation = 'camp'

  // 恢复部分状态（在营地）
  playerStore.currentStats.health = Math.floor(playerStore.currentStats.maxHealth * 0.3)
  playerStore.currentStats.stamina = Math.floor(playerStore.currentStats.maxStamina * 0.5)

  gameStore.addLog('你在营地醒来，损失了部分状态', 'info')

  // 触发战斗失败事件
  gameStore.triggerEvent?.('combat', {
    result: 'defeat'
  })
}

/**
 * 处理掉落物品
 * @param {Object} gameStore - 游戏Store
 * @param {Object} playerStore - 玩家Store
 * @param {Array} drops - 掉落列表
 */
function processDrops(gameStore, playerStore, drops) {
  for (const drop of drops) {
    // 检查掉落概率
    if (drop.chance && Math.random() > drop.chance) {
      continue
    }

    // 随机数量
    const count = drop.count
      ? drop.count.min + Math.floor(Math.random() * (drop.count.max - drop.count.min + 1))
      : 1

    // 添加物品
    const result = addItemToInventory(playerStore, drop.itemId, count)

    if (result.success) {
      const item = result.item
      gameStore.addLog(`获得了 ${item.name} x${count}`, 'reward')
    }
  }
}

/**
 * 处理任务完成
 * @param {Object} gameStore - 游戏Store
 * @param {Object} playerStore - 玩家Store
 * @param {Object} task - 完成的任务
 * @param {Object} rewards - 奖励
 */
function handleTaskCompletion(gameStore, playerStore, task, rewards) {
  // 应用货币奖励
  if (rewards.currency) {
    playerStore.currency.copper += rewards.currency
  }

  // 应用技能经验
  for (const [skillId, exp] of Object.entries(rewards)) {
    if (skillId !== 'currency' && skillId !== 'completionBonus' && typeof exp === 'number') {
      addSkillExp(playerStore, skillId, exp)
    }
  }

  // 添加完成日志
  const taskNames = {
    reading: '阅读',
    resting: '休息',
    training: '训练',
    working: '工作',
    praying: '祈祷'
  }
  gameStore.addLog(`${taskNames[task.type]}任务完成`, 'reward')
}

/**
 * 刷新市场价格
 * @param {Object} gameStore - 游戏Store
 */
export function refreshMarketPrices(gameStore) {
  const prices = {}

  // 为所有可交易物品生成新价格
  for (const [itemId, config] of Object.entries(ITEM_CONFIG)) {
    if (config.baseValue > 0 && config.type !== 'key') {
      // 价格波动范围：0.5 - 1.5倍
      const fluctuation = 0.5 + Math.random()
      prices[itemId] = {
        buyRate: fluctuation * 2,      // 购买价格倍率
        sellRate: fluctuation * 0.3    // 出售价格倍率
      }
    }
  }

  gameStore.marketPrices = {
    lastRefreshDay: gameStore.gameTime?.day || 1,
    prices
  }

  gameStore.addLog('市场价格已更新', 'info')
}

/**
 * 获取物品的当前市场价格
 * @param {Object} gameStore - 游戏Store
 * @param {String} itemId - 物品ID
 * @returns {Object} { buyPrice: number, sellPrice: number }
 */
export function getMarketPrice(gameStore, itemId) {
  const config = ITEM_CONFIG[itemId]
  if (!config || !config.baseValue) {
    return { buyPrice: 0, sellPrice: 0 }
  }

  const marketData = gameStore.marketPrices?.prices?.[itemId]
  const basePrice = config.baseValue

  if (marketData) {
    return {
      buyPrice: Math.floor(basePrice * marketData.buyRate),
      sellPrice: Math.floor(basePrice * marketData.sellRate)
    }
  }

  // 默认价格
  return {
    buyPrice: Math.floor(basePrice * 2),
    sellPrice: Math.floor(basePrice * 0.3)
  }
}

/**
 * 计算离线收益
 * @param {Object} gameStore - 游戏Store
 * @param {Object} playerStore - 玩家Store
 * @param {Number} offlineSeconds - 离线秒数
 * @returns {Object} 离线收益信息
 */
export function calculateOfflineEarnings(gameStore, playerStore, offlineSeconds) {
  const maxOfflineSeconds = 8 * 60 * 60  // 最多计算8小时
  const effectiveSeconds = Math.min(offlineSeconds, maxOfflineSeconds)

  const earnings = {
    time: effectiveSeconds,
    timeDisplay: formatOfflineTime(effectiveSeconds),
    skillExp: {},
    currency: 0
  }

  // 简化计算：基于离线时间给予少量技能经验
  // 假设玩家在离线期间进行了基础训练
  const baseExpRate = 0.1  // 每秒0.1经验
  const totalExp = Math.floor(baseExpRate * effectiveSeconds)

  // 将经验分配给已解锁的技能
  const unlockedSkills = Object.keys(playerStore.skills || {}).filter(
    skillId => playerStore.skills[skillId]?.unlocked
  )

  if (unlockedSkills.length > 0) {
    const expPerSkill = Math.floor(totalExp / unlockedSkills.length)
    for (const skillId of unlockedSkills) {
      earnings.skillExp[skillId] = expPerSkill
    }
  }

  // 离线货币收益（极少）
  earnings.currency = Math.floor(effectiveSeconds * 0.01)

  return earnings
}

/**
 * 应用离线收益
 * @param {Object} gameStore - 游戏Store
 * @param {Object} playerStore - 玩家Store
 * @param {Object} earnings - 离线收益
 */
export function applyOfflineEarnings(gameStore, playerStore, earnings) {
  // 应用技能经验
  for (const [skillId, exp] of Object.entries(earnings.skillExp)) {
    addSkillExp(playerStore, skillId, exp)
  }

  // 应用货币
  if (earnings.currency > 0) {
    playerStore.currency.copper += earnings.currency
  }

  // 添加日志
  gameStore.addLog(
    `离线 ${earnings.timeDisplay}，获得了一些经验`,
    'info'
  )
}

/**
 * 格式化离线时间
 * @param {Number} seconds - 秒数
 * @returns {String} 格式化的时间
 */
function formatOfflineTime(seconds) {
  const hours = Math.floor(seconds / 3600)
  const minutes = Math.floor((seconds % 3600) / 60)

  if (hours > 0) {
    return `${hours}小时${minutes}分钟`
  }
  return `${minutes}分钟`
}

/**
 * 更新最后保存时间
 */
export function updateLastSaveTime() {
  lastSaveTime = Date.now()
}

/**
 * 获取最后保存时间
 * @returns {Number} 时间戳
 */
export function getLastSaveTime() {
  return lastSaveTime
}