// electron/modules/logger.ts - 日志模块 (基于 electron-log)

import log from 'electron-log/main'
import * as path from 'path'
import * as fs from 'fs'
import { app } from 'electron'
import type { LogEntry, LogCategory } from './types'

// 日志配置常量
const MAX_LOG_FILE_SIZE = 5 * 1024 * 1024 // 5MB
const DEFAULT_MAX_FILES = 3
const DEFAULT_MAX_RECENT_LOGS = 500

// 日志实例
let appLog: ReturnType<typeof log.create> | null = null
let installLog: ReturnType<typeof log.create> | null = null

class Logger {
  private recentLogs: LogEntry[] = []
  private maxRecentLogs = DEFAULT_MAX_RECENT_LOGS
  private logDir: string = ''
  private initialized = false

  init(): void {
    if (this.initialized) return
    this.initialized = true

    // 日志目录设置 - 统一使用 Electron 推荐的用户数据目录
    // Windows: C:\Users\用户名\AppData\Roaming\claude-ai-installer\logs
    const userDataDir = app.getPath('userData')
    console.log('[Logger] 使用用户数据目录:', userDataDir)
    this.logDir = path.join(userDataDir, 'logs')

    // 确保日志目录存在
    console.log('[Logger] 尝试创建日志目录:', this.logDir)
    try {
      if (!fs.existsSync(this.logDir)) {
        fs.mkdirSync(this.logDir, { recursive: true })
        console.log('[Logger] 日志目录创建成功')
      } else {
        console.log('[Logger] 日志目录已存在')
      }
    } catch (err) {
      console.error('[Logger] 创建日志目录失败:', err)
    }

    // 保存日志目录路径供 resolvePathFn 使用
    const logDir = this.logDir

    // 创建应用日志实例
    console.log('[Logger] 创建 appLog 实例...')
    appLog = log.create({ logId: 'app' })
    const appLogPath = path.join(logDir, 'app.log')
    appLog.transports.file.resolvePathFn = () => appLogPath
    appLog.transports.file.level = 'debug'
    appLog.transports.file.maxSize = MAX_LOG_FILE_SIZE
    appLog.transports.file.format = '[{y}-{m}-{d} {h}:{i}:{s}.{ms}] [{level}] {text}'
    appLog.transports.file.archiveLogFn = (file) => this.archiveLog(file)
    appLog.transports.console.level = 'debug'
    appLog.transports.console.format = '[{y}-{m}-{d} {h}:{i}:{s}] [{level}] {text}'
    console.log('[Logger] appLog 配置完成，路径:', appLogPath)

    // 创建安装日志实例
    console.log('[Logger] 创建 installLog 实例...')
    installLog = log.create({ logId: 'install' })
    const installLogPath = path.join(logDir, 'install.log')
    installLog.transports.file.resolvePathFn = () => installLogPath
    installLog.transports.file.level = 'debug'
    installLog.transports.file.maxSize = MAX_LOG_FILE_SIZE
    installLog.transports.file.format = '[{y}-{m}-{d} {h}:{i}:{s}.{ms}] [{level}] {text}'
    installLog.transports.file.archiveLogFn = (file) => this.archiveLog(file)
    installLog.transports.console.level = 'debug'
    installLog.transports.console.format = '[{y}-{m}-{d} {h}:{i}:{s}] [{level}] {text}'
    console.log('[Logger] installLog 配置完成，路径:', installLogPath)

    // 写入初始化日志
    this.info('日志系统初始化完成', { logDir: this.logDir })
    this.installInfo('安装日志系统初始化完成', { logDir: this.logDir })
  }

  /**
   * 日志文件轮转
   */
  private archiveLog(file: { path: string; toString: () => string }): void {
    const filePath = file.toString()
    const info = path.parse(filePath)

    // 删除最旧的轮转文件
    for (let i = DEFAULT_MAX_FILES; i >= 1; i--) {
      const oldFile = path.join(info.dir, `${info.name}.${i}${info.ext}`)
      const newFile = path.join(info.dir, `${info.name}.${i + 1}${info.ext}`)
      try {
        if (fs.existsSync(oldFile)) {
          if (i === DEFAULT_MAX_FILES) {
            fs.unlinkSync(oldFile)
          } else {
            fs.renameSync(oldFile, newFile)
          }
        }
      } catch {
        // 忽略轮转错误
      }
    }

    // 重命名当前日志文件
    try {
      fs.renameSync(filePath, path.join(info.dir, `${info.name}.1${info.ext}`))
    } catch {
      // 忽略重命名错误
    }
  }

  getLogDir(): string {
    return this.logDir
  }

  getAppLogPath(): string {
    return path.join(this.logDir, 'app.log')
  }

  getInstallLogPath(): string {
    return path.join(this.logDir, 'install.log')
  }

  private addToRecent(level: LogEntry['level'], message: string, category: LogCategory, data?: unknown): void {
    const entry: LogEntry = {
      level,
      message,
      timestamp: new Date().toISOString(),
      category,
      data
    }
    this.recentLogs.push(entry)
    if (this.recentLogs.length > this.maxRecentLogs) {
      this.recentLogs.shift()
    }
  }

  // ==================== 应用日志方法 ====================

  debug(message: string, data?: unknown): void {
    if (appLog) {
      if (data !== undefined) {
        appLog.debug(message, data)
      } else {
        appLog.debug(message)
      }
    } else {
      console.debug('[Logger]', message, data ?? '')
    }
    this.addToRecent('DEBUG', message, 'app', data)
  }

  info(message: string, data?: unknown): void {
    if (appLog) {
      if (data !== undefined) {
        appLog.info(message, data)
      } else {
        appLog.info(message)
      }
    } else {
      console.info('[Logger]', message, data ?? '')
    }
    this.addToRecent('INFO', message, 'app', data)
  }

  warn(message: string, data?: unknown): void {
    if (appLog) {
      if (data !== undefined) {
        appLog.warn(message, data)
      } else {
        appLog.warn(message)
      }
    } else {
      console.warn('[Logger]', message, data ?? '')
    }
    this.addToRecent('WARN', message, 'app', data)
  }

  error(message: string, data?: unknown): void {
    if (appLog) {
      if (data !== undefined) {
        appLog.error(message, data)
      } else {
        appLog.error(message)
      }
    } else {
      console.error('[Logger]', message, data ?? '')
    }
    this.addToRecent('ERROR', message, 'app', data)
  }

  // ==================== 安装日志方法 ====================

  installDebug(message: string, data?: unknown): void {
    if (installLog) {
      if (data !== undefined) {
        installLog.debug(message, data)
      } else {
        installLog.debug(message)
      }
    } else {
      console.debug('[InstallLog]', message, data ?? '')
    }
    this.addToRecent('DEBUG', message, 'install', data)
  }

  installInfo(message: string, data?: unknown): void {
    if (installLog) {
      if (data !== undefined) {
        installLog.info(message, data)
      } else {
        installLog.info(message)
      }
    } else {
      console.info('[InstallLog]', message, data ?? '')
    }
    this.addToRecent('INFO', message, 'install', data)
  }

  installWarn(message: string, data?: unknown): void {
    if (installLog) {
      if (data !== undefined) {
        installLog.warn(message, data)
      } else {
        installLog.warn(message)
      }
    } else {
      console.warn('[InstallLog]', message, data ?? '')
    }
    this.addToRecent('WARN', message, 'install', data)
  }

  installError(message: string, data?: unknown): void {
    if (installLog) {
      if (data !== undefined) {
        installLog.error(message, data)
      } else {
        installLog.error(message)
      }
    } else {
      console.error('[InstallLog]', message, data ?? '')
    }
    this.addToRecent('ERROR', message, 'install', data)
  }

  // ==================== 日志查询方法 ====================

  getRecentLogs(limit = 200, category?: LogCategory): LogEntry[] {
    if (category) {
      return this.recentLogs.filter(log => log.category === category).slice(-limit)
    }
    return this.recentLogs.slice(-limit)
  }

  close(): void {
    this.recentLogs = []
  }
}

export const logger = new Logger()
export default logger