// IPC 通道处理器
import { ipcMain, BrowserWindow, nativeTheme, dialog } from 'electron'
import store, { type ConnectionConfig } from './store'
import { encrypt, decrypt } from './credential'
import * as redis from './redis'

// Helper: wrap handler with command logging
function withLog(cmd: string, fn: (...args: any[]) => any) {
  return async (_e: any, ...args: any[]) => {
    const start = Date.now()
    const connId = args[0] || 'unknown'
    try {
      const result = await fn(_e, ...args)
      redis.log(connId, cmd, Date.now() - start)
      return result
    } catch (err) {
      redis.log(connId, cmd, Date.now() - start)
      throw err
    }
  }
}

export function registerIpcHandlers(): void {
  // Window
  ipcMain.on('window:minimize', () => BrowserWindow.getFocusedWindow()?.minimize())
  ipcMain.on('window:maximize', () => {
    const win = BrowserWindow.getFocusedWindow()
    if (win) win.isMaximized() ? win.unmaximize() : win.maximize()
  })
  ipcMain.on('window:close', () => BrowserWindow.getFocusedWindow()?.close())

  // Theme
  ipcMain.handle('theme:get', () => nativeTheme.shouldUseDarkColors)
  ipcMain.on('theme:set', (_e, theme: 'system' | 'dark' | 'light') => {
    nativeTheme.themeSource = theme
  })

  // Dialog
  ipcMain.handle('dialog:openFile', async (_e, options: Electron.OpenDialogOptions) => {
    const win = BrowserWindow.getFocusedWindow()
    if (!win) return null
    const result = await dialog.showOpenDialog(win, options)
    if (result.canceled || result.filePaths.length === 0) return null
    const fs = await import('fs')
    try {
      return { path: result.filePaths[0], content: fs.readFileSync(result.filePaths[0], 'utf-8') }
    } catch { return null }
  })

  // Credential
  ipcMain.handle('credential:encrypt', (_e, text: string) => encrypt(text))
  ipcMain.handle('credential:decrypt', (_e, encoded: string) => decrypt(encoded))

  // Storage - connections
  ipcMain.handle('storage:getConnections', async () => {
    const connections = store.get('connections', [])
    // Decrypt sensitive fields
    for (const conn of connections) {
      if (conn.auth && conn.auth.startsWith('enc:')) {
        try { conn.auth = await decrypt(conn.auth.slice(4)) } catch { /* keep as-is */ }
      }
      if (conn.sshPassword && conn.sshPassword.startsWith('enc:')) {
        try { conn.sshPassword = await decrypt(conn.sshPassword.slice(4)) } catch { /* keep as-is */ }
      }
      if (conn.sshPassphrase && conn.sshPassphrase.startsWith('enc:')) {
        try { conn.sshPassphrase = await decrypt(conn.sshPassphrase.slice(4)) } catch { /* keep as-is */ }
      }
    }
    return connections
  })
  ipcMain.handle('storage:saveConnection', async (_e, conn: ConnectionConfig) => {
    // Encrypt sensitive fields before storing (create copy to avoid mutation)
    const encrypted: ConnectionConfig = { ...conn }
    if (encrypted.auth && !encrypted.auth.startsWith('enc:')) {
      encrypted.auth = 'enc:' + await encrypt(encrypted.auth)
    }
    if (encrypted.sshPassword && !encrypted.sshPassword.startsWith('enc:')) {
      encrypted.sshPassword = 'enc:' + await encrypt(encrypted.sshPassword)
    }
    if (encrypted.sshPassphrase && !encrypted.sshPassphrase.startsWith('enc:')) {
      encrypted.sshPassphrase = 'enc:' + await encrypt(encrypted.sshPassphrase)
    }

    const connections = store.get('connections', [])
    const idx = connections.findIndex((c: ConnectionConfig) => c.id === encrypted.id)
    if (idx >= 0) connections[idx] = encrypted
    else connections.push(encrypted)
    store.set('connections', connections)
    return connections
  })
  ipcMain.handle('storage:deleteConnection', (_e, id: string) => {
    const connections = store.get('connections', []).filter((c: ConnectionConfig) => c.id !== id)
    store.set('connections', connections)
    return connections
  })
  ipcMain.handle('storage:reorderConnections', (_e, ids: string[]) => {
    const connections = store.get('connections', [])
    const reordered = ids.map((id, i) => {
      const conn = connections.find((c: ConnectionConfig) => c.id === id)
      if (!conn) return null
      conn.order = i
      return conn
    }).filter((c): c is ConnectionConfig => c !== null)
    store.set('connections', reordered)
    return reordered
  })

  // Storage - settings
  ipcMain.handle('storage:getSettings', () => store.get('settings'))
  ipcMain.handle('storage:saveSettings', (_e, settings) => {
    store.set('settings', settings)
  })

  // Redis - 连接
  ipcMain.handle('redis:connect', async (_e, id: string, opts) => {
    try {
      await redis.connect(id, opts)
      return { success: true }
    } catch (err: any) {
      return { success: false, error: err.message }
    }
  })
  ipcMain.handle('redis:disconnect', async (_e, id: string) => {
    await redis.disconnect(id)
  })
  ipcMain.handle('redis:ping', async (_e, id: string) => {
    return redis.ping(id)
  })
  ipcMain.handle('redis:isConnected', (_e, id: string) => {
    return redis.isClientConnected(id)
  })

  // Blocked dangerous commands — blocked in redis:execute but allowed via redis:executeUnsafe (CLI)
  const BLOCKED_COMMANDS = new Set([
    'FLUSHALL', 'FLUSHDB', 'SHUTDOWN', 'DEBUG',
  ])

  // Redis - 服务器 (safe execute — blocks dangerous commands)
  ipcMain.handle('redis:execute', withLog('EXEC', async (_e, id: string, command: string, args: string[]) => {
    const cmdUpper = command.toUpperCase().split(/\s+/)[0]
    if (BLOCKED_COMMANDS.has(cmdUpper)) {
      throw new Error(`Command "${command}" is blocked for safety. Use CLI for administrative commands.`)
    }
    return redis.execute(id, command, args)
  }))

  // Redis - unsafe execute (bypasses block — for CLI use only)
  ipcMain.handle('redis:executeUnsafe', withLog('EXEC', async (_e, id: string, command: string, args: string[]) => {
    return redis.execute(id, command, args)
  }))
  ipcMain.handle('redis:getInfo', async (_e, id: string) => {
    return redis.getServerInfo(id)
  })
  ipcMain.handle('redis:selectDb', withLog('SELECT', async (_e, id: string, db: number) => {
    await redis.selectDb(id, db)
  }))
  ipcMain.handle('redis:dbSize', async (_e, id: string) => {
    return redis.dbSize(id)
  })
  ipcMain.handle('redis:slowLogGet', async (_e, id: string, count: number) => {
    return redis.slowLogGet(id, count)
  })
  ipcMain.handle('redis:slowLogLen', async (_e, id: string) => {
    return redis.slowLogLen(id)
  })

  // Redis - Key 操作
  ipcMain.handle('redis:scanKeys', async (_e, id: string, cursor: string, pattern: string, count: number) => {
    return redis.scanKeys(id, cursor, pattern, count)
  })
  ipcMain.handle('redis:getKeyType', async (_e, id: string, key: string) => {
    return redis.getKeyType(id, key)
  })
  ipcMain.handle('redis:getKeyTTL', async (_e, id: string, key: string) => {
    return redis.getKeyTTL(id, key)
  })
  ipcMain.handle('redis:setTTL', withLog('EXPIRE', async (_e, id: string, key: string, ttl: number) => {
    await redis.setKeyTTL(id, key, ttl)
  }))
  ipcMain.handle('redis:deleteKey', withLog('DEL', async (_e, id: string, key: string) => {
    await redis.deleteKey(id, key)
  }))
  ipcMain.handle('redis:renameKey', withLog('RENAME', async (_e, id: string, oldKey: string, newKey: string) => {
    await redis.renameKey(id, oldKey, newKey)
  }))
  ipcMain.handle('redis:existsKey', async (_e, id: string, key: string) => {
    return redis.existsKey(id, key)
  })
  ipcMain.handle('redis:batchDelete', withLog('DEL batch', async (_e, id: string, keys: string[]) => {
    return redis.batchDelete(id, keys)
  }))
  ipcMain.handle('redis:memoryUsage', async (_e, id: string, key: string) => {
    return redis.memoryUsage(id, key)
  })
  ipcMain.handle('redis:batchMemoryUsage', async (_e, id: string, keys: string[]) => {
    return redis.batchKeyMemoryUsage(id, keys)
  })

  // Redis - String
  ipcMain.handle('redis:getString', async (_e, id: string, key: string) => {
    return redis.getStringValue(id, key)
  })
  ipcMain.handle('redis:setString', withLog('SET', async (_e, id: string, key: string, value: string) => {
    await redis.setStringValue(id, key, value)
  }))

  // ReJson
  ipcMain.handle('redis:rejsonGet', async (_e, id: string, key: string, path: string) => {
    return redis.rejsonGet(id, key, path)
  })
  ipcMain.handle('redis:rejsonSet', withLog('JSON.SET', async (_e, id: string, key: string, path: string, value: string) => {
    await redis.rejsonSet(id, key, path, value)
  }))

  // Redis - Hash
  ipcMain.handle('redis:hashScan', async (_e, id: string, key: string, cursor: string, count: number) => {
    return redis.getHashFields(id, key, cursor, count)
  })
  ipcMain.handle('redis:hashSet', withLog('HSET', async (_e, id: string, key: string, field: string, value: string) => {
    await redis.setHashField(id, key, field, value)
  }))
  ipcMain.handle('redis:hashDel', withLog('HDEL', async (_e, id: string, key: string, field: string) => {
    await redis.deleteHashField(id, key, field)
  }))

  // Redis - List
  ipcMain.handle('redis:listRange', async (_e, id: string, key: string, start: number, stop: number) => {
    return redis.listRange(id, key, start, stop)
  })
  ipcMain.handle('redis:listLength', async (_e, id: string, key: string) => {
    return redis.listLength(id, key)
  })
  ipcMain.handle('redis:listPush', withLog('RPUSH', async (_e, id: string, key: string, values: string[]) => {
    return redis.listPush(id, key, ...values)
  }))
  ipcMain.handle('redis:listSet', withLog('LSET', async (_e, id: string, key: string, index: number, value: string) => {
    await redis.listSet(id, key, index, value)
  }))
  ipcMain.handle('redis:listRemove', withLog('LREM', async (_e, id: string, key: string, count: number, value: string) => {
    return redis.listRemove(id, key, count, value)
  }))

  // Redis - Set
  ipcMain.handle('redis:setMembers', async (_e, id: string, key: string) => {
    return redis.setMembers(id, key)
  })
  ipcMain.handle('redis:setSize', async (_e, id: string, key: string) => {
    return redis.setSize(id, key)
  })
  ipcMain.handle('redis:setAdd', withLog('SADD', async (_e, id: string, key: string, members: string[]) => {
    return redis.setAdd(id, key, ...members)
  }))
  ipcMain.handle('redis:setRemove', withLog('SREM', async (_e, id: string, key: string, members: string[]) => {
    return redis.setRemove(id, key, ...members)
  }))

  // Redis - Zset
  ipcMain.handle('redis:zsetRange', async (_e, id: string, key: string, start: number, stop: number, withScores: boolean) => {
    return redis.zsetRange(id, key, start, stop, withScores)
  })
  ipcMain.handle('redis:zsetSize', async (_e, id: string, key: string) => {
    return redis.zsetSize(id, key)
  })
  ipcMain.handle('redis:zsetAdd', withLog('ZADD', async (_e, id: string, key: string, score: number, member: string) => {
    return redis.zsetAdd(id, key, score, member)
  }))
  ipcMain.handle('redis:zsetRemove', withLog('ZREM', async (_e, id: string, key: string, members: string[]) => {
    return redis.zsetRemove(id, key, ...members)
  }))

  // Redis - Stream
  ipcMain.handle('redis:streamInfo', async (_e, id: string, key: string) => {
    return redis.streamInfo(id, key)
  })
  ipcMain.handle('redis:streamRange', async (_e, id: string, key: string, start: string, end: string, count: number) => {
    return redis.streamRange(id, key, start, end, count)
  })
  ipcMain.handle('redis:streamAdd', withLog('XADD', async (_e, id: string, key: string, streamId: string, fieldValues: string[]) => {
    return redis.streamAdd(id, key, streamId, fieldValues)
  }))
  ipcMain.handle('redis:streamTrim', withLog('XTRIM', async (_e, id: string, key: string, maxLen: number) => {
    return redis.streamTrim(id, key, maxLen)
  }))
  ipcMain.handle('redis:streamDel', withLog('XDEL', async (_e, id: string, key: string, ids: string[]) => {
    return redis.streamDel(id, key, ...ids)
  }))

  // Redis - Stream Consumer Groups
  ipcMain.handle('redis:streamGroups', async (_e, id: string, key: string) => {
    return redis.streamGroups(id, key)
  })
  ipcMain.handle('redis:streamConsumers', async (_e, id: string, key: string, group: string) => {
    return redis.streamConsumers(id, key, group)
  })
  ipcMain.handle('redis:streamGroupCreate', withLog('XGROUP CREATE', async (_e, id: string, key: string, group: string, startId: string, mkstream: boolean) => {
    return redis.streamGroupCreate(id, key, group, startId, mkstream)
  }))
  ipcMain.handle('redis:streamGroupDestroy', withLog('XGROUP DESTROY', async (_e, id: string, key: string, group: string) => {
    return redis.streamGroupDestroy(id, key, group)
  }))
  ipcMain.handle('redis:streamAck', withLog('XACK', async (_e, id: string, key: string, group: string, ids: string[]) => {
    return redis.streamAck(id, key, group, ...ids)
  }))

  // Command Log
  ipcMain.handle('redis:getCommandLog', () => {
    return redis.getLog()
  })
  ipcMain.handle('redis:clearCommandLog', () => {
    redis.clearLog()
  })

  // Format decode
  ipcMain.handle('redis:decodeValue', (_e, value: string, format: string) => {
    return redis.decodeValue(value, format as any)
  })
  ipcMain.handle('redis:detectFormat', (_e, value: string) => {
    return redis.detectFormat(value)
  })
  ipcMain.handle('redis:customFormat', (_e, value: string, command: string, key: string) => {
    return redis.customFormat(value, command, key)
  })

  // Pub/Sub
  ipcMain.handle('redis:subscribe', async (_e, id: string, channels: string[], isPattern: boolean) => {
    try {
      redis.startSubscribe(id, channels, isPattern, _e.sender)
      return { success: true }
    } catch (err: any) {
      return { success: false, error: err.message }
    }
  })
  ipcMain.handle('redis:unsubscribe', async (_e, id: string) => {
    redis.stopSubscribe(id)
  })

  // Monitor
  ipcMain.handle('redis:monitor', async (_e, id: string) => {
    try {
      redis.startMonitor(id, _e.sender)
      return { success: true }
    } catch (err: any) {
      return { success: false, error: err.message }
    }
  })
  ipcMain.handle('redis:monitorStop', async (_e, id: string) => {
    redis.stopMonitor(id)
  })
}