// src/renderer/src/stores/connection.ts
import { defineStore } from 'pinia'
import { ref, computed } from 'vue'

export interface ConnectionConfig {
  id: string
  name: string
  host: string
  port: number
  auth: string
  username: string
  tls: boolean
  tlsCaPath: string
  tlsCertPath: string
  tlsKeyPath: string
  tlsRejectUnauthorized: boolean
  sshEnabled: boolean
  sshHost: string
  sshPort: number
  sshUsername: string
  sshPassword: string
  sshPrivateKeyPath: string
  sshPassphrase: string
  cluster: boolean
  sentinelEnabled: boolean
  sentinelHost: string
  sentinelPort: number
  sentinelMasterName: string
  sentinelNodePassword: string
  separator: string
  order: number
  createdAt: number
  color?: string
}

export const useConnectionStore = defineStore('connection', () => {
  const connections = ref<ConnectionConfig[]>([])
  const activeId = ref<string | null>(null)
  const connectedIds = ref<string[]>([])
  const connecting = ref(false)
  const error = ref<string | null>(null)
  const serverInfoMap = ref<Record<string, string>>({})
  const healthMap = ref<Record<string, boolean>>({})
  const currentDb = ref<number>(0)
  const healthTimers = new Map<string, ReturnType<typeof setInterval>>()

  const activeConnection = computed(() =>
    connections.value.find((c: ConnectionConfig) => c.id === activeId.value) ?? null
  )
  const isConnected = computed(() => activeId.value !== null && connectedIds.value.includes(activeId.value))
  const serverInfo = computed(() => activeId.value ? serverInfoMap.value[activeId.value] ?? null : null)
  const healthOk = computed(() => activeId.value ? healthMap.value[activeId.value] ?? false : false)

  function isConnectedById(id: string): boolean {
    return connectedIds.value.includes(id)
  }

  async function loadConnections() {
    connections.value = await window.electronAPI.storage.getConnections()
  }

  async function decryptPassword(auth: string): Promise<string> {
    if (auth.startsWith('enc:')) {
      return await window.electronAPI.credential.decrypt(auth.slice(4))
    }
    return auth
  }

  async function saveConnection(conn: ConnectionConfig) {
    if (conn.auth && !conn.auth.startsWith('enc:')) {
      conn.auth = 'enc:' + await window.electronAPI.credential.encrypt(conn.auth)
    }
    connections.value = await window.electronAPI.storage.saveConnection(conn)
  }

  async function deleteConnection(id: string) {
    if (connectedIds.value.includes(id)) await disconnectById(id)
    connections.value = await window.electronAPI.storage.deleteConnection(id)
  }

  async function reorderConnections(ids: string[]) {
    connections.value = await window.electronAPI.storage.reorderConnections(ids)
  }

  async function connect(conn: ConnectionConfig) {
    // If already connected, just switch
    if (connectedIds.value.includes(conn.id)) {
      activeId.value = conn.id
      return
    }
    connecting.value = true
    error.value = null
    try {
      let auth = conn.auth
      if (auth.startsWith('enc:')) {
        auth = await window.electronAPI.credential.decrypt(auth.slice(4))
      }
      const result = await window.electronAPI.redis.connect(conn.id, {
        host: conn.host,
        port: conn.port,
        password: auth || undefined,
        username: conn.username || undefined,
        tls: conn.tls,
        tlsCaPath: conn.tlsCaPath,
        tlsCertPath: conn.tlsCertPath,
        tlsKeyPath: conn.tlsKeyPath,
        tlsRejectUnauthorized: conn.tlsRejectUnauthorized,
        sentinelEnabled: conn.sentinelEnabled,
        sentinelHost: conn.sentinelHost,
        sentinelPort: conn.sentinelPort,
        sentinelMasterName: conn.sentinelMasterName,
        sentinelNodePassword: conn.sentinelNodePassword,
        cluster: conn.cluster,
        sshEnabled: conn.sshEnabled,
        sshHost: conn.sshHost,
        sshPort: conn.sshPort,
        sshUsername: conn.sshUsername,
        sshPassword: conn.sshPassword,
        sshPrivateKeyPath: conn.sshPrivateKeyPath,
        sshPassphrase: conn.sshPassphrase,
      })
      if (result.success) {
        connectedIds.value.push(conn.id)
        activeId.value = conn.id
        serverInfoMap.value[conn.id] = await window.electronAPI.redis.getInfo(conn.id)
        startHealthCheck(conn.id)
      } else {
        error.value = result.error || 'Connection failed'
      }
    } catch (err: any) {
      error.value = err.message
    } finally {
      connecting.value = false
    }
  }

  function switchTo(id: string) {
    if (connectedIds.value.includes(id)) {
      activeId.value = id
    }
  }

  async function disconnectById(id: string) {
    stopHealthCheck(id)
    await window.electronAPI.redis.disconnect(id)
    connectedIds.value = connectedIds.value.filter(i => i !== id)
    delete serverInfoMap.value[id]
    delete healthMap.value[id]
    if (activeId.value === id) {
      activeId.value = connectedIds.value[0] ?? null
    }
  }

  async function disconnect() {
    if (activeId.value) {
      await disconnectById(activeId.value)
    }
  }

  async function getInfo(): Promise<string> {
    if (!activeId.value) return ''
    try {
      const info = await window.electronAPI.redis.getInfo(activeId.value)
      serverInfoMap.value[activeId.value] = info
      return info
    } catch {
      return ''
    }
  }

  function startHealthCheck(connId: string) {
    stopHealthCheck(connId)
    healthMap.value[connId] = true
    const timer = setInterval(async () => {
      try {
        const ok = await window.electronAPI.redis.isConnected(connId)
        healthMap.value[connId] = ok
        if (!ok && activeId.value === connId) {
          error.value = 'Connection lost'
        }
      } catch {
        healthMap.value[connId] = false
      }
    }, 5000)
    healthTimers.set(connId, timer)
  }

  function stopHealthCheck(connId?: string) {
    if (connId) {
      const timer = healthTimers.get(connId)
      if (timer) {
        clearInterval(timer)
        healthTimers.delete(connId)
      }
    } else {
      for (const [, timer] of healthTimers) {
        clearInterval(timer)
      }
      healthTimers.clear()
    }
  }

  async function testConnection(opts: {
    host: string; port: number; auth?: string; username?: string; tls?: boolean
    tlsCaPath?: string; tlsCertPath?: string; tlsKeyPath?: string; tlsRejectUnauthorized?: boolean
    sentinelEnabled?: boolean; sentinelHost?: string; sentinelPort?: number
    sentinelMasterName?: string; sentinelNodePassword?: string
    cluster?: boolean
    sshEnabled?: boolean; sshHost?: string; sshPort?: number; sshUsername?: string
    sshPassword?: string; sshPrivateKeyPath?: string; sshPassphrase?: string
  }): Promise<{ success: boolean; error?: string }> {
    if (!window.electronAPI) {
      return { success: false, error: 'Electron API not ready' }
    }
    const testId = `test_${Date.now()}`
    try {
      const result = await window.electronAPI.redis.connect(testId, {
        host: opts.host,
        port: opts.port,
        password: opts.auth || undefined,
        username: opts.username || undefined,
        tls: opts.tls,
        tlsCaPath: opts.tlsCaPath,
        tlsCertPath: opts.tlsCertPath,
        tlsKeyPath: opts.tlsKeyPath,
        tlsRejectUnauthorized: (opts as any).tlsRejectUnauthorized,
        sentinelEnabled: opts.sentinelEnabled,
        sentinelHost: opts.sentinelHost,
        sentinelPort: opts.sentinelPort,
        sentinelMasterName: opts.sentinelMasterName,
        sentinelNodePassword: opts.sentinelNodePassword,
        cluster: opts.cluster,
        sshEnabled: opts.sshEnabled,
        sshHost: opts.sshHost,
        sshPort: opts.sshPort,
        sshUsername: opts.sshUsername,
        sshPassword: opts.sshPassword,
        sshPrivateKeyPath: opts.sshPrivateKeyPath,
        sshPassphrase: opts.sshPassphrase,
      })
      if (result.success) {
        await window.electronAPI.redis.disconnect(testId)
        return { success: true }
      }
      return { success: false, error: result.error }
    } catch (err: any) {
      return { success: false, error: err.message }
    }
  }

  async function exportConnections(): Promise<string> {
    const data = JSON.stringify(connections.value, null, 2)
    return data
  }

  async function importConnections(jsonStr: string): Promise<number> {
    try {
      const imported = JSON.parse(jsonStr) as ConnectionConfig[]
      if (!Array.isArray(imported)) throw new Error('Invalid format')
      let count = 0
      for (const conn of imported) {
        if (conn.id && conn.name && conn.host) {
          const exists = connections.value.find((c: ConnectionConfig) => c.id === conn.id)
          if (!exists) {
            await saveConnection(conn)
            count++
          }
        }
      }
      return count
    } catch (err: any) {
      throw new Error('Import failed: ' + err.message)
    }
  }

  return {
    connections, activeId, connectedIds, connecting, error, serverInfo, healthOk, currentDb,
    activeConnection, isConnected,
    loadConnections, decryptPassword, getInfo, saveConnection, deleteConnection, reorderConnections,
    connect, disconnect, disconnectById, switchTo, isConnectedById, testConnection, exportConnections, importConnections,
  }
})