import { app, BrowserWindow, shell, ipcMain } from 'electron'
import { fileURLToPath } from 'node:url'
import path from 'node:path'
import {
  fetchEntries,
  fetchTravellers,
  createTraveller,
  createEntry,
  updateEntry,
  deleteEntry,
  fetchVaccines,
  fetchVaccineRecords,
  saveVaccineRecord,
  updateVaccineRecord,
  fetchNotifications,
  updateNotification,
  markNotificationRead,
  markAllNotificationsRead,
  archiveNotification,
} from './pocketbase.js'
import { JUVONNO_API_URL, JUVONNO_API_KEY } from './juvonno-config.js'
import {
  AUDIT_WEBHOOK_URL,
  AUDIT_API_KEY,
  REPORTS_WEBHOOK_URL,
  REPORTS_API_KEY,
} from './n8n-config.js'

const __dirname = path.dirname(fileURLToPath(import.meta.url))

// ─── Paths ──────────────────────────────────────────────────────────────────
// Compiled main lives in dist-electron/main/ — go up two levels to reach dist/
const RENDERER_DIST = path.join(__dirname, '../../dist')
// Preload is compiled to dist-electron/preload/index.cjs (explicitly CJS)
const PRELOAD_PATH  = path.join(__dirname, '../preload/index.cjs')

// ─── Dev server URL ─────────────────────────────────────────────────────────
// vite-plugin-electron sets this env var when running in development mode.
const VITE_DEV_SERVER_URL = process.env.VITE_DEV_SERVER_URL

// ─── Window reference ────────────────────────────────────────────────────────
let mainWindow

function createWindow() {
  mainWindow = new BrowserWindow({
    width: 1280,
    height: 800,
    minWidth: 900,
    minHeight: 600,
    title: 'CTM Concierge',
    show: false, // show after ready-to-show to prevent visual flash
    backgroundColor: '#0f1117',
    webPreferences: {
      // ── Security defaults ──────────────────────────────────────────────
      contextIsolation: true,   // Isolates renderer from Electron internals
      nodeIntegration: false,   // Renderer cannot access Node.js APIs directly
      sandbox: false,           // Must be false so preload can use require('electron') for contextBridge
      webSecurity: true,
      // ── Preload ────────────────────────────────────────────────────────
      preload: PRELOAD_PATH,
    },
  })

  // Gracefully show window once the DOM is ready to avoid white flash
  mainWindow.once('ready-to-show', () => {
    mainWindow.show()
  })

  // Open external links in the system browser, not Electron
  mainWindow.webContents.setWindowOpenHandler(({ url }) => {
    if (url.startsWith('https:') || url.startsWith('http:')) {
      shell.openExternal(url)
    }
    return { action: 'deny' }
  })

  // ── Load the app ─────────────────────────────────────────────────────────
  if (VITE_DEV_SERVER_URL) {
    // Development: load from Vite HMR dev server
    mainWindow.loadURL(VITE_DEV_SERVER_URL)
    mainWindow.webContents.openDevTools()
  } else {
    // Production: load compiled static files
    mainWindow.loadFile(path.join(RENDERER_DIST, 'index.html'))
  }
}

// ─── App lifecycle ───────────────────────────────────────────────────────────
app.whenReady().then(() => {
  createWindow()

  // macOS: re-create window when dock icon is clicked and no windows are open
  app.on('activate', () => {
    if (BrowserWindow.getAllWindows().length === 0) {
      createWindow()
    }
  })
})

// Quit when all windows are closed (except on macOS)
app.on('window-all-closed', () => {
  if (process.platform !== 'darwin') {
    app.quit()
    mainWindow = null
  }
})

// ─── IPC Handlers ────────────────────────────────────────────────────────────
// Register main-process IPC handlers here.
// Example: ipcMain.handle('channel-name', async (event, ...args) => { ... })

ipcMain.handle('app:get-version', () => app.getVersion())
ipcMain.handle('pb:fetch-entries', async () => {
  return await fetchEntries()
})
ipcMain.handle('pb:fetch-travellers', async () => {
  return await fetchTravellers()
})
ipcMain.handle('pb:create-traveller', async (_event, data) => {
  return await createTraveller(data)
})
ipcMain.handle('pb:create-entry', async (_event, trip) => {
  return await createEntry(trip)
})
ipcMain.handle('pb:update-entry', async (_event, id, trip) => {
  return await updateEntry(id, trip)
})
ipcMain.handle('pb:delete-entry', async (_event, id) => {
  return await deleteEntry(id)
})

ipcMain.handle('pb:fetch-vaccines', async () => {
  return await fetchVaccines()
})

ipcMain.handle('pb:fetch-vaccine-records', async () => {
  return await fetchVaccineRecords()
})

ipcMain.handle('pb:save-vaccine-record', async (_event, recordData) => {
  return await saveVaccineRecord(recordData)
})

ipcMain.handle('pb:update-vaccine-record', async (_event, id, recordData) => {
  return await updateVaccineRecord(id, recordData)
})

ipcMain.handle('pb:fetch-notifications', async (_event, options) => {
  return await fetchNotifications(options)
})

ipcMain.handle('pb:update-notification', async (_event, id, data) => {
  return await updateNotification(id, data)
})

ipcMain.handle('pb:mark-notification-read', async (_event, id, isRead) => {
  return await markNotificationRead(id, isRead)
})

ipcMain.handle('pb:mark-all-notifications-read', async () => {
  return await markAllNotificationsRead()
})

ipcMain.handle('pb:archive-notification', async (_event, id, isArchived) => {
  return await archiveNotification(id, isArchived)
})

// ─── Health Risk Audit IPC Handler (Node-side to avoid CORS) ────────────────
ipcMain.handle('audit:run-health-audit', async (_event, payload) => {
  const response = await fetch(AUDIT_WEBHOOK_URL, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      'X-API-Key': AUDIT_API_KEY,
    },
    body: JSON.stringify(payload),
  })

  if (!response.ok) {
    throw new Error(`Audit webhook returned HTTP ${response.status} ${response.statusText}`)
  }

  return await response.json()
})

// ─── Juvonno EMR IPC Handler (Node-side to avoid CORS) ──────────────────────
ipcMain.handle('juvonno:fetch-chart', async (_event, emrId) => {
  if (!emrId) {
    throw new Error('EMR ID is required.')
  }

  const url = `${JUVONNO_API_URL}/customers/chart/${encodeURIComponent(emrId)}`
  const response = await fetch(url, {
    method: 'GET',
    headers: {
      'Accept': 'application/json',
      'X-API-Key': JUVONNO_API_KEY,
    },
  })

  if (!response.ok) {
    if (response.status === 404) {
      throw new Error(`Customer chart with EMR ID "${emrId}" not found in Juvonno.`)
    }
    if (response.status === 403 || response.status === 401) {
      throw new Error(`Juvonno authentication failed (HTTP ${response.status}). Please verify the X-API-Key in juvonno-config.js.`)
    }
    throw new Error(`Juvonno API error: HTTP ${response.status} ${response.statusText}`)
  }

  return await response.json()
})

// ─── Reports Webhook IPC Handler (Node-side to avoid CORS) ──────────────────
ipcMain.handle('reports:fetch-report', async (_event, payload) => {
  const response = await fetch(REPORTS_WEBHOOK_URL, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      'X-API-Key': REPORTS_API_KEY,
    },
    body: JSON.stringify(payload),
  })

  const text = await response.text()
  if (!response.ok) {
    throw new Error(`Reports webhook returned HTTP ${response.status} ${response.statusText}${text ? ` - ${text.slice(0, 150)}` : ''}`)
  }

  try {
    return JSON.parse(text)
  } catch {
    throw new Error(`Invalid JSON response from webhook: ${text.slice(0, 150)}`)
  }
})