const { app, BrowserWindow, ipcMain } = require('electron')
const path = require('path')
const fs = require('fs')

const isDev = process.env.NODE_ENV !== 'production'
const devUrl = 'http://localhost:5173'
const API_URL_KEY = 'runtime_api_url'
const DEFAULT_API_URL = process.env.VITE_API_URL || 'http://localhost:4000/api'
let mainWindow

function normalizeApiUrl(value) {
  if (!value || typeof value !== 'string') return null
  const trimmed = value.trim().replace(/\/+$/, '')
  if (!trimmed) return null
  if (!/^https?:\/\//i.test(trimmed)) return null
  return /\/api$/i.test(trimmed) ? trimmed : `${trimmed}/api`
}

function getStoragePath() {
  return path.join(app.getPath('userData'), 'storage.json')
}

function readStorage() {
  try {
    const p = getStoragePath()
    if (!fs.existsSync(p)) return {}
    const raw = fs.readFileSync(p, 'utf8') || '{}'
    return JSON.parse(raw)
  } catch (e) {
    return {}
  }
}

function writeStorage(obj) {
  try {
    fs.mkdirSync(path.dirname(getStoragePath()), { recursive: true })
    fs.writeFileSync(getStoragePath(), JSON.stringify(obj, null, 2), 'utf8')
    return true
  } catch (e) {
    return false
  }
}

ipcMain.handle('storage-get', (event, key) => {
  const s = readStorage()
  if (!key) return s
  if (!(key in s)) return null
  return { value: s[key] }
})

ipcMain.handle('storage-set', (event, key, value) => {
  const s = readStorage()
  s[key] = value
  writeStorage(s)
  return true
})

ipcMain.handle('storage-remove', (event, key) => {
  const s = readStorage()
  delete s[key]
  writeStorage(s)
  return true
})

ipcMain.handle('get-api-url', () => {
  const s = readStorage()
  return normalizeApiUrl(s[API_URL_KEY]) || normalizeApiUrl(DEFAULT_API_URL) || 'http://localhost:4000/api'
})

ipcMain.handle('set-api-url', (event, value) => {
  const next = normalizeApiUrl(value)
  if (!next) throw new Error('API URL must be a valid http(s) URL')

  const s = readStorage()
  s[API_URL_KEY] = next
  writeStorage(s)
  return next
})

function createWindow() {
  mainWindow = new BrowserWindow({
    width: 1200,
    height: 800,
    webPreferences: {
      preload: path.join(__dirname, 'preload.cjs'),
      contextIsolation: true,
      nodeIntegration: false
    }
  })

  if (isDev) {
    mainWindow.loadURL(devUrl)
    mainWindow.webContents.openDevTools()
  } else {
    mainWindow.loadFile(path.join(__dirname, '..', 'dist', 'index.html'))
  }
}

app.whenReady().then(createWindow)

app.on('window-all-closed', () => {
  if (process.platform !== 'darwin') app.quit()
})

app.on('activate', () => {
  if (BrowserWindow.getAllWindows().length === 0) createWindow()
})