'use strict'

const { app, BrowserWindow, ipcMain, dialog, shell, protocol, net } = require('electron')
const path = require('path')
const fs = require('fs')
const { ensureDirs, DIRS, readJson, writeJson } = require('./paths')
const wines = require('./wines')
const prefixes = require('./prefixes')
const library = require('./library')
const runner = require('./runner')
const importer = require('./importer')
const i18n = require('./i18n')
const { createMainWindow } = require('./window')

app.setName('PLGL')

let win = null

function t(code, key, ...args) {
  return i18n.translate(code, key, ...args)
}

function wineFor(id) {
  if (!id || id === 'system') {
    return { id: 'system', type: 'system', label: 'System Wine' }
  }
  if (id === 'default') {
    id = library.loadSettings().defaultWine || 'system'
  }
  const w = wines.getWine(id)
  if (!w) {
    const fallback = library.loadSettings().defaultWine || 'system'
    return wineFor(fallback)
  }
  return w
}

function scanGamesFolder(dir, depth, out) {
  if (depth <= 0 || !out) return
  let entries = []
  try {
    entries = require('fs').readdirSync(dir, { withFileTypes: true })
  } catch {
    return
  }
  for (const e of entries) {
    if (!e.isDirectory()) continue
    const full = path.join(dir, e.name)
    if (require('fs').existsSync(path.join(full, '.plgl-imported'))) {
      out.push(full)
    } else {
      scanGamesFolder(full, depth - 1, out)
    }
  }
}

ipcMain.handle('i18n:list', async () => {
  await i18n.init()
  return i18n.listLangs()
})

ipcMain.handle('i18n:get', async (e, code) => {
  const lang = await i18n.loadLang(code)
  if (lang) return lang
  return (await i18n.loadLang(i18n.FALLBACK)) || { data: {}, texts: {} }
})

ipcMain.handle('settings:get', () => library.loadSettings())
ipcMain.handle('settings:set', (e, patch) => library.saveSettings(patch))

ipcMain.handle('wines:list', async () => {
  await wines.refreshWines()
  return [
    { id: 'system', type: 'system', label: 'System Wine', version: detectSystemWineVersion() },
    ...wines.getWines()
  ]
})

function detectSystemWineVersion() {
  try {
    const { execFileSync } = require('child_process')
    return String(execFileSync('wine', ['--version'], { timeout: 15000 })).trim().replace(/^wine-?/i, '')
  } catch {
    return ''
  }
}

ipcMain.handle('wines:refresh', async () => {
  const list = await wines.refreshWines()
  return list.filter(w => !w.disabled)
})

ipcMain.handle('wines:setDisabled', (e, id, disabled) => wines.setWineDisabled(id, disabled))
ipcMain.handle('wines:setDefault', (e, id) => wines.setDefaultWine(id))
ipcMain.handle('wines:delete', (e, id) => wines.deleteWine(id))
ipcMain.handle('wines:import', async (e, srcDir) => {
  try {
    return await wines.importWineFolder(srcDir)
  } catch (err) {
    return { ok: false, error: String(err && err.message || err) }
  }
})

ipcMain.handle('prefixes:list', () => prefixes.listPrefixes())
ipcMain.handle('prefixes:create', (e, name) => prefixes.createPrefix(name))
ipcMain.handle('prefixes:delete', (e, name) => prefixes.deletePrefix(name))
ipcMain.handle('prefixes:setDefault', (e, name) => prefixes.setDefaultPrefix(name))

ipcMain.handle('games:list', () => library.loadGames())
ipcMain.handle('games:remove', (e, id) => library.removeGame(id))
ipcMain.handle('games:get', (e, id) => library.getGame(id))
ipcMain.handle('games:update', (e, id, patch) => library.updateGame(id, patch))
ipcMain.handle('games:clearPlaytime', (e, id) => library.updateGame(id, { playSeconds: 0, lastPlayed: 0 }))
ipcMain.handle('games:resetIcon', (e, id) => {
  const game = library.getGame(id)
  if (!game) return { ok: false }
  for (const f of ['icon.png', 'icon.ico']) {
    try {
      fs.unlinkSync(path.join(DIRS.DATA, 'icons', id, f))
    } catch {}
  }
  library.updateGame(id, { iconSource: 'none' })
  return { ok: true }
})
ipcMain.handle('games:setIconFile', async (e, id, filePath) => {
  const game = library.getGame(id)
  if (!game || !filePath) return { ok: false, error: 'bad-request' }
  try {
    const dir = path.join(DIRS.DATA, 'icons', id)
    fs.mkdirSync(dir, { recursive: true })
    for (const f of fs.readdirSync(dir)) {
      if (f.startsWith('icon.')) fs.unlinkSync(path.join(dir, f))
    }
    const icon = require('./icons')
    let dst
    if (filePath.toLowerCase().endsWith('.exe')) {
      dst = path.join(dir, 'icon.ico')
      const res = icon.extractIconFromExe(filePath, dst)
      if (!res.ok) return res
    } else {
      dst = path.join(dir, `icon${path.extname(filePath).toLowerCase() || '.png'}`)
      fs.copyFileSync(filePath, dst)
    }
    library.updateGame(id, { iconSource: dst })
    return { ok: true, path: dst }
  } catch (err) {
    return { ok: false, error: String(err && err.message || err) }
  }
})
ipcMain.handle('games:extractIcon', (e, id) => {
  const game = library.getGame(id)
  if (!game || !game.exePath) return { ok: false, error: 'bad-request' }
  const out = path.join(DIRS.DATA, 'icons', id, 'icon.ico')
  const res = require('./icons').extractIconFromExe(game.exePath, out)
  if (res.ok) library.updateGame(id, { iconSource: out })
  return res
})
ipcMain.handle('games:autoIcon', (e, id) => {
  const game = library.getGame(id)
  if (!game || !game.exePath) return { ok: false, error: 'bad-request' }
  const dir = path.join(DIRS.DATA, 'icons', id)
  try {
    for (const f of fs.readdirSync(dir)) {
      if (f.startsWith('icon.')) fs.unlinkSync(path.join(dir, f))
    }
  } catch {}
  const out = path.join(dir, 'icon.ico')
  const res = require('./icons').extractIconFromExe(game.exePath, out)
  if (res.ok) library.updateGame(id, { iconSource: out })
  return res
})
ipcMain.handle('games:iconPath', (e, id) => {
  const game = library.getGame(id)
  if (!game || !game.iconSource) return null
  return fs.existsSync(game.iconSource) ? game.iconSource : null
})

ipcMain.handle('games:pickFolder', async e => {
  const res = await dialog.showOpenDialog(win, {
    title: t(library.loadSettings().language, 'import.pickFolder'),
    properties: ['openDirectory']
  })
  if (res.canceled || !res.filePaths[0]) return null
  return res.filePaths[0]
})

ipcMain.handle('games:import', async (e, srcDir, mode) => {
  const onProgress = data => {
    if (win && !win.isDestroyed()) win.webContents.send('import:progress', data)
  }
  const game = await importer.importGame(srcDir, mode, onProgress)
  library.addGame(game)
  require('fs').writeFileSync(path.join(game.workdir, '.plgl-imported'), '')
  return game
})

const running = new Map()
const killRequests = new Set()

ipcMain.handle('games:run', async (e, id) => {
  const game = library.getGame(id)
  if (!game) return { ok: false, error: 'game-not-found' }
  if (running.has(id)) return { ok: false, error: 'already-running' }
  running.set(id, null)
  let wine
  try {
    wine = wineFor(game.wine)
  } catch {
    running.delete(id)
    return { ok: false, error: 'wine-not-found' }
  }
  const systemWine = wine.type === 'system'
  try {
    const res = await runner.runGame({
      game,
      wine,
      systemWine,
      onExit: () => {
        running.delete(id)
        if (win && !win.isDestroyed()) win.webContents.send('games:changed')
      }
    })
    if (res.pid) running.set(id, res.pid)
    if (killRequests.has(id)) {
      killRequests.delete(id)
      if (res.pid) {
        try {
          process.kill(-res.pid, 'SIGKILL')
        } catch {}
        try {
          process.kill(res.pid, 'SIGKILL')
        } catch {}
      }
    }
    if (win && !win.isDestroyed()) win.webContents.send('games:changed')
    return { ok: true }
  } catch (err) {
    running.delete(id)
    return { ok: false, error: String(err && err.message || err) }
  }
})

ipcMain.handle('games:runTool', async (e, id, tool, args) => {
  const game = library.getGame(id)
  if (!game) return { ok: false, error: 'game-not-found' }
  let wine
  try {
    wine = wineFor(game.wine)
  } catch {
    return { ok: false, error: 'wine-not-found' }
  }
  const systemWine = wine.type === 'system'
  try {
    await runner.runTool({ game, wine, tool, args, systemWine })
    return { ok: true }
  } catch (err) {
    return { ok: false, error: String(err && err.message || err) }
  }
})

ipcMain.handle('dialog:pickFile', async (e, opts) => {
  const res = await dialog.showOpenDialog(win, {
    properties: ['openFile', 'openDirectory'],
    ...(opts || {})
  })
  if (res.canceled || !res.filePaths[0]) return null
  return res.filePaths[0]
})

ipcMain.handle('shell:openPath', (e, p) => shell.openPath(p))
ipcMain.handle('shell:showItemInFolder', (e, p) => {
  shell.showItemInFolder(p)
  return true
})

ipcMain.handle('games:getLogs', (e, id) => {
  const dir = path.join(DIRS.DATA, 'logs')
  let files = []
  try {
    files = require('fs').readdirSync(dir).filter(f => f.startsWith(id + '-')).sort()
  } catch {}
  return files.map(f => path.join(dir, f))
})

ipcMain.handle('games:kill', (e, id) => {
  const pid = running.get(id)
  if (pid) {
    try {
      process.kill(-pid, 'SIGKILL')
    } catch {}
    try {
      process.kill(pid, 'SIGKILL')
    } catch {}
    running.delete(id)
    if (win && !win.isDestroyed()) win.webContents.send('games:changed')
  } else if (running.has(id)) {
    killRequests.add(id)
  }
  return { ok: true }
})

ipcMain.handle('games:isRunning', (e, id) => running.has(id))
ipcMain.handle('games:listRunning', () => [...running.keys()])

app.whenReady().then(async () => {
  if (process.platform === 'linux') {
    const { setAppIcon } = require('./appicon')
    try {
      setAppIcon(app)
    } catch {}
  }
  protocol.handle('plgl-icon', request => {
    const id = decodeURIComponent(new URL(request.url).hostname)
    const dir = path.join(DIRS.DATA, 'icons', id)
    let file = null
    try {
      const files = fs.readdirSync(dir).filter(f => f.startsWith('icon.')).sort()
      const pick = files.find(f => /^icon\.(png|jpe?g|svg|ico|webp|gif|bmp)$/i.test(f))
      if (pick) file = path.join(dir, pick)
    } catch {}
    if (!file) return new Response('', { status: 404 })
    return net.fetch('file://' + file)
  })
  ensureDirs()
  await i18n.init()
  await wines.refreshWines()
  win = createMainWindow()
  win.on('closed', () => {
    win = null
  })
})

app.on('window-all-closed', () => {
  app.quit()
})