import path from 'node:path';
import { spawn } from 'node:child_process';
import { app, dialog } from 'electron';
import { printHelp } from './cli/help';
import { loadRawConfigStrict } from './config/load';
import {
  configureEarlyAppPaths,
  normalizeLaunchMpvExtraArgs,
  normalizeLaunchMpvTargets,
  normalizeStartupArgv,
  sanitizeStartupEnv,
  sanitizeBackgroundEnv,
  sanitizeHelpEnv,
  sanitizeLaunchMpvEnv,
  shouldDetachBackgroundLaunch,
  shouldHandleHelpOnlyAtEntry,
  shouldHandleLaunchMpvAtEntry,
  shouldHandleStatsDaemonCommandAtEntry,
} from './main-entry-runtime';
import { requestSingleInstanceLockEarly } from './main/early-single-instance';
import { resolvePackagedFirstRunPluginAssets } from './main/runtime/first-run-setup-plugin';
import { createWindowsMpvLaunchDeps, launchWindowsMpv } from './main/runtime/windows-mpv-launch';
import { parseMpvLaunchMode } from './shared/mpv-launch-mode';
import { runStatsDaemonControlFromProcess } from './stats-daemon-entry';

const DEFAULT_TEXTHOOKER_PORT = 5174;

function applySanitizedEnv(sanitizedEnv: NodeJS.ProcessEnv): void {
  if (sanitizedEnv.NODE_NO_WARNINGS) {
    process.env.NODE_NO_WARNINGS = sanitizedEnv.NODE_NO_WARNINGS;
  }

  if (sanitizedEnv.VK_INSTANCE_LAYERS) {
    process.env.VK_INSTANCE_LAYERS = sanitizedEnv.VK_INSTANCE_LAYERS;
  } else {
    delete process.env.VK_INSTANCE_LAYERS;
  }
}

function resolveBundledWindowsMpvPluginEntrypoint(): string | undefined {
  const assets = resolvePackagedFirstRunPluginAssets({
    dirname: __dirname,
    appPath: app.getAppPath(),
    resourcesPath: process.resourcesPath,
  });
  if (!assets) {
    return undefined;
  }

  return path.join(assets.pluginDirSource, 'main.lua');
}

function readConfiguredWindowsMpvLaunch(configDir: string): {
  executablePath: string;
  launchMode: 'normal' | 'maximized' | 'fullscreen';
} {
  const loadResult = loadRawConfigStrict({
    configDir,
    configFileJsonc: path.join(configDir, 'config.jsonc'),
    configFileJson: path.join(configDir, 'config.json'),
  });
  if (!loadResult.ok) {
    return {
      executablePath: '',
      launchMode: 'normal',
    };
  }

  return {
    executablePath:
      typeof loadResult.config.mpv?.executablePath === 'string'
        ? loadResult.config.mpv.executablePath.trim()
        : '',
    launchMode: parseMpvLaunchMode(loadResult.config.mpv?.launchMode) ?? 'normal',
  };
}

process.argv = normalizeStartupArgv(process.argv, process.env);
applySanitizedEnv(sanitizeStartupEnv(process.env));
const userDataPath = configureEarlyAppPaths(app);

if (shouldDetachBackgroundLaunch(process.argv, process.env)) {
  const child = spawn(process.execPath, process.argv.slice(1), {
    detached: true,
    stdio: 'ignore',
    env: sanitizeBackgroundEnv(process.env),
  });
  child.unref();
  process.exit(0);
}

if (shouldHandleHelpOnlyAtEntry(process.argv, process.env)) {
  const sanitizedEnv = sanitizeHelpEnv(process.env);
  process.env.NODE_NO_WARNINGS = sanitizedEnv.NODE_NO_WARNINGS;
  if (!sanitizedEnv.VK_INSTANCE_LAYERS) {
    delete process.env.VK_INSTANCE_LAYERS;
  }
  printHelp(DEFAULT_TEXTHOOKER_PORT);
  process.exit(0);
}

if (shouldHandleLaunchMpvAtEntry(process.argv, process.env)) {
  const sanitizedEnv = sanitizeLaunchMpvEnv(process.env);
  applySanitizedEnv(sanitizedEnv);
  void app.whenReady().then(async () => {
    const configuredMpvLaunch = readConfiguredWindowsMpvLaunch(userDataPath);
    const result = await launchWindowsMpv(
      normalizeLaunchMpvTargets(process.argv),
      createWindowsMpvLaunchDeps({
        getEnv: (name) => process.env[name],
        showError: (title, content) => {
          dialog.showErrorBox(title, content);
        },
      }),
      normalizeLaunchMpvExtraArgs(process.argv),
      process.execPath,
      resolveBundledWindowsMpvPluginEntrypoint(),
      configuredMpvLaunch.executablePath,
      configuredMpvLaunch.launchMode,
    );
    app.exit(result.ok ? 0 : 1);
  });
} else if (shouldHandleStatsDaemonCommandAtEntry(process.argv, process.env)) {
  void app.whenReady().then(async () => {
    const exitCode = await runStatsDaemonControlFromProcess(app.getPath('userData'));
    app.exit(exitCode);
  });
} else {
  const gotSingleInstanceLock = requestSingleInstanceLockEarly(app);
  if (!gotSingleInstanceLock) {
    app.exit(0);
  }
  require('./main.js');
}