#!/usr/bin/env node
'use strict';

/**
 * Merge Gitea release channel (non-token) into default-launcher.json before pack.
 * Precedence: env → fractured-release-channel.json → leave existing default-launcher values.
 *
 * Env (any of these names):
 *   FRACTURED_LAUNCHER_GITEA_BASE_URL | GITEA_BASE_URL
 *   FRACTURED_LAUNCHER_GITEA_OWNER   | GITEA_OWNER
 *   FRACTURED_LAUNCHER_GITEA_REPO    | GITEA_REPO
 *   FRACTURED_LAUNCHER_GITEA_RELEASE_TAG | GITEA_RELEASE_TAG
 */
const fs = require('fs');
const path = require('path');

const root = path.join(__dirname, '..');
const defPath = path.join(root, 'default-launcher.json');
const channelPath = path.join(root, 'fractured-release-channel.json');

function pickEnv() {
  return {
    base_url: String(
      process.env.FRACTURED_LAUNCHER_GITEA_BASE_URL || process.env.GITEA_BASE_URL || ''
    ).trim(),
    owner: String(
      process.env.FRACTURED_LAUNCHER_GITEA_OWNER || process.env.GITEA_OWNER || ''
    ).trim(),
    repo: String(
      process.env.FRACTURED_LAUNCHER_GITEA_REPO || process.env.GITEA_REPO || ''
    ).trim(),
    release_tag: String(
      process.env.FRACTURED_LAUNCHER_GITEA_RELEASE_TAG || process.env.GITEA_RELEASE_TAG || ''
    ).trim(),
  };
}

function main() {
  const cfg = JSON.parse(fs.readFileSync(defPath, 'utf8'));
  cfg.gitea = cfg.gitea && typeof cfg.gitea === 'object' ? cfg.gitea : {};

  let fileGitea = {};
  try {
    const raw = JSON.parse(fs.readFileSync(channelPath, 'utf8'));
    if (raw && raw.gitea && typeof raw.gitea === 'object') fileGitea = raw.gitea;
  } catch (e) {
    if (e.code !== 'ENOENT') throw e;
  }

  const env = pickEnv();
  const keys = ['base_url', 'owner', 'repo', 'release_tag'];
  let changed = false;

  for (const k of keys) {
    const fromEnv = env[k];
    const fromFile =
      fileGitea[k] != null && String(fileGitea[k]).trim() !== '' ? String(fileGitea[k]).trim() : '';
    const val = (fromEnv && String(fromEnv).trim()) || fromFile;
    if (!val) continue;
    if (cfg.gitea[k] !== val) {
      cfg.gitea[k] = val;
      changed = true;
    }
  }

  if (!changed) {
    console.log(
      'inject-release-channel: no overrides (set GITEA_* env and/or fill fractured-release-channel.json)'
    );
    return;
  }

  fs.writeFileSync(defPath, `${JSON.stringify(cfg, null, 2)}\n`, 'utf8');
  console.log('inject-release-channel: wrote gitea.* into default-launcher.json for this build');
}

main();