const fs = require('fs');
const path = require('path');
const { execSync } = require('child_process');

// 1. Load configuration from .env.agent
const envPath = path.join(__dirname, '../config/.env.agent');
if (!fs.existsSync(envPath)) {
    console.error("Error: .agent/config/.env.agent file not found. Please create it from the template.");
    process.exit(1);
}

const envContent = fs.readFileSync(envPath, 'utf8');
const env = {};
envContent.split('\n').forEach(line => {
    // Basic dotenv parser supporting basic key="value" formats
    const match = line.match(/^([^#=]+)="?(.*?)"?$/);
    if (match) {
        env[match[1].trim()] = match[2].trim();
    }
});

// 2. Resolve Wiki URL (handle simple interpolations)
let wikiUrl = env.WIKI_REPO_URL;
if (!wikiUrl) {
    console.error("Error: WIKI_REPO_URL is not defined in .env.agent.");
    process.exit(1);
}

if (wikiUrl.includes('${GITEA_USERNAME}')) {
    wikiUrl = wikiUrl.replace('${GITEA_USERNAME}', env.GITEA_USERNAME || '');
}
if (wikiUrl.includes('${GITEA_API_TOKEN}')) {
    wikiUrl = wikiUrl.replace('${GITEA_API_TOKEN}', env.GITEA_API_TOKEN || '');
}

if (wikiUrl.includes('[YOUR_')) {
    console.error("Warning: WIKI_REPO_URL looks like it contains placeholder tags ([YOUR_...]). Ensure the config is set up correctly.");
    // We let it proceed in case it's a test environment with dummy tags
}

// 3. Execute Git commands in the Wiki directory
const wikiDir = path.join(__dirname, '../../.knowledge/project_wiki');

if (!fs.existsSync(path.join(wikiDir, '.git'))) {
    console.error(`Error: .git repository not found inside ${wikiDir}. Wiki must be initialized via git first.`);
    process.exit(1);
}

try {
    console.log("Adding Wiki changes...");
    execSync('git add .', { cwd: wikiDir, stdio: 'inherit' });
    
    // Check if there are changes to commit
    const status = execSync('git status --porcelain', { cwd: wikiDir }).toString();
    if (status.trim().length > 0) {
        console.log("Committing changes...");
        execSync('git commit -m "docs(agent): Auto-sync Wiki from Antigravity Agent"', { cwd: wikiDir, stdio: 'inherit' });
    } else {
        console.log("No changes to commit in Wiki.");
    }

    console.log("Pushing to Gitea Wiki repository...");
    // WARNING: Output masking is not actively done here; this relies on the underlying tool to obscure tokens if echoed,
    // but execSync with 'inherit' might leak the URL if git fails. We mask it manually for display, but git handles the URL internally.
    execSync(`git push "${wikiUrl}" main`, { cwd: wikiDir, stdio: 'pipe' }); 
    console.log("✅ Wiki synchronization completed successfully.");
} catch (e) {
    console.error("❌ Failed to sync wiki.");
    // Mask API tokens in error messages
    const errorMessage = e.message.replace(new RegExp(env.GITEA_API_TOKEN || 'dummy', 'g'), '********');
    console.error(errorMessage);
    if (e.stderr) {
        const stderrStr = e.stderr.toString().replace(new RegExp(env.GITEA_API_TOKEN || 'dummy', 'g'), '********');
        console.error(stderrStr);
    }
    process.exit(1);
}