"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.checkoutRepo = void 0;
const fs_1 = require("fs");
const path_1 = require("path");
const simple_git_1 = require("simple-git");
const context_1 = require("./context");
const pino_1 = __importDefault(require("pino"));
const logger = (0, pino_1.default)({ level: process.env.LOG_LEVEL || 'info' });
const checkoutRepo = async (tempDir, options = {}) => {
    const ctx = (0, context_1.getCurrentContext)();
    if (!ctx)
        throw new Error('No context available for checkout');
    // Verify git is available
    const git = (0, simple_git_1.simpleGit)();
    try {
        await git.raw(['--version']);
    }
    catch (e) {
        throw new Error('git command not found in PATH. Please install git.');
    }
    const { owner, repo } = ctx.repo;
    const installationId = ctx.probotContext.payload.installation?.id;
    if (!installationId) {
        throw new Error('Installation ID not found in payload');
    }
    const { token } = (await ctx.probotContext.octokit.auth({
        type: 'installation'
    }));
    if (!token) {
        throw new Error('Failed to create installation access token: token is undefined');
    }
    // Ensure gh CLI is authenticated for subsequent contexts
    process.env.GH_TOKEN = token;
    process.env.GITHUB_TOKEN = token;
    // SECURITY: Use token via environment variable, NOT in URL
    // This prevents token exposure in process listings and logs
    const cloneUrl = `https://github.com/${owner}/${repo}.git`;
    const isPullRequest = !!ctx.probotContext.payload.pull_request;
    const headBranch = isPullRequest
        ? ctx.probotContext.payload.pull_request.head.ref
        : (ctx.probotContext.payload.ref?.replace('refs/heads/', '') || ctx.probotContext.payload.repository?.default_branch || 'main');
    const headSha = isPullRequest
        ? ctx.probotContext.payload.pull_request.head.sha
        : (options.ref || ctx.probotContext.payload.after);
    // Set up git credential helper for secure token authentication
    process.env.GIT_ASKPASS = 'echo';
    process.env.GIT_USERNAME = 'x-access-token';
    process.env.GIT_PASSWORD = token;
    if ((0, fs_1.existsSync)(tempDir)) {
        (0, fs_1.rmSync)(tempDir, { recursive: true, force: true });
    }
    (0, fs_1.mkdirSync)(tempDir, { recursive: true });
    logger.info({ owner, repo, tempDir }, 'Cloning repository');
    const repoGit = (0, simple_git_1.simpleGit)(tempDir, {
        timeout: { block: 120000 } // 2 minute timeout for all git operations
    });
    try {
        if (options.sparse && options.files && options.files.length > 0) {
            logger.info({ fileCount: options.files.length }, 'Using sparse checkout');
            // Initialize empty repo and configure sparse checkout
            await repoGit.init(['--bare']);
            await repoGit.addRemote('origin', cloneUrl);
            // Configure sparse checkout
            await repoGit.raw(['config', 'core.sparseCheckout', 'true']);
            (0, fs_1.writeFileSync)((0, path_1.join)(tempDir, '.git/info/sparse-checkout'), options.files.join('\n'));
            // Fetch and checkout specific commit
            await repoGit.fetch(['origin', headSha, '--depth', '1']);
            await repoGit.checkout(['FETCH_HEAD']);
        }
        else {
            logger.info('Performing full shallow clone');
            // Clone with depth 1 for efficiency
            await repoGit.clone(cloneUrl, '.', [
                '--depth', '1',
                '--single-branch',
                '--branch', headBranch,
                '--no-checkout'
            ]);
            // Fetch and checkout specific SHA
            await repoGit.fetch(['origin', headSha, '--depth', '1']);
            await repoGit.checkout([headSha]);
        }
        // Configure git identity
        await repoGit.addConfig('user.name', 'PRIX AI Auditor');
        await repoGit.addConfig('user.email', 'bot@prix.ai');
        logger.info({ owner, repo, headSha }, 'Repository cloned successfully');
    }
    catch (error) {
        logger.error({ error, owner, repo }, 'Git operation failed');
        throw new Error(`Failed to clone repository: ${error}`);
    }
    return tempDir;
};
exports.checkoutRepo = checkoutRepo;
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