"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.isYtDlpAvailable = isYtDlpAvailable;
exports.downloadVideo = downloadVideo;
const child_process_1 = require("child_process");
const path_1 = __importDefault(require("path"));
const fs_1 = __importDefault(require("fs"));
function isYtDlpAvailable() {
    try {
        (0, child_process_1.execSync)('yt-dlp --version', { stdio: 'pipe' });
        return true;
    }
    catch {
        return false;
    }
}
const PROGRESS_PREFIX = 'PROG ';
function downloadVideo(url, outputDir, onProgress) {
    return new Promise((resolve, reject) => {
        if (!fs_1.default.existsSync(outputDir)) {
            fs_1.default.mkdirSync(outputDir, { recursive: true });
        }
        const outputTemplate = path_1.default.join(outputDir, '%(title)s.%(ext)s');
        // Pass arguments as an array — no shell, no quoting issues, no truncation
        // on URLs containing & | % ^ etc. (the original execSync bug on Windows).
        const args = [
            '-f', 'best[ext=mp4]/best',
            '-o', outputTemplate,
            '--newline',
            '--progress-template', `${PROGRESS_PREFIX}%(progress._percent_str)s`,
            '--print', 'after_move:filepath',
            '--print', 'title',
            '--no-simulate',
            url,
        ];
        const child = (0, child_process_1.spawn)('yt-dlp', args, { shell: false });
        const stderrLines = [];
        const outputLines = [];
        let stdoutBuf = '';
        let stderrBuf = '';
        const handleStdoutLine = (line) => {
            if (!line)
                return;
            if (line.startsWith(PROGRESS_PREFIX)) {
                const m = line.slice(PROGRESS_PREFIX.length).match(/([\d.]+)\s*%/);
                if (m && onProgress) {
                    const pct = parseFloat(m[1]);
                    if (!isNaN(pct))
                        onProgress(pct);
                }
                return;
            }
            outputLines.push(line);
        };
        child.stdout.on('data', (chunk) => {
            stdoutBuf += chunk.toString('utf-8');
            let nl;
            while ((nl = stdoutBuf.indexOf('\n')) !== -1) {
                const line = stdoutBuf.slice(0, nl).replace(/\r$/, '');
                stdoutBuf = stdoutBuf.slice(nl + 1);
                handleStdoutLine(line.trim());
            }
        });
        child.stderr.on('data', (chunk) => {
            stderrBuf += chunk.toString('utf-8');
            let nl;
            while ((nl = stderrBuf.indexOf('\n')) !== -1) {
                const line = stderrBuf.slice(0, nl).replace(/\r$/, '').trim();
                stderrBuf = stderrBuf.slice(nl + 1);
                if (line)
                    stderrLines.push(line);
            }
        });
        child.on('error', (err) => {
            reject(new Error(`yt-dlp failed to start: ${err.message}`));
        });
        const timeoutMs = 600000;
        const timer = setTimeout(() => {
            child.kill();
            reject(new Error(`yt-dlp timed out after ${timeoutMs / 1000}s`));
        }, timeoutMs);
        child.on('close', (code) => {
            clearTimeout(timer);
            if (stdoutBuf.trim())
                handleStdoutLine(stdoutBuf.trim());
            if (stderrBuf.trim())
                stderrLines.push(stderrBuf.trim());
            if (code !== 0) {
                const tail = stderrLines.slice(-3).join(' | ') || `exit code ${code}`;
                reject(new Error(tail));
                return;
            }
            const filePath = outputLines[0];
            const title = outputLines[1] || (filePath ? path_1.default.basename(filePath) : '');
            if (!filePath) {
                reject(new Error('yt-dlp completed but did not report a filename'));
                return;
            }
            if (!fs_1.default.existsSync(filePath)) {
                reject(new Error(`yt-dlp reported success but file not found: ${filePath}`));
                return;
            }
            resolve({
                filePath: path_1.default.resolve(filePath),
                filename: path_1.default.basename(filePath),
                title,
            });
        });
    });
}
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