export const SUPPORTED_TYPES = ['kiro', 'codex', 'opencode', 'claude-code', 'openclaw', 'cursor', 'openspec'];
export function parseArgs(argv) {
    let inputPath = '';
    let port = 3000;
    let open = true;
    let watch = true;
    let init = false;
    let full = false;
    let command = 'help';
    let type;
    let i = 0;
    while (i < argv.length) {
        const arg = argv[i];
        if (arg === '--help' || arg === '-h') {
            command = 'help';
            i++;
        }
        else if (arg === '--preview') {
            command = 'preview';
            i++;
            if (i < argv.length && !argv[i].startsWith('-')) {
                inputPath = argv[i];
                i++;
            }
        }
        else if (arg.startsWith('--preview=')) {
            command = 'preview';
            inputPath = arg.slice('--preview='.length);
            i++;
        }
        else if (arg === '--create-md') {
            command = 'create-md';
            i++;
            // Optional: next argument is the target path (if not a flag)
            if (i < argv.length && !argv[i].startsWith('-')) {
                inputPath = argv[i];
                i++;
            }
        }
        else if (arg.startsWith('--create-md=')) {
            command = 'create-md';
            inputPath = arg.slice('--create-md='.length);
            i++;
        }
        else if (arg === '--analyze') {
            command = 'analyze';
            i++;
            // Optional: next argument is the target path (if not a flag)
            if (i < argv.length && !argv[i].startsWith('-')) {
                inputPath = argv[i];
                i++;
            }
        }
        else if (arg.startsWith('--analyze=')) {
            command = 'analyze';
            inputPath = arg.slice('--analyze='.length);
            i++;
        }
        else if (arg === '--full') {
            full = true;
            i++;
        }
        else if (arg === '--type') {
            i++;
            if (i < argv.length) {
                const val = argv[i];
                if (SUPPORTED_TYPES.includes(val)) {
                    type = val;
                }
                else {
                    return { success: false, error: `Invalid type: "${argv[i]}". Supported types: ${SUPPORTED_TYPES.join(', ')}` };
                }
                i++;
            }
            else {
                return { success: false, error: `Missing value for --type. Supported types: ${SUPPORTED_TYPES.join(', ')}` };
            }
        }
        else if (arg.startsWith('--type=')) {
            const val = arg.slice('--type='.length);
            if (SUPPORTED_TYPES.includes(val)) {
                type = val;
            }
            else {
                return { success: false, error: `Invalid type: "${val}". Supported types: ${SUPPORTED_TYPES.join(', ')}` };
            }
            i++;
        }
        else if (arg === '--no-open') {
            open = false;
            i++;
        }
        else if (arg === '--no-watch') {
            watch = false;
            i++;
        }
        else if (arg === '--init') {
            init = true;
            i++;
        }
        else if (arg === '--port') {
            i++;
            const portValue = argv[i];
            const parsed = parsePort(portValue);
            if (parsed === null) {
                return { success: false, error: `Invalid port: ${portValue ?? ''}. Must be a number between 1 and 65535` };
            }
            port = parsed;
            i++;
        }
        else if (arg.startsWith('--port=')) {
            const portValue = arg.slice('--port='.length);
            const parsed = parsePort(portValue);
            if (parsed === null) {
                return { success: false, error: `Invalid port: ${portValue}. Must be a number between 1 and 65535` };
            }
            port = parsed;
            i++;
        }
        else if (arg.startsWith('-')) {
            // Unknown flag — ignore (forward-compatible)
            i++;
        }
        else {
            // Positional argument — ignore
            i++;
        }
    }
    // Validation
    if (command === 'preview' && !inputPath) {
        return { success: false, error: 'Missing required path for --preview. Usage: project-understand --preview <path>' };
    }
    return {
        success: true,
        options: {
            command,
            inputPath,
            port,
            open,
            watch,
            init,
            full,
            type,
        },
    };
}
function parsePort(value) {
    if (value === undefined || value === '') {
        return null;
    }
    const num = Number(value);
    if (!Number.isInteger(num) || num < 1 || num > 65535) {
        return null;
    }
    return num;
}
export function getUsageText() {
    return `Usage: project-understand [command] [options]

Commands:
  --preview <path>          Start a local preview server for dashboard files
  --create-md [path]        Generate agent config files for the target directory (default: current dir)
  --analyze [path]          Run static code analysis and generate a knowledge graph (default: current dir)

Options:
  --type <type>             Template type for --create-md (required)
                            Supported: kiro, codex, opencode, claude-code, openclaw, cursor, openspec
  --init                    Install openspec globally and run 'openspec init' before generating files
  --full                    Force full rebuild when running --analyze (skip incremental mode)
  --port <number>           Port for the preview server (default: 3000)
  --no-open                 Do not open the browser automatically
  --no-watch                Do not watch for file changes
  --help, -h                Show this help message

Examples:
  project-understand --preview ./dashboards
  project-understand --preview ./my-dashboard.json --port 8080
  project-understand --create-md --type kiro
  project-understand --create-md ./my-project --type codex
  project-understand --create-md --type openspec --init
  project-understand --analyze
  project-understand --analyze ./my-project
  project-understand --analyze ./my-project --full`;
}