import { existsSync, readdirSync, readFileSync } from 'fs';
import { join } from 'path';
import { MarkdownParser } from '../core/parsers/markdown-parser.js';
import { Validator } from '../core/validation/validator.js';
import { isInteractive } from '../utils/interactive.js';
import { getSpecIds } from '../utils/item-discovery.js';
const SPECS_DIR = 'projectx/specs';
function parseSpecFromFile(specPath, specId) {
    const content = readFileSync(specPath, 'utf-8');
    const parser = new MarkdownParser(content);
    return parser.parseSpec(specId);
}
function validateRequirementIndex(spec, requirementOpt) {
    if (!requirementOpt)
        return undefined;
    const index = Number.parseInt(requirementOpt, 10);
    if (!Number.isInteger(index) || index < 1 || index > spec.requirements.length) {
        throw new Error(`Requirement ${requirementOpt} not found`);
    }
    return index - 1; // convert to 0-based
}
function filterSpec(spec, options) {
    const requirementIndex = validateRequirementIndex(spec, options.requirement);
    const includeScenarios = options.scenarios !== false && !options.requirements;
    const filteredRequirements = (requirementIndex !== undefined
        ? [spec.requirements[requirementIndex]]
        : spec.requirements).map(req => ({
        text: req.text,
        scenarios: includeScenarios ? req.scenarios : [],
    }));
    const metadata = spec.metadata ?? { version: '1.0.0', format: 'projectx' };
    return {
        name: spec.name,
        overview: spec.overview,
        requirements: filteredRequirements,
        metadata,
    };
}
/**
 * Print the raw markdown content for a spec file without any formatting.
 * Raw-first behavior ensures text mode is a passthrough for deterministic output.
 */
function printSpecTextRaw(specPath) {
    const content = readFileSync(specPath, 'utf-8');
    console.log(content);
}
export class SpecCommand {
    SPECS_DIR = 'projectx/specs';
    async show(specId, options = {}) {
        if (!specId) {
            const canPrompt = isInteractive(options);
            const specIds = await getSpecIds();
            if (canPrompt && specIds.length > 0) {
                const { select } = await import('@inquirer/prompts');
                specId = await select({
                    message: 'Select a spec to show',
                    choices: specIds.map(id => ({ name: id, value: id })),
                });
            }
            else {
                throw new Error('Missing required argument <spec-id>');
            }
        }
        const specPath = join(this.SPECS_DIR, specId, 'spec.md');
        if (!existsSync(specPath)) {
            throw new Error(`Spec '${specId}' not found at projectx/specs/${specId}/spec.md`);
        }
        if (options.json) {
            if (options.requirements && options.requirement) {
                throw new Error('Options --requirements and --requirement cannot be used together');
            }
            const parsed = parseSpecFromFile(specPath, specId);
            const filtered = filterSpec(parsed, options);
            const output = {
                id: specId,
                title: parsed.name,
                overview: parsed.overview,
                requirementCount: filtered.requirements.length,
                requirements: filtered.requirements,
                metadata: parsed.metadata ?? { version: '1.0.0', format: 'projectx' },
            };
            console.log(JSON.stringify(output, null, 2));
            return;
        }
        printSpecTextRaw(specPath);
    }
}
export function registerSpecCommand(rootProgram) {
    const specCommand = rootProgram
        .command('spec')
        .description('Manage and view ProjectX specifications');
    // Deprecation notice for noun-based commands
    specCommand.hook('preAction', () => {
        console.error('Warning: The "projectx spec ..." commands are deprecated. Prefer verb-first commands (e.g., "projectx show", "projectx validate --specs").');
    });
    specCommand
        .command('show [spec-id]')
        .description('Display a specific specification')
        .option('--json', 'Output as JSON')
        .option('--requirements', 'JSON only: Show only requirements (exclude scenarios)')
        .option('--no-scenarios', 'JSON only: Exclude scenario content')
        .option('-r, --requirement <id>', 'JSON only: Show specific requirement by ID (1-based)')
        .option('--no-interactive', 'Disable interactive prompts')
        .action(async (specId, options) => {
        try {
            const cmd = new SpecCommand();
            await cmd.show(specId, options);
        }
        catch (error) {
            console.error(`Error: ${error instanceof Error ? error.message : 'Unknown error'}`);
            process.exitCode = 1;
        }
    });
    specCommand
        .command('list')
        .description('List all available specifications')
        .option('--json', 'Output as JSON')
        .option('--long', 'Show id and title with counts')
        .action((options) => {
        try {
            if (!existsSync(SPECS_DIR)) {
                console.log('No items found');
                return;
            }
            const specs = readdirSync(SPECS_DIR, { withFileTypes: true })
                .filter(dirent => dirent.isDirectory())
                .map(dirent => {
                const specPath = join(SPECS_DIR, dirent.name, 'spec.md');
                if (existsSync(specPath)) {
                    try {
                        const spec = parseSpecFromFile(specPath, dirent.name);
                        return {
                            id: dirent.name,
                            title: spec.name,
                            requirementCount: spec.requirements.length
                        };
                    }
                    catch {
                        return {
                            id: dirent.name,
                            title: dirent.name,
                            requirementCount: 0
                        };
                    }
                }
                return null;
            })
                .filter((spec) => spec !== null)
                .sort((a, b) => a.id.localeCompare(b.id));
            if (options.json) {
                console.log(JSON.stringify(specs, null, 2));
            }
            else {
                if (specs.length === 0) {
                    console.log('No items found');
                    return;
                }
                if (!options.long) {
                    specs.forEach(spec => console.log(spec.id));
                    return;
                }
                specs.forEach(spec => {
                    console.log(`${spec.id}: ${spec.title} [requirements ${spec.requirementCount}]`);
                });
            }
        }
        catch (error) {
            console.error(`Error: ${error instanceof Error ? error.message : 'Unknown error'}`);
            process.exitCode = 1;
        }
    });
    specCommand
        .command('validate [spec-id]')
        .description('Validate a specification structure')
        .option('--strict', 'Enable strict validation mode')
        .option('--json', 'Output validation report as JSON')
        .option('--no-interactive', 'Disable interactive prompts')
        .action(async (specId, options) => {
        try {
            if (!specId) {
                const canPrompt = isInteractive(options);
                const specIds = await getSpecIds();
                if (canPrompt && specIds.length > 0) {
                    const { select } = await import('@inquirer/prompts');
                    specId = await select({
                        message: 'Select a spec to validate',
                        choices: specIds.map(id => ({ name: id, value: id })),
                    });
                }
                else {
                    throw new Error('Missing required argument <spec-id>');
                }
            }
            const specPath = join(SPECS_DIR, specId, 'spec.md');
            if (!existsSync(specPath)) {
                throw new Error(`Spec '${specId}' not found at projectx/specs/${specId}/spec.md`);
            }
            const validator = new Validator(options.strict);
            const report = await validator.validateSpec(specPath);
            if (options.json) {
                console.log(JSON.stringify(report, null, 2));
            }
            else {
                if (report.valid) {
                    console.log(`Specification '${specId}' is valid`);
                }
                else {
                    console.error(`Specification '${specId}' has issues`);
                    report.issues.forEach(issue => {
                        const label = issue.level === 'ERROR' ? 'ERROR' : issue.level;
                        const prefix = issue.level === 'ERROR' ? '✗' : issue.level === 'WARNING' ? '⚠' : 'ℹ';
                        console.error(`${prefix} [${label}] ${issue.path}: ${issue.message}`);
                    });
                }
            }
            process.exitCode = report.valid ? 0 : 1;
        }
        catch (error) {
            console.error(`Error: ${error instanceof Error ? error.message : 'Unknown error'}`);
            process.exitCode = 1;
        }
    });
    return specCommand;
}
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