import adminXViteConfig from '@tryghost/admin-x-framework/vite';
import pkg from './package.json';
import {resolve} from 'path';
import fs from 'fs';

const GHOST_CARDS_PATH = resolve(__dirname, '../../ghost/core/core/frontend/src/cards');

const validateCardsDirectoryPlugin = (cardsPath) => {
    return {
        name: 'validate-cards-directory',
        buildStart() {
            const jsPath = resolve(cardsPath, 'js');
            const cssPath = resolve(cardsPath, 'css');

            if (!fs.existsSync(cardsPath)) {
                throw new Error(`Ghost cards directory not found at: ${cardsPath}`);
            }

            if (!fs.existsSync(jsPath)) {
                throw new Error(`Ghost cards JS directory not found at: ${jsPath}`);
            }

            if (!fs.existsSync(cssPath)) {
                throw new Error(`Ghost cards CSS directory not found at: ${cssPath}`);
            }

            const jsFiles = fs.readdirSync(jsPath).filter(f => f.endsWith('.js'));
            const cssFiles = fs.readdirSync(cssPath).filter(f => f.endsWith('.css'));

            if (jsFiles.length === 0) {
                throw new Error(`No JavaScript files found in Ghost cards directory: ${jsPath}`);
            }

            if (cssFiles.length === 0) {
                throw new Error(`No CSS files found in Ghost cards directory: ${cssPath}`);
            }

            console.log(`✓ Found ${jsFiles.length} JS and ${cssFiles.length} CSS card files at: ${cardsPath}`);
        }
    };
};

export default (function viteConfig() {
    const config = adminXViteConfig({
        packageName: pkg.name,
        entry: resolve(__dirname, 'src/index.tsx'),
        overrides: {
            test: {
                include: [
                    './test/unit/**/*',
                    './src/**/*.test.ts'
                ]
            },
            resolve: {
                alias: {
                    '@src': resolve(__dirname, './src'),
                    '@assets': resolve(__dirname, './src/assets'),
                    '@components': resolve(__dirname, './src/components'),
                    '@hooks': resolve(__dirname, './src/hooks'),
                    '@utils': resolve(__dirname, './src/utils'),
                    '@views': resolve(__dirname, './src/views'),
                    '@ghost-cards': GHOST_CARDS_PATH
                }
            },
            plugins: [
                validateCardsDirectoryPlugin(GHOST_CARDS_PATH)
            ]
        }
    });

    return config;
});