import chokidar from 'chokidar';
import { OrisonServer } from './server';
import { compileTypeScriptFiles } from './build';
import path from 'path';

export function watchPages(server: OrisonServer) {
    console.log('Starting file watcher...');
    const watcher = chokidar.watch('src/pages/**/*.tsx');
    watcher.on('change', async filePath => {
        filePath = filePath.replace(/\\/g, '/');
        console.log('Recompiling relevant files...');
        const result = await compileTypeScriptFiles(server.getSettings()!, [filePath]);
        const page = result.pages[0];
        const modulePath = require.resolve(path.relative(__dirname, path.join(process.cwd(), '.orison', 'pages', page.serverScriptPath + '_server')));

        delete require.cache[modulePath];
        server.setModuleDefinition(page.path, require(modulePath).default);
        if (page.clientScriptPath !== null) {
            server.setModuleDependencies(page.clientScriptPath, result.pageDependencies[page.clientScriptPath]);
        }
        console.log('Compiled.');
    });
}