import {promises as fs} from 'fs';

if (process.argv.length !== 4) {
    if (process.env.RUN_FROM && process.env.RUN_FROM === 'PNPM') {
        console.log('Usage: pnpm run process-icons path_to_enum_input');
    } else {
        console.log('Usage: ts-node process-icons.ts path_for_styl_output path_to_enum_input');
    }
    process.exit(-1);
} else {
    run(process.argv[2], process.argv[3]);
}

async function run(iconComponentPath:string, iconLibraryPath:string) {
    const selectionFile = await fs.readFile(`${iconLibraryPath}/selection.json`);
    const iconFile = JSON.parse(selectionFile.toString());
    const {icons} = iconFile;
    const {metadata} = iconFile.preferences.fontPref;
    const version = `${metadata.fontFamily}-v${metadata.majorVersion}.${metadata.minorVersion}`;

    // enter name remap here
    const remappedNames:{[name:string]:string} = {
        // 'forward2': 'fast-forward'
    };

    const injectNames = ['right-arrow'];

    function remapName(name:string) {
        if (name in remappedNames) return remappedNames[name];
        return name;
    }

    const templateFile = await fs.readFile(`${iconComponentPath}/template.styl`);

    const tag = `// icons generated with process-icons.ts with font ${version}`;
    let styl:string = `${tag}\n\n`;
    styl += templateFile.toString();
    const iconStyls = icons.map((icon:any) => {
        const p = icon.properties;
        return `  &.${remapName(p.name)}::before\n    content: "\\${p.code.toString(16)}"\n`;
    });
    styl += iconStyls.join('\n');
    await fs.writeFile(`${iconComponentPath}/icon-font.styl`, styl);

    let iconNames = icons.map((icon:any) => icon.properties.name);
    iconNames = iconNames.concat(injectNames);
    const iconEnum = `${tag}

export enum Icons {
${iconNames.map((name: string) => `    '${remapName(name)}' = '${remapName(name)}'`).join(',\n')}
}

export type IconType = keyof typeof Icons;
`;
    await fs.writeFile(`${iconComponentPath}/icon.enum.ts`, iconEnum);

    console.log(`processed ${iconNames.length} icons from ${iconLibraryPath} to ${iconComponentPath}/...`);

    // copy font files to component dir
    const files = ['ffwd.woff', 'ffwd.ttf'];
    for (const file of files) await fs.copyFile(`${iconLibraryPath}/fonts/${file}`, `${iconComponentPath}/${file.replace('ffwd', 'ffwd-icons')}`);
    console.log(`copied files ${files.join(', ')} to component path`);
}