import fs from "node:fs";
import path from "node:path";
import { fileURLToPath } from "node:url";

const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);

/**
 * Generate TypeScript exports for Galaxy custom icons
 */
export function generateIconsTypeScript() {
    // Read the generated icons JSON
    const iconsJsonPath = path.resolve(__dirname, "../src/assets/icons.json");
    const outputPath = path.resolve(__dirname, "../src/components/icons/galaxyIcons.ts");

    if (!fs.existsSync(iconsJsonPath)) {
        console.error(`Icons JSON not found at ${iconsJsonPath}`);
        console.error("Run 'npm run icons' first to generate the icons JSON");
        return;
    }

    const iconsJson = fs.readFileSync(iconsJsonPath, "utf8");
    const icons = JSON.parse(iconsJson);

    // Generate TypeScript content
    let content = `import type { IconDefinition } from "@fortawesome/fontawesome-svg-core";

// Galaxy custom icons
// Generated from: client/src/assets/icons.json
// To regenerate: node icons/generate_ts_icons.js

// Matches FontAwesome's structure
export interface GalaxyIconDefinition {
    iconName: string;
    prefix: string;
    icon: [number, number, never[], string, string | string[]];
}

// Accepts both FA and Galaxy icons
export type IconLike = IconDefinition | GalaxyIconDefinition;

`;

    icons.forEach((icon) => {
        // Convert icon name to camelCase for JavaScript export
        const exportName = icon.iconName;

        // Format the icon data manually to match the expected style
        const iconData = icon.icon;
        const formattedIcon = `{
    iconName: "${icon.iconName}",
    prefix: "${icon.prefix}",
    icon: [
        ${iconData[0]},
        ${iconData[1]},
        [],
        "",
        [
            ${iconData[4].map((path) => `"${path}"`).join(",\n            ")},
        ],
    ],
};`;

        content += `export const ${exportName}: GalaxyIconDefinition = ${formattedIcon}

`;
    });

    // Write the TypeScript file
    fs.writeFileSync(outputPath, content.trimEnd() + "\n");
    console.log(`Generated Galaxy icons TypeScript exports at: ${outputPath}`);
    console.log(`Exported ${icons.length} icons: ${icons.map((i) => i.iconName).join(", ")}`);
}

// Run if called directly
if (import.meta.url === `file://${process.argv[1]}`) {
    generateIconsTypeScript();
}