// Vite config factories shared across webapp-template-derived projects.
//
// Derived projects typically have two bundles:
//   - the admin / owner SPA (`defineAdminConfig`)
//   - the public guest site  (`defineGuestConfig`)
// Both honour the same Apache-proxy-prefix baseUrl convention and keep
// their outputs under a conventional path so the `StaticController` and
// Apache vhost can serve them without per-project tweaks.

import type { UserConfig } from 'vite';
import react from '@vitejs/plugin-react';
import path from 'path';

export interface AdminConfigOptions {
    /** Directory the vite.config.ts lives in — pass `__dirname` or `import.meta.dirname`. */
    root: string;
    /** Optional manual chunks for large vendor libs. */
    vendorChunks?: Record<string, string[]>;
    /** Override the default output dir (default: `<root>/../static/dist`). */
    outDir?: string;
}

export function defineAdminConfig(opts: AdminConfigOptions): UserConfig {
    const base = process.env.VITE_BASE || '/';
    return {
        base,
        plugins: [react()],
        build: {
            outDir: opts.outDir ?? path.resolve(opts.root, '../static/dist'),
            emptyOutDir: true,
            manifest: true,
            rollupOptions: opts.vendorChunks
                ? { output: { manualChunks: opts.vendorChunks } }
                : undefined,
        },
    };
}

export interface GuestConfigOptions extends AdminConfigOptions {
    /** Entry point relative to root (default: `src/guest/main.tsx`). */
    entry?: string;
}

export function defineGuestConfig(opts: GuestConfigOptions): UserConfig {
    const base = process.env.VITE_BASE || '/';
    return {
        base,
        plugins: [react()],
        build: {
            outDir: opts.outDir ?? path.resolve(opts.root, '../static/guest/dist'),
            emptyOutDir: true,
            manifest: true,
            rollupOptions: {
                input: path.resolve(opts.root, opts.entry ?? 'src/guest/main.tsx'),
                output: {
                    entryFileNames: 'guest-app.[hash].js',
                    chunkFileNames: 'guest-chunk-[hash].js',
                    assetFileNames: 'guest-asset-[hash][extname]',
                    manualChunks: opts.vendorChunks,
                },
            },
        },
    };
}