#!/usr/bin/env node
/**
 * Postinstall: strip TypeScript optional-param syntax from flowbite-svelte dist files.
 *
 * flowbite-svelte ships raw .svelte files with `<script lang="ts">` in its dist.
 * esbuild (used by Vite's dep pre-bundler) cannot parse TypeScript optional params
 * like `(x?: string)` or `event?` in function signatures — it fails with
 * "Unexpected '?'" or "Expected ')' but found '?'" errors.
 *
 * The patches below remove only the TypeScript syntax that causes esbuild to fail.
 * The `?.` optional-chaining calls in function bodies are left untouched (those are
 * valid JavaScript and handle undefined correctly at runtime).
 *
 * This runs automatically via `"postinstall": "node scripts/postinstall.mjs"` and
 * is safe to re-run — the replacements are idempotent.
 */

import { readFileSync, writeFileSync, existsSync } from 'node:fs';
import { fileURLToPath } from 'node:url';
import { resolve } from 'node:path';

const root = fileURLToPath(new URL('..', import.meta.url));
const dist = resolve(root, 'node_modules/flowbite-svelte/dist');

if (!existsSync(dist)) {
    console.log('postinstall: flowbite-svelte dist not found, skipping.');
    process.exit(0);
}

let patched = 0;

function patch(relPath, from, to) {
    const file = resolve(dist, relPath);
    if (!existsSync(file)) return;
    const original = readFileSync(file, 'utf8');
    const updated = original.replace(from, to);
    if (updated !== original) {
        writeFileSync(file, updated, 'utf8');
        console.log(`  patched: ${relPath}`);
        patched++;
    }
}

// CommandPalette.svelte: (x?: string) => x?.toLowerCase()...
// Remove optional type annotation from the `check` helper param.
patch(
    'command-palette/CommandPalette.svelte',
    /\(x\?:\s*string\)/g,
    '(x)'
);

// ScrollSpy.svelte: function scrollToSection(itemId: string, event?: MouseEvent)
// Remove type annotations from both params.
patch(
    'scroll-spy/ScrollSpy.svelte',
    /scrollToSection\(itemId:\s*string,\s*event\?:\s*MouseEvent\)/g,
    'scrollToSection(itemId, event)'
);

// Datepicker.svelte: two functions with optional typed params + return-type annotations.
patch(
    'datepicker/Datepicker.svelte',
    /\(date\?:\s*Date\):\s*string/g,
    '(date)'
);
patch(
    'datepicker/Datepicker.svelte',
    /\(date1\?:\s*Date,\s*date2\?:\s*Date\):\s*boolean/g,
    '(date1, date2)'
);

console.log(`postinstall: flowbite-svelte — ${patched} file(s) patched.`);