#!/usr/bin/env node
/**
 * Validate that the unified Mana web app uses theme tokens instead of raw
 * Tailwind utilities that bypass the theme system.
 *
 * Background: the unified Mana app supports multiple theme variants (Lume,
 * Nature, Stone, Ocean, plus dark). Utilities like `text-white/80`,
 * `bg-gray-800`, `border-neutral-700` ignore the active theme and can
 * render white-on-white (or dark-on-dark) under the wrong variant. The
 * theme tokens (`text-foreground`, `bg-muted`, `border-border`, etc.) are
 * generated by Tailwind v4 from `packages/shared-tailwind/src/themes.css`
 * and resolve per-theme automatically.
 *
 * Rules (enforced across `apps/mana/apps/web/src/lib/modules/**` and
 * `apps/mana/apps/web/src/routes/(app)/**`):
 *
 *   1. No white-alpha utilities:
 *      `bg-white/N`, `text-white/N`, `border-white/N` (and hover:/focus:/etc. variants)
 *
 *   2. No neutral-palette utilities:
 *      `(bg|text|border)-(gray|slate|zinc|neutral|stone)-N` (with or without /N)
 *      — these should be theme tokens instead.
 *
 * Replacement cheat-sheet:
 *   bg-white/N         → bg-muted/N or bg-card
 *   text-white         → text-foreground
 *   text-white/40..60  → text-muted-foreground
 *   border-white/N     → border-border
 *   bg-gray-800        → bg-card or bg-muted
 *   bg-neutral-900     → bg-card
 *   text-gray-400      → text-muted-foreground
 *   text-slate-300     → text-foreground/90
 *   border-gray-700    → border-border
 *
 * Brand-literal escape hatch: if a color must stay literal (overlay on a
 * vivid gradient, photo viewer backdrop, domain-semantic palette), move
 * it into a scoped <style> block — the validator only scans class
 * attributes. See `lib/modules/moodlit/ListView.svelte:.mood-card:hover`
 * for the pattern.
 *
 * Zero deps — runs as plain Node ESM. Uses `git ls-files` to respect
 * .gitignore.
 */

import { execSync } from 'node:child_process';
import { readFileSync } from 'node:fs';
import { fileURLToPath } from 'node:url';
import { dirname, join } from 'node:path';

const __dirname = dirname(fileURLToPath(import.meta.url));
const REPO_ROOT = join(__dirname, '..');

const SCAN_GLOBS = [
	'apps/mana/apps/web/src/lib/modules/**/*.svelte',
	'apps/mana/apps/web/src/routes/(app)/**/*.svelte',
	'apps/cards/apps/web/src/lib/components/**/*.svelte',
	'apps/cards/apps/web/src/routes/**/*.svelte',
];

/**
 * Files where white-alpha utilities are intentional brand literals —
 * they render overlays on vivid mood-gradient backgrounds, not theme
 * surfaces. Exempt from the `white/` rule but still must follow the
 * neutral-palette rule.
 */
const BRAND_OVERLAY_FILES = new Set([
	'apps/mana/apps/web/src/lib/modules/moodlit/components/mood/MoodFullscreen.svelte',
	'apps/mana/apps/web/src/lib/modules/moodlit/components/mood/MoodCard.svelte',
	'apps/mana/apps/web/src/lib/modules/moodlit/components/mood/CreateMoodDialog.svelte',
]);

// `(?:^|[\s:"'`])` anchors so `hover:bg-white/5` and class=`bg-white/10`
// both match, without tripping on unrelated substrings like `off-white`.
const RULES = [
	{
		name: 'white-alpha',
		pattern: /(?:^|[\s:"'`])(bg|text|border)-white\/\d/g,
		describe: (m) => `${m[1]}-white/`,
	},
	{
		name: 'neutral-palette',
		pattern: /(?:^|[\s:"'`])(bg|text|border)-(gray|slate|zinc|neutral|stone)-\d/g,
		describe: (m) => `${m[1]}-${m[2]}-`,
	},
];

function listFiles() {
	const args = SCAN_GLOBS.map((g) => `"${g}"`).join(' ');
	const out = execSync(`git ls-files ${args}`, {
		cwd: REPO_ROOT,
		encoding: 'utf8',
	});
	return out
		.split('\n')
		.map((p) => p.trim())
		.filter(Boolean);
}

function validate() {
	const paths = listFiles();
	const violations = [];

	for (const rel of paths) {
		const abs = join(REPO_ROOT, rel);
		// Skip files that git knows about but haven't landed on disk yet —
		// common mid-rename/mid-move state in multi-terminal sessions.
		let src;
		try {
			src = readFileSync(abs, 'utf8');
		} catch {
			continue;
		}
		const lines = src.split('\n');

		const brandOverlay = BRAND_OVERLAY_FILES.has(rel);
		lines.forEach((line, i) => {
			for (const rule of RULES) {
				if (brandOverlay && rule.name === 'white-alpha') continue;
				rule.pattern.lastIndex = 0;
				let match;
				while ((match = rule.pattern.exec(line)) !== null) {
					violations.push({
						file: rel,
						line: i + 1,
						rule: rule.name,
						token: rule.describe(match),
						snippet: line.trim().slice(0, 120),
					});
				}
			}
		});
	}

	if (violations.length > 0) {
		// Group by file for readability.
		const byFile = new Map();
		for (const v of violations) {
			if (!byFile.has(v.file)) byFile.set(v.file, []);
			byFile.get(v.file).push(v);
		}
		console.error(
			`\n✗ Theme-token check FAILED (${violations.length} violation(s) in ${byFile.size} file(s)):\n`
		);
		for (const [file, vs] of byFile) {
			console.error(`  ${file} (${vs.length})`);
			for (const v of vs.slice(0, 5)) {
				console.error(`    :${v.line}  [${v.rule}: ${v.token}] ${v.snippet.slice(0, 80)}`);
			}
			if (vs.length > 5) console.error(`    … +${vs.length - 5} more`);
		}
		console.error(
			`\nReplace with theme tokens:\n` +
				`  bg-white/N          → bg-muted/N or bg-card\n` +
				`  text-white          → text-foreground\n` +
				`  text-white/40..60   → text-muted-foreground\n` +
				`  border-white/N      → border-border\n` +
				`  bg-gray/slate/neutral-N  → bg-muted / bg-card\n` +
				`  text-gray/slate-N        → text-foreground / text-muted-foreground\n` +
				`  border-gray/slate-N      → border-border\n\n` +
				`Rationale: raw color utilities ignore theme variants (Lume, Nature, ...)\n` +
				`and can render invisible under other themes. See\n` +
				`packages/shared-tailwind/src/themes.css for the full token set.\n` +
				`Brand-literal overlays may move into scoped <style> blocks.\n`
		);
		process.exit(1);
	}

	console.log(`✓ Theme-token check: ${paths.length} files use theme tokens correctly.`);
}

validate();