import { execSync } from 'node:child_process';
import { existsSync, readFileSync } from 'node:fs';
import { sveltekit } from '@sveltejs/kit/vite';
import { defineConfig } from 'vitest/config';

/** Current commit. Uses git when available, else reads .git directly (the Docker build has no git binary). */
function gitCommit(): { commit: string; dirty: boolean } {
	if (process.env.GIT_COMMIT) return { commit: process.env.GIT_COMMIT, dirty: false };
	try {
		const commit = execSync('git rev-parse HEAD', { stdio: ['ignore', 'pipe', 'ignore'] }).toString().trim();
		const dirty = execSync('git status --porcelain --untracked-files=no', { stdio: ['ignore', 'pipe', 'ignore'] }).toString().trim() !== '';
		return { commit, dirty };
	} catch {
		/* fall through */
	}
	try {
		const head = readFileSync('.git/HEAD', 'utf8').trim();
		if (!head.startsWith('ref: ')) return { commit: head, dirty: false };
		const ref = head.slice(5);
		if (existsSync(`.git/${ref}`)) return { commit: readFileSync(`.git/${ref}`, 'utf8').trim(), dirty: false };
		const packed = readFileSync('.git/packed-refs', 'utf8').split('\n').find((l) => l.endsWith(` ${ref}`));
		if (packed) return { commit: packed.split(' ')[0], dirty: false };
	} catch {
		/* no repository */
	}
	return { commit: 'unknown', dirty: false };
}

const build = {
	version: JSON.parse(readFileSync('package.json', 'utf8')).version as string,
	...gitCommit(),
	time: new Date().toISOString()
};

export default defineConfig({
	plugins: [sveltekit()],
	define: { __BUILD__: JSON.stringify(build) },
	test: {
		include: ['src/**/*.test.ts'],
		environment: 'node'
	}
});