import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
import { readFile } from 'node:fs/promises';
import { join } from 'node:path';
import { newFixture, type Fixture } from '../helpers/fixture.js';

let fixture: Fixture;

beforeEach(async () => {
    vi.resetModules();
    fixture = await newFixture(
        {
            'hud.gsc': 'v1',
            'zom.gsc': 'v1',
            'perks/perk1.gsc': 'p1'
        },
        ['t5_kino_1', 't5_ascension_1']
    );
});

afterEach(async () => {
    await fixture.cleanup();
});

describe('doPush', () => {
    it('adds every source file on a fresh server', async () => {
        const { doPush } = await import('../../src/lib/server/fleet/push.js');
        const { seedServerRegistry } = await import('../../src/lib/server/fleet/servers.js');
        await seedServerRegistry();

        const res = await doPush({ patterns: ['*'], dryRun: false, create: false });
        expect(res.totalChangedServers).toBe(2);
        expect(res.totalFiles).toBe(3 * 2);
        expect(res.deploymentId).toBeTruthy();

        const written = await readFile(join(fixture.t5, 't5_kino_1', 'runtime/plutonium/storage/t5/raw/scripts/sp/hud.gsc'), 'utf8');
        expect(written).toBe('v1');
    });

    it('dry-run makes no changes and creates no deployment row', async () => {
        const { doPush } = await import('../../src/lib/server/fleet/push.js');
        const { seedServerRegistry } = await import('../../src/lib/server/fleet/servers.js');
        await seedServerRegistry();

        const res = await doPush({ patterns: ['*'], dryRun: true, create: false });
        expect(res.deploymentId).toBeNull();
        expect(res.totalChangedServers).toBe(2);

        // no file created
        await expect(readFile(join(fixture.t5, 't5_kino_1', 'runtime/plutonium/storage/t5/raw/scripts/sp/hud.gsc'))).rejects.toThrow();
    });

    it('skips servers that are already up to date', async () => {
        const { doPush } = await import('../../src/lib/server/fleet/push.js');
        const { seedServerRegistry } = await import('../../src/lib/server/fleet/servers.js');
        await seedServerRegistry();
        await doPush({ patterns: ['*'], dryRun: false });

        // second run: everything matches → no deployment
        const res = await doPush({ patterns: ['*'], dryRun: false });
        expect(res.deploymentId).toBeNull();
        expect(res.totalChangedServers).toBe(0);
    });
});