import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
import { newFixture, type Fixture } from '../helpers/fixture.js';

let fixture: Fixture;

beforeEach(async () => {
    vi.resetModules();
    fixture = await newFixture(['t5_zombie_theater_1', 't5_zombie_cosmodrome_1']);
    // Provisioning must retain queued work while integrations are unset.
    delete process.env.KOMODO_ADDRESS;
    delete process.env.RCON_PASSWORD;
});

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

describe('sweep', () => {
    it('emits server state only when state, players, or error changes', async () => {
        const { sweep } = await import('../../src/lib/server/pipeline/sweep.js');
        const { seedServerRegistry } = await import('../../src/lib/server/fleet/servers.js');
        const { db } = await import('../../src/lib/server/db/index.js');
        const { subscribe } = await import('../../src/lib/server/pipeline/bus.js');
        await seedServerRegistry();
        db().prepare("INSERT INTO deployments (id, action, started_at, triggered_by) VALUES ('changes', 'test', ?, 'ui')")
            .run(new Date().toISOString());
        db().prepare(`INSERT INTO deployment_servers (deployment_id, server, files_changed, restart_state)
            VALUES ('changes', 't5_zombie_theater_1', 1, 'pending')`).run();
        const events = vi.fn();
        const unsubscribe = subscribe(event => { if (event.type === 'server-state') events(event); });
        try {
            await sweep();
            expect(events).toHaveBeenCalledTimes(1);
            await sweep();
            expect(events).toHaveBeenCalledTimes(1);

            // Fresh check timestamps still update the campaign, without an SSE event.
            const checkedAt = new Date().toISOString();
            db().prepare('UPDATE server_deployments SET checked_at = ?').run(checkedAt);
            await sweep();
            expect(events).toHaveBeenCalledTimes(1);
            expect(db().prepare("SELECT checked_at, attempts FROM deployment_servers WHERE deployment_id = 'changes'").get())
                .toEqual({ checked_at: checkedAt, attempts: 1 });

            db().prepare('UPDATE server_deployments SET players = 2').run();
            await sweep();
            expect(events).toHaveBeenCalledTimes(2);
            expect(events).toHaveBeenLastCalledWith(expect.objectContaining({ state: 'pending', players: 2 }));
            db().prepare("UPDATE server_deployments SET error = 'Waiting for players'").run();
            await sweep();
            expect(events).toHaveBeenCalledTimes(3);
            expect(events).toHaveBeenLastCalledWith(expect.objectContaining({ error: 'Waiting for players' }));
            db().prepare("UPDATE server_deployments SET state = 'failed'").run();
            await sweep();
            expect(events).toHaveBeenCalledTimes(4);
            expect(events).toHaveBeenLastCalledWith(expect.objectContaining({ state: 'failed' }));
            await sweep();
            expect(events).toHaveBeenCalledTimes(4);
            db().prepare("UPDATE server_deployments SET state = 'done'").run();
            await sweep();
            expect(events).toHaveBeenCalledTimes(5);
            expect(events).toHaveBeenLastCalledWith(expect.objectContaining({ state: 'done', error: null }));
        } finally { unsubscribe(); }
    });

    it('queues pending rows in Provisioning even when integrations are unset', async () => {
        const { sweep } = await import('../../src/lib/server/pipeline/sweep.js');
        const { seedServerRegistry } = await import('../../src/lib/server/fleet/servers.js');
        const { db } = await import('../../src/lib/server/db/index.js');
        await seedServerRegistry();

        const depId = 'dep-test-001';
        db().prepare("INSERT INTO deployments (id, action, started_at, triggered_by) VALUES (?, 'test', ?, 'ui')")
            .run(depId, new Date().toISOString());
        db()
            .prepare(
                "INSERT INTO deployment_servers (deployment_id, server, files_changed, restart_state, attempts) VALUES (?, ?, 1, 'pending', 0)"
            )
            .run(depId, 't5_zombie_theater_1');
        db()
            .prepare(
                "INSERT INTO deployment_servers (deployment_id, server, files_changed, restart_state, attempts) VALUES (?, ?, 1, 'pending', 0)"
            )
            .run(depId, 't5_zombie_cosmodrome_1');

        await sweep();
        const { processProvisioning } = await import('../../src/lib/server/provisioning/worker.js');
        await processProvisioning();
        await sweep();

        const rows = db()
            .prepare("SELECT restart_state FROM deployment_servers WHERE deployment_id = ?")
            .all(depId) as Array<{ restart_state: string }>;
        expect(rows.length).toBe(2);
        for (const r of rows) expect(r.restart_state).toBe('pending');
        const operations = db().prepare('SELECT state, stage FROM server_deployments').all();
        expect(operations).toHaveLength(2);
        for (const operation of operations) expect(operation).toEqual({ state: 'waiting', stage: 'Waiting for Komodo and RCON configuration' });
    });

    it('is a no-op when nothing is pending', async () => {
        const { sweep } = await import('../../src/lib/server/pipeline/sweep.js');
        const { seedServerRegistry } = await import('../../src/lib/server/fleet/servers.js');
        await seedServerRegistry();

        const result = await sweep();
        expect(result).toEqual({ checked: 0, restarted: 0, healthy: 0, held: 0, failed: 0 });
    });
});