import { afterEach, beforeEach, expect, it, vi } from 'vitest';
import { newFixture, type Fixture } from '../helpers/fixture.js';
import { prepareNativeHost } from '../helpers/native-host.js';
import { scalingSettings, type ScalingPolicy } from '../../src/lib/autoscaling.js';

let fixture: Fixture;
beforeEach(async () => { vi.resetModules(); fixture = await newFixture([]); });
afterEach(async () => { await fixture.cleanup(); });
const town = 't6_zombie_town_1', farm = 't6_zombie_farm_1';
const policy: ScalingPolicy = { ...scalingSettings({ game: 't6', mapSlug: 'town', maximum: 4, mode: 'dry-run' }), id: 'policy', revision: 1, nextActionAt: 0, pausedReason: null, updatedAt: '' };

it('separates variants, deduplicates pending identities, and initializes additive schema', async () => {
    await prepareNativeHost([town, farm]);
    const { db } = await import('../../src/lib/server/db/index.js');
    const { scalingSnapshot } = await import('../../src/lib/server/autoscaling/snapshot.js');
    const { ensureAutoscalingSchema } = await import('../../src/lib/server/autoscaling/schema.js');
    ensureAutoscalingSchema(db()); ensureAutoscalingSchema(db());
    const at = new Date().toISOString();
    for (const server of [town, farm]) db().prepare(`INSERT INTO servers(name,container_state,container_checked_at,last_seen_at,last_checked_at,last_players) VALUES(?,'running',?,?,?,0)`).run(server, at, at, at);
    expect(scalingSnapshot(policy).members.map(m => [m.name, m.state])).toEqual([[town, 'empty']]);
    db().prepare(`INSERT INTO server_deployments(id,server,action,state,stage,started_at,triggered_by) VALUES('create',?,'create','queued','Awaiting placement',?,'test')`).run(town, at);
    db().prepare(`INSERT INTO server_creation_jobs(deployment_id,server,game_mode,map_slug,expected_map) VALUES('create',?,'zombie','town','zm_transit')`).run(town);
    const snapshot = scalingSnapshot(policy);
    expect(snapshot.members).toHaveLength(1);
    expect(snapshot.members[0].state).toBe('creating');
    expect(snapshot.reservedNames).toEqual([town]);
});

it('does not create schema mutations or host work when planning an empty map', async () => {
    const { db } = await import('../../src/lib/server/db/index.js');
    const { scalingSnapshot } = await import('../../src/lib/server/autoscaling/snapshot.js');
    const { planScaling } = await import('../../src/lib/server/autoscaling/planner.js');
    db().prepare('INSERT INTO server_keys(server_id,pluto_key) VALUES(?,?)').run('t6_zombie_town_8', 'private-key');
    expect(planScaling(policy, scalingSnapshot(policy), Date.now()).server).toBe('t6_zombie_town_8');
    expect(db().prepare('SELECT COUNT(*) AS n FROM server_deployments').get()).toEqual({ n: 0 });
});