import { afterEach, expect, it, vi } from 'vitest';
import { campaignOutcome, campaignServerStatus, campaignTitle, fetchCampaigns } from '../../src/lib/ui/campaigns.js';

afterEach(() => vi.unstubAllGlobals());

it('names campaigns with their script or beta and gives maintenance a readable title', () => {
    const campaign = { action: 'promote', beta_id: 74, rolled_back_by: null, script_name: null, script_version: null, scripts: [], servers: [] };
    expect(campaignTitle(campaign)).toBe('Promote · Beta #74');
    expect(campaignTitle({ ...campaign, scripts: [{ script_name: 'Double Tap', script_version: 2 }] })).toBe('Promote · Double Tap v2');
    expect(campaignTitle({ ...campaign, scripts: Array(7).fill({ script_name: null, script_version: null }) })).toBe('Promote · 7 scripts');
    expect(campaignTitle({ ...campaign, action: 'rollback' })).toBe('Rollback · Beta #74');
    expect(campaignTitle({ ...campaign, action: 'drift' })).toBe('Maintenance repair');
});

it('summarizes progress without letting deleted servers create false alarms or false completion', () => {
    const campaign = { rolled_back_by: null, servers: [{ restart_state: 'done' }, { restart_state: 'failed', server_deleted_at: '2026-10-06' }] };
    expect(campaignOutcome(campaign)).toMatchObject({ status: 'inactive', label: '1/2 complete', tone: 'neutral' });
    expect(campaignOutcome({ ...campaign, servers: [{ restart_state: 'done' }, { restart_state: 'pending' }] })).toMatchObject({ status: 'progress', label: '1/2 complete', completed: 1 });
    expect(campaignOutcome({ ...campaign, servers: [{ restart_state: 'failed' }] })).toMatchObject({ status: 'attention', tone: 'danger' });
    expect(campaignOutcome({ ...campaign, servers: [{ restart_state: 'held' }] })).toMatchObject({ status: 'attention', tone: 'warning' });
    expect(campaignOutcome({ ...campaign, rolled_back_by: 'rollback' })).toMatchObject({ status: 'rolled-back', label: 'Rolled back' });
});

it('distinguishes queued work, file application, and health verification without treating stage messages as failures', () => {
    const server = { restart_state: 'pending', restarted_at: null, error: 'Queued to restart; waiting for another server to recover' };
    expect(campaignServerStatus(server, [{ apply_state: 'pending' }])).toEqual({ group: 'queued', label: 'Queued', tone: 'neutral' });
    expect(campaignServerStatus(server, [{ apply_state: 'applying' }])).toMatchObject({ group: 'processing', label: 'Applying files' });
    const verifying = { ...server, restarted_at: '2026-10-06T20:08:29Z', error: 'Checking container state with host agent' };
    expect(campaignServerStatus(verifying, [{ apply_state: 'applied' }]))
        .toEqual({ group: 'processing', label: 'Verifying health', tone: 'info' });
});

it.each(['failed', 'held', 'manual'])('keeps %s servers needing intervention ahead of ordinary progress', restart_state => {
    expect(campaignServerStatus({ restart_state, restarted_at: '2026-10-06T20:08:29Z' }, [{ apply_state: 'applying' }]))
        .toMatchObject({ group: 'attention', tone: restart_state === 'failed' ? 'danger' : 'warning' });
});

it('preserves completed and inactive outcomes without asking users to intervene on deleted servers', () => {
    const server = { restart_state: 'done', restarted_at: '2026-10-06T20:08:29Z' };
    expect(campaignServerStatus(server)).toMatchObject({ group: 'complete', label: 'Complete' });
    for (const restart_state of ['skipped', 'cancelled']) {
        expect(campaignServerStatus({ ...server, restart_state })).toMatchObject({ group: 'inactive', tone: 'neutral' });
    }
    const deleted = { ...server, server_deleted_at: '2026-10-06T21:00:00Z' };
    expect(campaignServerStatus(deleted)).toMatchObject({ group: 'complete' });
    expect(campaignServerStatus({ ...deleted, restart_state: 'failed' })).toEqual({ group: 'inactive', label: 'Deleted before activation', tone: 'neutral' });
});

it('loads history beyond the API page limit without truncating or fetching unwanted older rows', async () => {
    const requests: URL[] = [];
    vi.stubGlobal('fetch', vi.fn(async (input: string) => {
        const url = new URL(input, 'http://localhost');
        requests.push(url);
        const start = Number(url.searchParams.get('offset'));
        const count = Number(url.searchParams.get('limit'));
        return Response.json({ total: 900, deployments: Array.from({ length: count }, (_, i) => ({ id: start + i })) });
    }));
    const result = await fetchCampaigns<{ id: number }>({ server: 'test-server', view: 'history' }, 525);
    expect(result.total).toBe(900);
    expect(result.deployments.map(row => row.id)).toEqual(Array.from({ length: 525 }, (_, i) => i));
    expect(requests.map(url => Object.fromEntries(url.searchParams))).toEqual([
        { server: 'test-server', view: 'history', offset: '0', limit: '500' },
        { server: 'test-server', view: 'history', offset: '500', limit: '25' }
    ]);
});

it('loads all active campaigns independently of the history limit', async () => {
    vi.stubGlobal('fetch', vi.fn(async (input: string) => {
        const url = new URL(input, 'http://localhost');
        const start = Number(url.searchParams.get('offset'));
        return Response.json({ total: 550, deployments: Array.from({ length: start ? 50 : 500 }, (_, i) => ({ id: start + i })) });
    }));
    const result = await fetchCampaigns<{ id: number }>({ active: 'true' }, Infinity);
    expect(result.deployments).toHaveLength(550);
    expect(result.deployments[549].id).toBe(549);
});