import { describe, it, expect, beforeEach, afterEach, vi } from 'vitest'
import { setActivePinia, createPinia } from 'pinia'
import { useSourcesStore } from '../src/stores/sources.js'

function stubFetch(handler) {
  globalThis.fetch = vi.fn(async (url, init) => {
    const { status, body } = handler(url, init)
    return {
      ok: status >= 200 && status < 300,
      status, statusText: String(status),
      text: async () => (body == null ? '' : JSON.stringify(body)),
    }
  })
}

describe('sources store', () => {
  beforeEach(() => setActivePinia(createPinia()))
  afterEach(() => vi.restoreAllMocks())

  it('loadAll caches under the "all" key', async () => {
    const s = useSourcesStore()
    stubFetch(() => ({
      status: 200,
      body: [{ id: 1, artist_id: 5, artist_name: 'Alice', artist_slug: 'alice',
               platform: 'patreon', url: 'https://p/a', enabled: true,
               config_overrides: null, last_checked_at: null,
               last_error: null, check_interval_override: null }],
    }))
    await s.loadAll()
    expect(s.allSources.map(r => r.id)).toEqual([1])
  })

  it('loadForArtist filters by artist_id', async () => {
    const s = useSourcesStore()
    const calls = []
    stubFetch((url) => {
      calls.push(url)
      return { status: 200, body: [] }
    })
    await s.loadForArtist(7)
    expect(calls[0]).toContain('artist_id=7')
  })

  it('update patches the source in place without dropping the cache', async () => {
    const s = useSourcesStore()
    s.byArtist.set(null, [
      { id: 5, artist_id: 5, enabled: true, backfill_state: null },
      { id: 6, artist_id: 5, enabled: true },
    ])
    stubFetch(() => ({
      status: 200,
      body: { id: 5, artist_id: 5, enabled: false, backfill_state: null },
    }))
    await s.update(5, { enabled: false }, 5)
    // Cache survives (no full reload) and only source 5 changed.
    expect(s.byArtist.has(null)).toBe(true)
    const arr = s.byArtist.get(null)
    expect(arr.find(r => r.id === 5).enabled).toBe(false)
    expect(arr.find(r => r.id === 6).enabled).toBe(true)
  })

  it('startBackfill patches backfill_state in place', async () => {
    const s = useSourcesStore()
    s.byArtist.set(null, [{ id: 5, artist_id: 5, backfill_state: null }])
    stubFetch(() => ({ status: 200, body: { id: 5, backfill_state: 'running' } }))
    await s.startBackfill(5, 5)
    expect(s.byArtist.get(null).find(r => r.id === 5).backfill_state).toBe('running')
  })

  it('remove drops the source from the cache in place', async () => {
    const s = useSourcesStore()
    s.byArtist.set(null, [{ id: 5, artist_id: 5 }, { id: 6, artist_id: 5 }])
    stubFetch(() => ({ status: 204, body: null }))
    await s.remove(5, 5)
    expect(s.byArtist.has(null)).toBe(true)
    expect(s.byArtist.get(null).map(r => r.id)).toEqual([6])
  })

  it('create invalidates the all-cache and the artist-cache', async () => {
    const s = useSourcesStore()
    s.byArtist.set(null, [])
    s.byArtist.set(5, [])
    stubFetch(() => ({
      status: 201,
      body: { id: 1, artist_id: 5, artist_name: 'Alice', artist_slug: 'alice',
              platform: 'patreon', url: 'https://p/a', enabled: true,
              config_overrides: null, last_checked_at: null,
              last_error: null, check_interval_override: null },
    }))
    await s.create({ artist_id: 5, platform: 'patreon', url: 'https://p/a' })
    expect(s.byArtist.has(null)).toBe(false)
    expect(s.byArtist.has(5)).toBe(false)
  })

  it('findOrCreateArtist posts to /api/artists', async () => {
    const s = useSourcesStore()
    const calls = []
    stubFetch((url, init) => {
      calls.push({ url, body: init.body ? JSON.parse(init.body) : null })
      return { status: 201, body: { id: 1, name: 'Alice', slug: 'alice', created: true } }
    })
    const out = await s.findOrCreateArtist('Alice')
    expect(out.artist.name).toBe('Alice')
    expect(out.created).toBe(true)
    expect(calls[0].body).toEqual({ name: 'Alice' })
  })

  it('autocompleteArtist hits /api/artists/autocomplete', async () => {
    const s = useSourcesStore()
    const urls = []
    stubFetch((url) => { urls.push(url); return { status: 200, body: [] } })
    await s.autocompleteArtist('al')
    expect(urls[0]).toContain('/api/artists/autocomplete')
    expect(urls[0]).toContain('q=al')
  })

  it('checkNow posts to /api/sources/<id>/check', async () => {
    const s = useSourcesStore()
    const calls = []
    stubFetch((url, init) => {
      calls.push({ url, method: init?.method, body: init?.body ? JSON.parse(init.body) : null })
      return { status: 202, body: { download_event_id: 7, status: 'pending' } }
    })
    const out = await s.checkNow(5)
    expect(calls[0].url).toBe('/api/sources/5/check')
    expect(calls[0].method).toBe('POST')
    expect(out.download_event_id).toBe(7)
  })

  it('checkNow exposes the 409 download_event_id via error.body', async () => {
    const s = useSourcesStore()
    stubFetch(() => ({ status: 409, body: { download_event_id: 12, status: 'already_running' } }))
    try {
      await s.checkNow(5)
    } catch (e) {
      expect(e.body?.download_event_id).toBe(12)
      return
    }
    throw new Error('Expected checkNow to throw on 409')
  })
})
