import { expect } from 'chai'
import { createTestApp, cleanTestDir, createFile } from './helpers.js'

describe('PATCH', () => {
  let request, testDir

  beforeEach(() => {
    ({ request, testDir } = createTestApp())
  })

  afterEach(() => cleanTestDir(testDir))

  describe('SPARQL UPDATE', () => {
    it('inserts data into a new resource (201)', async () => {
      const patch = `
        PREFIX dc: <http://purl.org/dc/terms/>
        INSERT DATA { <> dc:title "Test" . }
      `
      await request.patch('/new.ttl')
        .set('Content-Type', 'application/sparql-update')
        .send(patch)
        .expect(201)
    })

    it('inserts data into an existing resource (200)', async () => {
      createFile(testDir, 'existing.ttl', '<http://example.org/s> <http://example.org/p> "old".')
      const patch = `
        PREFIX ex: <http://example.org/>
        INSERT DATA { ex:s ex:q "new" . }
      `
      await request.patch('/existing.ttl')
        .set('Content-Type', 'application/sparql-update')
        .send(patch)
        .expect(200)
    })

    it('deletes and inserts (atomic replace)', async () => {
      createFile(testDir, 'replace.ttl', '<http://example.org/s> <http://example.org/p> "old".')
      const patch = `
        PREFIX ex: <http://example.org/>
        DELETE { ex:s ex:p "old" . }
        INSERT { ex:s ex:p "new" . }
      `
      await request.patch('/replace.ttl')
        .set('Content-Type', 'application/sparql-update')
        .send(patch)
        .expect(200)
    })
  })

  describe('N3 Patch', () => {
    it('inserts triples into a new resource (201)', async () => {
      const patch = `
        @prefix solid: <http://www.w3.org/ns/solid/terms#>.
        <> a solid:InsertDeletePatch;
           solid:inserts { <http://example.org/s> <http://example.org/p> "value". }.
      `
      await request.patch('/n3new.ttl')
        .set('Content-Type', 'text/n3')
        .send(patch)
        .expect(201)
    })

    it('inserts triples into existing resource (200)', async () => {
      createFile(testDir, 'n3exist.ttl', '<http://example.org/s> <http://example.org/p> "old".')
      const patch = `
        @prefix solid: <http://www.w3.org/ns/solid/terms#>.
        <> a solid:InsertDeletePatch;
           solid:inserts { <http://example.org/s> <http://example.org/q> "new". }.
      `
      await request.patch('/n3exist.ttl')
        .set('Content-Type', 'text/n3')
        .send(patch)
        .expect(200)
    })

    it('returns 409 when deleting non-existent triple', async () => {
      createFile(testDir, 'n3del.ttl', '<http://example.org/s> <http://example.org/p> "exists".')
      const patch = `
        @prefix solid: <http://www.w3.org/ns/solid/terms#>.
        <> a solid:InsertDeletePatch;
           solid:deletes { <http://example.org/s> <http://example.org/p> "nope". }.
      `
      await request.patch('/n3del.ttl')
        .set('Content-Type', 'text/n3')
        .send(patch)
        .expect(409)
    })

    it('returns 400 for missing insert/delete', async () => {
      const patch = `
        @prefix solid: <http://www.w3.org/ns/solid/terms#>.
        <> a solid:InsertDeletePatch.
      `
      await request.patch('/bad.ttl')
        .set('Content-Type', 'text/n3')
        .send(patch)
        .expect(400)
    })
  })

  it('returns 415 for unsupported patch type', async () => {
    await request.patch('/file.ttl')
      .set('Content-Type', 'text/plain')
      .send('something')
      .expect(415)
  })
})