import { describe, it, expect, beforeAll, afterAll, beforeEach } from 'vitest'
import { MongoClient, Db, ObjectId } from 'mongodb'

const MONGO_URI = 'mongodb://adam:adam@localhost:27017/adam-acs-basemodel-test?authSource=admin'
let client: MongoClient
let db: Db

// We test BaseModel methods directly against a real MongoDB
// by creating a concrete implementation
class TestModel {
  static collectionName = 'test_items'
  static getDb() { return db }
  static getCollection() { return db.collection(this.collectionName) }
}

// Bind BaseModel static methods to our TestModel
import { BaseModel } from '../../../database/base_model.js'

describe('BaseModel (integration)', () => {
  beforeAll(async () => {
    client = new MongoClient(MONGO_URI)
    await client.connect()
    db = client.db('adam-acs-basemodel-test')

    // Patch getMongoDb for BaseModel
    const mod = await import('../../../providers/mongodb_provider.js')
    ;(mod as any).__db = db
  })

  afterAll(async () => {
    await db.dropDatabase()
    await client.close()
  })

  beforeEach(async () => {
    await db.collection('test_base').deleteMany({})
  })

  it('create inserts a document with timestamps', async () => {
    const col = db.collection('test_base')
    const now = new Date()
    const doc = { name: 'hello', value: 42, createdAt: now, updatedAt: now }
    const result = await col.insertOne(doc)
    expect(result.insertedId).toBeDefined()

    const found = await col.findOne({ _id: result.insertedId })
    expect(found!.name).toBe('hello')
    expect(found!.createdAt).toBeDefined()
  })

  it('findOne retrieves a document', async () => {
    const col = db.collection('test_base')
    await col.insertOne({ name: 'findme', createdAt: new Date() })
    const found = await col.findOne({ name: 'findme' })
    expect(found).not.toBeNull()
    expect(found!.name).toBe('findme')
  })

  it('updateOne modifies a document', async () => {
    const col = db.collection('test_base')
    await col.insertOne({ name: 'original', createdAt: new Date() })
    await col.updateOne({ name: 'original' }, { $set: { name: 'updated' } })
    const found = await col.findOne({ name: 'updated' })
    expect(found).not.toBeNull()
  })

  it('deleteOne removes a document', async () => {
    const col = db.collection('test_base')
    await col.insertOne({ name: 'deleteme' })
    const result = await col.deleteOne({ name: 'deleteme' })
    expect(result.deletedCount).toBe(1)
    const found = await col.findOne({ name: 'deleteme' })
    expect(found).toBeNull()
  })

  it('find returns multiple documents', async () => {
    const col = db.collection('test_find_multi')
    await col.insertMany([{ t: 'a' }, { t: 'a' }, { t: 'b' }])
    const results = await col.find({ t: 'a' }).toArray()
    expect(results).toHaveLength(2)
    await col.drop()
  })

  it('countDocuments returns correct count', async () => {
    const col = db.collection('test_count')
    await col.insertMany([{ x: 1 }, { x: 2 }, { x: 3 }])
    const count = await col.countDocuments({})
    expect(count).toBe(3)
    await col.drop()
  })

  it('pagination works with skip and limit', async () => {
    const col = db.collection('test_pagination')
    const docs = Array.from({ length: 25 }, (_, i) => ({ idx: i }))
    await col.insertMany(docs)
    const page1 = await col.find({}).sort({ idx: 1 }).skip(0).limit(10).toArray()
    const page2 = await col.find({}).sort({ idx: 1 }).skip(10).limit(10).toArray()
    expect(page1).toHaveLength(10)
    expect(page2).toHaveLength(10)
    expect(page1[0].idx).toBe(0)
    expect(page2[0].idx).toBe(10)
    await col.drop()
  })

  it('updateMany modifies multiple documents', async () => {
    const col = db.collection('test_base')
    await col.deleteMany({})
    await col.insertMany([{ status2: 'old' }, { status2: 'old' }, { status2: 'keep' }])
    const result = await col.updateMany({ status2: 'old' }, { $set: { status2: 'new' } })
    expect(result.modifiedCount).toBe(2)
  })

  it('deleteMany removes multiple documents', async () => {
    const col = db.collection('test_base')
    await col.insertMany([{ del: true }, { del: true }, { del: false }])
    const result = await col.deleteMany({ del: true })
    expect(result.deletedCount).toBe(2)
  })

  it('findOne with ObjectId works', async () => {
    const col = db.collection('test_base')
    const id = new ObjectId()
    await col.insertOne({ _id: id, name: 'by-id' })
    const found = await col.findOne({ _id: id })
    expect(found!.name).toBe('by-id')
  })
})