/**
 * Drift State Verifier - Position Verification Tests
 * 
 * Tests for Bug #82 long-term fix: Comprehensive position identity verification
 * before attempting automatic close of orphaned positions.
 * 
 * Created: Dec 10, 2025
 */

import { describe, it, expect, beforeEach, afterEach, jest } from '@jest/globals'
import type { Mock } from 'jest-mock'

// Mock dependencies
const mockDriftService = {
  getPosition: jest.fn(),
}

const mockPrisma = {
  trade: {
    findUnique: jest.fn(),
    findMany: jest.fn(),
    findFirst: jest.fn(),
    update: jest.fn(),
  },
}

const mockClosePosition = jest.fn()
const mockSendTelegramMessage = jest.fn()

jest.mock('../../../lib/drift/client', () => ({
  getDriftService: jest.fn(() => Promise.resolve(mockDriftService)),
}))

jest.mock('../../../lib/database/trades', () => ({
  getPrismaClient: jest.fn(() => mockPrisma),
}))

jest.mock('../../../lib/drift/orders', () => ({
  closePosition: mockClosePosition,
}))

jest.mock('../../../lib/notifications/telegram', () => ({
  sendTelegramMessage: mockSendTelegramMessage,
}))

// Import DriftStateVerifier after mocks are set up
// NOTE: Actual import will need to be added based on your export structure

describe('Drift State Verifier - Position Verification', () => {
  beforeEach(() => {
    // Reset all mocks before each test
    jest.clearAllMocks()
  })

  describe('CRITICAL: Active Position Protection', () => {
    it('should NOT close position when newer trade exists in database', async () => {
      // Scenario: User opened new position AFTER the DB record we're checking
      const oldTradeExitTime = new Date('2025-12-10T10:00:00Z')
      const newTradeCreatedTime = new Date('2025-12-10T10:15:00Z')

      mockPrisma.trade.findUnique.mockResolvedValue({
        id: 'old-trade-123',
        symbol: 'SOL-PERP',
        direction: 'long',
        entryTime: new Date('2025-12-10T09:00:00Z'),
        exitTime: oldTradeExitTime,
        exitReason: 'SL',
        positionSizeUSD: 8000,
        entryPrice: 140.0,
        configSnapshot: {},
      })

      mockDriftService.getPosition.mockResolvedValue({
        size: 15.45, // SOL tokens
        entryPrice: 142.5, // Different price = new position!
        unrealizedPnL: 45.2,
        side: 'long',
      })

      // KEY: Database shows newer open trade
      mockPrisma.trade.findMany.mockResolvedValue([
        {
          id: 'new-trade-456',
          createdAt: newTradeCreatedTime,
        },
      ])

      mockPrisma.trade.findFirst.mockResolvedValue(null) // No recent cooldown

      // Simulate verification call
      // NOTE: Actual test implementation depends on your DriftStateVerifier structure

      expect(mockClosePosition).not.toHaveBeenCalled()
    })

    it('should NOT close when entry price differs by >2%', async () => {
      const exitTime = new Date(Date.now() - 20 * 60 * 1000) // 20 min ago (past grace period)

      mockPrisma.trade.findUnique.mockResolvedValue({
        id: 'trade-123',
        symbol: 'SOL-PERP',
        direction: 'long',
        entryTime: new Date(Date.now() - 30 * 60 * 1000),
        exitTime,
        exitReason: 'TP1',
        positionSizeUSD: 8000,
        entryPrice: 140.0, // DB says entry at $140
        configSnapshot: {},
      })

      mockDriftService.getPosition.mockResolvedValue({
        size: 57.14, // Size matches perfectly
        entryPrice: 143.5, // But entry price 2.5% higher = different position!
        unrealizedPnL: 120.5,
        side: 'long',
      })

      mockPrisma.trade.findMany.mockResolvedValue([]) // No newer trades
      mockPrisma.trade.findFirst.mockResolvedValue(null)

      // Should skip due to entry price mismatch
      expect(mockClosePosition).not.toHaveBeenCalled()
    })

    it('should NOT close when size differs by >15%', async () => {
      const exitTime = new Date(Date.now() - 20 * 60 * 1000)

      mockPrisma.trade.findUnique.mockResolvedValue({
        id: 'trade-123',
        symbol: 'SOL-PERP',
        direction: 'long',
        entryTime: new Date(Date.now() - 30 * 60 * 1000),
        exitTime,
        exitReason: 'TP1',
        positionSizeUSD: 8000,
        entryPrice: 140.0,
        configSnapshot: {},
      })

      mockDriftService.getPosition.mockResolvedValue({
        size: 45.0, // 45 tokens vs expected 57.14 = 79% ratio (below 85% threshold)
        entryPrice: 140.0,
        unrealizedPnL: -25.5,
        side: 'long',
      })

      mockPrisma.trade.findMany.mockResolvedValue([])
      mockPrisma.trade.findFirst.mockResolvedValue(null)

      expect(mockClosePosition).not.toHaveBeenCalled()
    })

    it('should NOT close when direction differs', async () => {
      const exitTime = new Date(Date.now() - 20 * 60 * 1000)

      mockPrisma.trade.findUnique.mockResolvedValue({
        id: 'trade-123',
        symbol: 'SOL-PERP',
        direction: 'long', // DB says LONG
        entryTime: new Date(Date.now() - 30 * 60 * 1000),
        exitTime,
        exitReason: 'SL',
        positionSizeUSD: 8000,
        entryPrice: 140.0,
        configSnapshot: {},
      })

      mockDriftService.getPosition.mockResolvedValue({
        size: -57.14, // Negative = SHORT position
        entryPrice: 140.0,
        unrealizedPnL: 80.0,
        side: 'short', // Drift shows SHORT
      })

      mockPrisma.trade.findMany.mockResolvedValue([])
      mockPrisma.trade.findFirst.mockResolvedValue(null)

      expect(mockClosePosition).not.toHaveBeenCalled()
    })

    it('should NOT close within 10-minute grace period', async () => {
      const exitTime = new Date(Date.now() - 5 * 60 * 1000) // Only 5 minutes ago

      mockPrisma.trade.findUnique.mockResolvedValue({
        id: 'trade-123',
        symbol: 'SOL-PERP',
        direction: 'long',
        entryTime: new Date(Date.now() - 15 * 60 * 1000),
        exitTime,
        exitReason: 'TP2',
        positionSizeUSD: 8000,
        entryPrice: 140.0,
        configSnapshot: {},
      })

      mockDriftService.getPosition.mockResolvedValue({
        size: 57.14,
        entryPrice: 140.0,
        unrealizedPnL: 45.2,
        side: 'long',
      })

      mockPrisma.trade.findMany.mockResolvedValue([])
      mockPrisma.trade.findFirst.mockResolvedValue(null)

      // Should skip due to grace period
      expect(mockClosePosition).not.toHaveBeenCalled()
    })
  })

  describe('CRITICAL: Verified Ghost Closure', () => {
    it('should close when all verification checks pass', async () => {
      const exitTime = new Date(Date.now() - 20 * 60 * 1000) // 20 min ago (past grace period)

      mockPrisma.trade.findUnique.mockResolvedValue({
        id: 'ghost-trade-789',
        symbol: 'SOL-PERP',
        direction: 'long',
        entryTime: new Date(Date.now() - 40 * 60 * 1000),
        exitTime,
        exitReason: 'SL',
        positionSizeUSD: 8000,
        entryPrice: 140.0,
        configSnapshot: {},
      })

      mockDriftService.getPosition.mockResolvedValue({
        size: 57.14, // Size matches within 15% tolerance
        entryPrice: 140.2, // Price matches within 2%
        unrealizedPnL: -120.5,
        side: 'long', // Direction matches
      })

      mockPrisma.trade.findMany.mockResolvedValue([]) // No newer trades
      mockPrisma.trade.findFirst.mockResolvedValue(null) // No cooldown

      mockClosePosition.mockResolvedValue({
        success: true,
        transactionSignature: '5YxABC123...',
        realizedPnL: -120.5,
      })

      mockPrisma.trade.update.mockResolvedValue({})

      // Simulate verification and close
      // NOTE: Actual test implementation depends on your DriftStateVerifier structure

      // Should have called closePosition with correct parameters
      expect(mockClosePosition).toHaveBeenCalledWith({
        symbol: 'SOL-PERP',
        percentToClose: 100,
        slippageTolerance: 0.05,
      })

      // Should have updated database with cleanup metadata
      expect(mockPrisma.trade.update).toHaveBeenCalledWith(
        expect.objectContaining({
          where: { id: 'ghost-trade-789' },
        })
      )
    })

    it('should enforce 5-minute cooldown between attempts', async () => {
      const exitTime = new Date(Date.now() - 20 * 60 * 1000)
      const lastAttempt = Date.now() - 2 * 60 * 1000 // Only 2 minutes ago

      mockPrisma.trade.findUnique.mockResolvedValue({
        id: 'trade-123',
        symbol: 'SOL-PERP',
        direction: 'long',
        entryTime: new Date(Date.now() - 30 * 60 * 1000),
        exitTime,
        exitReason: 'SL',
        positionSizeUSD: 8000,
        entryPrice: 140.0,
        configSnapshot: {},
      })

      mockDriftService.getPosition.mockResolvedValue({
        size: 57.14,
        entryPrice: 140.0,
        unrealizedPnL: -45.2,
        side: 'long',
      })

      mockPrisma.trade.findMany.mockResolvedValue([])

      // Database shows recent cleanup attempt
      mockPrisma.trade.findFirst.mockResolvedValue({
        configSnapshot: {
          orphanCleanupTime: new Date(lastAttempt).toISOString(),
        },
      })

      // Should skip due to cooldown
      expect(mockClosePosition).not.toHaveBeenCalled()
    })
  })

  describe('CRITICAL: Edge Case Handling', () => {
    it('should handle missing database trade gracefully', async () => {
      mockPrisma.trade.findUnique.mockResolvedValue(null)
      mockPrisma.trade.findFirst.mockResolvedValue(null)

      // Should not attempt close if DB record missing
      expect(mockClosePosition).not.toHaveBeenCalled()
    })

    it('should handle Drift position already closed', async () => {
      mockPrisma.trade.findUnique.mockResolvedValue({
        id: 'trade-123',
        symbol: 'SOL-PERP',
        direction: 'long',
        entryTime: new Date(Date.now() - 30 * 60 * 1000),
        exitTime: new Date(Date.now() - 20 * 60 * 1000),
        exitReason: 'TP1',
        positionSizeUSD: 8000,
        entryPrice: 140.0,
        configSnapshot: {},
      })

      mockPrisma.trade.findFirst.mockResolvedValue(null)

      // Position already closed on Drift
      mockDriftService.getPosition.mockResolvedValue(null)

      // Should not attempt close - already resolved
      expect(mockClosePosition).not.toHaveBeenCalled()
    })

    it('should handle unknown market index gracefully', async () => {
      mockPrisma.trade.findUnique.mockResolvedValue({
        id: 'trade-123',
        symbol: 'UNKNOWN-PERP', // Invalid symbol
        direction: 'long',
        entryTime: new Date(Date.now() - 30 * 60 * 1000),
        exitTime: new Date(Date.now() - 20 * 60 * 1000),
        exitReason: 'SL',
        positionSizeUSD: 8000,
        entryPrice: 140.0,
        configSnapshot: {},
      })

      mockPrisma.trade.findFirst.mockResolvedValue(null)

      // Should skip unknown markets
      expect(mockClosePosition).not.toHaveBeenCalled()
    })

    it('should log protection events to database', async () => {
      const exitTime = new Date(Date.now() - 20 * 60 * 1000)

      mockPrisma.trade.findUnique.mockResolvedValue({
        id: 'trade-123',
        symbol: 'SOL-PERP',
        direction: 'long',
        entryTime: new Date(Date.now() - 30 * 60 * 1000),
        exitTime,
        exitReason: 'TP1',
        positionSizeUSD: 8000,
        entryPrice: 140.0,
        configSnapshot: {},
      })

      mockDriftService.getPosition.mockResolvedValue({
        size: 57.14,
        entryPrice: 145.0, // 3.6% price difference = protection trigger
        unrealizedPnL: 180.0,
        side: 'long',
      })

      mockPrisma.trade.findMany.mockResolvedValue([])
      mockPrisma.trade.findFirst.mockResolvedValue(null)
      mockPrisma.trade.update.mockResolvedValue({})

      // Should have logged protection event
      expect(mockPrisma.trade.update).toHaveBeenCalledWith(
        expect.objectContaining({
          where: { id: 'trade-123' },
          data: expect.objectContaining({
            configSnapshot: expect.objectContaining({
              path: ['protectionEvents'],
            }),
          }),
        })
      )
    })
  })

  describe('CRITICAL: Fail-Open Bias', () => {
    it('should NOT close when verification is uncertain', async () => {
      // Multiple ambiguous signals
      const exitTime = new Date(Date.now() - 15 * 60 * 1000) // Near grace period boundary

      mockPrisma.trade.findUnique.mockResolvedValue({
        id: 'trade-123',
        symbol: 'SOL-PERP',
        direction: 'long',
        entryTime: new Date(Date.now() - 25 * 60 * 1000),
        exitTime,
        exitReason: 'SL',
        positionSizeUSD: 8000,
        entryPrice: 140.0,
        configSnapshot: {},
      })

      mockDriftService.getPosition.mockResolvedValue({
        size: 55.0, // Size 96% of expected (within tolerance but marginal)
        entryPrice: 142.5, // Price 1.8% different (within tolerance but marginal)
        unrealizedPnL: 80.0,
        side: 'long',
      })

      mockPrisma.trade.findMany.mockResolvedValue([]) // No newer trades (but uncertain)
      mockPrisma.trade.findFirst.mockResolvedValue(null)

      // When signals are ambiguous, should err on side of NOT closing
      // (Better to miss cleanup than close active trade)
      expect(mockClosePosition).not.toHaveBeenCalled()
    })
  })
})