/**
 * Contract test for Signer Strategies
 *
 * This test verifies that all signer strategy implementations
 * adhere to the unified ISignerStrategy contract.
 *
 * Tests MUST FAIL initially until implementation is provided.
 */

import { describe, test, expect, beforeEach } from '@jest/globals'

// Import types and implementations
import { Platform, SignatureType } from '@/types/credential'
import type { ISignerStrategy } from '@/types/credential'

describe('Signer Strategies Contract Tests', () => {
  let pacificaSigner: ISignerStrategy
  let asterSigner: ISignerStrategy
  let binanceSigner: ISignerStrategy

  beforeEach(async () => {
    // Import all signer implementations
    const { PacificaSigner } = await import('@/core/credential-manager/signers/PacificaSigner')
    const { AsterSigner } = await import('@/core/credential-manager/signers/AsterSigner')
    const { BinanceSigner } = await import('@/core/credential-manager/signers/BinanceSigner')

    pacificaSigner = new PacificaSigner()
    asterSigner = new AsterSigner()
    binanceSigner = new BinanceSigner()
  })

  describe('Platform Identification', () => {
    test('each signer should identify correct platform', () => {
      expect(pacificaSigner.platform).toBe(Platform.PACIFICA)
      expect(asterSigner.platform).toBe(Platform.ASTER)
      expect(binanceSigner.platform).toBe(Platform.BINANCE)
    })

    test('each signer should use correct signature algorithm', () => {
      expect(pacificaSigner.algorithm).toBe(SignatureType.ED25519)
      expect(asterSigner.algorithm).toBe(SignatureType.EIP191)
      expect(binanceSigner.algorithm).toBe(SignatureType.HMAC_SHA256)
    })
  })

  describe('Unified Interface Compliance', () => {
    const signers = [
      { name: 'PacificaSigner', instance: null as any },
      { name: 'AsterSigner', instance: null as any },
      { name: 'BinanceSigner', instance: null as any }
    ]

    beforeEach(() => {
      signers[0].instance = pacificaSigner
      signers[1].instance = asterSigner
      signers[2].instance = binanceSigner
    })

    test('all signers should implement required methods', () => {
      signers.forEach(({ name, instance }) => {
        expect(typeof instance.sign).toBe('function')
        expect(typeof instance.verify).toBe('function')
        expect(instance.platform).toBeDefined()
        expect(instance.algorithm).toBeDefined()
      })
    })

    test('all signers should have platform property', () => {
      signers.forEach(({ name, instance }) => {
        expect(instance.platform).toBeDefined()
        expect(typeof instance.platform).toBe('string')
        expect(Object.values(Platform)).toContain(instance.platform)
      })
    })

    test('all signers should have algorithm property', () => {
      signers.forEach(({ name, instance }) => {
        expect(instance.algorithm).toBeDefined()
        expect(typeof instance.algorithm).toBe('string')
        expect(Object.values(SignatureType)).toContain(instance.algorithm)
      })
    })
  })

  describe('Signing Performance Requirements', () => {
    test('Pacifica signer should meet performance requirements', async () => {
      const credentials = {
        type: 'ed25519' as const,
        privateKey: 'f26670e2ca334117f8859f9f32e50251641953a30b54f6ffcf82db836cfdfea5'
      }
      const message = new TextEncoder().encode('Performance test')

      const startTime = Date.now()
      await pacificaSigner.sign(message, credentials)
      const duration = Date.now() - startTime

      // Performance requirement: < 50ms
      expect(duration).toBeLessThan(50)
    })

    test('Aster signer should meet performance requirements', async () => {
      const credentials = {
        type: 'eip191' as const,
        privateKey: '0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef'
      }
      const message = new TextEncoder().encode('Performance test')

      const startTime = Date.now()

      try {
        await asterSigner.sign(message, credentials)
        const duration = Date.now() - startTime
        expect(duration).toBeLessThan(50)
      } catch (error) {
        // If not implemented yet, test should still pass structure
        expect(error).toBeInstanceOf(Error)
      }
    })

    test('Binance signer should meet performance requirements', async () => {
      const credentials = {
        type: 'hmac-sha256' as const,
        apiKey: 'test_api_key',
        secretKey: 'test_secret_key'
      }
      const message = new TextEncoder().encode('Performance test')

      const startTime = Date.now()

      try {
        await binanceSigner.sign(message, credentials)
        const duration = Date.now() - startTime
        expect(duration).toBeLessThan(50)
      } catch (error) {
        // If not implemented yet, test should still pass structure
        expect(error).toBeInstanceOf(Error)
      }
    })
  })

  describe('Error Handling Consistency', () => {
    test('all signers should handle invalid credentials consistently', async () => {
      const invalidCredentials = {
        type: 'invalid' as any,
        privateKey: null as any
      }
      const message = new TextEncoder().encode('Test message')

      // All signers should throw errors for invalid credentials
      await expect(pacificaSigner.sign(message, invalidCredentials)).rejects.toThrow()
      await expect(asterSigner.sign(message, invalidCredentials)).rejects.toThrow()
      await expect(binanceSigner.sign(message, invalidCredentials)).rejects.toThrow()
    })

    test('all signers should handle empty messages consistently', async () => {
      const emptyMessage = new Uint8Array(0)

      // Should either all succeed or all fail consistently
      const validCredentials = [
        {
          type: 'ed25519' as const,
          privateKey: 'f26670e2ca334117f8859f9f32e50251641953a30b54f6ffcf82db836cfdfea5'
        },
        {
          type: 'eip191' as const,
          privateKey: '0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef'
        },
        {
          type: 'hmac-sha256' as const,
          apiKey: 'test_key',
          secretKey: 'test_secret'
        }
      ]

      const signerInstances = [pacificaSigner, asterSigner, binanceSigner]

      for (let i = 0; i < signerInstances.length; i++) {
        try {
          const signature = await signerInstances[i].sign(emptyMessage, validCredentials[i])
          expect(typeof signature).toBe('string')
        } catch (error) {
          expect(error).toBeInstanceOf(Error)
        }
      }
    })
  })

  describe('Cross-Platform Signing Compatibility', () => {
    test('different platforms should produce different signatures for same message', async () => {
      const message = new TextEncoder().encode('Cross-platform test message')

      const pacificaCredentials = {
        type: 'ed25519' as const,
        privateKey: 'f26670e2ca334117f8859f9f32e50251641953a30b54f6ffcf82db836cfdfea5'
      }

      try {
        const pacificaSignature = await pacificaSigner.sign(message, pacificaCredentials)
        expect(typeof pacificaSignature).toBe('string')
        expect(pacificaSignature.length).toBeGreaterThan(0)

        // Signatures from different platforms with different algorithms should be different
        // (This is expected behavior for multi-platform hedging)

      } catch (error) {
        // Test structure is valid even if implementation isn't complete
        expect(error).toBeInstanceOf(Error)
      }
    })
  })

  describe('Strategy Factory Pattern Compatibility', () => {
    test('all signers should be creatable via factory pattern', () => {
      // Verify that signers can be instantiated dynamically
      const signerMap = {
        [Platform.PACIFICA]: pacificaSigner,
        [Platform.ASTER]: asterSigner,
        [Platform.BINANCE]: binanceSigner
      }

      Object.entries(signerMap).forEach(([platform, signer]) => {
        expect(signer).toBeDefined()
        expect(signer.platform).toBe(platform)
        expect(typeof signer.sign).toBe('function')
        expect(typeof signer.verify).toBe('function')
      })
    })

    test('signers should support dynamic strategy selection', () => {
      const platforms = [Platform.PACIFICA, Platform.ASTER, Platform.BINANCE]
      const signerInstances = [pacificaSigner, asterSigner, binanceSigner]

      platforms.forEach((platform, index) => {
        const signer = signerInstances[index]
        expect(signer.platform).toBe(platform)

        // Should be usable in a strategy pattern
        expect(typeof signer.sign).toBe('function')
        expect(typeof signer.verify).toBe('function')
      })
    })
  })
})