import { describe, it, expect } from 'vitest'

/**
 * Registration Toggle Feature Tests
 *
 * Tests the logic for determining whether registration is enabled
 * This validates the registration_enabled configuration behavior
 */
describe('Registration Toggle Logic', () => {
  describe('registration_enabled configuration', () => {
    it('should default to true when registration_enabled is undefined', () => {
      const config = {}
      const registrationEnabled = (config as any).registration_enabled !== false

      expect(registrationEnabled).toBe(true)
    })

    it('should be true when registration_enabled is explicitly true', () => {
      const config = { registration_enabled: true }
      const registrationEnabled = config.registration_enabled !== false

      expect(registrationEnabled).toBe(true)
    })

    it('should be false when registration_enabled is explicitly false', () => {
      const config = { registration_enabled: false }
      const registrationEnabled = config.registration_enabled !== false

      expect(registrationEnabled).toBe(false)
    })

    it('should default to true when registration_enabled is null', () => {
      const config = { registration_enabled: null }
      const registrationEnabled = (config.registration_enabled as any) !== false

      expect(registrationEnabled).toBe(true)
    })

    it('should handle missing config gracefully', () => {
      const config = null
      const registrationEnabled = config?.registration_enabled !== false

      expect(registrationEnabled).toBe(true)
    })
  })

  describe('UI component visibility logic', () => {
    it('should show signup button when registration is enabled', () => {
      const registrationEnabled = true
      const shouldShowSignup = registrationEnabled

      expect(shouldShowSignup).toBe(true)
    })

    it('should hide signup button when registration is disabled', () => {
      const registrationEnabled = false
      const shouldShowSignup = registrationEnabled

      expect(shouldShowSignup).toBe(false)
    })
  })

  describe('conditional rendering patterns', () => {
    it('should render signup link with registrationEnabled && pattern', () => {
      const registrationEnabled = true
      const signupElement = registrationEnabled && 'SignUpButton'

      expect(signupElement).toBe('SignUpButton')
    })

    it('should not render signup link when disabled', () => {
      const registrationEnabled = false
      const signupElement = registrationEnabled && 'SignUpButton'

      expect(signupElement).toBe(false)
    })
  })

  describe('SystemConfig interface compliance', () => {
    interface SystemConfig {
      beta_mode: boolean
      registration_enabled?: boolean
    }

    it('should have optional registration_enabled field', () => {
      const config1: SystemConfig = {
        beta_mode: false,
      }

      const config2: SystemConfig = {
        beta_mode: false,
        registration_enabled: true,
      }

      expect(config1.beta_mode).toBe(false)
      expect(config2.registration_enabled).toBe(true)
    })

    it('should handle both beta_mode and registration_enabled', () => {
      const config: SystemConfig = {
        beta_mode: true,
        registration_enabled: false,
      }

      expect(config.beta_mode).toBe(true)
      expect(config.registration_enabled).toBe(false)
    })
  })

  describe('edge cases', () => {
    it('should treat empty string as truthy (not false)', () => {
      const config = { registration_enabled: '' as any }
      const registrationEnabled = config.registration_enabled !== false

      expect(registrationEnabled).toBe(true)
    })

    it('should treat 0 as truthy (not false)', () => {
      const config = { registration_enabled: 0 as any }
      const registrationEnabled = config.registration_enabled !== false

      expect(registrationEnabled).toBe(true)
    })

    it('should treat "false" string as truthy (not false)', () => {
      const config = { registration_enabled: 'false' as any }
      const registrationEnabled = config.registration_enabled !== false

      expect(registrationEnabled).toBe(true)
    })

    it('should only treat boolean false as disabled', () => {
      const testCases = [
        { value: false, expected: false },
        { value: true, expected: true },
        { value: null, expected: true },
        { value: undefined, expected: true },
        { value: 0, expected: true },
        { value: '', expected: true },
        { value: 'false', expected: true },
        { value: [], expected: true },
        { value: {}, expected: true },
      ]

      testCases.forEach(({ value, expected }) => {
        const config = { registration_enabled: value as any }
        const registrationEnabled = config.registration_enabled !== false
        expect(registrationEnabled).toBe(expected)
      })
    })
  })

  describe('backend API response handling', () => {
    it('should parse backend response with registration_enabled', () => {
      const apiResponse = {
        beta_mode: false,
        default_coins: ['BTCUSDT'],
        btc_eth_leverage: 5,
        altcoin_leverage: 5,
        registration_enabled: true,
      }

      expect(apiResponse.registration_enabled).toBe(true)
    })

    it('should handle backend response without registration_enabled', () => {
      const apiResponse = {
        beta_mode: false,
        default_coins: ['BTCUSDT'],
        btc_eth_leverage: 5,
        altcoin_leverage: 5,
      }

      const registrationEnabled =
        (apiResponse as any).registration_enabled !== false

      expect(registrationEnabled).toBe(true)
    })
  })

  describe('multi-location consistency', () => {
    const systemConfig = { registration_enabled: false }

    it('should have consistent behavior across LoginPage', () => {
      const registrationEnabled = systemConfig?.registration_enabled !== false
      expect(registrationEnabled).toBe(false)
    })

    it('should have consistent behavior across RegisterPage', () => {
      const registrationEnabled = systemConfig?.registration_enabled !== false
      expect(registrationEnabled).toBe(false)
    })

    it('should have consistent behavior across HeaderBar', () => {
      const registrationEnabled = systemConfig?.registration_enabled !== false
      expect(registrationEnabled).toBe(false)
    })

    it('should have consistent behavior across LoginModal', () => {
      const registrationEnabled = systemConfig?.registration_enabled !== false
      expect(registrationEnabled).toBe(false)
    })
  })
})
