import { describe, it, expect } from 'vitest';
import { ResetPasswordViewDataBuilder } from './ResetPasswordViewDataBuilder';
import type { ResetPasswordPageDTO } from '@/lib/services/auth/types/ResetPasswordPageDTO';

describe('ResetPasswordViewDataBuilder', () => {
  describe('happy paths', () => {
    it('should transform ResetPasswordPageDTO to ResetPasswordViewData correctly', () => {
      const resetPasswordPageDTO: ResetPasswordPageDTO = {
        token: 'abc123def456',
        returnTo: '/login',
      };

      const result = ResetPasswordViewDataBuilder.build(resetPasswordPageDTO);

      expect(result).toEqual({
        token: 'abc123def456',
        returnTo: '/login',
        showSuccess: false,
        formState: {
          fields: {
            newPassword: { value: '', error: undefined, touched: false, validating: false },
            confirmPassword: { value: '', error: undefined, touched: false, validating: false },
          },
          isValid: true,
          isSubmitting: false,
          submitError: undefined,
          submitCount: 0,
        },
        isSubmitting: false,
        submitError: undefined,
      });
    });

    it('should handle empty returnTo path', () => {
      const resetPasswordPageDTO: ResetPasswordPageDTO = {
        token: 'abc123def456',
        returnTo: '',
      };

      const result = ResetPasswordViewDataBuilder.build(resetPasswordPageDTO);

      expect(result.returnTo).toBe('');
    });

    it('should handle returnTo with query parameters', () => {
      const resetPasswordPageDTO: ResetPasswordPageDTO = {
        token: 'abc123def456',
        returnTo: '/login?success=true',
      };

      const result = ResetPasswordViewDataBuilder.build(resetPasswordPageDTO);

      expect(result.returnTo).toBe('/login?success=true');
    });
  });

  describe('data transformation', () => {
    it('should preserve all DTO fields in the output', () => {
      const resetPasswordPageDTO: ResetPasswordPageDTO = {
        token: 'abc123def456',
        returnTo: '/login',
      };

      const result = ResetPasswordViewDataBuilder.build(resetPasswordPageDTO);

      expect(result.token).toBe(resetPasswordPageDTO.token);
      expect(result.returnTo).toBe(resetPasswordPageDTO.returnTo);
    });

    it('should not modify the input DTO', () => {
      const resetPasswordPageDTO: ResetPasswordPageDTO = {
        token: 'abc123def456',
        returnTo: '/login',
      };

      const originalDTO = { ...resetPasswordPageDTO };
      ResetPasswordViewDataBuilder.build(resetPasswordPageDTO);

      expect(resetPasswordPageDTO).toEqual(originalDTO);
    });

    it('should initialize form fields with default values', () => {
      const resetPasswordPageDTO: ResetPasswordPageDTO = {
        token: 'abc123def456',
        returnTo: '/login',
      };

      const result = ResetPasswordViewDataBuilder.build(resetPasswordPageDTO);

      expect(result.formState.fields.newPassword.value).toBe('');
      expect(result.formState.fields.newPassword.error).toBeUndefined();
      expect(result.formState.fields.newPassword.touched).toBe(false);
      expect(result.formState.fields.newPassword.validating).toBe(false);

      expect(result.formState.fields.confirmPassword.value).toBe('');
      expect(result.formState.fields.confirmPassword.error).toBeUndefined();
      expect(result.formState.fields.confirmPassword.touched).toBe(false);
      expect(result.formState.fields.confirmPassword.validating).toBe(false);
    });

    it('should initialize form state with default values', () => {
      const resetPasswordPageDTO: ResetPasswordPageDTO = {
        token: 'abc123def456',
        returnTo: '/login',
      };

      const result = ResetPasswordViewDataBuilder.build(resetPasswordPageDTO);

      expect(result.formState.isValid).toBe(true);
      expect(result.formState.isSubmitting).toBe(false);
      expect(result.formState.submitError).toBeUndefined();
      expect(result.formState.submitCount).toBe(0);
    });

    it('should initialize UI state flags correctly', () => {
      const resetPasswordPageDTO: ResetPasswordPageDTO = {
        token: 'abc123def456',
        returnTo: '/login',
      };

      const result = ResetPasswordViewDataBuilder.build(resetPasswordPageDTO);

      expect(result.showSuccess).toBe(false);
      expect(result.isSubmitting).toBe(false);
      expect(result.submitError).toBeUndefined();
    });
  });

  describe('edge cases', () => {
    it('should handle token with special characters', () => {
      const resetPasswordPageDTO: ResetPasswordPageDTO = {
        token: 'abc-123_def.456',
        returnTo: '/login',
      };

      const result = ResetPasswordViewDataBuilder.build(resetPasswordPageDTO);

      expect(result.token).toBe('abc-123_def.456');
    });

    it('should handle token with URL-encoded characters', () => {
      const resetPasswordPageDTO: ResetPasswordPageDTO = {
        token: 'abc%20123%40def',
        returnTo: '/login',
      };

      const result = ResetPasswordViewDataBuilder.build(resetPasswordPageDTO);

      expect(result.token).toBe('abc%20123%40def');
    });

    it('should handle returnTo with encoded characters', () => {
      const resetPasswordPageDTO: ResetPasswordPageDTO = {
        token: 'abc123def456',
        returnTo: '/login?redirect=%2Fdashboard',
      };

      const result = ResetPasswordViewDataBuilder.build(resetPasswordPageDTO);

      expect(result.returnTo).toBe('/login?redirect=%2Fdashboard');
    });

    it('should handle returnTo with hash fragment', () => {
      const resetPasswordPageDTO: ResetPasswordPageDTO = {
        token: 'abc123def456',
        returnTo: '/login#section',
      };

      const result = ResetPasswordViewDataBuilder.build(resetPasswordPageDTO);

      expect(result.returnTo).toBe('/login#section');
    });
  });

  describe('form state structure', () => {
    it('should have all required form fields', () => {
      const resetPasswordPageDTO: ResetPasswordPageDTO = {
        token: 'abc123def456',
        returnTo: '/login',
      };

      const result = ResetPasswordViewDataBuilder.build(resetPasswordPageDTO);

      expect(result.formState.fields).toHaveProperty('newPassword');
      expect(result.formState.fields).toHaveProperty('confirmPassword');
    });

    it('should have consistent field state structure', () => {
      const resetPasswordPageDTO: ResetPasswordPageDTO = {
        token: 'abc123def456',
        returnTo: '/login',
      };

      const result = ResetPasswordViewDataBuilder.build(resetPasswordPageDTO);

      const fields = result.formState.fields;
      Object.values(fields).forEach((field) => {
        expect(field).toHaveProperty('value');
        expect(field).toHaveProperty('error');
        expect(field).toHaveProperty('touched');
        expect(field).toHaveProperty('validating');
      });
    });
  });
});