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import { describe, it, expect } from 'vitest';
import {
  specToXml,
  getStructuredSpecPromptInstruction,
  getAppSpecFormatInstruction,
  APP_SPEC_XML_FORMAT,
  type SpecOutput,
} from '@/lib/app-spec-format.js';

describe('app-spec-format.ts', () => {
  describe('specToXml', () => {
    it('should convert minimal spec to XML', () => {
      const spec: SpecOutput = {
        project_name: 'Test Project',
        overview: 'A test project',
        technology_stack: ['TypeScript', 'Node.js'],
        core_capabilities: ['Testing', 'Development'],
        implemented_features: [{ name: 'Feature 1', description: 'First feature' }],
      };

      const xml = specToXml(spec);

      expect(xml).toContain('<?xml version="1.0" encoding="UTF-8"?>');
      expect(xml).toContain('<project_specification>');
      expect(xml).toContain('</project_specification>');
      expect(xml).toContain('<project_name>Test Project</project_name>');
      expect(xml).toContain('<technology>TypeScript</technology>');
      expect(xml).toContain('<capability>Testing</capability>');
    });

    it('should escape XML special characters', () => {
      const spec: SpecOutput = {
        project_name: 'Test & Project',
        overview: 'Description with <tags>',
        technology_stack: ['TypeScript'],
        core_capabilities: ['Cap'],
        implemented_features: [],
      };

      const xml = specToXml(spec);

      expect(xml).toContain('Test &amp; Project');
      expect(xml).toContain('&lt;tags&gt;');
    });

    it('should include file_locations when provided', () => {
      const spec: SpecOutput = {
        project_name: 'Test',
        overview: 'Test',
        technology_stack: ['TS'],
        core_capabilities: ['Cap'],
        implemented_features: [
          {
            name: 'Feature',
            description: 'Desc',
            file_locations: ['src/index.ts'],
          },
        ],
      };

      const xml = specToXml(spec);

      expect(xml).toContain('<file_locations>');
      expect(xml).toContain('<location>src/index.ts</location>');
    });

    it('should not include file_locations when empty', () => {
      const spec: SpecOutput = {
        project_name: 'Test',
        overview: 'Test',
        technology_stack: ['TS'],
        core_capabilities: ['Cap'],
        implemented_features: [{ name: 'Feature', description: 'Desc', file_locations: [] }],
      };

      const xml = specToXml(spec);

      expect(xml).not.toContain('<file_locations>');
    });

    it('should include additional_requirements when provided', () => {
      const spec: SpecOutput = {
        project_name: 'Test',
        overview: 'Test',
        technology_stack: ['TS'],
        core_capabilities: ['Cap'],
        implemented_features: [],
        additional_requirements: ['Node.js 18+'],
      };

      const xml = specToXml(spec);

      expect(xml).toContain('<additional_requirements>');
      expect(xml).toContain('<requirement>Node.js 18+</requirement>');
    });

    it('should include development_guidelines when provided', () => {
      const spec: SpecOutput = {
        project_name: 'Test',
        overview: 'Test',
        technology_stack: ['TS'],
        core_capabilities: ['Cap'],
        implemented_features: [],
        development_guidelines: ['Use ESLint'],
      };

      const xml = specToXml(spec);

      expect(xml).toContain('<development_guidelines>');
      expect(xml).toContain('<guideline>Use ESLint</guideline>');
    });

    it('should include implementation_roadmap when provided', () => {
      const spec: SpecOutput = {
        project_name: 'Test',
        overview: 'Test',
        technology_stack: ['TS'],
        core_capabilities: ['Cap'],
        implemented_features: [],
        implementation_roadmap: [{ phase: 'Phase 1', status: 'completed', description: 'Setup' }],
      };

      const xml = specToXml(spec);

      expect(xml).toContain('<implementation_roadmap>');
      expect(xml).toContain('<status>completed</status>');
    });

    it('should not include optional sections when empty', () => {
      const spec: SpecOutput = {
        project_name: 'Test',
        overview: 'Test',
        technology_stack: ['TS'],
        core_capabilities: ['Cap'],
        implemented_features: [],
        additional_requirements: [],
        development_guidelines: [],
        implementation_roadmap: [],
      };

      const xml = specToXml(spec);

      expect(xml).not.toContain('<additional_requirements>');
      expect(xml).not.toContain('<development_guidelines>');
      expect(xml).not.toContain('<implementation_roadmap>');
    });
  });

  describe('getStructuredSpecPromptInstruction', () => {
    it('should return non-empty prompt instruction', () => {
      const instruction = getStructuredSpecPromptInstruction();
      expect(instruction).toBeTruthy();
      expect(instruction.length).toBeGreaterThan(100);
    });

    it('should mention required fields', () => {
      const instruction = getStructuredSpecPromptInstruction();
      expect(instruction).toContain('project_name');
      expect(instruction).toContain('overview');
      expect(instruction).toContain('technology_stack');
    });
  });

  describe('getAppSpecFormatInstruction', () => {
    it('should return non-empty format instruction', () => {
      const instruction = getAppSpecFormatInstruction();
      expect(instruction).toBeTruthy();
      expect(instruction.length).toBeGreaterThan(100);
    });

    it('should include critical formatting requirements', () => {
      const instruction = getAppSpecFormatInstruction();
      expect(instruction).toContain('CRITICAL FORMATTING REQUIREMENTS');
    });
  });

  describe('APP_SPEC_XML_FORMAT', () => {
    it('should contain valid XML template structure', () => {
      expect(APP_SPEC_XML_FORMAT).toContain('<project_specification>');
      expect(APP_SPEC_XML_FORMAT).toContain('</project_specification>');
    });
  });
});