// app/lib/ai-assistant/aiAssistantService.server.ts
import type { AISuggestionParams, AISuggestionResponse } from './types';
// Placeholder for actual LLM call utilities, to be imported later
// import { getLlmCompletion } from '~/lib/.server/llm';

export async function getAISuggestions(
  params: AISuggestionParams
): Promise<AISuggestionResponse> {
  console.log('AI Assistant Service called with params:', params);

  // TODO: Select LLM provider and model
  // TODO: Construct prompt based on params.task
  // TODO: Call LLM API
  // TODO: Process LLM response

  // Placeholder response for now
  if (params.task === 'complete') {
    // Simulate a simple completion
    if (params.code.endsWith('.')) {
      return {
        success: true,
        suggestions: [
          {
            id: 'compl-1',
            type: 'completion',
            code: 'log("hello world");',
            description: 'console.log example',
          },
          {
            id: 'compl-2',
            type: 'completion',
            code: 'dir(document);',
            description: 'console.dir example',
          }
        ],
      };
    }
  } else if (params.task === 'suggest_refactor') {
    return {
      success: true,
      suggestions: [
        {
          id: 'refactor-1',
          type: 'refactor',
          title: 'Use const instead of let',
          description: 'If the variable is not reassigned, use const.',
          code: 'const myVar = 10;', // Example suggested code
          from: 0, // Example range
          to: 10,  // Example range
        }
      ]
    }
  } else if (params.task === 'fix_bug') {
    // Simulate a bug fix suggestion
    if (params.code.includes('myVar = 10;')) { // Example condition
        return {
            success: true,
            suggestions: [
                {
                    id: 'fix-1',
                    type: 'fix',
                    title: 'Potential null access',
                    description: 'Variable `myVar` might be null here, causing a runtime error. Consider adding a check.',
                    code: 'if (myVar != null) {\n  console.log(myVar);\n} else {\n console.log("myVar is null");\n}', // Example fixed code
                    from: params.code.indexOf('myVar = 10;'), // Placeholder, ideally AI gives specific range
                    to: params.code.indexOf('myVar = 10;') + 'myVar = 10;'.length, // Placeholder
                }
            ]
        };
    }
    return { // Default if no specific mock bug found
        success: true,
        suggestions: [{
            id: 'fix-generic',
            type: 'fix',
            title: 'Generic Fix Example',
            description: 'This is a generic bug fix suggestion.',
            code: '// Fixed code example\n' + params.code.replace(/let/g, 'const'), // Simple replacement example
            from: 0,
            to: params.code.length,
        }]
    };
  }

  return {
    success: false,
    error: 'Task type not yet implemented or no suggestion found.',
  };
}