// NotesGenerator.swift
// Handles AI-powered note generation using OpenAI

import Foundation

/// Generates meeting notes using OpenAI API
class NotesGenerator {
    static let shared = NotesGenerator()
    
    private init() {}
    
    /// Generates meeting notes from transcript and user notes
    /// - Parameters:
    ///   - transcript: The meeting transcript
    ///   - userNotes: Additional notes from the user
    ///   - userBlurb: Information about the user for context
    ///   - systemPrompt: The system prompt for AI generation
    /// - Returns: Generated meeting notes
    func generateNotes(transcript: String,
                      userNotes: String,
                      userBlurb: String,
                      systemPrompt: String) async throws -> String {
        
        // TODO: Implement OpenAI API integration
        // For now, return a placeholder
        
        // Simulate API delay
        try await Task.sleep(nanoseconds: 2_000_000_000)
        
        // Placeholder response
        return """
        # Meeting Notes
        
        ## Summary
        This is a placeholder for AI-generated meeting notes.
        
        ## Key Points
        - Transcript length: \(transcript.count) characters
        - User notes provided: \(!userNotes.isEmpty)
        
        ## Action Items
        - Implement OpenAI API integration
        - Add proper prompt engineering
        
        ## Next Steps
        Once OpenAI API is integrated, this will provide comprehensive meeting notes based on the transcript and any additional context provided.
        """
    }
    
    /// Validates if OpenAI API key is configured
    /// - Returns: True if API key exists, false otherwise
    func isConfigured() -> Bool {
        guard let key = KeychainHelper.shared.get(forKey: "openAIKey"),
              !key.isEmpty else {
            return false
        }
        return true
    }
}