package com.guinetik.examples;
   
   import com.guinetik.rr.RocketRest;
   import com.guinetik.rr.RocketRestConfig;
   import com.guinetik.rr.RocketRestOptions;
   import com.guinetik.rr.result.ApiError;
   import com.guinetik.rr.result.Result;
   
   import java.time.LocalDate;
  import java.time.format.DateTimeFormatter;
  import java.util.HashMap;
  import java.util.Map;
  import java.util.Scanner;
  
  /**
   * Example demonstrating how to fetch NASA's Astronomy Picture of the Day (APOD)
   * using RocketRest's fluent API.
   * API documentation: https://api.nasa.gov/
   */
  public class NasaApodExample implements Example {
      
      private static final String NASA_API_BASE_URL = "https://api.nasa.gov";
      private static final String DEFAULT_API_KEY = "DEMO_KEY";
      
      @Override
      public String getName() {
          return "NASA Astronomy Picture of the Day (APOD) API";
      }
      
      @Override
      public void run() {
          System.out.println("====================================");
          System.out.println("NASA Astronomy Picture of the Day API");
          System.out.println("====================================");
          System.out.println("This example fetches the NASA APOD using RocketRest's fluent API.");
          System.out.println("The DEMO_KEY has strict usage limits. Get your free API key at: https://api.nasa.gov/");
          
          // Prompt for API key
          String apiKey = promptForApiKey();
          
          // Create RocketRest client for NASA API
          RocketRestConfig config = RocketRestConfig.builder(NASA_API_BASE_URL)
                  .defaultOptions(options -> {
                      // Set logging options
                      options.set(RocketRestOptions.LOGGING_ENABLED, true);
                      options.set(RocketRestOptions.LOG_RESPONSE_BODY, true);
                  })
                  .build();
          
          RocketRest client = new RocketRest(NASA_API_BASE_URL, config);
          
          try {
              // Optional: Get specific date or use today
              LocalDate date = promptForDate();
              
              // Build query parameters
              Map<String, String> queryParams = new HashMap<>();
              queryParams.put("api_key", apiKey);
              
              // Add date parameter if user selected a specific date
              if (date != null) {
                  String formattedDate = date.format(DateTimeFormatter.ISO_DATE);
                  queryParams.put("date", formattedDate);
                  System.out.println("\nFetching APOD for date: " + formattedDate);
              } else {
                  System.out.println("\nFetching today's APOD");
              }
              
              // Display raw response data from API for debugging
              System.out.println("\nMaking request to: " + NASA_API_BASE_URL + "/planetary/apod with params: " + queryParams);
              
              // Using the fluent API to handle success/error cases elegantly
              Result<ApodResponse, ApiError> result = client.fluent()
                      .get("/planetary/apod", ApodResponse.class, queryParams);
              
              // Process the result
              result.ifSuccess(this::displayApodInfo)
                    .ifFailure(this::handleApiError);
                    
          } catch (Exception e) {
              System.out.println("❌ Error: " + e.getMessage());
              e.printStackTrace();
          } finally {
              client.shutdown();
          }
      }
      
      /**
       * Prompts the user to enter their NASA API key or use the default DEMO_KEY
       */
      private String promptForApiKey() {
          Scanner scanner = new Scanner(System.in);
          System.out.print("\nEnter your NASA API key (or press Enter to use DEMO_KEY): ");
          String key = scanner.nextLine().trim();
          
          // Use default if empty
          if (key.isEmpty()) {
              System.out.println("Using default DEMO_KEY");
              return DEFAULT_API_KEY;
         }
         
         return key;
     }
     
     /**
      * Prompts the user to enter a specific date or use today's date
      */
     private LocalDate promptForDate() {
         Scanner scanner = new Scanner(System.in);
         System.out.print("\nEnter a date (YYYY-MM-DD) or press Enter for today's picture: ");
         String dateStr = scanner.nextLine().trim();
         
         // Return null if empty (will use today's date)
         if (dateStr.isEmpty()) {
             return null;
         }
         
         try {
             return LocalDate.parse(dateStr);
         } catch (Exception e) {
             System.out.println("Invalid date format. Using today's date instead.");
             return null;
         }
     }
     
     /**
      * Displays information about the Astronomy Picture of the Day
      */
     private void displayApodInfo(ApodResponse apod) {
         System.out.println("\n==== Astronomy Picture of the Day ====");
         System.out.println("Date: " + apod.getDate());
         System.out.println("Title: " + apod.getTitle());
         
         // Add null checks to avoid NullPointerException
         String mediaType = apod.getMediaType();
         System.out.println("Media Type: " + (mediaType != null ? mediaType : "unknown"));
         
         // Safe handling of media type
         if (mediaType != null) {
             if ("image".equals(mediaType)) {
                 System.out.println("\nImage URL: " + apod.getUrl());
                 if (apod.getHdurl() != null) {
                     System.out.println("HD Image URL: " + apod.getHdurl());
                 }
             } else if ("video".equals(mediaType)) {
                 System.out.println("\nVideo URL: " + apod.getUrl());
             } else {
                 // Unknown media type, show URL anyway
                 System.out.println("\nURL: " + apod.getUrl());
             }
         } else {
             // If media_type is missing, show URL anyway
             if (apod.getUrl() != null) {
                 System.out.println("\nURL: " + apod.getUrl());
             }
         }
         
         if (apod.getExplanation() != null) {
             System.out.println("\nExplanation:");
             System.out.println(apod.getExplanation());
         }
         
         if (apod.getCopyright() != null && !apod.getCopyright().isEmpty()) {
             System.out.println("\nCopyright: " + apod.getCopyright());
         }
         
         // Debug - print all fields to help diagnose serialization issues
         System.out.println("\n--- Debug Info ---");
         System.out.println("Raw media_type value: " + apod.media_type);
         System.out.println("Raw url value: " + apod.url);
         System.out.println("Raw hdurl value: " + apod.hdurl);
     }
     
     /**
      * Handles API errors
      */
     private void handleApiError(ApiError error) {
         System.out.println("\n❌ API Error:");
         System.out.println("Status: " + error.getStatusCode());
         System.out.println("Message: " + error.getMessage());
         
         if (error.getStatusCode() == 403) {
             System.out.println("\nTip: You might be exceeding the rate limits of DEMO_KEY.");
             System.out.println("Get your free API key at: https://api.nasa.gov/");
         } else if (error.getStatusCode() == 429) {
             System.out.println("\nTip: You've hit the rate limit. Please try again later.");
         }
     }
     
     /**
      * POJO class representing the NASA APOD API response
      */
     public static class ApodResponse {
         // Use public fields for direct access in a debug section
         public String date;
         public String explanation;
         public String hdurl;
         public String media_type;
         public String service_version;
         public String title;
         public String url;
         public String copyright;
         
         // Required empty constructor for deserialization
         public ApodResponse() {
         }
         
         // Getters and setters
         public String getDate() {
             return date;
         }
         
         public void setDate(String date) {
             this.date = date;
         }
         
         public String getExplanation() {
             return explanation;
         }
         
         public void setExplanation(String explanation) {
             this.explanation = explanation;
         }
         
         public String getHdurl() {
             return hdurl;
         }
         
         public void setHdurl(String hdurl) {
             this.hdurl = hdurl;
         }
         
         public String getMediaType() {
             return media_type;  // This getter needs to return media_type field
         }
         
         public void setMediaType(String mediaType) {
             this.media_type = mediaType;
         }
         
         public String getServiceVersion() {
             return service_version;
         }
         
         public void setServiceVersion(String serviceVersion) {
             this.service_version = serviceVersion;
         }
         
         public String getTitle() {
             return title;
         }
         
         public void setTitle(String title) {
             this.title = title;
         }
         
         public String getUrl() {
             return url;
         }
         
         public void setUrl(String url) {
             this.url = url;
         }
         
         public String getCopyright() {
             return copyright;
         }
         
         public void setCopyright(String copyright) {
             this.copyright = copyright;
         }
         
         @Override
         public String toString() {
             return "ApodResponse{" +
                     "date='" + date + '\'' +
                     ", title='" + title + '\'' +
                     ", media_type='" + media_type + '\'' +
                     ", url='" + url + '\'' +
                     '}';
         }
     }
 }