using System;
using System.IO;
using System.Text.Json;
using GeViSetEditor.Core.Parsers;

namespace GeViSetEditor.CLI.Commands
{
    /// <summary>
    /// Analyze binary structure to understand configuration format
    /// </summary>
    public static class AnalyzeStructureCommand
    {
        public static void Execute(string inputPath, string? outputReportPath = null)
        {
            if (!File.Exists(inputPath))
            {
                Console.WriteLine($"ERROR: File not found: {inputPath}");
                return;
            }

            try
            {
                // Read file
                byte[] data = File.ReadAllBytes(inputPath);
                Console.WriteLine($"Analyzing: {inputPath}");
                Console.WriteLine($"File size: {data.Length:N0} bytes");

                // Run analysis
                var analyzer = new AdvancedBinaryAnalyzer();
                var report = analyzer.Analyze(data);

                // Show summary
                Console.WriteLine("\n=== Analysis Summary ===");
                Console.WriteLine($"Header: '{report.Header}'");
                Console.WriteLine($"Header ends at: {report.HeaderEndOffset} (0x{report.HeaderEndOffset:X})");
                Console.WriteLine($"Sections identified: {report.Sections.Count}");

                Console.WriteLine("\n=== Markers Found ===");
                foreach (var marker in report.Markers)
                {
                    Console.WriteLine($"{marker.Key}: {marker.Value.Count} occurrences");
                }

                Console.WriteLine("\n=== Data Type Counts ===");
                foreach (var type in report.DataTypeCounts)
                {
                    Console.WriteLine($"{type.Key}: {type.Value}");
                }

                // Export detailed report if requested
                if (!string.IsNullOrEmpty(outputReportPath))
                {
                    var options = new JsonSerializerOptions
                    {
                        WriteIndented = true,
                        PropertyNamingPolicy = JsonNamingPolicy.CamelCase
                    };

                    string json = JsonSerializer.Serialize(report, options);
                    File.WriteAllText(outputReportPath, json);
                    Console.WriteLine($"\nDetailed report saved to: {outputReportPath}");
                }

                Console.WriteLine("\n✓ Analysis complete!");

            }
            catch (Exception ex)
            {
                Console.WriteLine($"\n✗ ERROR: {ex.Message}");
                Console.WriteLine($"Stack trace:\n{ex.StackTrace}");
            }
        }
    }
}