using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO.Compression;

namespace SmartScanner
{
    public static class LBProjService
    {
        private const string ConfigFileName = "config.json";
        private const string ModelNameFileName = "model_name.txt";
        private const string ModelDir = "model";  // 固定模型目录

        /// <summary>
        /// 创建临时目录
        /// </summary>
        private static string CreateTempDirectory()
        {
            string tempDir = Path.Combine(Path.GetTempPath(), Path.GetRandomFileName());
            Directory.CreateDirectory(tempDir);
            return tempDir;
        }

        /// <summary>
        /// 获取所有可用模型
        /// </summary>
        public static string[] GetAvailableModels()
        {
            string modelPath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, ModelDir);

            if (!Directory.Exists(modelPath))
            {
                Directory.CreateDirectory(modelPath);
                return Array.Empty<string>();
            }

            return Directory.GetFiles(modelPath, "*.lb")
                           .Select(Path.GetFileName)
                           .ToArray();
        }

        /// <summary>
        /// 创建工程文件
        /// </summary>
        public static (bool Success, string Message) CreateLBProj(
            string paramFilePath,
            string modelFileName,
            string outputPath)
        {
            try
            {
                // 验证模型是否存在
                string fullModelPath = Path.Combine(ModelDir, modelFileName);
                if (!File.Exists(fullModelPath))
                {
                    return (false, $"模型文件 {modelFileName} 不存在于 {ModelDir} 目录");
                }

                // 创建临时目录并打包
                string tempDir = CreateTempDirectory();
                try
                {
                    // 1. 保存参数文件
                    File.Copy(paramFilePath, Path.Combine(tempDir, ConfigFileName), true);

                    // 2. 保存模型文件名（非路径）
                    File.WriteAllText(Path.Combine(tempDir, ModelNameFileName), modelFileName);

                    // 3. 创建ZIP包
                    ZipFile.CreateFromDirectory(tempDir, outputPath);
                    return (true, "工程文件创建成功");
                }
                finally
                {
                    Directory.Delete(tempDir, true);
                }
            }
            catch (Exception ex)
            {
                return (false, $"创建失败: {ex.Message}");
            }
        }

        /// <summary>
        /// 加载工程文件
        /// </summary>
        public static (string ModelName, string configPath, string ConfigContent, string Message) LoadLBProj(string projectFilePath)
        {
            try
            {
                string tempDir = CreateTempDirectory();
                try
                {
                    ZipFile.ExtractToDirectory(projectFilePath, tempDir);

                    // 1. 读取模型文件名
                    string modelNameFile = Path.Combine(tempDir, ModelNameFileName);
                    if (!File.Exists(modelNameFile))
                    {
                        return (null, null, null, "工程文件中缺少模型名称记录");
                    }
                    string modelName = File.ReadAllText(modelNameFile);

                    // 2. 验证模型是否存在
                    string fullModelPath = Path.Combine(ModelDir, modelName);
                    if (!File.Exists(fullModelPath))
                    {
                        return (null, null, null, $"模型 {modelName} 不存在于 {ModelDir} 目录");
                    }

                    // 3. 读取配置
                    string configPath = Path.Combine(tempDir, ConfigFileName);
                    string configContent = File.ReadAllText(configPath);

                    return (modelName, configPath, configContent, "加载成功");
                }
                finally
                {
                    Directory.Delete(tempDir, true);
                }
            }
            catch (Exception ex)
            {
                return (null, null, null, $"加载失败: 请输入正确的工程文件路径: {ex.Message}");
            }
        }
    }
}