using System.Configuration;

namespace XP.Common.Dump.Configs
{
    /// <summary>
    /// Dump 配置加载器，从 App.config 读取 Dump 相关配置项 | Dump configuration loader, reads dump-related configuration from App.config
    /// </summary>
    public static class ConfigLoader
    {
        /// <summary>
        /// 配置键前缀 | Configuration key prefix
        /// </summary>
        private const string KeyPrefix = "Dump:";

        /// <summary>
        /// 从 App.config 加载 Dump 配置 | Load Dump configuration from App.config
        /// </summary>
        /// <returns>Dump 配置实体，缺失或无效配置项使用默认值 | Dump configuration entity, uses default values for missing or invalid items</returns>
        public static DumpConfig LoadDumpConfig()
        {
            var config = new DumpConfig();

            // 加载存储路径 | Load storage path
            var storagePath = ConfigurationManager.AppSettings[KeyPrefix + "StoragePath"];
            if (!string.IsNullOrEmpty(storagePath)) config.StoragePath = storagePath;

            // 加载是否启用定时触发 | Load enable scheduled dump
            var enableScheduled = ConfigurationManager.AppSettings[KeyPrefix + "EnableScheduledDump"];
            if (bool.TryParse(enableScheduled, out var enabled)) config.EnableScheduledDump = enabled;

            // 加载定时触发间隔 | Load scheduled interval
            var interval = ConfigurationManager.AppSettings[KeyPrefix + "ScheduledIntervalMinutes"];
            if (int.TryParse(interval, out var min) && min > 0) config.ScheduledIntervalMinutes = min;

            // 加载 Mini Dump 文件大小上限 | Load Mini Dump size limit
            var sizeLimit = ConfigurationManager.AppSettings[KeyPrefix + "MiniDumpSizeLimitMB"];
            if (long.TryParse(sizeLimit, out var size) && size > 0) config.MiniDumpSizeLimitMB = size;

            // 加载文件保留天数 | Load retention days
            var retentionDays = ConfigurationManager.AppSettings[KeyPrefix + "RetentionDays"];
            if (int.TryParse(retentionDays, out var days) && days > 0) config.RetentionDays = days;

            return config;
        }
    }
}