using System;

namespace XWorld.PublishTool
{
    // PublishTool.Cli 的参数：--mode client|server --src <dir> --out <dir> --spec <json> [--key <pem>]
    public sealed class CliOptions
    {
        public string Mode;      // "client" | "server"
        public string Src;       // 构建产物目录
        public string Out;       // 落位目录（版本目录本体）
        public string SpecPath;  // resolved-spec.json
        public string KeyPath;   // 私钥 pem，可空=不签名

        public const string Usage =
            "用法: PublishTool.Cli --mode client|server --src <dir> --out <dir> --spec <resolved-spec.json> [--key <private.pem>]";

        public static CliOptions Parse(string[] args)
        {
            var o = new CliOptions();
            for (int i = 0; i < args.Length; i += 2)
            {
                if (i + 1 >= args.Length) throw new ArgumentException($"缺少 {args[i]} 的值\n{Usage}");
                string v = args[i + 1];
                switch (args[i])
                {
                    case "--mode": o.Mode = v; break;
                    case "--src": o.Src = v; break;
                    case "--out": o.Out = v; break;
                    case "--spec": o.SpecPath = v; break;
                    case "--key": o.KeyPath = v; break;
                    default: throw new ArgumentException($"未知参数 {args[i]}\n{Usage}");
                }
            }
            if (o.Mode != "client" && o.Mode != "server")
                throw new ArgumentException($"--mode 必须是 client 或 server\n{Usage}");
            if (string.IsNullOrEmpty(o.Src) || string.IsNullOrEmpty(o.Out) || string.IsNullOrEmpty(o.SpecPath))
                throw new ArgumentException($"--src/--out/--spec 均必填\n{Usage}");
            return o;
        }
    }
}