using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Http;
using System.Text.Json;
using RainOpsMini.Services;
using RainOpsMini.Plugins;
using RainOpsMini.Models;
using RainOpsMini;

namespace RainOpsMini.Apis
{
    public static class SystemApi
    {
        public static void MapSystemApis(this IEndpointRouteBuilder app)
        {
            // API: 获取在线管理端/OB 状态
            // 用于管理面板查看当前有哪些管理员或 OB 在线
            app.MapGet("/api/online-status", (OnlineUserService service, HttpContext ctx) =>
            {
                // 需要认证后才能查看
                if (ctx.User.Identity?.IsAuthenticated != true) return Results.Unauthorized();

                return Results.Ok(new
                {
                    panelUsers = service.GetOnlinePanelUsers(),
                    cameramen = service.GetOnlineCameramen()
                });
            });

            // API: 获取插件列表
            // 返回所有已加载的插件及其状态
            app.MapGet("/api/plugins", (PluginManager pm, HttpContext ctx) =>
            {
                if (ctx.User.Identity?.IsAuthenticated != true) return Results.Unauthorized();
                return Results.Ok(pm.GetPlugins());
            });

            // API: 更新插件配置
            // 动态修改插件的运行参数
            app.MapPost("/api/plugins/{name}/config", (string name, JsonElement config, PluginManager pm, HttpContext ctx) =>
            {
                if (ctx.User.Identity?.IsAuthenticated != true) return Results.Unauthorized();
                // 建议增加更严格的权限检查，例如 IsSuperAdmin
                pm.UpdateConfig(name, config);
                return Results.Ok();
            });

            // API: 重置插件配置
            // 将插件配置恢复为默认值
            app.MapPost("/api/plugins/{name}/reset", (string name, PluginManager pm, HttpContext ctx) =>
            {
                if (ctx.User.Identity?.IsAuthenticated != true) return Results.Unauthorized();
                pm.ResetConfig(name);
                return Results.Ok();
            });

            // API: 自动检测服务器配置
            // 尝试从 Squad 服务器配置文件中读取 RCON 信息
            app.MapGet("/api/setup/detect-config", async () =>
            {
                if (Program.isConfigured) return Results.BadRequest(new { error = "系统已初始化，禁止重复配置" });

                string cfgPath = Path.Combine(Directory.GetCurrentDirectory(), "SquadGame", "ServerConfig", "Rcon.cfg");
                if (!File.Exists(cfgPath))
                {
                    // 尝试全大写文件名（虽然 Windows 不区分大小写，但为了兼容性）
                    cfgPath = Path.Combine(Directory.GetCurrentDirectory(), "SquadGame", "ServerConfig", "RCON.cfg");
                    if (!File.Exists(cfgPath)) return Results.NotFound(new { error = "Config file not found" });
                }

                try
                {
                    string[] lines = await File.ReadAllLinesAsync(cfgPath);
                    string? ip = null;
                    int? port = null;
                    string? password = null;
                    bool modified = false;

                    for (int i = 0; i < lines.Length; i++)
                    {
                        string line = lines[i].Trim();
                        if (string.IsNullOrWhiteSpace(line) || line.StartsWith("//") || line.StartsWith("#")) continue;

                        // 简单的键值对解析
                        int eqIndex = line.IndexOf('=');
                        if (eqIndex == -1) continue;

                        string key = line.Substring(0, eqIndex).Trim();
                        string value = line.Substring(eqIndex + 1).Trim();

                        if (key.Equals("IP", StringComparison.OrdinalIgnoreCase)) ip = value;
                        else if (key.Equals("Port", StringComparison.OrdinalIgnoreCase))
                        {
                            if (int.TryParse(value, out int p)) port = p;
                        }
                        else if (key.Equals("Password", StringComparison.OrdinalIgnoreCase)) password = value;
                        else if (key.Equals("MaxConnections", StringComparison.OrdinalIgnoreCase))
                        {
                            if (int.TryParse(value, out int maxCon) && maxCon < 100)
                            {
                                // 强制更新最大连接数为 100
                                lines[i] = "MaxConnections=100";
                                modified = true;
                            }
                        }
                    }

                    if (modified)
                    {
                        await File.WriteAllLinesAsync(cfgPath, lines);
                    }

                    if (string.IsNullOrEmpty(ip) || port == null || string.IsNullOrEmpty(password))
                    {
                        return Results.NotFound(new { error = "Incomplete config" });
                    }

                    return Results.Ok(new { ip, port, password });
                }
                catch (Exception ex)
                {
                    return Results.BadRequest(new { error = ex.Message });
                }
            });

            // API: 系统初始化配置
            // 首次运行时设置 RCON 连接信息和管理员账号
            app.MapPost("/api/setup", async (SetupRequest req, HttpContext ctx) =>
            {
                if (Program.isConfigured) return Results.BadRequest(new { error = "系统已初始化，禁止重复配置" });

                if (string.IsNullOrWhiteSpace(req.Ip) || req.Port <= 0 || req.Port > 65535 || string.IsNullOrWhiteSpace(req.Password))
                {
                    return Results.BadRequest(new { error = "RCON 配置无效" });
                }

                if (string.IsNullOrWhiteSpace(req.WebUser))
                {
                    return Results.BadRequest(new { error = "Web 用户名不能为空" });
                }

                string generatedPwd = "";
                if (string.IsNullOrWhiteSpace(req.WebPassword))
                {
                    generatedPwd = Program.GenerateRandomPassword();
                    req.WebPassword = generatedPwd;
                }
                else if (!Program.ValidatePassword(req.WebPassword))
                {
                    return Results.BadRequest(new { error = "密码强度不足" });
                }

                // 保存配置
                Program.Config.Ip = req.Ip;
                Program.Config.Port = req.Port;
                Program.Config.Password = req.Password;
                Program.Config.WebUser = req.WebUser;
                Program.Config.WebPassword = req.WebPassword;

                try
                {
                    Program.SaveConfigToFile();

                    Program.isConfigured = true;

                    // 初始化 RCON
                    await Program.InitializeRcon();

                    return Results.Ok(new { success = true, generatedPassword = generatedPwd });
                }
                catch (Exception ex)
                {
                    return Results.BadRequest(new { error = $"保存配置失败: {ex.Message}" });
                }
            });
        }
    }
}