using CampusErrand.Data;
using CampusErrand.Models;
using CampusErrand.Models.Dtos;
using Microsoft.EntityFrameworkCore;

namespace CampusErrand.Endpoints;

public static class ConfigEndpoints
{
    public static void MapConfigEndpoints(this WebApplication app)
    {
        // 获取页面顶图配置
        app.MapGet("/api/config/page-banner/{page}", async (string page, AppDbContext db) =>
        {
            var key = $"page_banner_{page}";
            var config = await db.SystemConfigs.FirstOrDefaultAsync(c => c.Key == key);
            return Results.Ok(new ConfigResponse
            {
                Key = key,
                Value = config?.Value ?? "",
                UpdatedAt = config?.UpdatedAt ?? DateTime.MinValue
            });
        });

        // 获取客服二维码
        app.MapGet("/api/config/qrcode", async (AppDbContext db) =>
        {
            var config = await db.SystemConfigs.FirstOrDefaultAsync(c => c.Key == "qrcode");
            return Results.Ok(new ConfigResponse
            {
                Key = "qrcode",
                Value = config?.Value ?? "",
                UpdatedAt = config?.UpdatedAt ?? DateTime.MinValue
            });
        });

        // 获取用户协议
        app.MapGet("/api/config/agreement", async (AppDbContext db) =>
        {
            var config = await db.SystemConfigs.FirstOrDefaultAsync(c => c.Key == "agreement");
            return Results.Ok(new ConfigResponse
            {
                Key = "agreement",
                Value = config?.Value ?? "",
                UpdatedAt = config?.UpdatedAt ?? DateTime.MinValue
            });
        });

        // 获取隐私政策
        app.MapGet("/api/config/privacy", async (AppDbContext db) =>
        {
            var config = await db.SystemConfigs.FirstOrDefaultAsync(c => c.Key == "privacy");
            return Results.Ok(new ConfigResponse
            {
                Key = "privacy",
                Value = config?.Value ?? "",
                UpdatedAt = config?.UpdatedAt ?? DateTime.MinValue
            });
        });

        // 获取跑腿协议
        app.MapGet("/api/config/runner-agreement", async (AppDbContext db) =>
        {
            var config = await db.SystemConfigs.FirstOrDefaultAsync(c => c.Key == "runner_agreement");
            return Results.Ok(new ConfigResponse
            {
                Key = "runner_agreement",
                Value = config?.Value ?? "",
                UpdatedAt = config?.UpdatedAt ?? DateTime.MinValue
            });
        });

        // 获取提现说明
        app.MapGet("/api/config/withdrawal-guide", async (AppDbContext db) =>
        {
            var config = await db.SystemConfigs.FirstOrDefaultAsync(c => c.Key == "withdrawal_guide");
            return Results.Ok(new ConfigResponse
            {
                Key = "withdrawal_guide",
                Value = config?.Value ?? "",
                UpdatedAt = config?.UpdatedAt ?? DateTime.MinValue
            });
        });

        // 获取最低佣金配置
        app.MapGet("/api/config/min-commission", async (AppDbContext db) =>
        {
            var config = await db.SystemConfigs.FirstOrDefaultAsync(c => c.Key == "min_commission");
            return Results.Ok(new ConfigResponse
            {
                Key = "min_commission",
                Value = config?.Value ?? "1.0",
                UpdatedAt = config?.UpdatedAt ?? DateTime.MinValue
            });
        });

        // 管理端获取指定配置
        app.MapGet("/api/admin/config/{key}", async (string key, AppDbContext db) =>
        {
            var config = await db.SystemConfigs.FirstOrDefaultAsync(c => c.Key == key);
            return Results.Ok(new ConfigResponse
            {
                Key = key,
                Value = config?.Value ?? "",
                UpdatedAt = config?.UpdatedAt ?? DateTime.MinValue
            });
        }).RequireAuthorization("AdminOnly");

        // 管理端更新系统配置
        app.MapPut("/api/admin/config/{key}", async (string key, UpdateConfigRequest request, AppDbContext db) =>
        {
            // 允许的配置键白名单
            var allowedKeys = new HashSet<string>
            {
                "qrcode", "agreement", "privacy", "runner_agreement", "withdrawal_guide", "freeze_days",
                "min_commission",
                "page_banner_pickup", "page_banner_delivery", "page_banner_help", "page_banner_purchase", "page_banner_food",
                "page_banner_order-hall"
            };

            if (!allowedKeys.Contains(key))
                return Results.BadRequest(new { code = 400, message = $"不支持的配置键: {key}" });

            var config = await db.SystemConfigs.FirstOrDefaultAsync(c => c.Key == key);
            if (config == null)
            {
                config = new SystemConfig
                {
                    Key = key,
                    Value = request.Value,
                    UpdatedAt = DateTime.UtcNow
                };
                db.SystemConfigs.Add(config);
            }
            else
            {
                config.Value = request.Value;
                config.UpdatedAt = DateTime.UtcNow;
            }

            await db.SaveChangesAsync();

            return Results.Ok(new ConfigResponse
            {
                Key = config.Key,
                Value = config.Value,
                UpdatedAt = config.UpdatedAt
            });
        }).RequireAuthorization("AdminOnly");

        // 图片上传接口
        app.MapPost("/api/upload/image", async (IFormFile file, IConfiguration config) =>
        {
            if (file == null || file.Length == 0)
                return Results.BadRequest(new { code = 400, message = "请选择要上传的图片" });

            // 文件大小校验（默认 5MB）
            var maxSize = config.GetValue<long>("Upload:MaxFileSizeBytes", 5242880);
            if (file.Length > maxSize)
                return Results.BadRequest(new { code = 400, message = $"图片大小不能超过 {maxSize / 1024 / 1024}MB" });

            // 文件扩展名校验
            var allowedExtensions = config.GetSection("Upload:AllowedExtensions").Get<string[]>()
                ?? new[] { ".jpg", ".jpeg", ".png", ".gif", ".webp" };
            var ext = Path.GetExtension(file.FileName).ToLowerInvariant();
            if (!allowedExtensions.Contains(ext))
                return Results.BadRequest(new { code = 400, message = $"不支持的图片格式，仅支持 {string.Join(", ", allowedExtensions)}" });

            // 上传到腾讯云 COS
            var cosConfig = new COSXML.CosXmlConfig.Builder()
                .IsHttps(true)
                .SetRegion(config["COS:Region"])
                .Build();
            var credential = new COSXML.Auth.DefaultQCloudCredentialProvider(
                config["COS:SecretId"], config["COS:SecretKey"], 600);
            var cosXml = new COSXML.CosXmlServer(cosConfig, credential);

            var bucket = config["COS:Bucket"]!;
            var cosKey = $"uploads/{DateTime.UtcNow:yyyyMMdd}/{Guid.NewGuid()}{ext}";

            // 将上传文件写入临时文件
            var tempPath = Path.GetTempFileName();
            try
            {
                using (var stream = new FileStream(tempPath, FileMode.Create))
                {
                    await file.CopyToAsync(stream);
                }

                var putRequest = new COSXML.Model.Object.PutObjectRequest(bucket, cosKey, tempPath);
                var putResult = cosXml.PutObject(putRequest);

                if (putResult.httpCode != 200)
                    return Results.BadRequest(new { code = 400, message = "图片上传失败" });

                var url = $"{config["COS:BaseUrl"]}/{cosKey}";
                return Results.Ok(new UploadImageResponse { Url = url });
            }
            finally
            {
                if (File.Exists(tempPath)) File.Delete(tempPath);
            }
        }).RequireAuthorization()
          .DisableAntiforgery();
    }
}