using System.Security.Claims;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using VendingMachine.Application.Common;
using VendingMachine.Application.Services;

namespace VendingMachine.Api.Controllers;

[ApiController]
[Route("api/[controller]")]
public class CouponController : ControllerBase
{
    private readonly ICouponService _couponService;

    public CouponController(ICouponService couponService)
    {
        _couponService = couponService;
    }

    /// <summary>
    /// 获取可兑换优惠券列表
    /// </summary>
    [HttpGet("redeemable")]
    public async Task<IActionResult> GetRedeemableCoupons()
    {
        var lang = GetLanguage();
        var result = await _couponService.GetRedeemableCouponsAsync(lang);
        return Ok(result);
    }

    /// <summary>
    /// 兑换优惠券
    /// </summary>
    [Authorize]
    [HttpPost("redeem/{couponId}")]
    public async Task<IActionResult> RedeemCoupon(string couponId)
    {
        var uid = User.FindFirstValue(ClaimTypes.NameIdentifier);
        if (string.IsNullOrEmpty(uid))
            return Unauthorized(ApiResponse.Fail("未授权"));

        var result = await _couponService.RedeemCouponAsync(uid, couponId);
        return result.Success ? Ok(result) : BadRequest(result);
    }

    /// <summary>
    /// 获取用户优惠券列表
    /// </summary>
    [Authorize]
    [HttpGet("my")]
    public async Task<IActionResult> GetMyCoupons([FromQuery] string? status)
    {
        var uid = User.FindFirstValue(ClaimTypes.NameIdentifier);
        if (string.IsNullOrEmpty(uid))
            return Unauthorized(ApiResponse.Fail("未授权"));

        var lang = GetLanguage();
        var result = await _couponService.GetMyCouponsAsync(uid, status, lang);
        return Ok(result);
    }

    /// <summary>
    /// 获取印花优惠券列表
    /// </summary>
    [Authorize]
    [HttpGet("stamps")]
    public async Task<IActionResult> GetStampCoupons()
    {
        var uid = User.FindFirstValue(ClaimTypes.NameIdentifier);
        if (string.IsNullOrEmpty(uid))
            return Unauthorized(ApiResponse.Fail("未授权"));

        var lang = GetLanguage();
        var result = await _couponService.GetStampCouponsAsync(uid, lang);
        return Ok(result);
    }

    /// <summary>
    /// 兑换印花优惠券
    /// </summary>
    [Authorize]
    [HttpPost("stamps/redeem/{stampCouponId}")]
    public async Task<IActionResult> RedeemStampCoupon(string stampCouponId)
    {
        var uid = User.FindFirstValue(ClaimTypes.NameIdentifier);
        if (string.IsNullOrEmpty(uid))
            return Unauthorized(ApiResponse.Fail("未授权"));

        var result = await _couponService.RedeemStampCouponAsync(uid, stampCouponId);
        return result.Success ? Ok(result) : BadRequest(result);
    }

    /// <summary>
    /// 从请求头获取语言设置
    /// </summary>
    private string GetLanguage()
    {
        return HttpContext.Items["Language"]?.ToString() ?? "zh-CN";
    }
}