using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using VendingMachine.Infrastructure.Data;

namespace VendingMachine.Api.Controllers;

/// <summary>
/// 管理后台 - 用户管理控制器
/// </summary>
[ApiController]
[Route("api/admin/user")]
[Authorize]
public class AdminUserController : ControllerBase
{
    private readonly AppDbContext _db;

    public AdminUserController(AppDbContext db)
    {
        _db = db;
    }

    /// <summary>
    /// 获取用户列表（分页、搜索）
    /// </summary>
    [HttpGet]
    public async Task<IActionResult> GetUsers(
        [FromQuery] int page = 1,
        [FromQuery] int size = 20,
        [FromQuery] string? search = null)
    {
        var query = _db.Users.AsQueryable();

        // 按手机号或 UID 搜索
        if (!string.IsNullOrWhiteSpace(search))
        {
            query = query.Where(u => u.Phone.Contains(search) || u.Uid.Contains(search));
        }

        var total = await query.CountAsync();
        var items = await query
            .OrderByDescending(u => u.CreatedAt)
            .Skip((page - 1) * size)
            .Take(size)
            .Select(u => new
            {
                u.Uid,
                u.Phone,
                u.Nickname,
                u.IsMember,
                MembershipType = u.MembershipType.ToString(),
                u.MembershipExpireAt,
                u.PointsBalance,
                u.Language,
                u.CreatedAt
            })
            .ToListAsync();

        return Ok(new { success = true, data = new { items, total, page, size } });
    }

    /// <summary>
    /// 获取用户详情
    /// </summary>
    [HttpGet("{uid}")]
    public async Task<IActionResult> GetUserDetail(string uid)
    {
        var user = await _db.Users.FirstOrDefaultAsync(u => u.Uid == uid);
        if (user == null)
            return NotFound(new { success = false, message = "用户不存在" });

        // 获取用户优惠券数量
        var couponCount = await _db.UserCoupons.CountAsync(c => c.UserId == uid);

        // 获取用户积分记录数量
        var pointRecordCount = await _db.PointRecords.CountAsync(p => p.UserId == uid);

        return Ok(new
        {
            success = true,
            data = new
            {
                user.Uid,
                user.Phone,
                user.Nickname,
                user.IsMember,
                MembershipType = user.MembershipType.ToString(),
                user.MembershipExpireAt,
                user.PointsBalance,
                user.PointsExpireAt,
                user.Language,
                user.CreatedAt,
                CouponCount = couponCount,
                PointRecordCount = pointRecordCount
            }
        });
    }
}