using Apimanager_backend.Data;
using Apimanager_backend.Dtos;
using AutoMapper;
using Microsoft.EntityFrameworkCore;

namespace Apimanager_backend.Services
{
    public class SystemInfoService : ISystemInfoService
    {
        private readonly ApiContext _context;
        private readonly IMapper _mapper;
        public SystemInfoService(ApiContext apiContext,IMapper mapper)
        {
            _context = apiContext;
            _mapper = mapper;
        }
        public async Task<SystemInfoDto> GetSystemInfoAsync()
        {
            return new SystemInfoDto()
            {
                UserCount = await GetUserCount(),
                OrderCount = await GetOrderCount(),
                CallCount = await GetCallCount(),
                Money = await GetMoney(),
                RecentOrder = await GetRecentOrder(),
                RecentUser = await GetRecentUser()
            };
        }
        #region 获取用户数量
        private async Task<int> GetUserCount()
        {
            return await _context.Users.CountAsync();
        }
        #endregion
        #region 获取订单数量
        private async Task<int> GetOrderCount()
        {
            return await _context.Orders.CountAsync();
        }
        #endregion
        #region 获取API调用次数
        private async Task<int> GetCallCount()
        {
            return await _context.CallLogs.CountAsync();
        }
        #endregion
        #region 获取最近一周用户
        private async Task<List<UserInfoDto>> GetRecentUser()
        {
            DateTime dateTime = DateTime.Now.AddDays(-7);
            var users = _context.Users.Where(x => x.CreatedAt >= dateTime);
            return _mapper.Map<List<UserInfoDto>>(await users.ToListAsync());
        }
        #endregion
        #region 获取最近一周订单
        private async Task<List<OrderDto>> GetRecentOrder()
        {
            DateTime dateTime = DateTime.Now.AddDays(-7);
            var orders = _context.Orders.Include(x => x.User).Where(x => x.CreatedAt >= dateTime);
            return _mapper.Map<List<OrderDto>>(await orders.ToListAsync());
        }
        #endregion
        #region 获取金额数
        public async Task<decimal> GetMoney()
        {
            return await _context.Orders.Where(x => x.OrderType == Models.OrderType.Recharge).SumAsync(x => x.Amount);
        }
        #endregion
    }
}