Build_God/Build_God_Api/Build_God_Api/Services/StatisticsService.cs

using Build_God_Api.DB;
using SqlSugar;

namespace Build_God_Api.Services
{
    public interface IStatisticsService
    {
        Task<StatisticsSummary> GetSummary();
    }

    public class StatisticsSummary
    {
        public int EquipmentCount { get; set; }
        public int LevelCount { get; set; }
        public int ProfessionCount { get; set; }
        public int PillCount { get; set; }
        public int MissionCount { get; set; }
        public Dictionary<int, int> EquipmentByRarity { get; set; } = new();
        public Dictionary<int, int> MissionByDifficulty { get; set; } = new();
    }

    public class StatisticsService(ISqlSugarClient db) : IStatisticsService
    {
        private readonly ISqlSugarClient db = db;

        public async Task<StatisticsSummary> GetSummary()
        {
            var equipmentCount = await db.Queryable<EquipmentTemplate>().CountAsync();
            var levelCount = await db.Queryable<Level>().CountAsync();
            var professionCount = await db.Queryable<Profession>().CountAsync();
            var pillCount = await db.Queryable<Pill>().CountAsync();
            var missionCount = await db.Queryable<Mission>().CountAsync();

            var equipmentByRarity = await db.Queryable<EquipmentTemplate>()
                .GroupBy(x => x.Rarity)
                .Select(x => new { Rarity = x.Rarity, Count = SqlFunc.AggregateCount(x.Id) })
                .ToListAsync();

            var missionByDifficulty = await db.Queryable<Mission>()
                .GroupBy(x => x.Difficulty)
                .Select(x => new { Difficulty = x.Difficulty, Count = SqlFunc.AggregateCount(x.Id) })
                .ToListAsync();

            return new StatisticsSummary
            {
                EquipmentCount = equipmentCount,
                LevelCount = levelCount,
                ProfessionCount = professionCount,
                PillCount = pillCount,
                MissionCount = missionCount,
                EquipmentByRarity = equipmentByRarity.ToDictionary(x => (int)x.Rarity, x => x.Count),
                MissionByDifficulty = missionByDifficulty.ToDictionary(x => (int)x.Difficulty, x => x.Count)
            };
        }
    }
}