using System.Linq.Expressions;
using MyHomePage.Api.Infrastructure.Database;
using SqlSugar;

namespace MyHomePage.Api.Repositories;

/// <summary>通用仓储接口：覆盖最常用的 CRUD 能力。</summary>
/// <typeparam name="T">实体类型</typeparam>
public interface IBaseRepository<T> where T : class, new()
{
    Task<T?> GetByIdAsync(int id);
    Task<List<T>> ListAsync(Expression<Func<T, bool>>? where = null);
    Task<int> InsertAsync(T entity);
    Task<int> UpdateAsync(T entity);
    Task<int> DeleteAsync(int id);
}

/// <summary>通用仓储实现：直接包装 SqlSugar 客户端。</summary>
public class BaseRepository<T> : IBaseRepository<T> where T : class, new()
{
    protected readonly ISqlSugarClient Db;

    public BaseRepository(SqlSugarContext ctx)
    {
        Db = ctx.Db;
    }

    public Task<T?> GetByIdAsync(int id) =>
        Db.Queryable<T>().InSingleAsync(id);

    public Task<List<T>> ListAsync(Expression<Func<T, bool>>? where = null) =>
        where is null
            ? Db.Queryable<T>().ToListAsync()
            : Db.Queryable<T>().Where(where).ToListAsync();

    public Task<int> InsertAsync(T entity) =>
        Db.Insertable(entity).ExecuteReturnIdentityAsync();

    public Task<int> UpdateAsync(T entity) =>
        Db.Updateable(entity).ExecuteCommandAsync();

    public Task<int> DeleteAsync(int id) =>
        Db.Deleteable<T>().In(id).ExecuteCommandAsync();
}