using Application.Dto.Statistics;
using Application;

namespace WebApi.Controllers;

/// <summary>
/// 交易统计控制器
/// </summary>
[ApiController]
[Route("api/[controller]/[action]")]
public class TransactionStatisticsController(
    ITransactionStatisticsApplication statisticsApplication
) : ControllerBase
{
    // ===== 新统一接口（推荐使用） =====
    
    /// <summary>
    /// 按日期范围获取每日统计（新统一接口）
    /// </summary>
    /// <param name="startDate">开始日期（包含）</param>
    /// <param name="endDate">结束日期（不包含）</param>
    /// <param name="savingClassify">储蓄分类（可选，不传则使用系统配置）</param>
    [HttpGet]
    public async Task<BaseResponse<List<DailyStatisticsDto>>> GetDailyStatisticsByRangeAsync(
        [FromQuery] DateTime startDate,
        [FromQuery] DateTime endDate,
        [FromQuery] string? savingClassify = null
    )
    {
        var result = await statisticsApplication.GetDailyStatisticsByRangeAsync(startDate, endDate, savingClassify);
        return result.Ok();
    }

    /// <summary>
    /// 按日期范围获取汇总统计（新统一接口）
    /// </summary>
    /// <param name="startDate">开始日期（包含）</param>
    /// <param name="endDate">结束日期（不包含）</param>
    [HttpGet]
    public async Task<BaseResponse<Service.Transaction.MonthlyStatistics>> GetSummaryByRangeAsync(
        [FromQuery] DateTime startDate,
        [FromQuery] DateTime endDate
    )
    {
        var result = await statisticsApplication.GetSummaryByRangeAsync(startDate, endDate);
        return result.Ok();
    }

    /// <summary>
    /// 按日期范围获取分类统计（新统一接口）
    /// </summary>
    /// <param name="startDate">开始日期（包含）</param>
    /// <param name="endDate">结束日期（不包含）</param>
    /// <param name="type">交易类型</param>
    [HttpGet]
    public async Task<BaseResponse<List<Service.Transaction.CategoryStatistics>>> GetCategoryStatisticsByRangeAsync(
        [FromQuery] DateTime startDate,
        [FromQuery] DateTime endDate,
        [FromQuery] TransactionType type
    )
    {
        var result = await statisticsApplication.GetCategoryStatisticsByRangeAsync(startDate, endDate, type);
        return result.Ok();
    }

    /// <summary>
    /// 获取趋势统计数据
    /// </summary>
    [HttpGet]
    public async Task<BaseResponse<List<Service.Transaction.TrendStatistics>>> GetTrendStatisticsAsync(
        [FromQuery] int startYear,
        [FromQuery] int startMonth,
        [FromQuery] int monthCount = 6
    )
    {
        var result = await statisticsApplication.GetTrendStatisticsAsync(startYear, startMonth, monthCount);
        return result.Ok();
    }

    // ===== 旧接口（保留用于向后兼容，已标记为过时） =====
    
    /// <summary>
    /// 获取累积余额统计数据（用于余额卡片图表）
    /// </summary>
    [Obsolete("请使用 GetDailyStatisticsByRangeAsync 并在前端计算累积余额")]
    [HttpGet]
    public async Task<BaseResponse<List<BalanceStatisticsDto>>> GetBalanceStatisticsAsync(
        [FromQuery] int year,
        [FromQuery] int month
    )
    {
        var result = await statisticsApplication.GetBalanceStatisticsAsync(year, month);
        return result.Ok();
    }

    /// <summary>
    /// 获取指定月份每天的消费统计
    /// </summary>
    [Obsolete("请使用 GetDailyStatisticsByRangeAsync")]
    [HttpGet]
    public async Task<BaseResponse<List<DailyStatisticsDto>>> GetDailyStatisticsAsync(
        [FromQuery] int year,
        [FromQuery] int month
    )
    {
        var result = await statisticsApplication.GetDailyStatisticsAsync(year, month);
        return result.Ok();
    }

    /// <summary>
    /// 获取周统计数据
    /// </summary>
    [Obsolete("请使用 GetDailyStatisticsByRangeAsync")]
    [HttpGet]
    public async Task<BaseResponse<List<DailyStatisticsDto>>> GetWeeklyStatisticsAsync(
        [FromQuery] DateTime startDate,
        [FromQuery] DateTime endDate
    )
    {
        var result = await statisticsApplication.GetWeeklyStatisticsAsync(startDate, endDate);
        return result.Ok();
    }

    /// <summary>
    /// 获取指定日期范围的统计汇总数据
    /// </summary>
    [Obsolete("请使用 GetSummaryByRangeAsync")]
    [HttpGet]
    public async Task<BaseResponse<Service.Transaction.MonthlyStatistics>> GetRangeStatisticsAsync(
        [FromQuery] DateTime startDate,
        [FromQuery] DateTime endDate
    )
    {
        var result = await statisticsApplication.GetRangeStatisticsAsync(startDate, endDate);
        return result.Ok();
    }

    /// <summary>
    /// 获取月度统计数据
    /// </summary>
    [Obsolete("请使用 GetSummaryByRangeAsync")]
    [HttpGet]
    public async Task<BaseResponse<Service.Transaction.MonthlyStatistics>> GetMonthlyStatisticsAsync(
        [FromQuery] int year,
        [FromQuery] int month
    )
    {
        var result = await statisticsApplication.GetMonthlyStatisticsAsync(year, month);
        return result.Ok();
    }

    /// <summary>
    /// 获取分类统计数据
    /// </summary>
    [Obsolete("请使用 GetCategoryStatisticsByRangeAsync")]
    [HttpGet]
    public async Task<BaseResponse<List<Service.Transaction.CategoryStatistics>>> GetCategoryStatisticsAsync(
        [FromQuery] int year,
        [FromQuery] int month,
        [FromQuery] TransactionType type
    )
    {
        var result = await statisticsApplication.GetCategoryStatisticsAsync(year, month, type);
        return result.Ok();
    }

    /// <summary>
    /// 按日期范围获取分类统计数据
    /// </summary>
    [Obsolete("请使用 GetCategoryStatisticsByRangeAsync（DateTime 参数版本）")]
    [HttpGet]
    public async Task<BaseResponse<List<Service.Transaction.CategoryStatistics>>> GetCategoryStatisticsByDateRangeAsync(
        [FromQuery] string startDate,
        [FromQuery] string endDate,
        [FromQuery] TransactionType type
    )
    {
        var result = await statisticsApplication.GetCategoryStatisticsByDateRangeAsync(startDate, endDate, type);
        return result.Ok();
    }
}