// EN: Reports REST API Controller.
// VI: Controller REST API cho Reports.

using Asp.Versioning;
using MediatR;
using Microsoft.AspNetCore.Mvc;
using OrderService.API.Application.Queries;

namespace OrderService.API.Controllers;

/// <summary>
/// EN: Reports API Controller for revenue and product analytics.
/// VI: Controller API Reports cho phân tích doanh thu và sản phẩm.
/// </summary>
[ApiController]
[ApiVersion("1.0")]
[Route("api/v{version:apiVersion}/reports")]
public class ReportsController : ControllerBase
{
    private readonly IMediator _mediator;
    private readonly ILogger<ReportsController> _logger;

    public ReportsController(
        IMediator mediator,
        ILogger<ReportsController> logger)
    {
        _mediator = mediator ?? throw new ArgumentNullException(nameof(mediator));
        _logger = logger ?? throw new ArgumentNullException(nameof(logger));
    }

    /// <summary>
    /// EN: Get revenue report grouped by period (daily, weekly, monthly).
    /// VI: Lấy báo cáo doanh thu theo kỳ (ngày, tuần, tháng).
    /// </summary>
    [HttpGet("revenue")]
    [ProducesResponseType(typeof(RevenueReportDto), StatusCodes.Status200OK)]
    public async Task<ActionResult<RevenueReportDto>> GetRevenueReport(
        [FromQuery] Guid shopId,
        [FromQuery] string period = "daily",
        [FromQuery] DateTime? fromDate = null,
        [FromQuery] DateTime? toDate = null,
        CancellationToken cancellationToken = default)
    {
        _logger.LogInformation(
            "EN: Getting revenue report for shop {ShopId}, period {Period} / VI: Lấy báo cáo doanh thu cho shop {ShopId}, kỳ {Period}",
            shopId, period);

        var query = new GetRevenueReportQuery(period, shopId, fromDate, toDate);
        var result = await _mediator.Send(query, cancellationToken);

        return Ok(result);
    }

    /// <summary>
    /// EN: Get top selling products.
    /// VI: Lấy sản phẩm bán chạy nhất.
    /// </summary>
    [HttpGet("top-products")]
    [ProducesResponseType(typeof(List<TopProductDto>), StatusCodes.Status200OK)]
    public async Task<ActionResult<List<TopProductDto>>> GetTopProducts(
        [FromQuery] Guid shopId,
        [FromQuery] int limit = 10,
        [FromQuery] DateTime? fromDate = null,
        [FromQuery] DateTime? toDate = null,
        CancellationToken cancellationToken = default)
    {
        _logger.LogInformation(
            "EN: Getting top {Limit} products for shop {ShopId} / VI: Lấy top {Limit} sản phẩm cho shop {ShopId}",
            limit, shopId);

        var query = new GetTopProductsQuery(shopId, limit, fromDate, toDate);
        var result = await _mediator.Send(query, cancellationToken);

        return Ok(result);
    }
}