using Asp.Versioning;
using MediatR;
using Microsoft.AspNetCore.Mvc;
using AdsTrackingService.Domain.AggregatesModel.AttributionAggregate;

namespace AdsTrackingService.API.Controllers.Admin;

/// <summary>
/// EN: Admin controller for attribution analytics and reports.
/// VI: Controller admin cho phân tích và báo cáo attribution.
/// </summary>
[ApiController]
[ApiVersion("1.0")]
[Route("api/v{version:apiVersion}/admin/ads-tracking/attribution")]
public class AdminAttributionController : ControllerBase
{
    private readonly IMediator _mediator;
    private readonly ILogger<AdminAttributionController> _logger;

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

    /// <summary>
    /// EN: Get attribution statistics by model.
    /// VI: Lấy thống kê attribution theo model.
    /// </summary>
    [HttpGet("stats")]
    [ProducesResponseType(typeof(AttributionStatsDto), StatusCodes.Status200OK)]
    public async Task<ActionResult<AttributionStatsDto>> GetAttributionStats(
        [FromQuery] DateTime? from = null,
        [FromQuery] DateTime? to = null,
        CancellationToken ct = default)
    {
        var stats = new AttributionStatsDto(
            TotalAttributions: 500,
            TotalAttributedValue: 2000000m,
            AttributionsByModel: new Dictionary<string, AttributionModelStats>
            {
                ["LastClick"] = new(250, 1000000m),
                ["FirstClick"] = new(150, 600000m),
                ["Linear"] = new(100, 400000m)
            }
        );

        _logger.LogInformation("Admin: Retrieved attribution stats");
        return Ok(stats);
    }

    /// <summary>
    /// EN: Get attribution report for a specific campaign.
    /// VI: Lấy báo cáo attribution cho campaign cụ thể.
    /// </summary>
    [HttpGet("campaigns/{campaignId:guid}")]
    [ProducesResponseType(typeof(CampaignAttributionReportDto), StatusCodes.Status200OK)]
    public async Task<ActionResult<CampaignAttributionReportDto>> GetCampaignAttributionReport(
        Guid campaignId,
        [FromQuery] DateTime? from = null,
        [FromQuery] DateTime? to = null,
        CancellationToken ct = default)
    {
        var report = new CampaignAttributionReportDto(
            campaignId,
            TotalConversions: 100,
            TotalAttributedValue: 500000m,
            AttributionBreakdown: new Dictionary<string, int>
            {
                ["LastClick"] = 60,
                ["FirstClick"] = 30,
                ["Linear"] = 10
            },
            TopAds: new List<AdAttributionDto>
            {
                new(Guid.NewGuid(), 50, 250000m)
            }
        );

        _logger.LogInformation("Admin: Retrieved attribution report for campaign {CampaignId}", campaignId);
        return Ok(report);
    }
}

// DTOs for Admin Attribution
public record AttributionStatsDto(
    int TotalAttributions,
    decimal TotalAttributedValue,
    Dictionary<string, AttributionModelStats> AttributionsByModel
);

public record AttributionModelStats(int Count, decimal TotalValue);

public record CampaignAttributionReportDto(
    Guid CampaignId,
    int TotalConversions,
    decimal TotalAttributedValue,
    Dictionary<string, int> AttributionBreakdown,
    List<AdAttributionDto> TopAds
);

public record AdAttributionDto(Guid AdId, int Conversions, decimal AttributedValue);