using Cleanuparr.Infrastructure.Stats;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;

namespace Cleanuparr.Api.Controllers;

/// <summary>
/// Aggregated statistics endpoint for dashboard integrations.
/// Deprecated. Use <c>GET /api/v2/stats</c> instead.
/// </summary>
[ApiController]
[Route("api/[controller]")]
[Authorize]
public class StatsController : ControllerBase
{
    private static readonly DateTimeOffset SunsetDate = new(2026, 9, 1, 0, 0, 0, TimeSpan.Zero);

    private readonly IStatsService _statsService;

    public StatsController(IStatsService statsService)
    {
        _statsService = statsService;
    }

    /// <summary>
    /// Gets aggregated application statistics for the specified timeframe.
    /// Deprecated. Use <c>GET /api/v2/stats</c> instead. Responses carry Deprecation/Link headers.
    /// </summary>
    /// <param name="hours">Timeframe in hours (default 24, range 1-720)</param>
    /// <param name="includeEvents">Number of recent events to include (0 = none, max 100)</param>
    /// <param name="includeStrikes">Number of recent strikes to include (0 = none, max 100)</param>
    [HttpGet]
    public async Task<IActionResult> GetStats(
        [FromQuery] int hours = 24,
        [FromQuery] int includeEvents = 0,
        [FromQuery] int includeStrikes = 0)
    {
        Response.Headers["Deprecation"] = "true";
        Response.Headers["Sunset"] = SunsetDate.ToString("R");
        Response.Headers["Link"] =
            "</api/v2/stats>; rel=\"successor-version\", " +
            "<https://cleanuparr.github.io/Cleanuparr/docs/configuration/stats>; rel=\"deprecation\"";

        if (DateTimeOffset.UtcNow >= SunsetDate)
        {
            return NotFound();
        }

        hours = Math.Clamp(hours, 1, 720);
        includeEvents = Math.Clamp(includeEvents, 0, 100);
        includeStrikes = Math.Clamp(includeStrikes, 0, 100);

        var stats = await _statsService.GetStatsAsync(hours, includeEvents, includeStrikes);
        return Ok(stats);
    }
}