using System;
using System.Linq;
using System.Net.Mime;
using MediaBrowser.Controller.Library;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Logging;

namespace JellyfinPlugin.Api
{
    [ApiController]
    [Route("BlackBarRemover")]
    public class BlackBarController : ControllerBase
    {
        private readonly ILibraryManager _libraryManager;
        private readonly ILogger<BlackBarController> _logger;

        public BlackBarController(ILibraryManager libraryManager, ILogger<BlackBarController> logger)
        {
            _libraryManager = libraryManager;
            _logger = logger;
        }

        [HttpGet("CropByPath")]
        public ActionResult<string> GetCropByPath([FromQuery] string path)
        {
            if (string.IsNullOrEmpty(path)) return Ok(string.Empty);
            
            var mode = Plugin.Instance!.Configuration.PlaybackMode;
            if (mode == "Client") return Ok(string.Empty);

            var item = _libraryManager.RootFolder.GetRecursiveChildren().FirstOrDefault(x => x.Path == path);
            
            if (item != null && item.ProviderIds != null && item.ProviderIds.TryGetValue("BlackBarCrop", out string? cropData))
            {
                return Ok(cropData ?? string.Empty);
            }

            return Ok(string.Empty);
        }

        [HttpGet("CropById")]
        public ActionResult<string> GetCropById([FromQuery] string itemId)
        {
            if (string.IsNullOrEmpty(itemId)) return Ok(string.Empty);

            var mode = Plugin.Instance!.Configuration.PlaybackMode;
            if (mode == "Server") return Ok(string.Empty);

            if (Guid.TryParse(itemId, out Guid id))
            {
                var item = _libraryManager.GetItemById(id);
                if (item != null && item.ProviderIds != null && item.ProviderIds.TryGetValue("BlackBarCrop", out string? cropData))
                {
                    return Ok(cropData ?? string.Empty);
                }
            }

            return Ok(string.Empty);
        }

        [HttpGet("ClientScript.js")]
        [Produces("application/javascript")]
        public ContentResult GetClientScript()
        {
            string js = @"
(function() {
    console.log('Black Bar Remover: Script loaded');
    let currentVideoElement = null;

    function applyCrop(cropData) {
        if (!currentVideoElement) return;
        const parts = cropData.split(':');
        if (parts.length === 4) {
            const w = parseInt(parts[0]);
            const h = parseInt(parts[1]);
            const x = parseInt(parts[2]);
            const y = parseInt(parts[3]);
            
            const topPercent = (y / 1080) * 100;
            const bottomPercent = ((1080 - (y + h)) / 1080) * 100;
            const leftPercent = (x / 1920) * 100;
            const rightPercent = ((1920 - (x + w)) / 1920) * 100;
            
            currentVideoElement.style.clipPath = `inset(${topPercent}% ${rightPercent}% ${bottomPercent}% ${leftPercent}%)`;
            
            const scaleY = 1 / (1 - (topPercent + bottomPercent)/100);
            const scaleX = 1 / (1 - (leftPercent + rightPercent)/100);
            const scale = Math.max(scaleY, scaleX);
            
            if (scale > 1.01) {
                currentVideoElement.style.transform = `scale(${scale})`;
            }
            console.log('Black Bar Remover: Applied crop', cropData, 'scale', scale);
        }
    }

    function checkPlayback() {
        const video = document.querySelector('video');
        if (video && video !== currentVideoElement) {
            currentVideoElement = video;
            const params = new URLSearchParams(window.location.hash.split('?')[1]);
            const itemId = params.get('id') || params.get('itemId');
            
            if (itemId) {
                fetch('/BlackBarRemover/CropById?itemId=' + itemId)
                    .then(r => r.text())
                    .then(crop => {
                        if (crop) applyCrop(crop);
                    });
            }
        } else if (!video && currentVideoElement) {
            currentVideoElement = null;
        }
    }

    setInterval(checkPlayback, 2000);
})();
";
            return Content(js, "application/javascript");
        }
    }
}