using System;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Authorization;
using System.Collections.Generic;
using System.Linq;
using Microsoft.AspNetCore.Http;
using Oqtane.Shared;
using Oqtane.Enums;
using Oqtane.Infrastructure;
using SZUAbsolventenverein.Module.HallOfFame.Services;
using Oqtane.Controllers;
using System.Net;
using System.Threading.Tasks;
using System.IO;
using Microsoft.AspNetCore.Hosting;

namespace SZUAbsolventenverein.Module.HallOfFame.Controllers
{
    [Route(ControllerRoutes.ApiRoute)]
    public class HallOfFameController : ModuleControllerBase
    {
        private readonly IHallOfFameService _HallOfFameService;
        private readonly IWebHostEnvironment _environment;

        public HallOfFameController(IHallOfFameService HallOfFameService, ILogManager logger, IHttpContextAccessor accessor, IWebHostEnvironment environment) : base(logger, accessor)
        {
            _HallOfFameService = HallOfFameService;
            _environment = environment;
        }

        // GET: api/<controller>?moduleid=x
        // GET: api/<controller>?moduleid=x
        [HttpGet]
        [Authorize(Policy = PolicyNames.ViewModule)]
        public async Task<IEnumerable<Models.HallOfFame>> Get(string moduleid)
        {
            int ModuleId;
            if (int.TryParse(moduleid, out ModuleId) && IsAuthorizedEntityId(EntityNames.Module, ModuleId))
            {
                var list = await _HallOfFameService.GetHallOfFamesAsync(ModuleId);
                if (User.IsInRole(RoleNames.Admin) || User.IsInRole(RoleNames.Host))
                {
                    return list;
                }
                return list.Where(item => item.Status == "Published");
            }
            else
            {
                _logger.Log(LogLevel.Error, this, LogFunction.Security, "Unauthorized HallOfFame Get Attempt {ModuleId}", moduleid);
                HttpContext.Response.StatusCode = (int)HttpStatusCode.Forbidden;
                return null;
            }
        }

        // GET api/<controller>/5
        [HttpGet("{id}/{moduleid}")]
        [Authorize(Policy = PolicyNames.ViewModule)]
        public async Task<Models.HallOfFame> Get(int id, int moduleid)
        {
            Models.HallOfFame HallOfFame = await _HallOfFameService.GetHallOfFameAsync(id, moduleid);
            if (HallOfFame != null && IsAuthorizedEntityId(EntityNames.Module, HallOfFame.ModuleId))
            {
                return HallOfFame;
            }
            else
            { 
                _logger.Log(LogLevel.Error, this, LogFunction.Security, "Unauthorized HallOfFame Get Attempt {HallOfFameId} {ModuleId}", id, moduleid);
                HttpContext.Response.StatusCode = (int)HttpStatusCode.Forbidden;
                return null;
            }
        }

        // GET api/<controller>/user/5?moduleid=x
        [HttpGet("user/{userid}")]
        [Authorize(Policy = PolicyNames.ViewModule)]
        public async Task<Models.HallOfFame> GetByUserId(int userid, string moduleid)
        {
            int ModuleId;
             if (int.TryParse(moduleid, out ModuleId) && IsAuthorizedEntityId(EntityNames.Module, ModuleId))
            {
                var list = await _HallOfFameService.GetHallOfFamesAsync(ModuleId);
                return list.FirstOrDefault(item => item.UserId == userid);
            }
            else
            {
                _logger.Log(LogLevel.Error, this, LogFunction.Security, "Unauthorized HallOfFame GetByUserId Attempt {UserId} {ModuleId}", userid, moduleid);
                HttpContext.Response.StatusCode = (int)HttpStatusCode.Forbidden;
                return null;
            }
        }

        // POST api/<controller>
        [HttpPost]
        [Authorize(Policy = PolicyNames.EditModule)]
        public async Task<Models.HallOfFame> Post([FromBody] Models.HallOfFame HallOfFame)
        {
            if (ModelState.IsValid && IsAuthorizedEntityId(EntityNames.Module, HallOfFame.ModuleId))
            {
                // Enforce one entry per user
                var allEntries = await _HallOfFameService.GetHallOfFamesAsync(HallOfFame.ModuleId);
                if (allEntries.Any(e => e.UserId == HallOfFame.UserId))
                {
                    _logger.Log(LogLevel.Error, this, LogFunction.Security, "User {UserId} already has a Hall of Fame entry.", HallOfFame.UserId);
                     HttpContext.Response.StatusCode = (int)HttpStatusCode.BadRequest;
                     return null;
                }

                HallOfFame = await _HallOfFameService.AddHallOfFameAsync(HallOfFame);
            }
            else
            {
                _logger.Log(LogLevel.Error, this, LogFunction.Security, "Unauthorized HallOfFame Post Attempt {HallOfFame}", HallOfFame);
                HttpContext.Response.StatusCode = (int)HttpStatusCode.Forbidden;
                HallOfFame = null;
            }
            return HallOfFame;
        }

        // PUT api/<controller>/5
        [HttpPut("{id}")]
        [Authorize(Policy = PolicyNames.EditModule)]
        public async Task<Models.HallOfFame> Put(int id, [FromBody] Models.HallOfFame HallOfFame)
        {
            if (ModelState.IsValid && HallOfFame.HallOfFameId == id && IsAuthorizedEntityId(EntityNames.Module, HallOfFame.ModuleId))
            {
                var existing = await _HallOfFameService.GetHallOfFameAsync(id, HallOfFame.ModuleId);
                if (existing != null && existing.UserId == HallOfFame.UserId)
                {
                     HallOfFame = await _HallOfFameService.UpdateHallOfFameAsync(HallOfFame);
                }
                else
                {
                     _logger.Log(LogLevel.Error, this, LogFunction.Security, "Unauthorized HallOfFame Put Attempt by User {UserId} for Entry {HallOfFameId}", HallOfFame.UserId, id);
                     HttpContext.Response.StatusCode = (int)HttpStatusCode.Forbidden;
                     HallOfFame = null;
                }
            }
            else
            {
                _logger.Log(LogLevel.Error, this, LogFunction.Security, "Unauthorized HallOfFame Put Attempt {HallOfFame}", HallOfFame);
                HttpContext.Response.StatusCode = (int)HttpStatusCode.Forbidden;
                HallOfFame = null;
            }
            return HallOfFame;
        }

        // PUT api/<controller>/report/5
        [HttpPut("report/{id}")]
        [Authorize(Policy = PolicyNames.ViewModule)]
        public async Task Report(int id, [FromQuery] string reason)
        {
            Models.HallOfFame HallOfFame = await _HallOfFameService.GetHallOfFameAsync(id, -1);
            if (HallOfFame != null && IsAuthorizedEntityId(EntityNames.Module, HallOfFame.ModuleId))
            {
                await _HallOfFameService.ReportAsync(id, HallOfFame.ModuleId, reason);
            }
        }

        // GET api/<controller>/reports/5?moduleid=x
        [HttpGet("reports/{id}")]
        [Authorize(Policy = PolicyNames.EditModule)]
        public async Task<IEnumerable<Models.HallOfFameReport>> GetReports(int id, string moduleid)
        {
            int ModuleId;
            if (int.TryParse(moduleid, out ModuleId) && IsAuthorizedEntityId(EntityNames.Module, ModuleId))
            {
                return await _HallOfFameService.GetHallOfFameReportsAsync(id, ModuleId);
            }
            else
            {
                _logger.Log(LogLevel.Error, this, LogFunction.Security, "Unauthorized HallOfFame GetReports Attempt {HallOfFameId} {ModuleId}", id, moduleid);
                HttpContext.Response.StatusCode = (int)HttpStatusCode.Forbidden;
                return null;
            }
        }

        // DELETE api/<controller>/report/5/x
        [HttpDelete("report/{id}/{moduleid}")]
        [Authorize(Policy = PolicyNames.EditModule)]
        public async Task DeleteReport(int id, int moduleid)
        {
            if (IsAuthorizedEntityId(EntityNames.Module, moduleid))
            {
                await _HallOfFameService.DeleteHallOfFameReportAsync(id, moduleid);
            }
        }

        [HttpDelete("{id}/{moduleid}")]
        [Authorize(Policy = PolicyNames.EditModule)]
        public async Task Delete(int id, int moduleid)
        {
            Models.HallOfFame HallOfFame = await _HallOfFameService.GetHallOfFameAsync(id, moduleid);
            if (HallOfFame != null && IsAuthorizedEntityId(EntityNames.Module, HallOfFame.ModuleId))
            {
                await _HallOfFameService.DeleteHallOfFameAsync(id, HallOfFame.ModuleId);
            }
            else
            {
                _logger.Log(LogLevel.Error, this, LogFunction.Security, "Unauthorized HallOfFame Delete Attempt {HallOfFameId} {ModuleId}", id, moduleid);
                HttpContext.Response.StatusCode = (int)HttpStatusCode.Forbidden;
            }
        }
        [HttpPost("upload")]
        [Authorize(Policy = PolicyNames.EditModule)]
        public async Task<IActionResult> Upload(IFormFile file)
        {
            if (file == null || file.Length == 0) return BadRequest("Keine Datei ausgewählt.");

            var extension = Path.GetExtension(file.FileName).ToLower();
            if (extension != ".jpg" && extension != ".jpeg" && extension != ".png")
            {
                return BadRequest("Nur JPG und PNG Dateien sind erlaubt.");
            }

            var folder = Path.Combine(_environment.WebRootPath, "Content", "HallOfFame");
            if (!Directory.Exists(folder))
            {
                Directory.CreateDirectory(folder);
            }

            var fileName = Guid.NewGuid().ToString() + extension;
            var path = Path.Combine(folder, fileName);

            using (var stream = new FileStream(path, FileMode.Create))
            {
                await file.CopyToAsync(stream);
            }

            return Ok(new { url = "/Content/HallOfFame/" + fileName });
        }
    }
}