using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using DBConnection;
using DBConnection.Models;
using DBConnection.Repositories;
using DBConnection.Repositories.Interfaces;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Shared.Models.DTO;
using WebNovelPortalAPI.Scrapers;

namespace WebNovelPortalAPI.Controllers
{
    [Route("api/[controller]")]
    [ApiController]
    public class NovelController : ControllerBase
    {
        private readonly INovelRepository _novelRepository;
        private readonly IEnumerable<IScraper> _scrapers;

        public NovelController(IEnumerable<IScraper> scrapers, INovelRepository novelRepository)
        {
            _scrapers = scrapers;
            _novelRepository = novelRepository;
        }

        private IScraper? MatchScraper(string novelUrl)
        {
            return _scrapers.FirstOrDefault(i => i.MatchesUrl(novelUrl));
        }

        [HttpGet]
        [Route("{guid:guid}")]
        public async Task<Novel?> GetNovel(Guid guid)
        {
            return await _novelRepository.GetNovel(guid);
        }

        [HttpGet]
        public async Task<List<Novel>> GetNovels()
        {
            return (await _novelRepository.GetAllIncluded()).ToList();
        }

        [HttpPost]
        [Route("scrapeNovel")]
        public async Task<IActionResult> ScrapeNovel(ScrapeNovelRequest request)
        {
            var scraper = MatchScraper(request.NovelUrl);
            if (scraper == null)
            {
                return BadRequest("Invalid url, no valid scraper configured");
            }

            Novel novel;
            try
            {
                novel = scraper.ScrapeNovel(request.NovelUrl);
            }
            catch (Exception e)
            {
                return StatusCode(500, e);
            }

            var novelUpload = await _novelRepository.Upsert(novel);
            return Ok(novelUpload);
        }
    }
}