using Bibblan.Business.Services;
using Bibblan.Models;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Storage;

namespace Bibblan.Controllers
{
    [ApiController]
    [Route("api/[controller]")]
    public class CalibreController : ControllerBase
    {
        CalibreService _service;
        PostgresCalibreContext _postgresContext;
        SqliteCalibreContext _sqliteContext;

        public CalibreController(CalibreService service, SqliteCalibreContext sqliteContext, PostgresCalibreContext postgresContext) {
            _service = service;
            _postgresContext = postgresContext;
            _sqliteContext = sqliteContext;
        }

        [HttpGet("books")]
        public IActionResult GetBooks()
        {
            var books = _service.GetAllBooks().Take(100).ToList();
            return Ok(books);
        }

        [HttpGet("cover")]
        public IActionResult GetCover(string path)
        {
            var bytes = _service.Cover(path);
            return File(bytes, "image/jpeg", true);
        }

        [HttpGet("dump")]
        public IActionResult Dump()
        {
            //var e = _postgresContext.Database.EnsureCreated();
            //var script = _postgresContext.Database.GenerateCreateScript();
            // _postgresContext.Database.ExecuteSqlRaw(script);

            var books = 1;// DumpBooks(); 
            var auhtors = 1;// DumpAuthors();
            var comments = 1;// DumpComments();
            var data = 1;// DumpData();
            var identifiers = 1;// DumpIdentifiers();
            var languages = 1;// DumpLanguages();
            var publishers = 1;// DumpPublishers();
            var ratings = 1;// DumpRatings();
            var series = 1;// DumpSeries();
            var tags = 1;// DumpTags();

            var ba = 1;// Dumpa(_postgresContext, _sqliteContext.BooksAuthorsLink.OrderBy(x => x.Id), _postgresContext.BooksAuthorsLink);
            var bl = 1;// Dumpa(_postgresContext, _sqliteContext.BooksLanguagesLink.OrderBy(x => x.Id), _postgresContext.BooksLanguagesLink);
            var bp = 1;// Dumpa(_postgresContext, _sqliteContext.BooksPublishersLink.OrderBy(x => x.Id), _postgresContext.BooksPublishersLink);
            var br = 1;// Dumpa(_postgresContext, _sqliteContext.BooksRatingsLink.OrderBy(x => x.Id), _postgresContext.BooksRatingsLink);
            var bs = 1;// Dumpa(_postgresContext, _sqliteContext.BooksSeriesLink.OrderBy(x => x.Id), _postgresContext.BooksSeriesLink);
            var bt = 1;// Dumpa(_postgresContext, _sqliteContext.BooksTagsLink.OrderBy(x => x.Id), _postgresContext.BooksTagsLink);

            return Ok(new
            {
                books,
                auhtors,
                comments,
                data,
                identifiers,
                languages,
                publishers,
                ratings,
                series,
                tags,
                links = new
                {
                    ba,
                    bl,
                    bp,
                    br,
                    bs,
                    bt
                }
            });
        }

        private int Dumpa<T>(DbContext toContext, IQueryable<T> from, DbSet<T> to)
            where T : class
        {
            var current = 0;
            int step = 100;

            var done = false;
            while (!done)
            {
                var records = from.Skip(current).Take(step);
                done = records.Count() == 0;
                foreach (var record in records)
                {
                    to.Add(record);
                }
                toContext.SaveChanges();
                current += step;
            }
            return current;

        }

        private int DumpBooks() {
            var current = 0;
            int step = 100;

            var done = false;
            while (!done)
            {
                var books = _sqliteContext.Books.OrderBy(b => b.Id).Skip(current).Take(step);
                done = books.Count() == 0;
                foreach (var book in books)
                {
                    _postgresContext.Books.Add(book);
                }
                _postgresContext.SaveChanges();
                current += step;
            }
            return current;
        }

        private int DumpAuthors()
        {
            var current = 0;
            int step = 100;

            var done = false;
            while (!done)
            {
                var authors = _sqliteContext.Authors.OrderBy(b => b.Id).Skip(current).Take(step);
                done = authors.Count() == 0;
                foreach (var author in authors)
                {
                    _postgresContext.Authors.Add(author);
                }
                _postgresContext.SaveChanges();
                current += step;
            }
            return current;
        }

        private int DumpComments()
        {
            var current = 0;
            int step = 100;

            var done = false;
            while (!done)
            {
                var comments = _sqliteContext.Comments.OrderBy(b => b.Id).Skip(current).Take(step);
                done = comments.Count() == 0;
                foreach (var comment in comments)
                {
                    _postgresContext.Comments.Add(comment);
                }
                _postgresContext.SaveChanges();
                current += step;
            }
            return current;
        }

        private int DumpData()
        {
            var current = 0;
            int step = 100;

            var done = false;
            while (!done)
            {
                var data = _sqliteContext.Data.OrderBy(b => b.Id).Skip(current).Take(step);
                done = data.Count() == 0;
                foreach (var d in data)
                {
                    _postgresContext.Data.Add(d);
                }
                _postgresContext.SaveChanges();
                current += step;
            }
            return current;
        }

        private int DumpIdentifiers()
        {
            var current = 0;
            int step = 100;

            var done = false;
            while (!done)
            {
                var identifiers = _sqliteContext.Identifiers.OrderBy(b => b.Id).Skip(current).Take(step);
                done = identifiers.Count() == 0;
                foreach (var id in identifiers)
                {
                    _postgresContext.Identifiers.Add(id);
                }
                _postgresContext.SaveChanges();
                current += step;
            }
            return current;
        }

        private int DumpLanguages()
        {
            var current = 0;
            int step = 100;

            var done = false;
            while (!done)
            {
                var languages = _sqliteContext.Languages.OrderBy(b => b.Id).Skip(current).Take(step);
                done = languages.Count() == 0;
                foreach (var lang in languages)
                {
                    _postgresContext.Languages.Add(lang);
                }
                _postgresContext.SaveChanges();
                current += step;
            }
            return current;
        }

        private int DumpPublishers()
        {
            var current = 0;
            int step = 100;

            var done = false;
            while (!done)
            {
                var publishers = _sqliteContext.Publishers.OrderBy(b => b.Id).Skip(current).Take(step);
                done = publishers.Count() == 0;
                foreach (var pub in publishers)
                {
                    if(pub.Sort == null)
                    {
                        pub.Sort = pub.Name;
                    }
                    _postgresContext.Publishers.Add(pub);
                }
                _postgresContext.SaveChanges();
                current += step;
            }
            return current;
        }

        private int DumpRatings()
        {
            var current = 0;
            int step = 100;

            var done = false;
            while (!done)
            {
                var ratings = _sqliteContext.Ratings.OrderBy(b => b.Id).Skip(current).Take(step);
                done = ratings.Count() == 0;
                foreach (var rating in ratings)
                {
                    _postgresContext.Ratings.Add(rating);
                }
                _postgresContext.SaveChanges();
                current += step;
            }
            return current;
        }

        private int DumpSeries()
        {
            var current = 0;
            int step = 100;

            var done = false;
            while (!done)
            {
                var series = _sqliteContext.Series.OrderBy(b => b.Id).Skip(current).Take(step);
                done = series.Count() == 0;
                foreach (var ser in series)
                {
                    _postgresContext.Series.Add(ser);
                }
                _postgresContext.SaveChanges();
                current += step;
            }
            return current;
        }

        private int DumpTags()
        {
            var current = 0;
            int step = 100;

            var done = false;
            while (!done)
            {
                var tags = _sqliteContext.Tags.OrderBy(b => b.Id).Skip(current).Take(step);
                done = tags.Count() == 0;
                foreach (var tag in tags)
                {
                    _postgresContext.Tags.Add(tag);
                }
                _postgresContext.SaveChanges();
                current += step;
            }
            return current;
        }
    }
}