using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using OnProfNext.Server.Data;
using OnProfNext.Shared.Models;
using OnProfNext.Shared.Models.DTOs;
using System.Text.Json;

namespace OnProfNext.Server.Controllers
{
    [ApiController]
    [Route("api/[controller]")]
    [Authorize]
    public class BookingsController : ControllerBase
    {
        private readonly AppDbContext _context;

        public BookingsController(AppDbContext context)
        {
            _context = context;
        }

        private int GetCurrentUserId()
        {
            var userIdClaim = User.FindFirst("UserId")?.Value;
            if (string.IsNullOrEmpty(userIdClaim))
                throw new UnauthorizedAccessException("Kein User-Claim im Token gefunden.");

            return int.Parse(userIdClaim);
        }

        [HttpGet("mine")]
        public async Task<ActionResult<IEnumerable<BookingDto>>> GetMyBookings()
        {
            var userId = GetCurrentUserId();

            var bookings = await _context.Bookings
                .Include(b => b.Order)
                .Where(b => b.UserId == userId)
                .OrderByDescending(b => b.Date)
                .Select(b => new BookingDto
                {
                    Id = b.Id,
                    OrderId = b.OrderId,
                    OrderTitle = b.Order != null ? b.Order.Titel : "",
                    UserId = b.UserId,
                    Date = b.Date,
                    Hours = b.Hours,
                    Description = b.Description,
                    MandantId = b.MandantId,
                    IsPending = false
                })
                .ToListAsync();

            Console.WriteLine($"Returning bookings: {JsonSerializer.Serialize(bookings, new JsonSerializerOptions { WriteIndented = true })}");
            return Ok(bookings);
        }

        [HttpGet("byproject/{projectId}")]
        public async Task<ActionResult<IEnumerable<BookingDto>>> GetBookingsByProject(int projectId)
        {
            var bookings = await _context.Bookings
                .Include(b => b.Order)
                .ThenInclude(o => o.Project)
                .Include(b => b.User)
                .Where(b => b.Order!.ProjectId == projectId)
                .Select(b => new BookingDto
                {
                    Id = b.Id,
                    OrderId = b.OrderId,
                    OrderTitle = b.Order!.Titel,
                    UserId = b.UserId,
                    Username = $"{b.User!.FirstName} {b.User.LastName}",
                    Date = b.Date,
                    Hours = b.Hours,
                    Description = b.Description,
                    MandantId = b.MandantId,
                    IsPending = false
                })
                .ToListAsync();

            Console.WriteLine($"Returning bookings for project {projectId}: {JsonSerializer.Serialize(bookings, new JsonSerializerOptions { WriteIndented = true })}");
            return Ok(bookings);
        }

        [HttpPost]
        public async Task<ActionResult<BookingDto>> CreateBooking([FromBody] BookingCreateDto dto)
        {
            var userId = GetCurrentUserId();

            // Logge die rohe HTTP-Payload
            var rawRequest = await new StreamReader(Request.BodyReader.AsStream()).ReadToEndAsync();
            Console.WriteLine($"Raw HTTP request body: {rawRequest}");
            Console.WriteLine($"Received booking DTO: {JsonSerializer.Serialize(dto, new JsonSerializerOptions { WriteIndented = true })}");
            Console.WriteLine($"Received booking: Date={dto.Date.ToString("dd.MM.yyyy HH:mm:ss")} (Kind: {dto.Date.Kind})");

            var booking = new Booking
            {
                OrderId = dto.OrderId,
                UserId = userId,
                Date = dto.Date,
                Hours = dto.Hours,
                Description = dto.Description,
                MandantId = dto.MandantId,
                CreatedAt = DateTime.UtcNow,
                UpdatedAt = DateTime.UtcNow
            };

            _context.Bookings.Add(booking);
            await _context.SaveChangesAsync();

            var createdDto = new BookingDto
            {
                Id = booking.Id,
                OrderId = booking.OrderId,
                UserId = booking.UserId,
                Date = booking.Date,
                Hours = booking.Hours,
                Description = booking.Description,
                MandantId = booking.MandantId,
                IsPending = false
            };

            Console.WriteLine($"Created booking: ID={booking.Id}, Date={booking.Date.ToString("dd.MM.yyyy HH:mm:ss")} (Kind: {booking.Date.Kind})");
            return CreatedAtAction(nameof(GetMyBookings), new { id = booking.Id }, createdDto);
        }

        [HttpPut("{id}")]
        public async Task<IActionResult> UpdateBooking(int id, BookingCreateDto dto)
        {
            var userId = GetCurrentUserId();
            Console.WriteLine($"Updating booking ID={id}: Date={dto.Date.ToString("dd.MM.yyyy HH:mm:ss")} (Kind: {dto.Date.Kind})");

            var booking = await _context.Bookings.FirstOrDefaultAsync(b => b.Id == id && b.UserId == userId);
            if (booking == null) return NotFound();

            booking.OrderId = dto.OrderId;
            booking.Date = dto.Date;
            booking.Hours = dto.Hours;
            booking.Description = dto.Description;
            booking.UpdatedAt = DateTime.UtcNow;

            await _context.SaveChangesAsync();
            Console.WriteLine($"Updated booking ID={id}: Date={booking.Date.ToString("dd.MM.yyyy HH:mm:ss")} (Kind: {booking.Date.Kind})");
            return NoContent();
        }

        [HttpDelete("{id}")]
        public async Task<IActionResult> DeleteBooking(int id)
        {
            var userId = GetCurrentUserId();
            var booking = await _context.Bookings.FirstOrDefaultAsync(b => b.Id == id && b.UserId == userId);
            if (booking == null)
                return NotFound();

            Console.WriteLine($"Deleting booking ID={id}");
            _context.Bookings.Remove(booking);
            await _context.SaveChangesAsync();
            Console.WriteLine($"Deleted booking ID={id}");
            return NoContent();
        }
    }
}