using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Authorization;
using QuotifyBE.Data;
using QuotifyBE.Entities;
using System.Security.Claims;
using Microsoft.EntityFrameworkCore;

namespace QuotifyBE.Controllers
{
    [ApiController]
    [Route("controller")]

    public class QuotesController : ControllerBase
    {
        private readonly ApplicationDbContext _db;

        public QuotesController(ApplicationDbContext db)
        {
            _db = db;
        }

        [HttpPost]
        [Authorize(Roles = "Admin")]
        public async Task<IActionResult> CreateQuote([FromBody] CreateQuoteRequest request)
        {
            // Get user ID from claims
            var userIdClaim = User.FindFirst(ClaimTypes.NameIdentifier)?.Value;
            if (userIdClaim == null || !int.TryParse(userIdClaim, out int userId))
                return Unauthorized("Invalid user ID");

            // Find or create image
            Image? image = null;
            if (!string.IsNullOrEmpty(request.ImageUrl))
            {
                image = await _db.Images.FirstOrDefaultAsync(i => i.Url == request.ImageUrl);
                if (image == null)
                {
                    image = new Image { Url = request.ImageUrl };
                    _db.Images.Add(image);
                    await _db.SaveChangesAsync();
                }
            }

            // Create quote
            var quote = new Quote
            {
                Text = request.Text,
                Author = request.Author,
                CreatedAt = DateTime.UtcNow,
                LastUpdatedAt = DateTime.UtcNow,
                ImageId = image?.Id ?? 0,
                UserId = userId,
                QuoteCategories = new List<QuoteCategory>()
            };

            // Attach categories
            foreach (var categoryId in request.CategoryIds)
            {
                var categoryExists = await _db.Categories.AnyAsync(c => c.Id == categoryId);
                if (!categoryExists)
                    return BadRequest($"Category ID {categoryId} not found");

                quote.QuoteCategories.Add(new QuoteCategory
                {
                    CategoryId = categoryId,
                    Quote = quote
                });
            }

            _db.Quotes.Add(quote);
            await _db.SaveChangesAsync();

            return CreatedAtAction(nameof(GetQuoteById), new { id = quote.Id }, quote);
        }

        [HttpGet("{id}")]
        public async Task<IActionResult> GetQuoteById(int id)
        {
            var quote = await _db.Quotes
                .Include(q => q.QuoteCategories)
                .ThenInclude(qc => qc.Category)
                .Include(q => q.User)
                .Include(q => q.ImageId)
                .FirstOrDefaultAsync(q => q.Id == id);

            if (quote == null)
                return NotFound();

            return Ok(quote);
        }
    }
}