using System.Security.Claims;
using Microsoft.EntityFrameworkCore;
using TafsirQuran.Api.Security;
using TafsirQuran.Domain.Entities;
using TafsirQuran.Infrastructure.Persistence;
using TafsirQuran.Shared.Dtos;

namespace TafsirQuran.Api.Endpoints;

public static class FavoriteEndpoints
{
    public static IEndpointRouteBuilder MapFavoriteEndpoints(this WebApplication app)
    {
        var group = app.MapGroup("/api/favorites/ayahs");

        group.MapGet("/", async (string? deviceId, ClaimsPrincipal user, AppDbContext db, CancellationToken ct) =>
        {
            if (!EndpointSecurity.TryResolveOwner(user, deviceId, out var userId, out var deviceKey, out var error))
                return error!;

            var query = db.AyahFavorites.AsNoTracking()
                .Include(f => f.Surah)
                .Include(f => f.Tafsir)
                .AsQueryable();

            query = userId.HasValue
                ? query.Where(f => f.UserId == userId)
                : query.Where(f => f.DeviceId == deviceKey);

            var items = await query.OrderByDescending(f => f.CreatedAt).ToListAsync(ct);

            return Results.Ok(items.Select(f => new AyahFavoriteDto(
                f.Id, f.TafsirId, f.Tafsir.Slug, f.SurahId, f.Surah.NameFa, f.AyahNumber, f.CreatedAt)).ToList());
        }).RequireRateLimiting("read");

        group.MapPost("/", async (ToggleAyahRequest request, ClaimsPrincipal user, AppDbContext db, CancellationToken ct) =>
        {
            if (!EndpointSecurity.TryResolveOwner(user, request.DeviceId, out var userId, out var deviceKey, out var error))
                return error!;

            if (!EndpointSecurity.IsValidSurahAyah(request.SurahNumber, request.AyahNumber))
                return Results.BadRequest(new { error = "invalid_ayah" });

            var exists = userId.HasValue
                ? await db.AyahFavorites.AnyAsync(f =>
                    f.TafsirId == request.TafsirId &&
                    f.SurahId == request.SurahNumber &&
                    f.AyahNumber == request.AyahNumber &&
                    f.UserId == userId, ct)
                : await db.AyahFavorites.AnyAsync(f =>
                    f.TafsirId == request.TafsirId &&
                    f.SurahId == request.SurahNumber &&
                    f.AyahNumber == request.AyahNumber &&
                    f.DeviceId == deviceKey, ct);

            if (exists) return Results.NoContent();

            db.AyahFavorites.Add(new AyahFavorite
            {
                DeviceId = deviceKey ?? request.DeviceId.Trim(),
                UserId = userId,
                TafsirId = request.TafsirId,
                SurahId = request.SurahNumber,
                AyahNumber = request.AyahNumber
            });
            await db.SaveChangesAsync(ct);
            return Results.Created($"/api/favorites/ayahs/{request.SurahNumber}/{request.AyahNumber}", null);
        }).RequireRateLimiting("write");

        group.MapDelete("/{surahNumber:int}/{ayahNumber:int}", async (
            int surahNumber, int ayahNumber, Guid tafsirId, string? deviceId, ClaimsPrincipal user, AppDbContext db, CancellationToken ct) =>
        {
            if (!EndpointSecurity.TryResolveOwner(user, deviceId, out var userId, out var deviceKey, out var error))
                return error!;

            if (!EndpointSecurity.IsValidSurahAyah(surahNumber, ayahNumber))
                return Results.BadRequest(new { error = "invalid_ayah" });

            var items = userId.HasValue
                ? await db.AyahFavorites
                    .Where(f => f.TafsirId == tafsirId && f.SurahId == surahNumber && f.AyahNumber == ayahNumber && f.UserId == userId)
                    .ToListAsync(ct)
                : await db.AyahFavorites
                    .Where(f => f.TafsirId == tafsirId && f.SurahId == surahNumber && f.AyahNumber == ayahNumber && f.DeviceId == deviceKey)
                    .ToListAsync(ct);

            db.AyahFavorites.RemoveRange(items);
            await db.SaveChangesAsync(ct);
            return Results.NoContent();
        }).RequireRateLimiting("write");

        return app;
    }
}