using Microsoft.EntityFrameworkCore;
using YesChef.Api.Auth;
using YesChef.Api.Data;
using YesChef.Api.Entities;
using YesChef.Api.Features.ShoppingLists;

namespace YesChef.Api.Features.Recipes;

public static class RecipeEndpoints
{
    public record IngredientRequest(string Name, string? Quantity, int SortOrder, int? ProductId = null, int? FamilyProductId = null);
    public record CreateRecipeRequest(string Title, string? Description, string? Instructions, int? Servings, string? SourceUrl, List<IngredientRequest> Ingredients);
    public record UpdateRecipeRequest(string Title, string? Description, string? Instructions, int? Servings, string? SourceUrl, List<IngredientRequest> Ingredients);

    public static RouteGroupBuilder MapRecipeEndpoints(this RouteGroupBuilder group)
    {
        group.MapGet("/", async (YesChefDb db, HttpContext http, string? q) =>
        {
            var familyId = http.User.GetFamilyId();
            var query = db.Recipes.Where(r => r.FamilyId == familyId);
            if (!string.IsNullOrWhiteSpace(q))
                query = query.Where(r => r.Title.Contains(q));

            return await query.OrderByDescending(r => r.UpdatedAt)
                .Select(r => new
                {
                    r.Id,
                    r.Title,
                    r.Description,
                    r.Servings,
                    IngredientCount = r.Ingredients.Count,
                    r.UpdatedAt
                })
                .ToListAsync();
        });

        group.MapPost("/", async (CreateRecipeRequest request, YesChefDb db, HttpContext http) =>
        {
            var familyId = http.User.GetFamilyId();

            foreach (var ing in request.Ingredients)
            {
                if (await ShoppingListEndpoints.ValidateProductLink(db, familyId, ing.ProductId, ing.FamilyProductId) is { } error)
                    return error;
            }

            var recipe = new Recipe
            {
                FamilyId = familyId,
                Title = request.Title,
                Description = request.Description,
                Instructions = request.Instructions,
                Servings = request.Servings,
                SourceUrl = request.SourceUrl,
                CreatedByUserId = http.User.GetUserId(),
                Ingredients = request.Ingredients.Select(i => new RecipeIngredient
                {
                    FamilyId = familyId,
                    Name = i.Name,
                    Quantity = i.Quantity,
                    SortOrder = i.SortOrder,
                    ProductId = i.ProductId,
                    FamilyProductId = i.FamilyProductId
                }).ToList()
            };

            db.Recipes.Add(recipe);
            await db.SaveChangesAsync();
            return Results.Created($"/api/recipes/{recipe.Id}", new { recipe.Id, recipe.Title });
        });

        group.MapGet("/{id:int}", async (int id, YesChefDb db, HttpContext http) =>
        {
            var familyId = http.User.GetFamilyId();
            var recipe = await db.Recipes
                .Where(r => r.Id == id && r.FamilyId == familyId)
                .Include(r => r.Ingredients.OrderBy(i => i.SortOrder))
                .Include(r => r.CreatedByUser)
                .FirstOrDefaultAsync();

            if (recipe is null) return Results.NotFound();

            return Results.Ok(new
            {
                recipe.Id,
                recipe.Title,
                recipe.Description,
                recipe.Instructions,
                recipe.Servings,
                recipe.SourceUrl,
                CreatedBy = recipe.CreatedByUser.Name,
                recipe.UpdatedAt,
                Ingredients = recipe.Ingredients.Select(i => new { i.Id, i.Name, i.Quantity, i.SortOrder, i.ProductId, i.FamilyProductId })
            });
        });

        group.MapPut("/{id:int}", async (int id, UpdateRecipeRequest request, YesChefDb db, HttpContext http) =>
        {
            var familyId = http.User.GetFamilyId();
            var recipe = await db.Recipes
                .Where(r => r.Id == id && r.FamilyId == familyId)
                .Include(r => r.Ingredients)
                .FirstOrDefaultAsync();
            if (recipe is null) return Results.NotFound();

            foreach (var ing in request.Ingredients)
            {
                if (await ShoppingListEndpoints.ValidateProductLink(db, familyId, ing.ProductId, ing.FamilyProductId) is { } error)
                    return error;
            }

            recipe.Title = request.Title;
            recipe.Description = request.Description;
            recipe.Instructions = request.Instructions;
            recipe.Servings = request.Servings;
            recipe.SourceUrl = request.SourceUrl;
            recipe.UpdatedAt = DateTime.UtcNow;

            db.RecipeIngredients.RemoveRange(recipe.Ingredients);
            recipe.Ingredients = request.Ingredients.Select(i => new RecipeIngredient
            {
                FamilyId = familyId,
                Name = i.Name,
                Quantity = i.Quantity,
                SortOrder = i.SortOrder,
                ProductId = i.ProductId,
                FamilyProductId = i.FamilyProductId
            }).ToList();

            await db.SaveChangesAsync();
            return Results.Ok(new { recipe.Id, recipe.Title });
        });

        group.MapDelete("/{id:int}", async (int id, YesChefDb db, HttpContext http) =>
        {
            var familyId = http.User.GetFamilyId();
            var recipe = await db.Recipes.FirstOrDefaultAsync(r => r.Id == id && r.FamilyId == familyId);
            if (recipe is null) return Results.NotFound();

            db.Recipes.Remove(recipe);
            await db.SaveChangesAsync();
            return Results.NoContent();
        });

        return group;
    }
}