using System.Linq;
using Content.Shared.Kitchen.Components;
using JetBrains.Annotations;
using Robust.Shared.Utility;

namespace Content.Shared.Kitchen.EntitySystems;

public abstract partial class MicrowaveSystem
{
    /// <summary>
    /// Helper function to get if an entity is an active microwave.
    /// </summary>
    /// <param name="microwave">The microwave entity.</param>
    /// <returns>Whether or not this entity is an active microwave.</returns>
    [PublicAPI]
    public bool IsActiveMicrowave(Entity<MicrowaveComponent?> microwave)
    {
        return MicrowaveQuery.Resolve(microwave.Owner, ref microwave.Comp)
            && ActiveMicrowaveQuery.HasComp(microwave.Owner);
    }

    /// <summary>
    /// Helper function to get the contents of a microwave.
    /// </summary>
    /// <param name="microwave">The microwave entity.</param>
    /// <returns>A list of microwave contents.</returns>
    [PublicAPI]
    public IReadOnlyList<EntityUid> GetMicrowaveContents(Entity<MicrowaveComponent?> microwave)
    {
        if (!MicrowaveQuery.Resolve(microwave.Owner, ref microwave.Comp))
            return new List<EntityUid>();

        return microwave.Comp.Storage.ContainedEntities;
    }

    /// <summary>
    /// Helper function to check if a microwave has ingredient contents.
    /// </summary>
    /// <param name="microwave">The microwave entity.</param>
    /// <returns>Whether or not this microwave contains anything.</returns>
    [PublicAPI]
    public bool HasContents(Entity<MicrowaveComponent?> microwave)
    {
        return GetMicrowaveContents(microwave).Any();
    }

    /// <summary>
    /// Gets a complete ordered list of usable recipes for this appliance.
    /// </summary>
    /// <remarks>
    /// Note that the order of recipes is meaningful. When a valid recipe is chosen, the first item
    /// in the list that satisfies the conditions of the recipe is selected.
    ///
    /// Recipe prototypes in the recipe manager are pre-sorted based on complexity, so more "specific"
    /// recipes will be selected first. Secret recipes come before all non-secret prototype recipes.
    /// Do not sort the result of this function!
    /// </remarks>
    /// <param name="uid">The appliance to get recipes for.</param>
    /// <returns>A complete list of usable recipe prototypes.</returns>
    [PublicAPI]
    public IReadOnlyList<MicrowaveMealRecipePrototype> GetAvailableRecipes(EntityUid uid)
    {
        var getRecipesEv = new GetSecretRecipesEvent();
        RaiseLocalEvent(uid, ref getRecipesEv);

        var recipes = getRecipesEv.Recipes
            .OrderByDescending(recipe => recipe.Priority)
            .ThenByDescending(recipe => recipe.Ingredients.Count())
            .ToList();
        recipes.AddRange(_recipes.Recipes);

        return recipes;
    }

    /// <summary>
    /// Given a recipe, a list of available ingredients, and a cooking time, this functions
    /// gets how many times we can make this given recipe.
    /// </summary>
    /// <param name="recipe">A cooking recipe.</param>
    /// <param name="ingredients">The ingredients we have available.</param>
    /// <param name="cookTime">How long we are cooking for.</param>
    /// <returns>How many portions of the recipe can be made.</returns>
    [PublicAPI]
    public static uint GetRecipePortions(MicrowaveMealRecipePrototype recipe,
        CookingIngredients ingredients,
        uint cookTime)
    {
        // Our cooking time must be a multiple of the recipe's cooking time.
        // For example: If a recipe takes 10 seconds to cook, then you can't make it with a 15 second timer.
        // However, if you use a 30 second timer, you could make three of that recipe on one timer.
        if (cookTime % recipe.Time != 0)
            return 0;

        // TODO: there's actually a kind of nasty edge case microwave economics issue here,
        // all reagents / stacks / solids will be included, but when the recipe is actually made,
        // solids are used first, then stacks, then reagents.
        // thus, recipe detection might thing you have "more" ingredients than you actually do.
        //
        // moral of the story: I hate microwaves
        var portionCount = cookTime / recipe.Time;
        var ingredientPortions = ingredients.PortionForRecipe(recipe.Ingredients);
        portionCount = Math.Min(portionCount, ingredientPortions);

        return portionCount;
    }

    /// <summary>
    /// Given an appliance entity and a list of available ingredients, this function gets the first valid
    /// usable recipe for cooking.
    /// </summary>
    /// <remarks>
    /// The appliance entity itself is used to get secret recipes.
    /// </remarks>
    /// <param name="uid">An appliance to fetch a recipe for.</param>
    /// <param name="ingredients">A list of available ingredients.</param>
    /// <param name="cookTime">How long we plan to cook for.</param>
    /// <returns>
    /// The first valid recipe we can use. If there is none, this is (null, 0).
    /// </returns>
    [PublicAPI]
    public PortionedRecipe? GetRecipe(EntityUid uid,
        CookingIngredients ingredients,
        uint cookTime)
    {
        var recipes = GetAvailableRecipes(uid);
        var recipePortions = recipes.Select(recipe =>
            {
                var portions = GetRecipePortions(recipe, ingredients, cookTime);
                return new PortionedRecipe(recipe.ID, portions);
            });

        return recipePortions.FirstOrNull(r => r.Count > 0)
            ?? null;
    }

    /// <summary>
    /// Gets a complete list of recipe-usable ingredients from a list of items, including solids,
    /// stacks, and reagents.
    /// </summary>
    /// <param name="items">The list of items to use as ingredients.</param>
    /// <returns>Cooking ingredient quantities representing the total usable ingredient list.</returns>
    [PublicAPI]
    public CookingIngredients GetTotalIngredients(List<EntityUid> items)
    {
        var ingredients = new CookingIngredients();

        foreach (var item in items)
        {
            AddItemIngredients(item, ref ingredients);
        }

        return ingredients;
    }
}