const BASE_URL = window.location.href.replace(/^(http:\/\/[^/:]+).*/, "$1:8000")    

function fixMealDates(meals) {
    for (const meal of meals) {
        meal.meal_date = new Date(meal.meal_date);
    }
}

let user = null;
export default {
    async getMeals(from, to) {
        const response = await fetch(BASE_URL + "/meals?from=" + from.toISOString() + "&to=" + to.toISOString());
        const meals = await response.json();
        fixMealDates(meals);

        return meals.sort((a, b) => a.meal_date - b.meal_date);
    },
    async getMeal(id) {
        var response = await fetch(BASE_URL + `/meals/${encodeURIComponent(id)}`);
        return await response.json();
    },
    async deleteMeal(id) {
        var response = await fetch(BASE_URL + `/meals/${encodeURIComponent(id)}`, {
            method: "DELETE",
        });
        return await response.json();
    },
    async searchRecipes(query) {
        const response = await fetch(BASE_URL + "/recipes?q=" + encodeURIComponent(query));
        return await response.json();
    },
    async parseRecipe(url) {
        const response = await fetch(BASE_URL + `/recipes/parse?url=${encodeURIComponent(url)}`);
        return await response.json();
    },
    async getRecipe(id) {
        const response = await fetch(BASE_URL + `/recipes/${encodeURIComponent(id)}`);
        return await response.json();
    },
    async parseProduct(ingredient, url) {
        const body = {
            url, tags: [ingredient.name, ingredient.line],
        };

        const response = await fetch(BASE_URL + "/products", {
            method: "POST",
            credentials: "include",
            headers: {
                "Content-Type": "application/json"
            },
            body: JSON.stringify(body),
        });

        return await response.json();
    },
    async parseIngredients(lines) {
        const params = lines.map(line => "ingredients=" + encodeURIComponent(line)).join("&");
        const response = await fetch(BASE_URL + "/recipes/ingredients/parse?" + params);
        return await response.json();
    },
    async saveRecipe(recipe) {
        const response = await fetch(BASE_URL + "/recipes", {
            method: "POST",
            credentials: "include",
            headers: {
                "Content-Type": "application/json"
            },
            body: JSON.stringify(recipe),
        });

        return await response.json();
    },
    async saveMeal(meal) {
        if (meal.id) {
            const response = await fetch(BASE_URL + `/meals/${encodeURIComponent(meal.id)}`, {
                method: "PUT",
                credentials: "include",
                headers: {
                    "Content-Type": "application/json"
                },
                body: JSON.stringify(meal),
            });
            return await response.json();
        }
        
        const response = await fetch(BASE_URL + "/meals", {
            method: "POST",
            credentials: "include",
            headers: {
                "Content-Type": "application/json"
            },
            body: JSON.stringify(meal),
        });
        
        return await response.json();
    },
    async currentUser() {
        if (user) {
            return user;
        }
        
        var cookie = decodeURIComponent(document.cookie).split(";").find(cookie => cookie.trimStart().startsWith("user_id="));
        if (cookie) {
            const response = await fetch(BASE_URL + "/auth/refresh", {
                method: "POST",
                credentials: "include",
            });

            if (response.ok) {
                user = await response.json();
            }
        }

        return user;
    },
    async login(username) {
        const response = await fetch(BASE_URL + "/auth/login", {
            method: "POST",
            credentials: "include",
            headers: {
                "Content-Type": "application/json"
            },
            body: JSON.stringify({ username }),
        });

        if (response.ok) {
            user = await response.json();
        }

        return user;
    },
    async deleteRecipe(id) {
        var response = await fetch(BASE_URL + `/recipes/${encodeURIComponent(id)}`, {
            method: "DELETE",
            credentials: "include",
        });
        return await response.json();
    },
    async searchPerson(name) {
        const response = await fetch(BASE_URL + "/persons?q=" + encodeURIComponent(name));
        return await response.json();
    },
    async getMyShoppingList() {
        const response = await fetch(BASE_URL + "/shopping/current/me/ingredients", { credentials: "include" });
        return await response.json();
    },
    async saveMyShoppingList(list) {
        const response = await fetch(BASE_URL + "/shopping/current/me/ingredients", {
            method: "POST",
            credentials: "include",
            headers: {
                "Content-Type": "application/json"
            },
            body: JSON.stringify(list),
        });

        return await response.json();
    },
    async getShoppingList(id) {
        const response = await fetch(BASE_URL + `/shopping/${encodeURIComponent(id)}`);
        return await response.json();
    },
    async getCurrentShoppingList() {
        const response = await fetch(BASE_URL + "/shopping/current");
        const lst = await response.json();
        fixMealDates(lst.requests.map(request => request.meal).filter(meal => meal));
        return lst;
    },
    async requestMeal(meal_id) {
        const response = await fetch(BASE_URL + `/shopping/current/meals/me`, {
            method: "POST",
            credentials: "include",
            headers: {
                "Content-Type": "application/json"
            },
            body: JSON.stringify({ meal_id }),
        });

        const result = await response.json();
        fixMealDates([result.meal]);
        return result;
    },
    async unrequestMeal(meal_id) {
        const response = await fetch(BASE_URL + `/shopping/current/meals/${encodeURIComponent(meal_id)}`, {
            method: "DELETE",
            credentials: "include",
        });

        return await response.json();
    },
    async markFound(ingredients) {
        const response = await fetch(BASE_URL + "/shopping/current/found", {
            method: "POST",
            credentials: "include",
            headers: {
                "Content-Type": "application/json"
            },
            body: JSON.stringify(ingredients),
        });

        return await response.json();
    },
    async markNotFound(product_id) {
        const response = await fetch(BASE_URL + `/shopping/current/found/${product_id}`, {
            method: "DELETE",
            credentials: "include",
        });

        return await response.json();
    }
}