const Order = require("./Order");

module.exports = {
    isFetched: false,

    display: async function(Order){
        if(!this.isFetched){
            let loader = document.getElementById("loaderContainer");
            loader.style.display = "flex";

            fetch("/order", {
                method: "GET",
                headers: {
                    "Content-Type": "application/json;charset=utf-8"
                },
            })
                .then((response) => response.json())
                .then((response)=>{
                    if(typeof(response) === "string"){
                        banner.createError(response);
                    }else{
                        let newOrders = [];
                        for(let i = 0; i < response.length; i++){
                            newOrders.push(new Order(
                                response[i]._id,
                                response[i].name,
                                response[i].date,
                                response[i].ingredients,
                                merchant
                            ));
                        }
                        merchant.editOrders(newOrders);

                        document.getElementById("orderSubmitForm").onsubmit = ()=>{this.submitFilter(Order)};

                        this.isFetched = true;
                    }
                })
                .catch((err)=>{
                    banner.createError("SOMETHING WENT WRONG. TRY REFRESHING THE PAGE");
                })
                .finally(()=>{
                    loader.style.display = "none";
                });
        }
    },

    populate: function(){
        let listDiv = document.getElementById("orderList");
        let template = document.getElementById("order").content.children[0];
        let dateDropdown = document.getElementById("dateDropdownOrder");
        let ingredientDropdown = document.getElementById("ingredientDropdown");

        dateDropdown.style.display = "none";
        ingredientDropdown.style.display = "none";

        document.getElementById("dateFilterBtnOrder").onclick = ()=>{this.toggleDropdown(dateDropdown)};
        document.getElementById("ingredientFilterBtn").onclick = ()=>{this.toggleDropdown(ingredientDropdown)};

        for(let i = 0; i < merchant.ingredients.length; i++){
            let checkbox = document.createElement("input");
            checkbox.type = "checkbox";
            checkbox.ingredient = merchant.ingredients[i].ingredient;
            ingredientDropdown.appendChild(checkbox);

            let label = document.createElement("label");
            label.innerText = merchant.ingredients[i].ingredient.name;
            label.for = checkbox;
            ingredientDropdown.appendChild(label);

            let brk = document.createElement("br");
            ingredientDropdown.appendChild(brk);
        }

        while(listDiv.children.length > 0){
            listDiv.removeChild(listDiv.firstChild);
        }

        for(let i = 0; i < merchant.orders.length; i++){
            let row = template.cloneNode(true);
            let totalCost = 0;
            
            for(let j = 0; j < merchant.orders[i].ingredients.length; j++){
                totalCost += merchant.orders[i].ingredients[j].quantity * merchant.orders[i].ingredients[j].price;
            }

            row.children[0].innerText = merchant.orders[i].name;
            row.children[1].innerText = `${merchant.orders[i].ingredients.length} items`;
            row.children[2].innerText = new Date(merchant.orders[i].date).toLocaleDateString("en-US");
            row.children[3].innerText = `$${(totalCost / 100).toFixed(2)}`;
            row.order = merchant.orders[i];
            row.onclick = ()=>{controller.openSidebar("orderDetails", merchant.orders[i])};
            listDiv.appendChild(row);
        }
    },

    submitFilter: function(){
        event.preventDefault();

        let data = {
            startDate: document.getElementById("orderFilDate1").valueAsDate,
            endDate: document.getElementById("orderFilDate2").valueAsDate,
            ingredients: []
        }

        if(data.startDate >= data.endDate){
            banner.createError("START DATE CANNOT BE AFTER END DATE");
            return;
        }

        let ingredientChoices = document.getElementById("ingredientDropdown");
        for(let i = 0; i < ingredientChoices.children.length; i += 3){
            if(ingredientChoices.children[i].checked){
                data.ingredients.push(ingredientChoices.children[i].ingredient.id);
            }
        }

        if(data.ingredients.length === 0){
            for(let i = 0; i < merchant.ingredients.length; i++){
                data.ingredients.push(merchant.ingredients[i].ingredient.id);
            }
        }

        let loader = document.getElementById("loaderContainer");
        loader.style.display = "flex";

        fetch("/order", {
            method: "POST",
            headers: {
                "Content-Type": "application/json;charset=utf-8"
            },
            body: JSON.stringify(data)
        })
            .then((response) => response.json())
            .then((response)=>{
                if(typeof(response) === "string"){
                    banner.createError(response);
                }else{
                    let orderList = document.getElementById("orderList");
                    let template = document.getElementById("order").content.children[0];

                    while(orderList.children.length > 0){
                        orderList.removeChild(orderList.firstChild);
                    }

                    for(let i = 0; i < response.length; i++){
                        let orderDiv = template.cloneNode(true);
                        let order = new Order(
                            response[i]._id,
                            response[i].name,
                            response[i].date,
                            response[i].ingredients,
                            merchant
                        );

                        let cost = 0;
                        for(let j = 0; j < order.ingredients.length; j++){
                            cost += (order.ingredients[j].price / 100) * order.ingredients[j].quantity;
                        }

                        orderDiv.children[0].innerText = order.name;
                        orderDiv.children[1].innerText = `${order.ingredients.length} items`;
                        orderDiv.children[2].innerText = order.date.toLocaleDateString();
                        orderDiv.children[3].innerText = `$${cost.toFixed(2)}`;
                        orderDiv.onclick = ()=>{controller.openSidebar("orderDetails", order)};
                        orderList.appendChild(orderDiv);
                    }
                }
            })
            .catch((err)=>{
                banner.createError("UNABLE TO DISPLAY THE ORDERS");
            })
            .finally(()=>{
                loader.style.display = "none";
            });
    },

    toggleDropdown: function(dropdown){
        event.preventDefault();
        let polyline = dropdown.parentElement.children[0].children[1].children[0].children[0];

        if(dropdown.style.display === "none"){
            dropdown.style.display = "block";
            polyline.setAttribute("points", "18 15 12 9 6 15");
        }else{
            dropdown.style.display = "none";
            polyline.setAttribute("points", "6 9 12 15 18 9");
        }
    }
}