let state = 0;
let data = {};

let addIngredients = document.querySelector("#addIngredients");
let newIngredients = document.querySelector("#newIngredients");
let createRecipes = document.querySelector("#createRecipes");
let existingIngredientElements = [];
let newIngredientElements = [];
let recipeData = [];
let recipeDataIndex = 0;

for(let recipe of recipes.elements){
    recipeData.push(
        {
            id: recipe.id,
            name: recipe.name,
            ingredients: []
        }
    )
}

let updateState = (num)=>{
    state += num;
    if(state === 0){
        addIngredients.style.display = "flex";
        newIngredients.style.display = "none";
        createRecipes.style.display = "none";
    }else if(state === 1){
        addIngredients.style.display = "none";
        newIngredients.style.display = "flex";
        createRecipes.style.display = "none";
    }else if(state === 2){
        // addIngredients.style.display = "none";
        // newIngredients.style.display = "none";
        // createRecipes.style.display = "flex";
        createIngredientsList();
    }
}

//Ingredient functions
let populateIngredients = ()=>{
    let tBody = document.createElement("tbody");

    for(let ingredient of ingredients){
        let row = document.createElement("tr");
        row.id = ingredient._id;
    
        let add = document.createElement("td");
        let checkbox = document.createElement("input");
        checkbox.type = "checkbox";
        add.appendChild(checkbox);
        row.appendChild(add);
    
        let name = document.createElement("td");
        name.innerText = ingredient.name;
        row.appendChild(name);
    
        let category = document.createElement("td");
        category.innerText = ingredient.category;
        row.appendChild(category);
    
        let quantity = document.createElement("td");
        let quantityInput = document.createElement("input");
        quantityInput.type = "number";
        quantityInput.step = "0.01";
        quantityInput.min = "0";

        quantity.appendChild(quantityInput);
        row.appendChild(quantity);
        let unit = document.createElement("td");
        unit.innerText = ingredient.unitType;
        row.appendChild(unit);
    
        let idField = document.createElement("input");
        idField.type = "hidden";
        idField.value = ingredient._id;
    
        tBody.appendChild(row);
        let oldTBody = document.querySelector("#ingredient-display tbody");
        oldTBody.parentNode.replaceChild(tBody, oldTBody);
        existingIngredientElements.push(row);
    }
}

let newIngredientField = ()=>{
    let body = document.querySelector("#inputField tbody");
    let row = document.createElement("tr");

    let name = document.createElement("td");
    let nameInput = document.createElement("input");
    nameInput.type = "text";
    nameInput.onblur = ()=>{checkValid("name", nameInput)};
    name.appendChild(nameInput);
    row.appendChild(name);

    let category = document.createElement("td");
    let categoryInput = document.createElement("input");
    categoryInput.type = "text"
    categoryInput.onblur = ()=>{checkValid("category", categoryInput)};
    category.appendChild(categoryInput);
    row.appendChild(category);

    let quantity = document.createElement("td");
    let quantityInput = document.createElement("input");
    quantityInput.type = "number";
    quantityInput.step = "0.01";
    quantityInput.onblur = ()=>{checkValid("quantity", quantityInput)};
    quantity.appendChild(quantityInput);
    row.appendChild(quantity);

    let unit = document.createElement("td");
    let unitInput = document.createElement("input");
    unitInput.type = "text";
    unitInput.onblur = ()=>{checkValid("unit", unitInput)};
    unit.appendChild(unitInput);
    row.appendChild(unit);

    let removeTd = document.createElement("td");
    let removeButton = document.createElement("button");
    removeButton.innerText = "-";
    removeButton.onclick = ()=>{removeRow(row)};
    removeTd.appendChild(removeButton);
    row.appendChild(removeTd);

    body.appendChild(row);
    newIngredientElements.push(row);
}

let removeRow = (row)=>{
    for(let i = 0; i < newIngredientElements.length; i++){
        if(newIngredientElements[i] === row){
            newIngredientElements.splice(i, 1);
        }
    }
    row.parentNode.removeChild(row);
}

let createIngredientsList = ()=>{
    data.ingredients = [];
    for(let ingredient of existingIngredientElements){
        if(ingredient.children[0].children[0].checked){
            data.ingredients.push({
                id: ingredient.id,
                name: ingredient.children[1].textContent,
                quantity: ingredient.children[3].children[0].value,
                unitType: ingredient.children[4].textContent
            });
        }
    }

    let newIngredient = [];
    let newIngredientQuantity = [];
    for(let ingredient of newIngredientElements){
        newIngredient.push({
            name: ingredient.children[0].children[0].value,
            category: ingredient.children[1].children[0].value,
            unitType: ingredient.children[3].children[0].value
        });
        newIngredientQuantity.push({
            name: ingredient.children[0].children[0].value,
            quantity: ingredient.children[2].children[0].value
        });
    }

    let isValid = true;
    for(let i = 0; i < newIngredient.length; i++){
        if(!validator.ingredient.all(newIngredient[i], newIngredientQuantity[i].quantity)){
            isValid = false;
            data.ingredients = [];
            break;
        }
    }

    if(isValid){
        axios.post("/ingredients/create", newIngredient)
            .then((result)=>{
                for(let ingredient of result.data){
                    let newIngredient = {
                        id: ingredient._id,
                        name: ingredient.name,
                        unitType: ingredient.unitType
                    }

                    for(let item of newIngredientQuantity){
                        if(ingredient.name === item.name){
                            newIngredient.quantity = item.quantity;
                        }
                    }

                    data.ingredients.push(newIngredient);
                }
                banner.createNotification("All ingredients have been created and added to your inventory");
                showRecipe();
            })
            .catch((err)=>{
                banner.createError("There has been an error and your ingredients have not been saved");
                console.log(err);
            });
    }
}

//Recipe functions
let showRecipe = ()=>{
    let title = document.querySelector("#recipeName");
    title.innerText = recipeData[recipeDataIndex].name;

    let body = document.querySelector("#recipes tbody");
    for(let ing of recipeData[recipeDataIndex].ingredients){
        let row = document.createElement("tr");
        body.appendChild(row);

        let ingTd = document.createElement("td");
        row.appendChild(ingTd);
        let ingName = document.createElement("select");
        for(let ingredient of data.ingredients){
            let newOption = document.createElement("option");
            newOption.innerText = ingredient.name;
            newOption.value = ingredient.id;
            if(ingredient.id === ing.id){
                newOption.selected = "selected";
            }
            ingName.appendChild(newOption);
        }
        ingTd.appendChild(ingName);

        let quantTd = document.createElement("td");
        row.appendChild(quantTd);
        let ingQuant = document.createElement("input");
        ingQuant.type = "number";
        ingQuant.step = "0.01";
        ingQuant.value = ing.quantity;
        quantTd.appendChild(ingQuant);
    }

    let nextButton = document.querySelector("#next");
    if(recipeDataIndex === recipeData.length - 1){
        nextButton.innerText = "Finish";
        nextButton.onclick = submitAll;
    }else{
        nextButton.innerText = "Next Recipe";
        nextButton.onclick = ()=>{changeRecipe(1)};
    }

    let previousButton = document.querySelector("#previous");
    if(recipeDataIndex === 0){
        previousButton.style.display = "none";
    }else{
        previousButton.style.display = "inline-block";
    }
}

let addRecipeIngredientField = ()=>{
    let body = document.querySelector("#recipes tbody");

    let row = document.createElement("tr");
    body.appendChild(row);

    let ingTd = document.createElement("td");
    row.appendChild(ingTd);
    let ingName = document.createElement("select");
    for(let ingredient of data.ingredients){
        let newOption = document.createElement("option");
        newOption.innerText = ingredient.name;
        newOption.value = ingredient.id;
        ingName.appendChild(newOption);
    }
    ingTd.appendChild(ingName);

    let quantTd = document.createElement("td");
    row.appendChild(quantTd);
    let ingQuant = document.createElement("input");
    ingQuant.type = "number";
    ingQuant.step = "0.01";
    ingQuant.min = "0";
    quantTd.appendChild(ingQuant);

    let removeTd = document.createElement("td");
    row.appendChild(removeTd);
    let removeButton = document.createElement("button");
    removeButton.innerText = "-";
    removeButton.onclick = ()=>{row.parentNode.removeChild(row)};
    removeTd.appendChild(removeButton);
}

let changeRecipe = (num)=>{
    let body = document.querySelector("#recipes tbody");

    let recipeIngredients = [];
    while(body.children.length > 0){
        let row = body.firstChild;
        recipeIngredients.push({
            id: row.children[0].children[0].value,
            quantity: row.children[1].children[0].value
        });
        recipeData[recipeDataIndex].ingredients = recipeIngredients;

        body.removeChild(row);
    }
    recipeDataIndex += num;
    showRecipe();
}

let submitAll = ()=>{
    let body = document.querySelector("#recipes tbody");
    data.recipes = [];

    let recipeIngredients = [];
    while(body.children.length > 0){
        let row = body.firstChild;
        recipeIngredients.push({
            id: row.children[0].children[0].value,
            quantity: row.children[1].children[0].value
        });
        recipeData[recipeDataIndex].ingredients = recipeIngredients;

        body.removeChild(row);
    }

    for(let recipe of recipeData){
        let newRecipe = {
            cloverId: recipe.id,
            name: recipe.name,
            ingredients: []
        };
        for(let ingredient of recipe.ingredients){
            newRecipe.ingredients.push({
                id: ingredient.id,
                quantity: ingredient.quantity
            });
        }
        data.recipes.push(newRecipe);
    }
    

    let form = document.createElement("form");
    form.method = "post";
    form.action = "/merchant/create"
    
    let dataInput = document.createElement("input");
    dataInput.type = "hidden";
    dataInput.name = "data";
    dataInput.value = JSON.stringify(data);

    form.appendChild(dataInput);
    document.body.appendChild(form);
    form.submit();
}

let checkValid = (valueToCheck, inputField)=>{
    console.log(inputField.value);
    if(!validator.ingredient[valueToCheck](inputField.value, createBanner = false)){
        inputField.classList += " input-error"
    }else{
        inputField.classList.remove("input-error");
    }
}

populateIngredients();
updateState(0);