import {hasClosestBlock, hasClosestByAttribute} from "../util/hasClosest";
import {Constants} from "../../constants";

export const getPreviousBlock = (element: Element) => {
    let parentElement = element;
    while (parentElement) {
        if (parentElement.previousElementSibling && parentElement.previousElementSibling.getAttribute("data-node-id")) {
            return parentElement.previousElementSibling;
        }
        const pElement = hasClosestBlock(parentElement.parentElement);
        if (pElement) {
            parentElement = pElement;
        } else {
            return false;
        }
    }
};

export const getLastBlock = (element: Element) => {
    let lastElement;
    Array.from(element.querySelectorAll("[data-node-id]")).reverse().find(item => {
        if (!hasClosestByAttribute(item.parentElement, "data-type", "NodeBlockQueryEmbed")) {
            lastElement = item;
            return true;
        }
    });
    return lastElement || element;
};

export const getFirstBlock = (element: Element) => {
    let firstElement;
    Array.from(element.querySelectorAll("[data-node-id]")).find(item => {
        if (!hasClosestByAttribute(item.parentElement, "data-type", "NodeBlockQueryEmbed") &&
            !item.classList.contains("li") && !item.classList.contains("sb")) {
            firstElement = item;
            return true;
        }
    });
    return firstElement || element;
};

export const getNextBlock = (element: Element) => {
    let parentElement = element;
    while (parentElement) {
        if (parentElement.nextElementSibling && !parentElement.nextElementSibling.classList.contains("protyle-attr")) {
            return parentElement.nextElementSibling as HTMLElement;
        }
        const pElement = hasClosestBlock(parentElement.parentElement);
        if (pElement) {
            parentElement = pElement;
        } else {
            return false;
        }
    }
    return false;
};

export const getNoContainerElement = (element: Element) => {
    let childElement = element;
    while (childElement) {
        if (childElement.classList.contains("list") || childElement.classList.contains("li") || childElement.classList.contains("bq") || childElement.classList.contains("sb")) {
            childElement = childElement.querySelector("[data-node-id]");
        } else {
            return childElement;
        }
    }
    return false;
};

export const getContenteditableElement = (element: Element) => {
    if (!element || (element.getAttribute("contenteditable") === "true") && !element.classList.contains("protyle-wysiwyg")) {
        return element;
    }
    return element.querySelector('[contenteditable="true"]');
};

export const isNotEditBlock = (element: Element) => {
    return ["NodeBlockQueryEmbed", "NodeThematicBreak", "NodeMathBlock", "NodeHTMLBlock", "NodeIFrame", "NodeWidget", "NodeVideo", "NodeAudio"].includes(element.getAttribute("data-type")) ||
        (element.getAttribute("data-type") === "NodeCodeBlock" && element.classList.contains("render-node"));
};

export const getTopEmptyElement = (element: Element) => {
    let topElement = element;
    while (topElement.parentElement && !topElement.parentElement.classList.contains("protyle-wysiwyg")) {
        if (!topElement.parentElement.getAttribute("data-node-id")) {
            topElement = topElement.parentElement;
        } else {
            let hasText = false;
            Array.from(topElement.parentElement.querySelectorAll('[contenteditable="true"]')).find(item => {
                if (item.textContent.replace(Constants.ZWSP, "").replace("\n", "") !== "") {
                    hasText = true;
                    return true;
                }
            });
            if (hasText || topElement.previousElementSibling?.getAttribute("data-node-id") ||
                topElement.nextElementSibling?.getAttribute("data-node-id")) {
                break;
            } else {
                topElement = topElement.parentElement;
            }
        }
    }
    return topElement;
};

export const getTopAloneElement = (topSourceElement: Element) => {
    if ("NodeBlockquote" === topSourceElement.parentElement.getAttribute("data-type") && topSourceElement.parentElement.childElementCount === 2) {
        while (!topSourceElement.parentElement.classList.contains("protyle-wysiwyg")) {
            if (topSourceElement.parentElement.getAttribute("data-type") === "NodeBlockquote" && topSourceElement.parentElement.childElementCount === 2) {
                topSourceElement = topSourceElement.parentElement;
            } else {
                topSourceElement = getTopAloneElement(topSourceElement);
                break;
            }
        }
    } else if ("NodeSuperBlock" === topSourceElement.parentElement.getAttribute("data-type") && topSourceElement.parentElement.childElementCount === 2) {
        while (!topSourceElement.parentElement.classList.contains("protyle-wysiwyg")) {
            if (topSourceElement.parentElement.getAttribute("data-type") === "NodeSuperBlock" && topSourceElement.parentElement.childElementCount === 2) {
                topSourceElement = topSourceElement.parentElement;
            } else {
                topSourceElement = getTopAloneElement(topSourceElement);
                break;
            }
        }
    } else if ("NodeListItem" === topSourceElement.parentElement.getAttribute("data-type") && topSourceElement.parentElement.childElementCount === 3) {
        while (!topSourceElement.parentElement.classList.contains("protyle-wysiwyg")) {
            if (topSourceElement.parentElement.getAttribute("data-type") === "NodeListItem" && topSourceElement.parentElement.childElementCount === 3) {
                topSourceElement = topSourceElement.parentElement;
            } else if (topSourceElement.parentElement.getAttribute("data-type") === "NodeList" && topSourceElement.parentElement.childElementCount === 2) {
                topSourceElement = topSourceElement.parentElement;
            } else {
                topSourceElement = getTopAloneElement(topSourceElement);
                break;
            }
        }
    } else if ("NodeList" === topSourceElement.parentElement.getAttribute("data-type") && topSourceElement.parentElement.childElementCount === 2) {
        while (!topSourceElement.parentElement.classList.contains("protyle-wysiwyg")) {
            if ("NodeList" === topSourceElement.parentElement.getAttribute("data-type") && topSourceElement.parentElement.childElementCount === 2) {
                topSourceElement = topSourceElement.parentElement;
            } else if (topSourceElement.parentElement.getAttribute("data-type") === "NodeListItem" && topSourceElement.parentElement.childElementCount === 3) {
                topSourceElement = topSourceElement.parentElement;
            } else {
                topSourceElement = getTopAloneElement(topSourceElement);
                break;
            }
        }
    }
    return topSourceElement;
};

export const hasNextSibling = (element: Node) => {
    let nextSibling = element.nextSibling;
    while (nextSibling) {
        if (nextSibling.textContent === "" && nextSibling.nodeType === 3) {
            nextSibling = nextSibling.nextSibling;
        } else {
            return nextSibling;
        }
    }
    return false;
};

export const hasPreviousSibling = (element: Node) => {
    let previousSibling = element.previousSibling;
    while (previousSibling) {
        if (previousSibling.textContent === "" && previousSibling.nodeType === 3) {
            previousSibling = previousSibling.previousSibling;
        } else {
            return previousSibling;
        }
    }
    return false;
};

export const getNextFileLi = (current: Element) => {
    let nextElement = current.nextElementSibling;
    if (nextElement) {
        if (nextElement.tagName === "LI") {
            return nextElement;
        } else if (nextElement.tagName === "UL") {
            return nextElement.firstElementChild;
        }
        return false;
    }
    nextElement = current.parentElement;
    while (nextElement.tagName === "UL") {
        if (!nextElement.nextElementSibling) {
            nextElement = nextElement.parentElement;
        } else if (nextElement.nextElementSibling.tagName === "LI") {
            return nextElement.nextElementSibling;
        } else if (nextElement.nextElementSibling.tagName === "UL") {
            return nextElement.nextElementSibling.firstElementChild;
        }
    }
    return false;
};

export const getPreviousFileLi = (current: Element) => {
    let previousElement = current.previousElementSibling;
    if (previousElement) {
        if (previousElement.tagName === "LI") {
            return previousElement;
        } else if (previousElement.tagName === "UL") {
            return previousElement.lastElementChild;
        }
        return false;
    }
    previousElement = current.parentElement;
    while (previousElement.tagName === "UL") {
        if (!previousElement.previousElementSibling) {
            previousElement = previousElement.parentElement;
        } else if (previousElement.previousElementSibling.tagName === "LI") {
            return previousElement.previousElementSibling;
        } else if (previousElement.previousElementSibling.tagName === "UL") {
            const liElements = previousElement.previousElementSibling.querySelectorAll(".b3-list-item");
            return liElements[liElements.length - 1];
        }
    }
    return false;
};