import {setEditMode} from "../util/setEditMode";
import {scrollEvent} from "../scroll/event";
import {isMobile} from "../../util/functions";
import {Constants} from "../../constants";
import {isMac} from "../util/compatibility";
import {setInlineStyle} from "../../util/assets";
import {fetchPost} from "../../util/fetch";
import {lineNumberRender} from "../render/highlightRender";
import {hideMessage, showMessage} from "../../dialog/message";
import {genUUID} from "../../util/genID";
import {getContenteditableElement, getLastBlock} from "../wysiwyg/getBlock";
import {genEmptyElement, genHeadingElement} from "../../block/util";
import {transaction} from "../wysiwyg/transaction";
import {focusByRange} from "../util/selection";
/// #if !MOBILE
import {moveResize} from "../../dialog/moveResize";
/// #endif
import {
    hasClosestBlock,
    hasClosestByAttribute,
    hasClosestByClassName,
    hasClosestByTag,
    isInEmbedBlock
} from "../util/hasClosest";

export const initUI = (protyle: IProtyle) => {
    protyle.contentElement = document.createElement("div");
    protyle.contentElement.className = "protyle-content";

    if (protyle.options.render.background || protyle.options.render.title) {
        protyle.contentElement.innerHTML = '<div class="protyle-top"></div>';
        if (protyle.options.render.background) {
            protyle.contentElement.firstElementChild.appendChild(protyle.background.element);
        }
        if (protyle.options.render.title) {
            protyle.contentElement.firstElementChild.appendChild(protyle.title.element);
        }
    }

    protyle.contentElement.appendChild(protyle.wysiwyg.element);
    if (!protyle.options.action.includes(Constants.CB_GET_HISTORY)) {
        scrollEvent(protyle, protyle.contentElement);
    }
    protyle.element.append(protyle.contentElement);
    protyle.element.appendChild(protyle.preview.element);
    if (protyle.upload) {
        protyle.element.appendChild(protyle.upload.element);
    }
    if (protyle.options.render.scroll) {
        protyle.element.appendChild(protyle.scroll.element.parentElement);
    }
    if (protyle.gutter) {
        protyle.element.appendChild(protyle.gutter.element);
    }

    protyle.element.appendChild(protyle.hint.element);

    protyle.selectElement = document.createElement("div");
    protyle.selectElement.className = "protyle-select fn__none";
    protyle.element.appendChild(protyle.selectElement);

    protyle.element.appendChild(protyle.toolbar.element);
    protyle.element.appendChild(protyle.toolbar.subElement);
    /// #if !MOBILE
    moveResize(protyle.toolbar.subElement, () => {
        const pinElement = protyle.toolbar.subElement.querySelector('.block__icons [data-type="pin"]');
        if (pinElement) {
            pinElement.querySelector("svg use").setAttribute("xlink:href", "#iconUnpin");
            pinElement.setAttribute("aria-label", window.siyuan.languages.unpin);
            protyle.toolbar.subElement.firstElementChild.setAttribute("data-drag", "true");
        }
    });
    /// #endif

    protyle.element.append(protyle.highlight.styleElement);

    addLoading(protyle);

    setEditMode(protyle, protyle.options.mode);
    document.execCommand("DefaultParagraphSeparator", false, "p");

    let wheelTimeout: number;
    const wheelId = genUUID();
    const isMacOS = isMac();
    protyle.contentElement.addEventListener("mousewheel", (event: WheelEvent) => {
        if (!window.siyuan.config.editor.fontSizeScrollZoom || (isMacOS && !event.metaKey) || (!isMacOS && !event.ctrlKey) || event.deltaX !== 0) {
            return;
        }
        event.stopPropagation();
        if (event.deltaY < 0) {
            if (window.siyuan.config.editor.fontSize < 72) {
                window.siyuan.config.editor.fontSize++;
            } else {
                return;
            }
        } else if (event.deltaY > 0) {
            if (window.siyuan.config.editor.fontSize > 9) {
                window.siyuan.config.editor.fontSize--;
            } else {
                return;
            }
        }
        setInlineStyle();
        clearTimeout(wheelTimeout);
        showMessage(`${window.siyuan.languages.fontSize} ${window.siyuan.config.editor.fontSize}px<span class="fn__space"></span>
<button class="b3-button b3-button--white">${window.siyuan.languages.reset} 16px</button>`, undefined, undefined, wheelId);
        wheelTimeout = window.setTimeout(() => {
            fetchPost("/api/setting/setEditor", window.siyuan.config.editor);
            protyle.wysiwyg.element.querySelectorAll(".code-block .protyle-linenumber__rows").forEach((block: HTMLElement) => {
                lineNumberRender(block.parentElement);
            });
            document.querySelector(`#message [data-id="${wheelId}"] button`)?.addEventListener("click", () => {
                window.siyuan.config.editor.fontSize = 16;
                setInlineStyle();
                fetchPost("/api/setting/setEditor", window.siyuan.config.editor);
                hideMessage(wheelId);
                protyle.wysiwyg.element.querySelectorAll(".code-block .protyle-linenumber__rows").forEach((block: HTMLElement) => {
                    lineNumberRender(block.parentElement);
                });
            });
        }, Constants.TIMEOUT_LOAD);
    }, {passive: true});
    protyle.contentElement.addEventListener("click", (event: MouseEvent & { target: HTMLElement }) => {
        // wysiwyg 元素下方点击无效果 https://github.com/siyuan-note/siyuan/issues/12009
        if (protyle.disabled ||
            // 选中块时，禁止添加空块 https://github.com/siyuan-note/siyuan/issues/13905
            protyle.contentElement.querySelector(".protyle-wysiwyg--select") ||
            (!event.target.classList.contains("protyle-content") && !event.target.classList.contains("protyle-wysiwyg"))) {
            return;
        }
        // 选中最后一个块末尾点击底部时，range 会有值，需等待
        setTimeout(() => {
            // 选中文本禁止添加空块 https://github.com/siyuan-note/siyuan/issues/13905
            if (window.getSelection().rangeCount > 0) {
                const currentRange = window.getSelection().getRangeAt(0);
                if (currentRange.toString() !== "" && protyle.wysiwyg.element.contains(currentRange.startContainer)) {
                    return;
                }
            }
            const lastElement = protyle.wysiwyg.element.lastElementChild;
            const lastRect = lastElement.getBoundingClientRect();
            const range = document.createRange();
            if (event.y > lastRect.bottom) {
                const lastEditElement = getContenteditableElement(getLastBlock(lastElement));
                if (!protyle.options.click.preventInsetEmptyBlock && (
                    !lastEditElement ||
                    (lastElement.getAttribute("data-type") !== "NodeParagraph" && protyle.wysiwyg.element.getAttribute("data-doc-type") !== "NodeListItem") ||
                    (lastElement.getAttribute("data-type") === "NodeParagraph" && getContenteditableElement(lastEditElement).innerHTML !== ""))
                ) {
                    let emptyElement: Element;
                    if (lastElement.getAttribute("data-type") === "NodeHeading" && lastElement.getAttribute("fold") === "1") {
                        emptyElement = genHeadingElement(lastElement) as Element;
                    } else {
                        emptyElement = genEmptyElement(false, false);
                    }
                    protyle.wysiwyg.element.insertAdjacentElement("beforeend", emptyElement);
                    transaction(protyle, [{
                        action: "insert",
                        data: emptyElement.outerHTML,
                        id: emptyElement.getAttribute("data-node-id"),
                        previousID: emptyElement.previousElementSibling.getAttribute("data-node-id"),
                        parentID: protyle.block.parentID
                    }], [{
                        action: "delete",
                        id: emptyElement.getAttribute("data-node-id")
                    }]);
                    const emptyEditElement = getContenteditableElement(emptyElement) as HTMLInputElement;
                    range.selectNodeContents(emptyEditElement);
                    range.collapse(true);
                    focusByRange(range);
                    // 需等待 range 更新再次进行渲染
                    if (protyle.options.render.breadcrumb) {
                        setTimeout(() => {
                            protyle.breadcrumb.render(protyle);
                        }, Constants.TIMEOUT_TRANSITION);
                    }
                } else if (lastEditElement) {
                    range.selectNodeContents(lastEditElement);
                    range.collapse(false);
                    focusByRange(range);
                }
                protyle.toolbar.range = range;
            }
        });
    });
    let overAttr = false;
    protyle.element.addEventListener("mouseover", (event: KeyboardEvent & { target: HTMLElement }) => {
        // attr
        const attrElement = hasClosestByClassName(event.target, "protyle-attr");
        if (attrElement && !attrElement.parentElement.classList.contains("protyle-title")) {
            const hlElement = protyle.wysiwyg.element.querySelector(".protyle-wysiwyg--hl");
            if (hlElement) {
                hlElement.classList.remove("protyle-wysiwyg--hl");
            }
            overAttr = true;
            attrElement.parentElement.classList.add("protyle-wysiwyg--hl");
            return;
        } else if (overAttr) {
            const hlElement = protyle.wysiwyg.element.querySelector(".protyle-wysiwyg--hl");
            if (hlElement) {
                hlElement.classList.remove("protyle-wysiwyg--hl");
            }
            overAttr = false;
        }

        const nodeElement = hasClosestBlock(event.target);
        if (protyle.options.render.gutter && nodeElement) {
            if (nodeElement && (nodeElement.classList.contains("list") || nodeElement.classList.contains("li"))) {
                // 光标在列表下部应显示右侧的元素，而不是列表本身。放在 windowEvent 中的 mousemove 下处理
                return;
            }
            const embedElement = isInEmbedBlock(nodeElement);
            if (embedElement) {
                protyle.gutter.render(protyle, embedElement, protyle.wysiwyg.element);
                return;
            }
            protyle.gutter.render(protyle, nodeElement, protyle.wysiwyg.element, event.target);
            return;
        }

        // gutter
        const buttonElement = hasClosestByTag(event.target, "BUTTON");
        if (buttonElement && buttonElement.parentElement.classList.contains("protyle-gutters")) {
            const type = buttonElement.getAttribute("data-type");
            if (type === "fold" || type === "NodeAttributeViewRow") {
                Array.from(protyle.wysiwyg.element.querySelectorAll(".protyle-wysiwyg--hl, .av__row--hl")).forEach(item => {
                    item.classList.remove("protyle-wysiwyg--hl", "av__row--hl");
                });
                return;
            }
            Array.from(protyle.wysiwyg.element.querySelectorAll(`[data-node-id="${buttonElement.getAttribute("data-node-id")}"]`)).find(item => {
                if (!isInEmbedBlock(item) && protyle.gutter.isMatchNode(item)) {
                    const bodyQueryClass = (buttonElement.dataset.groupId && buttonElement.dataset.groupId !== "undefined") ? `.av__body[data-group-id="${buttonElement.dataset.groupId}"] ` : "";
                    const rowItem = item.querySelector(bodyQueryClass + `.av__row[data-id="${buttonElement.dataset.rowId}"]`);
                    Array.from(protyle.wysiwyg.element.querySelectorAll(".protyle-wysiwyg--hl, .av__row--hl")).forEach(hlItem => {
                        if (item !== hlItem) {
                            hlItem.classList.remove("protyle-wysiwyg--hl");
                        }
                        if (rowItem && rowItem !== hlItem) {
                            rowItem.classList.remove("av__row--hl");
                        }
                    });
                    if (type === "NodeAttributeViewRowMenu") {
                        rowItem.classList.add("av__row--hl");
                    } else {
                        item.classList.add("protyle-wysiwyg--hl");
                    }
                    return true;
                }
            });
            event.preventDefault();
            return;
        }

        // 面包屑
        /// #if !MOBILE
        if (protyle.selectElement.classList.contains("fn__none")) {
            const svgElement = hasClosestByAttribute(event.target, "data-node-id", null);
            if (svgElement && svgElement.parentElement.classList.contains("protyle-breadcrumb__bar")) {
                protyle.wysiwyg.element.querySelectorAll(".protyle-wysiwyg--hl").forEach(item => {
                    item.classList.remove("protyle-wysiwyg--hl");
                });
                const nodeElement = protyle.wysiwyg.element.querySelector(`[data-node-id="${svgElement.getAttribute("data-node-id")}"]`);
                if (nodeElement) {
                    nodeElement.classList.add("protyle-wysiwyg--hl");
                }
            }
        }
        /// #endif
    });
};

export const addLoading = (protyle: IProtyle, msg?: string) => {
    protyle.element.removeAttribute("data-loading");
    setTimeout(() => {
        if (protyle.element.getAttribute("data-loading") !== "finished") {
            protyle.element.insertAdjacentHTML("beforeend", `<div style="background-color: var(--b3-theme-background);flex-direction: column;" class="fn__loading wysiwygLoading">
    <img width="48px" src="/stage/loading-pure.svg">
    <div style="color: var(--b3-theme-on-surface);margin-top: 8px;">${msg || ""}</div>
</div>`);
        }
    }, Constants.TIMEOUT_LOAD);
};

export const removeLoading = (protyle: IProtyle) => {
    protyle.element.setAttribute("data-loading", "finished");
    protyle.element.querySelectorAll(".wysiwygLoading").forEach(item => {
        item.remove();
    });
};

export const setPadding = (protyle: IProtyle) => {
    if (protyle.options.action.includes(Constants.CB_GET_HISTORY)) {
        return {
            width: 0,
            padding: 0
        };
    }
    const padding = getPadding(protyle);
    const paddingLeft = padding.left;
    const paddingRight = padding.right;

    if (protyle.options.backlinkData) {
        protyle.wysiwyg.element.style.padding = `4px ${paddingRight}px 4px ${paddingLeft}px`;
    } else {
        protyle.wysiwyg.element.style.padding = `${padding.top}px ${paddingRight}px ${padding.bottom}px ${paddingLeft}px`;
    }
    if (protyle.options.render.background) {
        protyle.background.element.querySelector(".protyle-background__ia").setAttribute("style", `margin-left:${paddingLeft}px;margin-right:${paddingRight}px`);
    }
    if (protyle.options.render.title) {
        // pc 端 文档名 attr 过长和添加标签等按钮重合
        protyle.title.element.style.margin = `16px ${paddingRight}px 0 ${paddingLeft}px`;
    }

    // https://github.com/siyuan-note/siyuan/issues/15021
    protyle.element.style.setProperty("--b3-width-protyle", protyle.element.clientWidth + "px");
    protyle.element.style.setProperty("--b3-width-protyle-content", protyle.contentElement.clientWidth + "px");
    const realWidth = protyle.wysiwyg.element.getAttribute("data-realwidth");
    const newWidth = protyle.wysiwyg.element.clientWidth - paddingLeft - paddingRight;
    protyle.wysiwyg.element.setAttribute("data-realwidth", newWidth.toString());
    protyle.element.style.setProperty("--b3-width-protyle-wysiwyg", newWidth.toString() + "px");
    return {
        width: realWidth ? Math.abs(parseFloat(realWidth) - newWidth) : 0,
    };
};

export const getPadding = (protyle: IProtyle) => {
    let right = 16;
    let left = 24;
    let bottom = 16;
    if (protyle.options.typewriterMode) {
        if (isMobile()) {
            bottom = window.innerHeight / 5;
        } else {
            bottom = protyle.element.clientHeight / 2;
        }
    }
    if (!isMobile()) {
        let isFullWidth = protyle.wysiwyg.element.getAttribute(Constants.CUSTOM_SY_FULLWIDTH);
        if (!isFullWidth) {
            isFullWidth = window.siyuan.config.editor.fullWidth ? "true" : "false";
        }
        let padding = (protyle.element.clientWidth - Constants.SIZE_EDITOR_WIDTH) / 2;
        if (isFullWidth === "false" && padding > 96) {
            if (padding > Constants.SIZE_EDITOR_WIDTH) {
                // 超宽屏调整 https://ld246.com/article/1668266637363
                padding = protyle.element.clientWidth * .382 / 1.382;
            }
            padding = Math.ceil(padding);
            left = padding;
            right = padding;
        } else if (protyle.element.clientWidth > Constants.SIZE_EDITOR_WIDTH) {
            left = 96;
            right = 96;
        }
    }
    return {
        left, right, bottom, top: 16
    };
};