/* line numbers */
updateLineNumber(location.hash);

for (let line of document.querySelectorAll('.line-number')) {
    line.addEventListener("click", () =>
        updateLineNumber(line.attributes.getNamedItem("id").value));
}

function updateLineNumber(id) {
    if (id && id.startsWith('#')) {
        id = id.substring(1);
    }

    if (!id) {
        return;
    }

    let element = document.getElementById(id);
    if (element.classList.contains("line-number")) {
        for (const line of document.querySelectorAll(".line-active")) {
            line.classList.remove("line-active");
        }
        element.closest('.entry').classList.add('line-active');
    }
}

/* Scroll to top/bottom buttons */
const downButton = document.getElementById("down-button");
if (downButton) {
    downButton.addEventListener("click", () => scrollToHeight(document.body.scrollHeight));
}

const upButton = document.getElementById("up-button");
if (upButton) {
    upButton.addEventListener("click", () => scrollToHeight(0));
}

/**
 * Scroll to a specific height
 * Disable smooth scrolling for large pages
 * @param {number} top height to scroll to
 * @param {number} [smoothScrollLimit] only use smooth scrolling if the distance is less than this value
 */
function scrollToHeight(top, smoothScrollLimit = 10000) {
    const distance = Math.abs(document.documentElement.scrollTop - top);
    const behavior = (distance < smoothScrollLimit) ? "smooth" : "instant";
    window.scrollTo({left: 0, top, behavior});
}

/* error collapse toggle */
const toggleErrorsButton = document.getElementById("error-toggle");
if (toggleErrorsButton) {
    toggleErrorsButton.addEventListener("click", toggleErrors);
}

function toggleErrors() {
    if (toggleErrorsButton.classList.contains("toggled")) {
        toggleErrorsButton.classList.remove("toggled");
        uncollapseAllErrors();
    } else {
        toggleErrorsButton.classList.add("toggled");
        collapseAllErrors();
    }
}

function collapseAllErrors() {
    let firstNoErrorLine = false;
    let lines = document.querySelectorAll('.log-inner > .entry');
    let totalLines = lines.length;
    for (const [i, line] of lines.entries()) {
        let lineNumber = line.querySelector(".line-number").innerHTML;
        if (line.classList.contains("entry-no-error")) {
            line.style.display = "none";

            if (firstNoErrorLine === false) {
                firstNoErrorLine = lineNumber;
            }

            if (i + 1 === totalLines && firstNoErrorLine) {
                line.insertAdjacentElement("afterend", generateCollapsedLines(firstNoErrorLine, lineNumber));
            }
        } else {
            if (firstNoErrorLine) {
                line.insertAdjacentElement("beforebegin", generateCollapsedLines(firstNoErrorLine, lineNumber - 1));
                firstNoErrorLine = false;
            }
        }
    }
}

function uncollapseAllErrors() {
    document.querySelectorAll('.entry-no-error').forEach(line => line.style.removeProperty("display"));
    document.querySelectorAll('.collapsed-lines').forEach(collapsed => collapsed.remove());
}

function handleCollapsedClick(e) {
    let collapsed = e.currentTarget;
    let positionElement = document.getElementById(`L${parseInt(collapsed.dataset.end) + 1}`);
    let position;
    if (positionElement) {
        position = positionElement.getBoundingClientRect().top - window.scrollY;
    }
    for (let i = parseInt(collapsed.dataset.start); i <= parseInt(collapsed.dataset.end); i++) {
        document.getElementById(`L${i}`).parentElement.parentElement.style.removeProperty("display");
    }
    if (positionElement) {
        window.scrollTo({
            left: 0,
            top: positionElement.getBoundingClientRect().top - position - collapsed.offsetHeight,
            behavior: "instant"
        });
    }
    collapsed.remove();
}

function generateCollapsedLines(start, end) {
    let count = end - start + 1;
    let string = count === 1 ? "line" : "lines";

    let collapsedRow = document.createElement("div");
    collapsedRow.classList.add("collapsed-lines");
    collapsedRow.dataset.start = start;
    collapsedRow.dataset.end = end;
    collapsedRow.appendChild(document.createElement("div"));
    collapsedRow.addEventListener("click", handleCollapsedClick);

    let collapsedLinesCount = document.createElement("div");
    collapsedLinesCount.classList.add("collapsed-lines-count");
    let icon = document.createElement("i");
    icon.classList.add("fa-solid", "fa-angle-up");
    collapsedLinesCount.appendChild(icon);
    collapsedLinesCount.append(` ${count} ${string} `);
    collapsedLinesCount.append(icon.cloneNode());
    collapsedRow.appendChild(collapsedLinesCount);

    return collapsedRow;
}

/* convert timestamps */
let timeElements = document.querySelectorAll('[data-time]');
for (const element of timeElements) {
    const timestamp = parseInt(element.dataset.time);
    if (isNaN(timestamp)) {
        continue;
    }
    const date = new Date(timestamp * 1000);
    element.innerHTML = date.toLocaleString();
}

/* settings */
const settingCheckboxes = document.querySelectorAll(".setting-checkbox");
settingCheckboxes.forEach(checkbox => checkbox.addEventListener("change", handleSettingChange));

let settingsChannel = null;
if (typeof BroadcastChannel !== "undefined") {
    settingsChannel = new BroadcastChannel("mc-logs-settings");
    settingsChannel.onmessage = (e) => {
        if (e.data.type === "settings-updated") {
            for (const checkbox of settingCheckboxes) {
                checkbox.checked = !!e.data.settings[checkbox.dataset.key];
                applySetting(checkbox);
            }
        }
    };
}

function handleSettingChange(e) {
    let checkbox = e.target;
    applySetting(checkbox);
    saveSettings();
    if (settingsChannel) {
        settingsChannel.postMessage({
            type: "settings-updated",
            settings: getCurrentSettings()
        });
    }
}

function applySetting(checkbox) {
    let bodyClass = checkbox.dataset.bodyClass;
    if (checkbox.checked) {
        document.body.classList.add(bodyClass);
    } else {
        document.body.classList.remove(bodyClass);
    }
    switch (checkbox.dataset.key) {
        case "floatingScrollbar":
            initFloatingScrollbar();
            break;
    }
}

function getCurrentSettings() {
    const data = {};
    for (const checkbox of settingCheckboxes) {
        data[checkbox.dataset.key] = checkbox.checked;
    }
    return data;
}

function saveSettings() {
    const data = {};
    for (const checkbox of settingCheckboxes) {
        data[checkbox.dataset.key] = checkbox.checked;
    }
    document.cookie = "IBLOGS_SETTINGS=" + encodeURIComponent(JSON.stringify(data)) + ";path=/;expires=" + new Date(new Date().getTime() + 100 * 365 * 24 * 60 * 60 * 1000).toUTCString();
}

/* copy to clipboard */
const copyButtons = document.querySelectorAll("[data-clipboard]");
copyButtons.forEach(button => button.addEventListener("click", handleCopyButtonClick));
const doneClassName = "fa-solid fa-check";

async function handleCopyButtonClick(e) {
    const button = e.currentTarget;
    const data = button.dataset.clipboard;
    await navigator.clipboard.writeText(data);

    const iconElement = button.querySelector("i");
    if (!iconElement) {
        return;
    }
    const originalClassName = iconElement.className;
    if (originalClassName === doneClassName) {
        return;
    }
    iconElement.className = doneClassName;
    setTimeout(() => {
        iconElement.className = originalClassName;
    }, 2000);
}

/* delete button */
const deleteButton = document.querySelector(".delete-log-button");
const deleteErrorElement = document.querySelector(".delete-overlay .popover-error");
if (deleteButton) {
    deleteButton.addEventListener("click", handleDeleteButtonClick);
}

async function handleDeleteButtonClick() {
    deleteErrorElement.style.display = "none";
    const response = await fetch(window.location.href, {
        method: "DELETE",
        credentials: "include"
    });
    if (!response.ok) {
        deleteErrorElement.style.display = "block";
        deleteErrorElement.textContent = `${response.status} (${response.statusText})`;
        return;
    }
    window.location.href = "/";
}

/* floating scroll bar */
const browser = getComputedStyle(document.body)
    .getPropertyValue("--browser")
    .replaceAll(/['"]/g, '')
    .trim()
    .toLowerCase();
const floatingScrollbar = document.querySelector(".floating-scrollbar");
let logContainer = null;
if (browser === "firefox") {
    logContainer = document.querySelector(".log");
} else {
    logContainer = document.querySelector(".log-inner");
}

if (floatingScrollbar && logContainer) {
    updateFloatingScrollbarWidths();

    floatingScrollbar.addEventListener("scroll", () => {
        syncScroll(floatingScrollbar, logContainer);
    });

    logContainer.addEventListener("scroll", () => {
        syncScroll(logContainer, floatingScrollbar);
    });

    const observer = new ResizeObserver(() => {
        updateFloatingScrollbarWidths();
    });
    observer.observe(logContainer);
}

function syncScroll(source, target) {
    if (Math.abs(source.scrollLeft - target.scrollLeft) > 1) {
        target.scrollLeft = source.scrollLeft;
    }
}

function initFloatingScrollbar() {
    if (!floatingScrollbar || !logContainer) {
        return;
    }
    updateFloatingScrollbarWidths();
    syncScroll(logContainer, floatingScrollbar);
}

function updateFloatingScrollbarWidths() {
    floatingScrollbar.style.setProperty(
        "--floating-scrollbar-width",
        `${logContainer.clientWidth}px`
    );

    floatingScrollbar.style.setProperty(
        "--floating-scrollbar-content-width",
        `${logContainer.scrollWidth}px`
    );
}