window.addEventListener('DOMContentLoaded', init);

var invidiousInstancesRegex = [];
for (const url of supportedInvidiousInstances) {
    invidiousInstancesRegex.push("*://*." + url + "/*");
}

async function init() {
    localizeHtmlPage();

    // Set all of the toggle options to the correct option
    let optionsContainer = document.getElementById("options");
    let optionsElements = optionsContainer.children;

    // How many checks are left to be done
    let checksLeft = 0;

    for (let i = 0; i < optionsElements.length; i++) {
        switch (optionsElements[i].getAttribute("option-type")) {
            case "toggle": 
                let option = optionsElements[i].getAttribute("sync-option");
                chrome.storage.sync.get([option], function(result) {
                    let optionResult = result[option];
                    let checkbox = optionsElements[i].querySelector("input");
                    let reverse = optionsElements[i].getAttribute("toggle-type") === "reverse";

                    if (optionResult != undefined) {
                        checkbox.checked = optionResult;

                        if (reverse) {
                            optionsElements[i].querySelector("input").checked = !optionResult;
                        }
                    }

                    // See if anything extra should be run first time
                    switch (option) {
                        case "supportInvidious":
                            invidiousInit(checkbox, option);
                            break;
                    }

                    // Add click listener
                    checkbox.addEventListener("click", () =>{
                        setOptionValue(option, reverse ? !checkbox.checked : checkbox.checked);

                        // See if anything extra must be run
                        switch (option) {
                            case "supportInvidious":
                                invidiousOnClick(checkbox, option);
                                break;
                        }
                    });

                    checksLeft--;
                });

                checksLeft++;
                break;
            case "text-change":
                let button = optionsElements[i].querySelector(".trigger-button");
                button.addEventListener("click", () => activateTextChange(optionsElements[i]));

                break;
            case "keybind-change":
                let keybindButton = optionsElements[i].querySelector(".trigger-button");
                keybindButton.addEventListener("click", () => activateKeybindChange(optionsElements[i]));

                break;
        }
    }

    // Don't wait on chrome
    if (isFirefox()) {
        await wait(() => checksLeft == 0, 1000, 50);
    }

    optionsContainer.classList.remove("hidden");
    optionsContainer.classList.add("animated");
}

/**
 * Run when the invidious button is being initialized
 * 
 * @param {HTMLElement} checkbox 
 * @param {string} option 
 */
function invidiousInit(checkbox, option) {
    let permissions = ["declarativeContent"];
    if (isFirefox()) permissions = [];

    chrome.permissions.contains({
        origins: invidiousInstancesRegex,
        permissions: permissions
    }, function (result) {
        if (result != checkbox.checked) {
            setOptionValue(option, result);

            checkbox.checked = result;
        }
    });
}

/**
 * Run whenever the invidious checkbox is clicked
 * 
 * @param {HTMLElement} checkbox 
 * @param {string} option 
 */
function invidiousOnClick(checkbox, option) {
    if (checkbox.checked) {
        // Request permission
        let permissions = ["declarativeContent"];
        if (isFirefox()) permissions = [];

        chrome.permissions.request({
            origins: invidiousInstancesRegex,
            permissions: permissions
        }, async function (granted) {
            if (granted) {
                let js = [
                    "config.js",
                    "utils/previewBar.js",
                    "utils/skipNotice.js",
                    "utils.js",
                    "content.js",
                    "popup.js"
                ];
                let css = [
                    "content.css",
                    "./libs/Source+Sans+Pro.css",
                    "popup.css"
                ];

                if (isFirefox()) {
                    let firefoxJS = [];
                    for (const file of js) {
                        firefoxJS.push({file});
                    }
                    let firefoxCSS = [];
                    for (const file of css) {
                        firefoxCSS.push({file});
                    }

                    let registration = await browser.contentScripts.register({
                        allFrames: true,
                        js: firefoxJS,
                        css: firefoxCSS,
                        matches: invidiousInstancesRegex
                    });
                } else {
                    chrome.declarativeContent.onPageChanged.removeRules(["invidious"], function() {
                        let conditions = [];
                        for (const regex of invidiousInstancesRegex) {
                            conditions.push(new chrome.declarativeContent.PageStateMatcher({
                                pageUrl: { urlMatches: regex }
                            }));
                        }
                        // Add page rule
                        let rule = {
                            id: "invidious",
                            conditions,
                            actions: [new chrome.declarativeContent.RequestContentScript({
                                    allFrames: true,
                                    js,
                                    css
                            })]
                        };
                        
                        chrome.declarativeContent.onPageChanged.addRules([rule]);
                    });
                }
            } else {
                setOptionValue(option, false);
                checkbox.checked = false;

                chrome.declarativeContent.onPageChanged.removeRules(["invidious"]);
            }
        });
    } else {
        if (isFirefox()) {
            // Nothing for now
        } else {
            chrome.declarativeContent.onPageChanged.removeRules(["invidious"]);
        }

        chrome.permissions.remove({
            origins: invidiousInstancesRegex
        });
    }
}

/**
 * Will trigger the container to ask the user for a keybind.
 * 
 * @param {HTMLElement} element 
 */
function activateKeybindChange(element) {
    let button = element.querySelector(".trigger-button");
    if (button.classList.contains("disabled")) return;

    button.classList.add("disabled");

    let option = element.getAttribute("sync-option");

    chrome.storage.sync.get([option], function(result) {
        let currentlySet = result[option] !== null ? chrome.i18n.getMessage("keybindCurrentlySet") : "";
        
        let status = element.querySelector(".option-hidden-section > .keybind-status");
        status.innerText = chrome.i18n.getMessage("keybindDescription") + currentlySet;

        if (result[option] !== null) {
            let statusKey = element.querySelector(".option-hidden-section > .keybind-status-key");
            statusKey.innerText = result[option];
        }
    
        element.querySelector(".option-hidden-section").classList.remove("hidden");
        
        document.addEventListener("keydown", (e) => keybindKeyPressed(element, e), {once: true});
    });
}

/**
 * Called when a key is pressed in an activiated keybind change option.
 * 
 * @param {HTMLElement} element 
 * @param {KeyboardEvent} e
 */
function keybindKeyPressed(element, e) {
    e = e || window.event;
    var key = e.key;

    let option = element.getAttribute("sync-option");

    chrome.storage.sync.set({[option]: key});

    let status = element.querySelector(".option-hidden-section > .keybind-status");
    status.innerText = chrome.i18n.getMessage("keybindDescriptionComplete");

    let statusKey = element.querySelector(".option-hidden-section > .keybind-status-key");
    statusKey.innerText = key;

    let button = element.querySelector(".trigger-button");

    button.classList.remove("disabled");
}

/**
 * Will trigger the textbox to appear to be able to change an option's text.
 * 
 * @param {HTMLElement} element 
 */
function activateTextChange(element) {
    let button = element.querySelector(".trigger-button");
    if (button.classList.contains("disabled")) return;

    button.classList.add("disabled");

    let textBox = element.querySelector(".option-text-box");
    let option = element.getAttribute("sync-option");

    chrome.storage.sync.get([option], function(result) {
        textBox.value = result[option];

        let setButton = element.querySelector(".text-change-set");
        setButton.addEventListener("click", () => setOptionValue(option, textBox.value));

        element.querySelector(".option-hidden-section").classList.remove("hidden");
    });
}

/**
 * Called when an option has been changed.
 * 
 * @param {string} option 
 * @param {*} value 
 */
function setOptionValue(option, value) {
    chrome.storage.sync.set({[option]: value});
}