/* eslint no-unused-vars: 0 */

/*
 * These are routines used by our testing code.
 */

/* Detect if we have any shadow DOM */
window.__haveShadowDom = function() {
    if (window.__haveShadowDomResult === undefined)
        window.__haveShadowDomResult = !!Array.from(document.querySelectorAll('*')).find(el => el.shadowRoot);

    return window.__haveShadowDomResult;
};

// Like querySelectorAll(), but traverses shadow DOM
window.querySelectorAllDeep = function(query, element) {
    const result = Array.from(
        element.shadowRoot
            ? element.shadowRoot.childNodes
            : element.nodeName === 'SLOT' ? element.assignedElements() : element.childNodes,
    )
            .filter(element => element instanceof Element)
            .map(element => window.querySelectorAllDeep(query, element))
            .flat();

    if (element.matches?.(query))
        result.push(element);
    return result;
};

window.ph_select = function(sel) {
    if (sel.includes(":contains(")) {
        if (!window.Sizzle) {
            throw new Error("Using ':contains' when window.Sizzle is not available.");
        }
        return window.Sizzle(sel);
    } else if (window.__haveShadowDom()) {
        return window.querySelectorAllDeep(sel, document);
    } else {
        return Array.from(document.querySelectorAll(sel));
    }
};

window.ph_only = function(els, sel) {
    if (els.length === 0)
        throw new Error(sel + " not found");
    if (els.length > 1)
        throw new Error(sel + " is ambiguous");
    return els[0];
};

window.ph_find = function(sel) {
    const els = window.ph_select(sel);
    return window.ph_only(els, sel);
};

window.ph_find_scroll_into_view = function(sel) {
    const el = window.ph_find(sel);
    /* we cannot make this conditional, as there is no way to find out whether
       an element is currently visible -- the usual trick to compare getBoundingClientRect() against
       window.innerHeight does not work if the element is in e.g. a scrollable dialog area */
    return new Promise(resolve => {
        el.scrollIntoView({ behaviour: 'instant', block: 'center', inline: 'center' });
        // scrolling needs a little bit of time to stabilize, and it's not predictable
        // in particular, 'scrollend' is not reliably emitted
        window.setTimeout(() => resolve(el), 200);
    });
};

window.ph_count = function(sel) {
    const els = window.ph_select(sel);
    return els.length;
};

window.ph_count_check = function(sel, expected_num) {
    return (window.ph_count(sel) == expected_num);
};

window.ph_val = function(sel) {
    const el = window.ph_find(sel);
    if (el.value === undefined)
        throw new Error(sel + " does not have a value");
    return el.value;
};

window.ph_set_val = function(sel, val) {
    const el = window.ph_find(sel);
    if (el.value === undefined)
        throw new Error(sel + " does not have a value");
    el.value = val;
    const ev = new Event("change", { bubbles: true, cancelable: false });
    el.dispatchEvent(ev);
};

window.ph_has_val = function(sel, val) {
    return window.ph_val(sel) == val;
};

window.ph_collected_text_is = function(sel, val) {
    const els = window.ph_select(sel);
    const rest = els.map(el => {
        if (el.textContent === undefined)
            throw new Error(sel + " can not have text");
        return el.textContent.replaceAll("\xa0", " ");
    }).join("");
    return rest === val;
};

window.ph_text = function(sel) {
    const el = window.ph_find(sel);
    if (el.textContent === undefined)
        throw new Error(sel + " can not have text");

    // HACK: https://github.com/patternfly/patternfly-react/issues/11678
    const el_copy = el.cloneNode(true);
    // find and clear .pf-v6-screen-reader subelements for HelperText
    el_copy.querySelectorAll('.pf-v6-c-helper-text__item-text > .pf-v6-screen-reader').forEach(el => { el.textContent = '' });

    // 0xa0 is a non-breakable space, which is a rendering detail of Chromium
    // and awkward to handle in tests; turn it into normal spaces
    return el_copy.textContent.replaceAll("\xa0", " ");
};

window.ph_attr = function(sel, attr) {
    return window.ph_find(sel).getAttribute(attr);
};

window.ph_set_attr = function(sel, attr, val) {
    const el = window.ph_find(sel);
    if (val === null || val === undefined)
        el.removeAttribute(attr);
    else
        el.setAttribute(attr, val);

    const ev = new Event("change", { bubbles: true, cancelable: false });
    el.dispatchEvent(ev);
};

window.ph_has_attr = function(sel, attr, val) {
    return window.ph_attr(sel, attr) == val;
};

window.ph_attr_contains = function(sel, attr, val) {
    const a = window.ph_attr(sel, attr);
    return a && a.indexOf(val) > -1;
};

window.ph_mouse = function(sel, type, x, y, btn, ctrlKey, shiftKey, altKey, metaKey) {
    const el = window.ph_find(sel);

    /* The element has to be visible, and not collapsed */
    if (el.offsetWidth <= 0 && el.offsetHeight <= 0 && el.tagName != 'svg')
        throw new Error(sel + " is not visible");

    /* The event has to actually work */
    let processed = false;
    function handler() {
        processed = true;
    }

    el.addEventListener(type, handler, true);

    let elp = el;
    let left = elp.offsetLeft || 0;
    let top = elp.offsetTop || 0;
    while (elp.offsetParent) {
        elp = elp.offsetParent;
        left += elp.offsetLeft;
        top += elp.offsetTop;
    }

    let detail = 0;
    if (["click", "mousedown", "mouseup"].indexOf(type) > -1)
        detail = 1;
    else if (type === "dblclick")
        detail = 2;

    const ev = new MouseEvent(type, {
        bubbles: true,
        cancelable: true,
        view: window,
        detail,
        screenX: left + x,
        screenY: top + y,
        clientX: left + x,
        clientY: top + y,
        button: btn,
        ctrlKey: ctrlKey || false,
        shiftKey: shiftKey || false,
        altKey: altKey || false,
        metaKey: metaKey || false
    });

    el.dispatchEvent(ev);

    el.removeEventListener(type, handler, true);

    /* It really had to work */
    if (!processed)
        throw new Error(sel + " is disabled or somehow doesn't process events");
};

window.ph_get_checked = function(sel) {
    const el = window.ph_find(sel);
    if (el.checked === undefined)
        throw new Error(sel + " is not checkable");

    return el.checked;
};

window.ph_set_checked = function(sel, val) {
    const el = window.ph_find(sel);
    if (el.checked === undefined)
        throw new Error(sel + " is not checkable");

    if (el.checked != val)
        window.ph_mouse(sel, "click", 0, 0, 0);
};

window.ph_is_visible = function(sel) {
    const el = window.ph_find(sel);
    return el.tagName == "svg" || ((el.offsetWidth > 0 || el.offsetHeight > 0) && !(el.style.visibility == "hidden" || el.style.display == "none"));
};

window.ph_is_present = function(sel) {
    const els = window.ph_select(sel);
    return els.length > 0;
};

window.ph_in_text = function(sel, text) {
    return window.ph_text(sel).indexOf(text) != -1;
};

window.ph_text_is = function(sel, text) {
    return window.ph_text(sel) == text;
};

window.ph_text_matches = function(sel, pattern) {
    return window.ph_text(sel).match(pattern);
};

window.ph_go = function(href) {
    if (href.indexOf("#") === 0) {
        window.location.hash = href;
    } else {
        if (window.name.indexOf("cockpit1") !== 0)
            throw new Error("ph_go() called in non cockpit window");
        const control = {
            command: "jump",
            location: href
        };
        window.parent.postMessage("\n" + JSON.stringify(control), "*");
    }
};

window.ph_focus = function(sel) {
    window.ph_find(sel).focus();
};

window.ph_scrollIntoViewIfNeeded = function(sel) {
    window.ph_find(sel).scrollIntoViewIfNeeded();
};

window.ph_blur = function(sel) {
    window.ph_find(sel).blur();
};

window.ph_blur_active = function() {
    const elt = window.document.activeElement;
    if (elt)
        elt.blur();
};

class PhWaitCondTimeout extends Error {
    constructor(description) {
        if (description && description.apply)
            description = description.apply();
        if (description)
            super(description);
        else
            super("condition did not become true");
    }
}

window.ph_wait_cond = function(cond, timeout, error_description) {
    return new Promise((resolve, reject) => {
        // poll every 100 ms for now;  FIXME: poll less often and re-check on mutations using
        // https://developer.mozilla.org/en-US/docs/Web/API/MutationObserver
        let stepTimer = null;
        let last_err = null;
        const tm = window.setTimeout(() => {
            if (stepTimer)
                window.clearTimeout(stepTimer);
            reject(last_err || new PhWaitCondTimeout(error_description));
        }, timeout);
        function step() {
            try {
                if (cond()) {
                    window.clearTimeout(tm);
                    resolve();
                    return;
                }
            } catch (err) {
                last_err = err;
            }
            stepTimer = window.setTimeout(step, 100);
        }
        step();
    });
};

function currentFrameAbsolutePosition() {
    let currentWindow = window;
    let currentParentWindow;
    const positions = [];
    let rect;

    while (currentWindow !== window.top) {
        currentParentWindow = currentWindow.parent;
        for (let idx = 0; idx < currentParentWindow.frames.length; idx++)
            if (currentParentWindow.frames[idx] === currentWindow) {
                for (const frameElement of currentParentWindow.document.getElementsByTagName('iframe')) {
                    if (frameElement.contentWindow === currentWindow) {
                        rect = frameElement.getBoundingClientRect();
                        positions.push({ x: rect.x, y: rect.y });
                    }
                }
                currentWindow = currentParentWindow;
                break;
            }
    }

    return positions.reduce((accumulator, currentValue) => {
        return {
            x: accumulator.x + currentValue.x,
            y: accumulator.y + currentValue.y
        };
    }, { x: 0, y: 0 });
}

function flatten(array_of_arrays) {
    if (array_of_arrays.length > 0)
        return Array.prototype.concat.apply([], array_of_arrays);
    else
        return [];
}

window.ph_selector_clips = function(sels) {
    const f = currentFrameAbsolutePosition();
    const elts = flatten(sels.map(window.ph_select));
    return elts.map(e => {
        const r = e.getBoundingClientRect();
        return { x: r.x + f.x, y: r.y + f.y, width: r.width, height: r.height, scale: 1 };
    });
};

window.ph_element_clip = function(sel) {
    window.ph_find(sel); // just to make sure it is not ambiguous
    return window.ph_selector_clips([sel])[0];
};

window.ph_count_animations = function(sel) {
    return window.ph_find(sel).getAnimations({ subtree: true }).length;
};

window.ph_set_texts = function(new_texts) {
    for (const sel in new_texts) {
        const elts = window.ph_select(sel);
        if (elts.length == 0)
            throw new Error(sel + " not found");
        for (let elt of elts) {
            // We have to be careful to not replace any actual nodes
            // in the DOM since that would cause React to fail later
            // when it tries to remove some of its nodes that are no
            // longer in the DOM.  This means that setting the
            // "textContent" property is out, for example.
            //
            // Instead, we insist on finding an actual "Text" node
            // that we then modify.  If the given selector results in
            // elements that have other elements in them, we refuse to
            // mock them.
            //
            // However, for convenience, this function digs into
            // elements that have exactly one other child element.
            while (elt.children.length == 1)
                elt = elt.children[0];
            if (elt.children.length != 0)
                throw new Error(sel + " can not be mocked since it contains more than text");
            let subst = new_texts[sel];
            for (const n of elt.childNodes) {
                if (n.nodeType == 3) { // 3 == TEXT
                    n.data = subst;
                    subst = "";
                }
            }
        }
    }
};
