/**
 * @file Supporting classes for leftychan javascript.
 * @author jonsmy
 */

globalThis.LCNSite = class LCNSite {
    static INSTANCE = null;

    static "createAbortable" () {
        const obj = { "abort": null, "controller": null, "signal": null }
        const setupController = () => {
            obj.controller = new AbortController()
            obj.signal = obj.controller.signal
        }

        obj.abort = () => {
            obj.controller.abort()
            setupController()
        }

        setupController()
        return obj
    }

    static "getThreadFromPages" (pages, thread_id) {
        for (const page of pages) {
            for (const thread of page.threads) {
                if (thread_id == String(thread.no)) {
                    return { "page": page.page, ...thread }
                }
            }
        }

        return null
    }

    #isModerator = document.body.classList.contains("is-moderator");
    #isThreadPage = document.body.classList.contains("active-thread");
    #isBoardPage = document.body.classList.contains("active-board");
    #isCatalogPage = document.body.classList.contains("active-catalog");

    #isModPage = location.pathname == "/mod.php";
    #isModRecentsPage = this.#isModPage && (location.search == "?/recent" || location.search.startsWith("?/recent/"));
    #isModReportsPage = this.#isModPage && (location.search == "?/reports" || location.search.startsWith("?/reports/"));
    #isModLogPage   = this.#isModPage && (location.search == "?/log" || location.search.startsWith("?/log/"));

    "isModerator" () { return this.#isModerator; }
    "isThreadPage" () { return this.#isThreadPage; }
    "isBoardPage" () { return this.#isBoardPage; }
    "isCatalogPage" () { return this.#isCatalogPage; }

    "isModPage" () { return this.#isModPage; }
    "isModRecentsPage" () { return this.#isModRecentsPage; }
    "isModReportsPage" () { return this.#isModReportsPage; }
    "isModLogPage" () { return this.#isModLogPage; }

    #unseen = 0;
    "getUnseen" () { return this.#unseen; }
    "clearUnseen" () { if (this.#unseen != 0) { this.setUnseen(0); } }
    "setUnseen" (int) {
        const bool = !!int
        if (bool != !!this.#unseen) {
            this.setFaviconType(bool ? "reply" : null)
        }
        this.#unseen = int
        this.#doTitleUpdate()
    }

    #pageTitle = document.title;
    "getTitle" () { return this.#pageTitle; }
    "setTitle" (title) { this.#pageTitle = title; this.#doTitleUpdate(); }
    #doTitleUpdate () { document.title = (this.#unseen > 0 ? `(${this.#unseen}) ` : "") + this.#pageTitle; }

    #favicon = document.querySelector("head > link[rel=\"shortcut icon\"]");
    "setFaviconType" (type=null) {
        if (this.#favicon == null) {
            this.#favicon = document.createElement("link")
            this.#favicon.rel = "shortcut icon"
            document.head.appendChild(this.#favicon)
        }

        this.#favicon.href = `/favicon${type ? "-" + type : ""}.ico`
    }

    "getFloaterLContainer" () { return document.getElementById("bar-bottom-l"); }
    "getFloaterRContainer" () { return document.getElementById("bar-bottom-r"); }
    "getThreadStatsLContainer" () { return document.getElementById("lcn-threadstats-l"); }
    "getThreadStatsRContainer" () { return document.getElementById("lcn-threadstats-r"); }

    #generatedStyle = null;
    "writeCSSStyle" (origin, stylesheet) {
        if (this.#generatedStyle == null && (this.#generatedStyle = document.querySelector("head > style.generated-css")) == null) {
            this.#generatedStyle = document.createElement("style")
            this.#generatedStyle.classList.add("generated-css")
            document.head.appendChild(this.#generatedStyle)
        }
        this.#generatedStyle.textContent += `${this.#generatedStyle.textContent.length ? "\n\n" : ""}/*** Generated by ${origin} ***/\n${stylesheet}`
    }

}

globalThis.LCNPostInfo = class LCNPostInfo {

    static nodeAttrib = "$LCNPostInfo";
    static selector = ".post:not(.grid-li)";
    #boardId = null;
    #threadId = null;
    #postId = null;
    #name = null;
    #email = null;
    #capcode = null;
    #flag = null;
    #ip = null;
    #subject = null;
    #createdAt = null;

    #parent = null;
    #isThread = false;
    #isReply = false;
    #isLocked = false;
    #isSticky = false;

    static "assign" (post) { return post[this.nodeAttrib] ?? (post[this.nodeAttrib] = this.from(post)); }
    static "from" (post) {
        assert.ok(post.classList.contains("post"), "Arty must be expected Element.")
        const inst = new this()
        const intro = post.querySelector(".intro")
        const link = intro.querySelector(".post_no:not([id])").href.split("/").reverse()
        inst.#postId = link[0].slice(link[0].indexOf("#q") + 2)
        inst.#threadId = link[0].slice(0, link[0].indexOf("."))
        inst.#boardId = link[2]
        inst.#isThread = post.classList.contains("op")
        inst.#isReply = !inst.#isThread

        inst.#subject = intro.querySelector(".subject")?.innerText ?? null
        inst.#name = intro.querySelector(".name")?.innerText ?? null
        inst.#email = intro.querySelector(".email")?.href.slice(7) ?? null
        inst.#flag = intro.querySelector(".flag")?.src.split("/").reverse()[0].slice(0, -4) ?? null

        inst.#capcode = intro.querySelector(".capcode")?.innerText ?? null
        inst.#ip = intro.querySelector(".ip-link")?.innerText ?? null
        inst.#createdAt = new Date(intro.querySelector("time[datetime]").dateTime ?? NaN)

        inst.#isSticky = !!intro.querySelector("i.fa-thumb-tack")
        inst.#isLocked = !!intro.querySelector("i.fa-lock")

        return inst
    }

    "getParent" () { return this.#parent; }
    "__setParent" (inst) { return this.#parent = inst; }

    "getBoardId" () { return this.#boardId; }
    "getThreadId" () { return this.#threadId; }
    "getPostId" () { return this.#postId; }
    "getHref" () { return `/${this.boardId}/res/${this.threadId}.html#q${this.postId}`; }

    "getName" () { return this.#name; }
    "getEmail" () { return this.#email; }
    "getIP" () { return this.#ip; }
    "getCapcode" () { return this.#capcode; }
    "getSubject" () { return this.#subject; }
    "getCreatedAt" () { return this.#createdAt; }

    "isSticky" () { return this.#isSticky; }
    "isLocked" () { return this.#isLocked; }
    "isThread" () { return this.#isThread; }
    "isReply" () { return this.#isReply; }

    "is" (info) {
        assert.ok(info, "Must be LCNPost.")
        return this.getBoardId() == info.getBoardId() && this.getPostId() == info.getPostId()
    }

}

globalThis.LCNPost = class LCNPost {

    static nodeAttrib = "$LCNPost";
    static selector = ".post:not(.grid-li)";
    #parent = null;
    #post = null;
    #info = null;
    #ipLink = null;
    #controls = null;
    #customControlsSeperatorNode = null;

    static "assign" (post) { return post[this.nodeAttrib] ?? (post[this.nodeAttrib] = this.from(post)); }
    static "from" (post) { return new this(post); }

    "constructor" (post) {
        assert.ok(post.classList.contains("post"), "Arty must be expected Element.")
        const intro = post.querySelector(".intro")
        this.#post = post
        this.#info = LCNPostInfo.assign(post)
        this.#ipLink = intro.querySelector(".ip-link")
        this.#controls = Array.prototype.at.apply(post.querySelectorAll(".controls"), [ -1 ])

        assert.equal(this.#info.getParent(), null, "Info should not have parent.")
        this.#info.__setParent(this)
    }

    "jQuery" () { return $(this.#post); }
    "trigger" (event_id, data=null) { $(this.#post).trigger(event_id, [ data ]); }

    "getElement" () { return this.#post; }
    "getInfo" () { return this.#info; }

    "getIPLink" () { return this.#ipLink; }
    "setIP" (ip) { this.#ipLink.innerText = ip; }

    "getParent" () { return this.#parent; }
    "__setParent" (inst) { return this.#parent = inst; }

    static #NBSP = String.fromCharCode(160);
    "addCustomControl" (obj) {
        if (LCNSite.INSTANCE.isModerator()) {
            const link = document.createElement("a")
            link.innerText = `[${obj.btn}]`
            link.title = obj.tooltip

            if (typeof obj.href == "string") {
                link.href = obj.href
                link.referrerPolicy = "no-referrer"
            } else if (obj.onClick != undefined) {
                link.style.cursor = "pointer"
                link.addEventListener("click", e => { e.preventDefault(); obj.onClick(this); })
            }

            if (this.#customControlsSeperatorNode == null) {
                this.#controls.insertBefore(this.#customControlsSeperatorNode = new Text(`${this.constructor.#NBSP}-${this.constructor.#NBSP}`), this.#controls.firstElementChild)
            } else {
                this.#controls.insertBefore(new Text(this.constructor.#NBSP), this.#customControlsSeperatorNode)
            }

            this.#controls.insertBefore(link, this.#customControlsSeperatorNode)
        }
    }

}

globalThis.LCNThread = class LCNThread {

    static nodeAttrib = "$LCNThread";
    static selector = ".thread:not(.grid-li)";
    #element = null;
    #parent = null;
    #op = null;

    static "assign" (thread) { return thread[this.nodeAttrib] ?? (thread[this.nodeAttrib] = this.from(thread)); }
    static "from" (thread) { return new this(thread); }

    "constructor" (thread) {
        assert.ok(thread.classList.contains("thread"), "Arty must be expected Element.")
        this.#element = thread
        this.#op = LCNPost.assign(this.#element.querySelector(".post.op"))

        //assert.equal(this.#op.getParent(), null, "Op should not have parent.")
        this.#op.__setParent(this)
    }

    "getElement" () { return this.#element; }
    "getContent" () { return this.#op; }
    "getPosts" () { return Array.prototype.map.apply(this.#element.querySelectorAll(".post"), [ el => LCNPost.assign(el) ]); }
    "getReplies" () { return Array.prototype.map.apply(this.#element.querySelectorAll(".post:not(.op)"), [ el => LCNPost.assign(el) ]); }

    "getParent" () { return this.#parent; }
    "__setParent" (inst) { return this.#parent = inst; }
}


globalThis.LCNPostContainer = class LCNPostContainer {

    static nodeAttrib = "$LCNPostContainer";
    static selector = ".postcontainer";
    #parent = null;
    #element = null;
    #content = null;
    #postId = null;
    #boardId = null;

    static "assign" (container) { return container[this.nodeAttrib] ?? (container[this.nodeAttrib] = this.from(container)); }
    static "from" (container) { return new this(container); }

    "constructor" (container) {
        assert.ok(container.classList.contains("postcontainer"), "Arty must be expected Element.")
        const child = container.querySelector(".thread, .post")
        this.#element = container
        this.#content = child.classList.contains("thread") ? LCNThread.assign(child) : LCNPost.assign(child)
        this.#boardId = container.dataset.board
        this.#postId = container.id.slice(2)

        assert.equal(this.#content.getParent(), null, "Content should not have parent.")
        this.#content.__setParent(this)
    }

    "getElement" () { return this.#element; }
    "getContent" () { return this.#content; }
    "getBoardId" () { return this.#boardId; }
    "getPostId" () { return this.#postId; }

    "getParent" () { return this.#parent; }
    "__setParent" (inst) { return this.#parent = inst; }

}

globalThis.LCNPostWrapper = class LCNPostWrapper {

    static nodeAttrib = "$LCNPostWrapper";
    static selector = ".post-wrapper";
    #wrapper = null;
    #eitaLink = null;
    #eitaId = null;
    #eitaHref = null
    #content = null;

    static "assign" (wrapper) { return wrapper[this.nodeAttrib] ?? (wrapper[this.nodeAttrib] = this.from(wrapper)); }
    static "from" (wrapper) { return new this(wrapper); }

    "constructor" (wrapper) {
        assert.ok(wrapper.classList.contains("post-wrapper"), "Arty must be expected Element.")
        this.#wrapper = wrapper
        this.#eitaLink = wrapper.querySelector(".eita-link")
        this.#eitaId = this.#eitaLink.id
        this.#eitaHref = this.#eitaLink.href
        void Array.prototype.find.apply(wrapper.children, [
            el => {
                if (el.classList.contains("thread")) {
                    return this.#content = LCNThread.assign(el)
                } else if (el.classList.contains("postcontainer")) {
                    return this.#content = LCNPostContainer.assign(el)
                }
            }
        ])

        assert.ok(this.#content, "Wrapper should contain content.")
        assert.equal(this.#content.getParent(), null, "Content should not have parent.")
        this.#content.__setParent(this)
    }

    "getPost" () {
        const post = this.getContent().getContent()
        assert.ok(post instanceof LCNPost, "Post should be LCNPost.")
        return post
    }

    "getElement" () { return this.#wrapper; }
    "getContent" () { return this.#content; }
    "getEitaId" () { return this.#eitaId; }
    "getEitaHref" () { return this.#eitaHref; }
    "getEitaLink" () { return this.#eitaLink; }

}

globalThis.LCNSetting = class LCNSetting {
    #id = null;
    #eventId = null;
    #label = null;
    #hidden = false;
    #value = null;
    #valueDefault = null;

    static "build" (id) { return new this(id); }

    "constructor" (id) {
        this.#id = id;
        this.#eventId = `lcnsetting::${this.#id}`
    }

    #getValue () {
        const v = localStorage.getItem(this.#id)
        if (v != null) {
            return this.__builtinValueImporter(v)
        } else {
            return this.#valueDefault
        }
    }

    "isHidden" () { return this.#hidden; }
    "setHidden" (v) { this.#hidden = v; return this; }

    "getValue" () { return this.#value ?? (this.#value = this.#getValue()); }
    "setValue" (v) {
        if (this.#value !== v) {
            this.#value = v
            localStorage.setItem(this.#id, this.__builtinValueExporter(this.#value))
            setTimeout(() => $(document).trigger(`${this.#eventId}::change`, [ v, this ]), 1)
        }
    }

    "getLabel" () { return this.#label; }
    "setLabel" (label) { this.#label = label; return this; }

    "getDefaultValue" () { return this.#valueDefault; }
    "setDefaultValue" (vd) { this.#valueDefault = vd; return this; }

    "onChange" (fn) { $(document).on(`${this.#eventId}::change`, (_,v,i) => fn(v, i)); }
    __setIdPrefix (prefix) {
        this.#id = `${prefix}_${this.#id}`
        this.#eventId = `lcnsetting::${this.#id}`
    }
}

globalThis.LCNToggleSetting = class LCNToggleSetting extends LCNSetting {
    __builtinValueImporter (v) { return v == "1"; }
    __builtinValueExporter (v) { return v ? "1" : ""; }
    __builtinDOMConstructor () {
        const div = document.createElement("div")
        const chk = document.createElement("input")
        const txt = document.createElement("label")
        const id = `lcnts::${this.id}`
        txt.id = id
        txt.innerText = this.getLabel()
        chk.id = id
        chk.type = "checkbox"
        chk.checked = this.getValue()
        chk.addEventListener("click", e => {
            e.preventDefault();
            this.setValue(!this.getValue())
        })
        this.onChange(v => chk.checked = v)

        div.appendChild(chk)
        div.appendChild(txt)
        return div
    }
}

globalThis.LCNSettingsSubcategory = class LCNSettingsSubcategory {

    #tab_id = null;
    #id = null;

    #fieldset = null;
    #legend = null;
    #label = null;

    static "for" (tab_id, id) {
        const domid = `lcnssc_${tab_id}_${id}`
        const inst = document.getElementById(domid)?.$LCNSettingsSubcategory
        if (inst == null) {
            const fieldset = document.createElement("fieldset")
            const legend = document.createElement("legend")
            fieldset.id = domid
            fieldset.appendChild(legend)

            // XXX: extend_tab only takes a string so this hacky workaround is used to let us use the regular dom api
            Options.extend_tab(tab_id, `<div id="__${domid}" hidden></div>`)
            const div = document.getElementById(`__${domid}`)?.parentElement
            assert.ok(div)

            div.replaceChildren(fieldset)
            return new this(tab_id, id, fieldset)
        } else {
            return inst
        }
    }

    "constructor" (tab_id, id, fieldset) {
        this.#tab_id = tab_id
        this.#id = id
        this.#fieldset = fieldset
        this.#legend = this.#fieldset.querySelector("legend")
        this.#fieldset.$LCNSettingsSubcategory = this
    }

    "getLabel" () { return this.#label; }
    "setLabel" (label) { this.#legend.innerText = this.#label = label; return this; }
    "addSetting" (setting) {
        assert.ok(setting instanceof LCNSetting)
        setting.__setIdPrefix(`lcnsetting_${this.#tab_id}_${this.#id}`)
        if (!setting.isHidden() && setting.__builtinDOMConstructor != null) {
            const div = setting.__builtinDOMConstructor()
            div.classList.add("lcn-setting-entry")
            this.#fieldset.appendChild(div)
        }

        return this
    }

}

$().ready(() => {
    LCNSite.INSTANCE = new LCNSite();

    for (const clazz of [ LCNPost, LCNPostInfo, LCNThread, LCNPostContainer, LCNPostWrapper ]) {
        clazz.allNodes = (node=document) => node.querySelectorAll(clazz.selector)
        clazz.all = (node=document) => Array.prototype.map.apply(clazz.allNodes(node), [ elem => clazz.assign(elem) ]);
        clazz.clear = (node=document) => Array.prototype.forEach.apply(clazz.allNodes(node), [ elem => elem[clazz.nodeAttrib] = null ])
        clazz.forEach = (fn, node=document) => clazz.allNodes(node).forEach(elem => fn(clazz.assign(elem)))
        clazz.filter = (fn, node=document) => clazz.all(node).filter(fn)
        clazz.find = fn => clazz.all().find(fn)
        clazz.first = (node=document) => clazz.assign(node.querySelector(clazz.selector))
        clazz.last = (node=document) => clazz.assign(Array.prototype.at.apply(clazz.allNodes(node), [ -1 ]))
    }

    // XXX: May be a cleaner way to do this but this should be fine for now.
    for (const clazz of [ LCNPostContainer, LCNPostWrapper, LCNThread, LCNPost ]) { void clazz.all(); }
    $(document).on("new_post", (e, post) => {
        if (LCNSite.INSTANCE.isModRecentsPage()) {
            void LCNPostWrapper.all()
        } else {
            void LCNPostContainer.all()
        }
    })

    $(window).on("focus", () => LCNSite.INSTANCE.clearUnseen())
    $(document.body).on("mousemove", () => LCNSite.INSTANCE.clearUnseen())
})