#include "screens/info/ContactScreen.h"

#include "ui/theme/Theme.h"

#include <QDesktopServices>
#include <QEvent>
#include <QGridLayout>
#include <QHBoxLayout>
#include <QLabel>
#include <QPushButton>
#include <QScrollArea>
#include <QUrl>
#include <QVBoxLayout>

namespace fincept::screens {

using namespace fincept::ui;

// ── Style constants ──────────────────────────────────────────────────────────

static QString PANEL() {
    return QString("background: %1; border: 1px solid %2; border-radius: 2px;")
        .arg(colors::BG_SURFACE(), colors::BORDER_DIM());
}

static const char* MF = "font-family:'Consolas','Courier New',monospace;";

static QLabel* make_header(const QString& icon, const QString& title, const QString& icon_color) {
    auto* lbl = new QLabel(QString("%1  %2").arg(icon, title));
    lbl->setStyleSheet(QString("color: %1; font-size: 11px; font-weight: bold; letter-spacing: 0.5px; "
                               "background: %2; padding: 10px 14px; border-bottom: 1px solid %3; %4")
                           .arg(icon_color, colors::BG_RAISED(), colors::BORDER_DIM(), MF));
    return lbl;
}

static QWidget* make_contact_card(const QString& title, const QString& value, const QString& detail) {
    auto* card = new QWidget(nullptr);
    card->setStyleSheet(PANEL());
    auto* vl = new QVBoxLayout(card);
    vl->setContentsMargins(14, 12, 14, 12);
    vl->setSpacing(4);

    auto* t = new QLabel(title);
    t->setStyleSheet(QString("color: %1; font-size: 10px; font-weight: bold; "
                             "letter-spacing: 0.5px; background: transparent; %2")
                         .arg(colors::TEXT_SECONDARY(), MF));
    vl->addWidget(t);

    auto* v = new QLabel(value);
    v->setStyleSheet(QString("color: %1; font-size: 13px; font-weight: 600; background: transparent; %2")
                         .arg(colors::TEXT_PRIMARY(), MF));
    vl->addWidget(v);

    auto* d = new QLabel(detail);
    d->setStyleSheet(
        QString("color: %1; font-size: 11px; background: transparent; %2").arg(colors::TEXT_TERTIARY(), MF));
    d->setWordWrap(true);
    vl->addWidget(d);

    return card;
}

// ── Constructor ──────────────────────────────────────────────────────────────

ContactScreen::ContactScreen(QWidget* parent) : QWidget(parent) {
    setStyleSheet(QString("QWidget#ContactRoot { background: %1; }").arg(colors::BG_BASE()));
    setObjectName("ContactRoot");

    auto* root = new QVBoxLayout(this);
    root->setContentsMargins(0, 0, 0, 0);
    root->setSpacing(0);

    scroll_ = new QScrollArea;
    scroll_->setWidgetResizable(true);
    scroll_->setStyleSheet("QScrollArea { border: none; background: transparent; }");
    scroll_->setWidget(build_page());
    root->addWidget(scroll_, 1);
}

// ── Re-translation ────────────────────────────────────────────────────────────
// Static-content screen with no live state — on language change we rebuild
// the page from scratch rather than caching every label/button as a member.
// QScrollArea::setWidget() takes ownership and deletes the previous content.

void ContactScreen::changeEvent(QEvent* event) {
    if (event->type() == QEvent::LanguageChange && scroll_) {
        scroll_->setWidget(build_page());
    }
    QWidget::changeEvent(event);
}

// ── Page builder ──────────────────────────────────────────────────────────────

QWidget* ContactScreen::build_page() {
    auto* page = new QWidget(this);
    page->setStyleSheet(QString("background: %1;").arg(colors::BG_BASE()));
    auto* vl = new QVBoxLayout(page);
    vl->setContentsMargins(24, 24, 24, 24);
    vl->setSpacing(12);

    // ── Header ───────────────────────────────────────────────────────────────
    auto* back_btn = new QPushButton(tr("< BACK"));
    back_btn->setCursor(Qt::PointingHandCursor);
    back_btn->setStyleSheet(QString("QPushButton { color: %1; background: transparent; border: none; "
                                    "font-size: 12px; %2 } QPushButton:hover { color: %3; }")
                                .arg(colors::TEXT_SECONDARY(), MF, colors::TEXT_PRIMARY()));
    connect(back_btn, &QPushButton::clicked, this, &ContactScreen::navigate_back);
    vl->addWidget(back_btn, 0, Qt::AlignLeft);

    auto* title = new QLabel(tr("CONTACT US"));
    title->setStyleSheet(QString("color: %1; font-size: 20px; font-weight: 700; letter-spacing: 1px; "
                                 "background: transparent; %2")
                             .arg(colors::AMBER(), MF));
    vl->addWidget(title);

    auto* subtitle = new QLabel(tr("Get in touch with our team"));
    subtitle->setStyleSheet(
        QString("color: %1; font-size: 13px; background: transparent; %2").arg(colors::TEXT_TERTIARY(), MF));
    vl->addWidget(subtitle);

    vl->addSpacing(8);

    // ── Contact Information ──────────────────────────────────────────────────
    {
        auto* panel = new QWidget(this);
        panel->setStyleSheet(PANEL());
        auto* pvl = new QVBoxLayout(panel);
        pvl->setContentsMargins(0, 0, 0, 0);
        pvl->setSpacing(0);

        pvl->addWidget(make_header("@", tr("CONTACT INFORMATION"), colors::AMBER));

        auto* body = new QWidget(this);
        body->setStyleSheet("background: transparent;");
        auto* grid = new QGridLayout(body);
        grid->setContentsMargins(14, 12, 14, 12);
        grid->setSpacing(10);

        // Brand/contact values (email, handles, company name) are shown verbatim
        // — not translated.
        //
        // Only channels that actually exist are listed. The previous version
        // advertised a "+1-800-FINCEPT" phone line, staffed weekend support
        // hours, a "response within 4-6 hours" SLA and a New York office —
        // none of which are documented anywhere in this project. Publishing
        // unreachable contact details on a contact page is worse than
        // publishing none.
        grid->addWidget(
            make_contact_card(tr("EMAIL SUPPORT"), "support@fincept.in", tr("Primary support channel")), 0, 0);
        grid->addWidget(make_contact_card(tr("COMMUNITY"), "discord.gg/ae87a8ygbN", tr("Discussion and peer help")), 0,
                        1);
        grid->addWidget(make_contact_card(tr("ISSUE TRACKER"), "github.com/Fincept-Corporation/FinceptTerminal",
                                          tr("Bug reports and feature requests")),
                        1, 0);
        grid->addWidget(make_contact_card(tr("IN-APP TICKETS"), tr("Support tab"),
                                          tr("Open a tracked ticket from inside the terminal")),
                        1, 1);

        pvl->addWidget(body);
        vl->addWidget(panel);
    }

    // ── Quick Actions ────────────────────────────────────────────────────────
    {
        auto* panel = new QWidget(this);
        panel->setStyleSheet(PANEL());
        auto* pvl = new QVBoxLayout(panel);
        pvl->setContentsMargins(0, 0, 0, 0);
        pvl->setSpacing(0);

        pvl->addWidget(make_header(">>", tr("QUICK ACTIONS"), colors::CYAN));

        auto* body = new QWidget(this);
        body->setStyleSheet("background: transparent;");
        auto* hl = new QHBoxLayout(body);
        hl->setContentsMargins(14, 12, 14, 12);
        hl->setSpacing(10);

        auto make_action = [](const QString& text) {
            auto* btn = new QPushButton(text);
            btn->setFixedHeight(36);
            btn->setCursor(Qt::PointingHandCursor);
            btn->setStyleSheet(QString("QPushButton { background: %1; color: %2; border: 1px solid %3; "
                                       "border-radius: 2px; padding: 8px 16px; font-size: 12px; "
                                       "font-family:'Consolas','Courier New',monospace; }"
                                       "QPushButton:hover { background: %4; color: #38bdf8; }")
                                   .arg(colors::BG_RAISED(), colors::CYAN(), colors::BORDER_DIM(), colors::BG_HOVER()));
            return btn;
        };

        auto* email_btn = make_action(tr("Send Email"));
        email_btn->setAccessibleName(tr("Send an email to support"));
        connect(email_btn, &QPushButton::clicked, this,
                []() { QDesktopServices::openUrl(QUrl("mailto:support@fincept.in")); });
        hl->addWidget(email_btn);

        auto* discord_btn = make_action(tr("Join Discord"));
        discord_btn->setAccessibleName(tr("Open the Fincept Discord server"));
        connect(discord_btn, &QPushButton::clicked, this,
                []() { QDesktopServices::openUrl(QUrl("https://discord.gg/ae87a8ygbN")); });
        hl->addWidget(discord_btn);

        auto* github_btn = make_action(tr("GitHub Issues"));
        github_btn->setAccessibleName(tr("Open the GitHub issue tracker"));
        connect(github_btn, &QPushButton::clicked, this, []() {
            QDesktopServices::openUrl(QUrl("https://github.com/Fincept-Corporation/FinceptTerminal/issues"));
        });
        hl->addWidget(github_btn);

        hl->addStretch();
        setTabOrder(email_btn, discord_btn);
        setTabOrder(discord_btn, github_btn);
        pvl->addWidget(body);
        vl->addWidget(panel);
    }

    // ── Common Issues ────────────────────────────────────────────────────────
    {
        auto* panel = new QWidget(this);
        panel->setStyleSheet(PANEL());
        auto* pvl = new QVBoxLayout(panel);
        pvl->setContentsMargins(0, 0, 0, 0);
        pvl->setSpacing(0);

        pvl->addWidget(make_header("?", tr("COMMON ISSUES"), colors::AMBER));

        auto* body = new QWidget(this);
        body->setStyleSheet("background: transparent;");
        auto* bvl = new QVBoxLayout(body);
        bvl->setContentsMargins(14, 10, 14, 12);
        bvl->setSpacing(6);

        struct Issue {
            QString q;
            QString a;
        };
        const Issue issues[] = {
            {tr("Cannot log in or forgot password"),
             tr("Use the Forgot Password option on the login screen, or contact support@fincept.in")},
            {tr("Python setup fails or times out"),
             tr("Ensure you have a stable internet connection. Retry setup or check firewall settings.")},
            {tr("Data not loading or showing stale"),
             tr("Check your internet connection. Try refreshing the screen or restarting the terminal.")},
        };

        for (const auto& issue : issues) {
            auto* q = new QLabel(QString("> %1").arg(issue.q));
            q->setStyleSheet(QString("color: %1; font-size: 12px; font-weight: 600; background: transparent; %2")
                                 .arg(colors::TEXT_PRIMARY(), MF));
            bvl->addWidget(q);

            auto* a = new QLabel(QString("  %1").arg(issue.a));
            a->setWordWrap(true);
            a->setStyleSheet(
                QString("color: %1; font-size: 11px; background: transparent; %2").arg(colors::TEXT_TERTIARY(), MF));
            bvl->addWidget(a);
            bvl->addSpacing(4);
        }

        pvl->addWidget(body);
        vl->addWidget(panel);
    }

    vl->addStretch();
    return page;
}

} // namespace fincept::screens