#include "friendslist.hpp"
#include "abaddon.hpp"
#include "lazyimage.hpp"

using namespace std::string_literals;

FriendsList::FriendsList()
    : Gtk::Box(Gtk::ORIENTATION_VERTICAL)
    , m_filter_mode(FILTER_FRIENDS) {
    get_style_context()->add_class("friends-list");

    auto &discord = Abaddon::Get().GetDiscordClient();

    discord.signal_relationship_add().connect(sigc::mem_fun(*this, &FriendsList::OnRelationshipAdd));
    discord.signal_relationship_remove().connect(sigc::mem_fun(*this, &FriendsList::OnRelationshipRemove));

    PopulateRelationships();
    signal_map().connect(sigc::mem_fun(*this, &FriendsList::PopulateRelationships));

    constexpr static std::array<const char *, 4> strs = {
        "Friends",
        "Online",
        "Pending",
        "Blocked",
    };
    for (const auto &x : strs) {
        auto *btn = Gtk::manage(new Gtk::RadioButton(m_group, x));
        m_buttons.add(*btn);
        btn->show();
        btn->signal_toggled().connect([this, btn, str = x] {
            if (!btn->get_active()) return;
            switch (str[0]) { // hehe
                case 'F':
                    m_filter_mode = FILTER_FRIENDS;
                    break;
                case 'O':
                    m_filter_mode = FILTER_ONLINE;
                    break;
                case 'P':
                    m_filter_mode = FILTER_PENDING;
                    break;
                case 'B':
                    m_filter_mode = FILTER_BLOCKED;
                    break;
            }
            m_list.invalidate_filter();
        });
    }
    m_buttons.set_homogeneous(true);
    m_buttons.set_halign(Gtk::ALIGN_CENTER);

    m_add.set_halign(Gtk::ALIGN_CENTER);
    m_add.set_margin_top(5);
    m_add.set_margin_bottom(5);

    m_scroll.set_policy(Gtk::POLICY_AUTOMATIC, Gtk::POLICY_AUTOMATIC);

    m_list.set_sort_func(sigc::mem_fun(*this, &FriendsList::ListSortFunc));
    m_list.set_filter_func(sigc::mem_fun(*this, &FriendsList::ListFilterFunc));
    m_list.set_selection_mode(Gtk::SELECTION_NONE);
    m_list.set_hexpand(true);
    m_list.set_vexpand(true);
    m_scroll.add(m_list);
    add(m_add);
    add(m_buttons);
    add(m_scroll);

    m_add.show();
    m_scroll.show();
    m_buttons.show();
    m_list.show();
}

FriendsListFriendRow *FriendsList::MakeRow(const UserData &user, RelationshipType type) {
    auto *row = Gtk::manage(new FriendsListFriendRow(type, user));
    row->signal_action_remove().connect(sigc::bind(sigc::mem_fun(*this, &FriendsList::OnActionRemove), user.ID));
    row->signal_action_accept().connect(sigc::bind(sigc::mem_fun(*this, &FriendsList::OnActionAccept), user.ID));
    return row;
}

void FriendsList::OnRelationshipAdd(const RelationshipAddData &data) {
    for (auto *row_ : m_list.get_children()) {
        auto *row = dynamic_cast<FriendsListFriendRow *>(row_);
        if (row == nullptr || row->ID != data.ID) continue;
        delete row;
        break;
    }

    auto *row = MakeRow(data.User, data.Type);
    m_list.add(*row);
    row->show();
}

void FriendsList::OnRelationshipRemove(Snowflake id, RelationshipType type) {
    for (auto *row_ : m_list.get_children()) {
        auto *row = dynamic_cast<FriendsListFriendRow *>(row_);
        if (row == nullptr || row->ID != id) continue;
        delete row;
        return;
    }
}

void FriendsList::OnActionAccept(Snowflake id) {
    const auto cb = [this](DiscordError code) {
        if (code != DiscordError::NONE) {
            Gtk::MessageDialog dlg(*dynamic_cast<Gtk::Window *>(get_toplevel()), "Failed to accept", false, Gtk::MESSAGE_ERROR, Gtk::BUTTONS_OK, true);
            dlg.set_position(Gtk::WIN_POS_CENTER);
            dlg.run();
        }
    };
    Abaddon::Get().GetDiscordClient().PutRelationship(id, sigc::track_obj(cb, *this));
}

void FriendsList::OnActionRemove(Snowflake id) {
    auto &discord = Abaddon::Get().GetDiscordClient();
    const auto user = discord.GetUser(id);
    if (auto *window = dynamic_cast<Gtk::Window *>(get_toplevel())) {
        Glib::ustring str;
        switch (*discord.GetRelationship(id)) {
            case RelationshipType::Blocked:
                str = "Are you sure you want to unblock " + user->Username + "#" + user->Discriminator + "?";
                break;
            case RelationshipType::Friend:
                str = "Are you sure you want to remove " + user->Username + "#" + user->Discriminator + "?";
                break;
            case RelationshipType::PendingIncoming:
                str = "Are you sure you want to ignore " + user->Username + "#" + user->Discriminator + "?";
                break;
            case RelationshipType::PendingOutgoing:
                str = "Are you sure you want to cancel your request to " + user->Username + "#" + user->Discriminator + "?";
                break;
            default:
                break;
        }
        if (Abaddon::Get().ShowConfirm(str, window)) {
            const auto cb = [this, window](DiscordError code) {
                if (code == DiscordError::NONE) return;
                Gtk::MessageDialog dlg(*window, "Failed to remove user", false, Gtk::MESSAGE_ERROR, Gtk::BUTTONS_OK, true);
                dlg.set_position(Gtk::WIN_POS_CENTER);
                dlg.run();
            };
            discord.RemoveRelationship(id, sigc::track_obj(cb, *this));
        }
    }
}

void FriendsList::PopulateRelationships() {
    for (auto child : m_list.get_children())
        delete child;

    auto &discord = Abaddon::Get().GetDiscordClient();
    for (const auto &[id, type] : discord.GetRelationships()) {
        const auto user = discord.GetUser(id);
        if (!user.has_value()) continue;
        auto *row = MakeRow(*user, type);
        m_list.add(*row);
        row->show();
    }
}

int FriendsList::ListSortFunc(Gtk::ListBoxRow *a_, Gtk::ListBoxRow *b_) {
    auto *a = dynamic_cast<FriendsListFriendRow *>(a_);
    auto *b = dynamic_cast<FriendsListFriendRow *>(b_);
    if (a == nullptr || b == nullptr) return 0;
    return a->Name.compare(b->Name);
}

bool FriendsList::ListFilterFunc(Gtk::ListBoxRow *row_) {
    auto *row = dynamic_cast<FriendsListFriendRow *>(row_);
    if (row == nullptr) return false;
    switch (m_filter_mode) {
        case FILTER_FRIENDS:
            return row->Type == RelationshipType::Friend;
        case FILTER_ONLINE:
            return row->Type == RelationshipType::Friend && row->Status != PresenceStatus::Offline;
        case FILTER_PENDING:
            return row->Type == RelationshipType::PendingIncoming || row->Type == RelationshipType::PendingOutgoing;
        case FILTER_BLOCKED:
            return row->Type == RelationshipType::Blocked;
        default:
            return false;
    }
}

FriendsListAddComponent::FriendsListAddComponent()
    : Gtk::Box(Gtk::ORIENTATION_VERTICAL)
    , m_label("Add a Friend", Gtk::ALIGN_START)
    , m_status("", Gtk::ALIGN_START)
    , m_add("Add")
    , m_box(Gtk::ORIENTATION_HORIZONTAL) {
    m_box.add(m_entry);
    m_box.add(m_add);
    m_box.add(m_status);

    m_add.signal_clicked().connect(sigc::mem_fun(*this, &FriendsListAddComponent::Submit));

    m_label.set_halign(Gtk::ALIGN_CENTER);

    m_entry.set_placeholder_text("Enter a Username#1234");
    m_entry.signal_key_press_event().connect(sigc::mem_fun(*this, &FriendsListAddComponent::OnKeyPress), false);

    add(m_label);
    add(m_box);

    show_all_children();
}

void FriendsListAddComponent::Submit() {
    if (m_requesting) return;

    auto text = m_entry.get_text();
    m_label.set_text("Invalid input"); // cheeky !!
    m_entry.set_text("");
    const auto hashpos = text.find("#");
    if (hashpos == Glib::ustring::npos) return;
    const auto username = text.substr(0, hashpos);
    const auto discriminator = text.substr(hashpos + 1);
    if (username.size() == 0 || discriminator.size() != 4) return;
    if (discriminator.find_first_not_of("0123456789") != Glib::ustring::npos) return;

    m_requesting = true;
    m_label.set_text("Hang on...");

    const auto cb = [this](DiscordError code) {
        m_requesting = false;
        if (code == DiscordError::NONE) {
            m_label.set_text("Success!");
        } else {
            m_label.set_text("Failed: "s + GetDiscordErrorDisplayString(code));
        }
    };
    Abaddon::Get().GetDiscordClient().SendFriendRequest(username, std::stoul(discriminator), sigc::track_obj(cb, *this));
}

bool FriendsListAddComponent::OnKeyPress(GdkEventKey *e) {
    if (e->keyval == GDK_KEY_Return) {
        Submit();
        return true;
    }
    return false;
}

FriendsListFriendRow::FriendsListFriendRow(RelationshipType type, const UserData &data)
    : ID(data.ID)
    , Type(type)
    , Name(data.Username + "#" + data.Discriminator)
    , Status(Abaddon::Get().GetDiscordClient().GetUserStatus(data.ID))
    , m_accept("Accept") {
    auto *ev = Gtk::manage(new Gtk::EventBox);
    auto *box = Gtk::manage(new Gtk::Box(Gtk::ORIENTATION_HORIZONTAL));
    auto *img = Gtk::manage(new LazyImage(32, 32, true));
    auto *namebox = Gtk::manage(new Gtk::Box(Gtk::ORIENTATION_HORIZONTAL));
    auto *namelbl = Gtk::manage(new Gtk::Label("", Gtk::ALIGN_START));
    m_status_lbl = Gtk::manage(new Gtk::Label("", Gtk::ALIGN_START));
    auto *lblbox = Gtk::manage(new Gtk::Box(Gtk::ORIENTATION_VERTICAL));

    auto &discord = Abaddon::Get().GetDiscordClient();
    discord.signal_presence_update().connect(sigc::mem_fun(*this, &FriendsListFriendRow::OnPresenceUpdate));

    static bool show_animations = Abaddon::Get().GetSettings().GetShowAnimations();
    if (data.HasAnimatedAvatar() && show_animations) {
        img->SetAnimated(true);
        img->SetURL(data.GetAvatarURL("gif", "32"));
    } else {
        img->SetURL(data.GetAvatarURL("png", "32"));
    }

    namelbl->set_markup(data.GetEscapedBoldName());

    UpdatePresenceLabel();

    AddWidgetMenuHandler(ev, m_menu, [this] {
        m_accept.set_visible(Type == RelationshipType::PendingIncoming);

        switch (Type) {
            case RelationshipType::Blocked:
            case RelationshipType::Friend:
                m_remove.set_label("Remove");
                break;
            case RelationshipType::PendingIncoming:
                m_remove.set_label("Ignore");
                break;
            case RelationshipType::PendingOutgoing:
                m_remove.set_label("Cancel");
                break;
            default:
                break;
        }
    });

    m_remove.signal_activate().connect([this] {
        m_signal_remove.emit();
    });

    m_accept.signal_activate().connect([this] {
        m_signal_accept.emit();
    });

    m_menu.append(m_accept);
    m_menu.append(m_remove);
    m_menu.show_all();

    lblbox->set_valign(Gtk::ALIGN_CENTER);

    img->set_margin_end(5);

    namebox->add(*namelbl);
    lblbox->add(*namebox);
    lblbox->add(*m_status_lbl);

    box->add(*img);
    box->add(*lblbox);

    ev->add(*box);
    add(*ev);
    show_all_children();
}

void FriendsListFriendRow::UpdatePresenceLabel() {
    switch (Type) {
        case RelationshipType::PendingIncoming:
            m_status_lbl->set_text("Incoming Friend Request");
            break;
        case RelationshipType::PendingOutgoing:
            m_status_lbl->set_text("Outgoing Friend Request");
            break;
        default:
            m_status_lbl->set_text(GetPresenceDisplayString(Status));
            break;
    }
}

void FriendsListFriendRow::OnPresenceUpdate(const UserData &user, PresenceStatus status) {
    if (user.ID != ID) return;
    Status = status;
    UpdatePresenceLabel();
    changed();
}

FriendsListFriendRow::type_signal_remove FriendsListFriendRow::signal_action_remove() {
    return m_signal_remove;
}

FriendsListFriendRow::type_signal_accept FriendsListFriendRow::signal_action_accept() {
    return m_signal_accept;
}

FriendsListWindow::FriendsListWindow() {
    add(m_friends);
    set_default_size(500, 500);
    get_style_context()->add_class("app-window");
    get_style_context()->add_class("app-popup");
    m_friends.show();
}