/*

Dwarf Therapist

Copyright (c) 2009 Trey Stout (chmod)



Permission is hereby granted, free of charge, to any person obtaining a copy

of this software and associated documentation files (the "Software"), to deal

in the Software without restriction, including without limitation the rights

to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

copies of the Software, and to permit persons to whom the Software is

furnished to do so, subject to the following conditions:



The above copyright notice and this permission notice shall be included in

all copies or substantial portions of the Software.



THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

THE SOFTWARE.

*/

#include "viewmanager.h"

#include "statetableview.h"

#include "dwarfmodel.h"

#include "dwarfmodelproxy.h"

#include "gridview.h"

#include "defines.h"

#include "truncatingfilelogger.h"

#include "dwarftherapist.h"

#include "viewcolumnset.h"

#include "viewcolumn.h"

#include "utils.h"



ViewManager::ViewManager(DwarfModel *dm, DwarfModelProxy *proxy,

                         QWidget *parent)

    : QTabWidget(parent)

    , m_model(dm)

    , m_proxy(proxy)

    , m_add_tab_button(new QToolButton(this))

{

    m_proxy->setSourceModel(m_model);

    setTabsClosable(true);

    setMovable(true);

#ifdef Q_WS_MAC

    setStyleSheet("QTabWidget::tab-bar { alignment: left; left: -4px; }");

#endif

    reload_views();



    m_add_tab_button->setIcon(QIcon(":img/tab_add.png"));

    m_add_tab_button->setPopupMode(QToolButton::InstantPopup);

    m_add_tab_button->setToolButtonStyle(Qt::ToolButtonIconOnly);

    draw_add_tab_button();

    setCornerWidget(m_add_tab_button, Qt::TopLeftCorner);



    connect(tabBar(), SIGNAL(tabMoved(int, int)), SLOT(write_views()));

    connect(tabBar(), SIGNAL(currentChanged(int)), SLOT(setCurrentIndex(int)));

    connect(this, SIGNAL(tabCloseRequested(int)),

            SLOT(remove_tab_for_gridview(int)));

    connect(m_model, SIGNAL(need_redraw()), SLOT(redraw_current_tab()));



    draw_views();

}



void ViewManager::draw_add_tab_button() {

    QIcon icn(":img/tab_add.png");

    QMenu *m = new QMenu(this);

    foreach(GridView *v, m_views) {

        QAction *a = m->addAction(icn, "Add " + v->name(), this,

                                  SLOT(add_tab_from_action()));

        a->setData((qulonglong)v);

    }

    m_add_tab_button->setMenu(m);

}



void ViewManager::reload_views() {

    m_views.clear();



    QSettings *s = new QSettings(

            ":config/default_gridviews", QSettings::IniFormat);



    int total_views = s->beginReadArray("gridviews");

    QList<GridView*> built_in_views;

    for (int i = 0; i < total_views; ++i) {

        s->setArrayIndex(i);

        GridView *gv = GridView::read_from_ini(*s, this);

        gv->set_is_custom(false); // this is a default view

        m_views << gv;

        built_in_views << gv;

    }

    s->endArray();



    // now read any gridviews out of the user's settings

    s = DT->user_settings();

    total_views = s->beginReadArray("gridviews");

    for (int i = 0; i < total_views; ++i) {

        s->setArrayIndex(i);

        GridView *gv = GridView::read_from_ini(*s, this);

        bool name_taken = true;

        do {

            name_taken = false;

            foreach(GridView *built_in, built_in_views) {

                if (gv->name() == built_in->name()) {

                    name_taken = true;

                    break;

                }

            }

            if (name_taken) {

                QMessageBox::information(this, tr("Name in Use!"),

                    tr("A custom view was found in your settings called '%1.' "

                    "However, this name is already taken by a built-in view, "

                    "you must rename the custom view.").arg(gv->name()));

                QString new_name;

                while (new_name.isEmpty() || new_name == gv->name()) {

                    new_name = QInputDialog::getText(this, tr("Rename View"),

                                    tr("New name for '%1'").arg(gv->name()));

                }

                gv->set_name(new_name);

            }

        } while(name_taken);





        gv->set_is_custom(true); // this came from a user's settings

        m_views << gv;

    }

    s->endArray();



    LOGI << "Loaded" << m_views.size() << "views from disk";

    draw_add_tab_button();

}



void ViewManager::draw_views() {

    // see if we have a saved tab order...

    QTime start = QTime::currentTime();

    int idx = currentIndex();

    while (count()) {

        QWidget *w = widget(0);

        w->deleteLater();

        removeTab(0);

    }

    QStringList tab_order = DT->user_settings()->value(

            "gui_options/tab_order").toStringList();

    if (tab_order.size() == 0) {

        tab_order << "Labors" << "Military" << "Social";

    }

    if (tab_order.size() > 0) {

        foreach(QString name, tab_order) {

            foreach(GridView *v, m_views) {

                if (v->name() == name)

                    add_tab_for_gridview(v);

            }

        }

    }

    if (idx >= 0 && idx <= count() - 1) {

        setCurrentIndex(idx);

    } else {

        setCurrentIndex(0);

    }

    QTime stop = QTime::currentTime();

    LOGD << QString("redrew views in %L1ms").arg(start.msecsTo(stop));

}



void ViewManager::write_tab_order() {

    QStringList tab_order;

    for (int i = 0; i < count(); ++i) {

        tab_order << tabText(i);

    }

    DT->user_settings()->setValue("gui_options/tab_order", tab_order);

}



void ViewManager::write_views() {

    QSettings *s = DT->user_settings();

    s->remove("gridviews"); // look at us, taking chances like this!



    // find all custom gridviews...

    QList<GridView*> custom_views;

    foreach(GridView *gv, m_views) {

        if (gv->is_custom())

            custom_views << gv;

    }



    s->beginWriteArray("gridviews", custom_views.size());

    int i = 0;

    foreach(GridView *gv, custom_views) {

        s->setArrayIndex(i++);

        gv->write_to_ini(*s);

    }

    s->endArray();

    write_tab_order();

}



void ViewManager::add_view(GridView *view) {

    view->re_parent(this);

    m_views << view;

    write_views();

    draw_add_tab_button();

    add_tab_for_gridview(view);

}



GridView *ViewManager::get_view(const QString &name) {

    GridView *retval = 0;

    foreach(GridView *view, m_views) {

        if (name == view->name()) {

            retval = view;

            break;

        }

    }

    return retval;

}



GridView *ViewManager::get_active_view() {

    GridView *retval = 0;

    foreach(GridView *view, m_views) {

        if (view->name() == tabText(currentIndex())) {

            retval = view;

            break;

        }

    }

    return retval;

}



void ViewManager::remove_view(GridView *view) {

    m_views.removeAll(view);

    for (int i = 0; i < count(); ++i) {

        if (tabText(i) == view->name())

            removeTab(i);

    }

    write_views();

    draw_add_tab_button();

    view->deleteLater();

}



void ViewManager::replace_view(GridView *old_view, GridView *new_view) {

    // if the current tab was updated, we need to redraw it

    bool update_current_index = false;

    for (int i = 0; i < count(); ++i) {

        if (tabText(i) == old_view->name()) {

            // update tab titles that were showing the old view

            setTabText(i, new_view->name());

            // going to have to redraw the active tab as its view was just

            // updated

            if (i == currentIndex())

                update_current_index = true;

        }

    }

    m_views.removeAll(old_view);

    m_views.append(new_view);

    write_views();

    draw_add_tab_button();



    if (update_current_index) {

        setCurrentIndex(currentIndex());

    }

}



StateTableView *ViewManager::get_stv(int idx) {

    if (idx == -1)

        idx = currentIndex();

    QWidget *w = widget(idx);

    if (w) {

        return qobject_cast<StateTableView*>(w);

    }

    return 0;

}



void ViewManager::setCurrentIndex(int idx) {

    if (idx < 0 || idx > count()-1) {

        LOGW << "tab switch to index" << idx << "requested but there are " <<

            "only" << count() << "tabs";

        return;

    }

    StateTableView *stv = get_stv(idx);

    foreach(GridView *v, m_views) {

        if (v->name() == tabText(idx)) {

            m_model->set_grid_view(v);

            m_model->build_rows();

            stv->header()->setResizeMode(QHeaderView::Fixed);

            stv->header()->setResizeMode(0, QHeaderView::ResizeToContents);

            stv->sortByColumn(0, Qt::AscendingOrder);

            QList<Dwarf*> tmp_list;

            foreach(Dwarf *d, m_selected_dwarfs) {

                tmp_list << d;

            }

            foreach(Dwarf *d, tmp_list) {

                stv->select_dwarf(d);

            }

            break;

        }

    }

    tabBar()->setCurrentIndex(idx);

    stv->restore_expanded_items();

    write_tab_order();

}



void ViewManager::dwarf_selection_changed(const QItemSelection &selected,

                                          const QItemSelection &deselected) {

    Q_UNUSED(selected);

    Q_UNUSED(deselected);

    QItemSelectionModel *selection = qobject_cast<QItemSelectionModel*>

                                     (QObject::sender());

    m_selected_dwarfs.clear();

    foreach(QModelIndex idx, selection->selectedRows(0)) {

        int dwarf_id = idx.data(DwarfModel::DR_ID).toInt();

        Dwarf *d = DT->get_dwarf_by_id(dwarf_id);

        if (d)

            m_selected_dwarfs << d;

    }

}



int ViewManager::add_tab_from_action() {

    QAction *a = qobject_cast<QAction*>(QObject::sender());

    if (!a)

        return -1;



    GridView *v = (GridView*)(a->data().toULongLong());

    int idx = add_tab_for_gridview(v);

    setCurrentIndex(idx);

    return idx;

}



int ViewManager::add_tab_for_gridview(GridView *v) {

    v->set_active(true);

    StateTableView *stv = new StateTableView(this);

    stv->setSortingEnabled(false);

    stv->set_model(m_model, m_proxy);

    stv->setSortingEnabled(true);

    connect(stv, SIGNAL(dwarf_focus_changed(Dwarf*)),

            SIGNAL(dwarf_focus_changed(Dwarf*))); // pass-thru

    connect(stv->selectionModel(),

            SIGNAL(selectionChanged(const QItemSelection &,

                                    const QItemSelection &)),

            SLOT(dwarf_selection_changed(const QItemSelection &,

                                         const QItemSelection &)));

    stv->show();

    int new_idx = addTab(stv, v->name());

    write_tab_order();

    return new_idx;

}



void ViewManager::remove_tab_for_gridview(int idx) {

    if (count() < 2) {

        QMessageBox::warning(this, tr("Can't Remove Tab"),

            tr("Cannot remove the last tab!"));

        return;

    }

    foreach(GridView *v, m_views) {

        if (v->name() == tabText(idx)) {

            // find out if there are other dupes of this view still active...

            int active = 0;

            for(int i = 0; i < count(); ++i) {

                if (tabText(i) == v->name()) {

                    active++;

                }

            }

            if (active < 2)

                v->set_active(false);

        }

    }

    widget(idx)->deleteLater();

    removeTab(idx);

    write_tab_order();

}



void ViewManager::expand_all() {

    StateTableView *stv = get_stv();

    if (stv)

        stv->expandAll();

}



void ViewManager::collapse_all() {

    StateTableView *stv = get_stv();

    if (stv)

        stv->collapseAll();

}



void ViewManager::jump_to_dwarf(QTreeWidgetItem *current,

                                QTreeWidgetItem *previous) {

    StateTableView *stv = get_stv();

    if (stv)

        stv->jump_to_dwarf(current, previous);

}



void ViewManager::jump_to_profession(QListWidgetItem *current,

                                     QListWidgetItem *previous) {

    StateTableView *stv = get_stv();

    if (stv)

        stv->jump_to_profession(current, previous);

}



void ViewManager::set_group_by(int group_by) {

    if (m_model)

        m_model->set_group_by(group_by);

    redraw_current_tab();

}



void ViewManager::redraw_current_tab() {

    setCurrentIndex(currentIndex());

}