/*
*   This file is part of Checkpoint
*   Copyright (C) 2017-2018 Bernardo Giordano
*
*   This program is free software: you can redistribute it and/or modify
*   it under the terms of the GNU General Public License as published by
*   the Free Software Foundation, either version 3 of the License, or
*   (at your option) any later version.
*
*   This program is distributed in the hope that it will be useful,
*   but WITHOUT ANY WARRANTY; without even the implied warranty of
*   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
*   GNU General Public License for more details.
*
*   You should have received a copy of the GNU General Public License
*   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*
*   Additional Terms 7.b and 7.c of GPLv3 apply to this file:
*       * Requiring preservation of specified reasonable legal notices or
*         author attributions in that material or in the Appropriate Legal
*         Notices displayed by works containing it.
*       * Prohibiting misrepresentation of the origin of that material,
*         or requiring that modified versions of such material be marked in
*         reasonable ways as different from the original version.
*/

#include "gui.hpp"

u8* framebuf;
u32 framebuf_width;

static Info* info;
static Clickable* buttonBackup;
static Clickable* buttonRestore;
static MessageBox* messageBox;
static MessageBox* copyList;
static Scrollable* backupList;

static const size_t rowlen = 5;
static const size_t collen = 4;
static const size_t cols = 6;
static bool backupScrollEnabled;
static Hid* hid;
static entryType_t type;

static float timer = 0;
static void drawSelector(void);
static int selectorX(size_t i);
static int selectorY(size_t i);

static char ver[8];

void Gui::entryType(entryType_t type_)
{
    type = type_;
}

void Gui::createInfo(const std::string& title, const std::string& message)
{
    info->init(title, message, 300, TYPE_INFO);
}

void Gui::createError(Result res, const std::string& message)
{
    info->init(res, message, 300, TYPE_ERROR);
}

size_t Gui::count(entryType_t type)
{
    return type == TITLES ? getTitleCount(g_currentUId) : backupList->size();
}

std::string Gui::nameFromCell(size_t index)
{
    return backupList->cellName(index);
}

void Gui::resetIndex(entryType_t type)
{
    if (type == TITLES)
    {
        hid->reset();
    }
    else
    {
        backupList->resetIndex();
    }
}

size_t Gui::index(entryType_t type)
{
    return type == TITLES ? hid->index() : backupList->index();
}

void Gui::index(entryType_t type, size_t i)
{
    if (type == TITLES)
    {
        hid->page(i / hid->maxVisibleEntries());
        hid->index(i - hid->page() * hid->maxVisibleEntries());
    }
    else
    {
        backupList->index(i);
    }
}

/// Multi selection

static std::vector<size_t> selEnt;

std::vector<size_t> Gui::selectedEntries(void)
{
    return selEnt;
}

bool Gui::multipleSelectionEnabled(void)
{
    return !selEnt.empty();
}

void Gui::clearSelectedEntries(void)
{
    selEnt.clear();
}

void Gui::addSelectedEntry(size_t idx)
{
    int existing = -1;
    for (size_t i = 0, sz = selEnt.size(); i < sz && existing == -1; i++)
    {
        if (selEnt.at(i) == idx)
        {
            existing = (int)i;
        }
    }
    
    if (existing == -1)
    {
        selEnt.push_back(idx);
    }
    else
    {
        selEnt.erase(selEnt.begin() + existing);
    }
}

/// Gui implementation

static void drawOutline(u32 x, u32 y, u16 w, u16 h, u8 size, color_t color)
{
    rectangled(x - size, y - size, w + 2*size, size, color); // top
    rectangled(x - size, y, size, h, color); // left
    rectangled(x + w, y, size, h, color); // right
    rectangled(x - size, y + h, w + 2*size, size, color); // bottom
}

static void drawBackground(void)
{
    framebuf = gfxGetFramebuffer(&framebuf_width, NULL);
    memset(framebuf, 51, gfxGetFramebufferSize());

    const u8 bar_height = 28;
    const u8 image_dim = 32;
    rectangle(0, 0, 1280, bar_height, COLOR_GREY_DARK);
    rectangle(0, 720 - bar_height, 1280, bar_height, COLOR_GREY_DARK);

    u32 ver_w, ver_h, checkpoint_w; 
    GetTextDimensions(5, ver, &ver_w, &ver_h);
    GetTextDimensions(6, "checkpoint", &checkpoint_w, NULL);
    u32 h = (bar_height - ver_h) / 2 - 1;
    DrawText(5, 10, h + 3, COLOR_GREY_LIGHT, DateTime::timeStr().c_str());
    DrawText(6, 1280 - 10 - ver_w - image_dim - 12 - checkpoint_w, h, COLOR_WHITE, "checkpoint");
    DrawText(5, 1280 - 10 - ver_w, h + 3, COLOR_GREY_LIGHT, ver);
    DrawImage(1280 - 10 - ver_w - image_dim - 6, -2, image_dim, image_dim, flag_bin, IMAGE_MODE_RGBA32); 
    // shadow
    rectangle(0, bar_height, 1280, 2, COLOR_GREY_DARKER);
}

void Gui::drawCopy(const std::string& src, u64 offset, u64 size)
{
    copyList->clear();
    copyList->push_message("Copying " + src);

    drawBackground();
    copyList->draw();
    
    static const int barHeight = 40;
    static const int progressBarHeight = 50;
    static const int spacingFromSides = 200;
    static const int spacingFromBars = 220 + (720 - barHeight * 2 - progressBarHeight) / 2;
    static const int width = 1280 - spacingFromSides * 2;
    
    rectangle(spacingFromSides - 2, barHeight + spacingFromBars - 2, width + 4, progressBarHeight + 4, COLOR_GREY_LIGHT);
    rectangle(spacingFromSides, barHeight + spacingFromBars, width, progressBarHeight, COLOR_WHITE);
    rectangle(spacingFromSides, barHeight + spacingFromBars, (float)offset / (float)size * width, progressBarHeight, MakeColor(116, 222, 126, 255));
    
    std::string sizeString = StringUtils::sizeString(offset) + " of " + StringUtils::sizeString(size);
    
    u32 textw, texth;
    GetTextDimensions(6, sizeString.c_str(), &textw, &texth);
    DrawText(6, ceilf((1280 - textw)/2), spacingFromBars + barHeight + (progressBarHeight - texth) / 2, COLOR_BLACK, sizeString.c_str());

    gfxFlushBuffers();
    gfxSwapBuffers();
    gfxWaitForVsync();
}

bool Gui::askForConfirmation(const std::string& text)
{
    bool ret = false;
    Clickable* buttonYes = new Clickable(293, 540, 200, 80, COLOR_WHITE, COLOR_BLACK, "Yes", true);
    Clickable* buttonNo = new Clickable(786, 540, 200, 80, COLOR_WHITE, COLOR_BLACK, "No", true);
    MessageBox* message = new MessageBox(COLOR_GREY_DARK, COLOR_WHITE);
    message->push_message(text);
    
    while(appletMainLoop() && !(buttonNo->released() || hidKeysDown(CONTROLLER_P1_AUTO) & KEY_B))
    {
        hidScanInput();
        if (buttonYes->released() || hidKeysDown(CONTROLLER_P1_AUTO) & KEY_A)
        {
            ret = true;
            break;
        }
        
        drawBackground();
        message->draw();

        drawOutline(293, 540, 200, 80, 4, COLOR_GREY_LIGHT);
        drawOutline(786, 540, 200, 80, 4, COLOR_GREY_LIGHT);
        buttonYes->draw();
        buttonNo->draw();

        gfxFlushBuffers();
        gfxSwapBuffers();
        gfxWaitForVsync();
    }
    
    delete message;
    delete buttonYes;
    delete buttonNo;
    return ret;
}

void Gui::init(void)
{
    gfxInitDefault();
    sprintf(ver, "v%d.%d.%d", VERSION_MAJOR, VERSION_MINOR, VERSION_MICRO);
    backupScrollEnabled = false;
    info = new Info();
    info->init("", "", 0, TYPE_INFO);
    hid = new Hid(rowlen * collen, collen);
    backupList = new Scrollable(540, 462, 506, 222, cols);
    buttonBackup = new Clickable(1050, 462, 220, 109, COLOR_WHITE, COLOR_GREY_LIGHT, "Backup [L]", true);
    buttonRestore = new Clickable(1050, 575, 220, 109, COLOR_WHITE, COLOR_GREY_LIGHT, "Restore [R]", true);
    copyList = new MessageBox(COLOR_GREY_DARK, COLOR_WHITE);
    messageBox = new MessageBox(COLOR_GREY_DARK, COLOR_WHITE);        
    messageBox->push_message("Press A to enter target.");
    messageBox->push_message("Press B to exit target or deselect all titles.");
    messageBox->push_message("Press L to backup target.");
    messageBox->push_message("Press R to restore target.");
    messageBox->push_message("Press X to delete a backup.");
    messageBox->push_message("Press Y to multiselect a title.");
    messageBox->push_message("Hold Y to multiselect all titles.");
    messageBox->push_message("Press the arrows to move between titles.");
    messageBox->push_message("Press ZL/ZR to switch user.");
}

void Gui::exit(void)
{
    delete info;
    delete hid;
    delete backupList;
    delete copyList;
    delete buttonBackup;
    delete buttonRestore;
    delete messageBox;
    gfxExit();
}

void Gui::draw(u128 uid)
{
    const u8 bar_height = 28;
    const u8 spacing = 4;
    const size_t entries = hid->maxVisibleEntries();
    const size_t max = hid->maxEntries(getTitleCount(g_currentUId)) + 1;

    // draw
    drawBackground();

    // user icons
    std::vector<u128> userIds = Account::ids();
    for (size_t i = 0; i < userIds.size(); i++)
    {
        if (Account::icon(userIds.at(i)) != NULL)
        {
            DrawImage(1280 - (spacing + USER_ICON_SIZE) * (i + 1), bar_height + spacing, USER_ICON_SIZE, USER_ICON_SIZE, Account::icon(userIds.at(i)), IMAGE_MODE_RGB24);
        }
    }

    // title icons
    for (size_t k = hid->page()*entries; k < hid->page()*entries + max; k++)
    {
        int selectorx = selectorX(k);
        int selectory = selectorY(k);
        if (smallIcon(g_currentUId, k) != NULL)
        {
            DrawImage(selectorx, selectory, 128, 128, smallIcon(g_currentUId, k), IMAGE_MODE_RGB24);
        }
        else
        {
            reloadSmallIcon(g_currentUId, k);
            rectangle(selectorx, selectory, 128, 128, COLOR_WHITE);
        }

        if (!selEnt.empty() && std::find(selEnt.begin(), selEnt.end(), k) != selEnt.end())
        {
            //rectangle(selectorx + 94, selectory + 94, 24, 24, COLOR_WHITE);
            DrawImage(selectorx + 86, selectory + 86, 40, 40, checkbox_black_bin, IMAGE_MODE_RGBA32); 
        }
    }

    // title selector
    if (getTitleCount(g_currentUId) > 0)
    {
        drawSelector();
    }

    if (getTitleCount(g_currentUId) > 0)
    {
        Title title;
        getTitle(title, g_currentUId, hid->fullIndex());
        
        backupList->flush();
        std::vector<std::string> dirs = title.saves();
        
        for (size_t i = 0; i < dirs.size(); i++)
        {
            backupList->push_back(COLOR_WHITE, backupScrollEnabled ? COLOR_BLUE : COLOR_GREY_LIGHT, dirs.at(i));
            if (i == backupList->index())
            {
                backupList->invertCellColors(i);
            }
        }

        if (title.icon() != NULL)
        {
            drawOutline(1016, 157, 256, 256, 4, COLOR_BLACK);
            DrawImage(1016, 157, 256, 256, title.icon(), IMAGE_MODE_RGB24);
        }

        drawOutline(540, 462, 730, 222, 4, COLOR_GREY_LIGHT);
        rectangled(1046, 462, 4, 222, COLOR_GREY_LIGHT);
        rectangled(1048, 571, 222, 4, COLOR_GREY_LIGHT);
        backupList->draw();
        buttonBackup->draw();
        buttonRestore->draw();
    }

    info->draw();
    
    if (hidKeysHeld(CONTROLLER_P1_AUTO) & KEY_MINUS)
    {
        messageBox->draw();
    }

    u32 ins_w, ins_h;
    const char* instructions = "Hold - to see commands. Press + to exit.";
    GetTextDimensions(5, instructions, &ins_w, &ins_h);
    DrawText(5, ceil((1280 - ins_w) / 2), 720 - bar_height + (bar_height - ins_h) / 2, COLOR_WHITE, instructions);

    // increase timer
    timer += 0.05f;
    
    gfxFlushBuffers();
    gfxSwapBuffers();
    gfxWaitForVsync();
}

bool Gui::isBackupReleased(void)
{
    return buttonBackup->released() && backupScrollEnabled;
}

bool Gui::isRestoreReleased(void)
{
    return buttonRestore->released() && backupScrollEnabled;
}

bool Gui::backupScroll(void)
{
    return backupScrollEnabled;
}

void Gui::backupScroll(bool enable)
{
    backupScrollEnabled = enable;
}

void Gui::updateButtonsColor(void)
{
    if (backupScrollEnabled)
    {
        buttonBackup->setColors(COLOR_WHITE, COLOR_BLACK);
        buttonRestore->setColors(COLOR_WHITE, COLOR_BLACK);
    }
    else
    {
        buttonBackup->setColors(COLOR_WHITE, COLOR_GREY_LIGHT);
        buttonRestore->setColors(COLOR_WHITE, COLOR_GREY_LIGHT);		
    }
}

void Gui::updateSelector(void)
{
    if (!backupScrollEnabled)
    {
        hid->update(getTitleCount(g_currentUId));
        backupList->resetIndex();
    }
    else
    {
        backupList->updateSelection();
    }
}

static void drawSelector(void)
{
    static const int sz = 124;
    static const int w = 4;
    const int x = selectorX(hid->index()) + w/2;
    const int y = selectorY(hid->index()) + w/2;

    float highlight_multiplier = fmax(0.0, fabs(fmod(timer, 1.0) - 0.5) / 0.5);
    color_t color = COLOR_BLUE;
    color = MakeColor(color.r + (255 - color.r) * highlight_multiplier, color.g + (255 - color.g) * highlight_multiplier, color.b + (255 - color.b) * highlight_multiplier, 255);    
    
    drawOutline(x, y, sz, sz, w, color);
}

static int selectorX(size_t i)
{
    return 128*((i % (rowlen*collen)) % collen) + 4 * (((i % (rowlen*collen)) % collen) + 1);
}

static int selectorY(size_t i)
{
    return 28 + 128*((i % (rowlen*collen)) / collen) + 4 * (((i % (rowlen*collen)) / collen) + 1);
}