/*
* Copyright (c) 2025 Aldrik Ramaekers <aldrik.ramaekers@gmail.com>
* 
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
* 
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/

#include <GLFW/glfw3.h>
#include <imgui/imgui.h>
#include <IconFontCppHeaders/IconsFontAwesome5.h>

#include "ui.hpp"
#include "strops.hpp"
#include "config.hpp"
#include "locales.hpp"
#include "administration_writer.hpp"
#include "administration_reader.hpp"

#include <stb/stb_image.h>

int ui::load_image(const char* filename)
{
    int width, height, channels;
    unsigned char* data = stbi_load(filename, &width, &height, &channels, 0);
    
    if (!data)
    {
        return 0;
    }

    GLuint textureID;
    glGenTextures(1, &textureID);
    glBindTexture(GL_TEXTURE_2D, textureID);
    
    // Set texture parameters
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

    // Upload texture data
    GLenum format = (channels == 4) ? GL_RGBA : GL_RGB;
    glTexImage2D(GL_TEXTURE_2D, 0, format, width, height, 0, format, GL_UNSIGNED_BYTE, data);
    //glGenerateMipmap(GL_TEXTURE_2D);
    
    // Free image memory
    stbi_image_free(data);

    return textureID;
}

void ui::draw_setup()
{
    static int img = load_image("/home/aldrik/Projects/open-books/build/splash.png");
    ImVec2 area = ImGui::GetContentRegionAvail();
    
    ImGui::PushStyleVar(ImGuiStyleVar_ButtonTextAlign, ImVec2(0.0f, 0.5f));
    ImGui::PushStyleVar(ImGuiStyleVar_FramePadding, ImVec2(10.0f, 10.0f));

    ImGui::PushFont(ui::fontBig);
    const char* title = "OpenBooks";
    ImVec2 textSize = ImGui::CalcTextSize(title);
    ImGui::SetCursorPos(ImVec2((area.x - textSize.x) * 0.5f, 20));
    ImGui::Text(title);
    ImGui::PopFont();

    ImGui::Spacing();
    ImGui::Spacing();

    if (ImGui::Button(ICON_FA_FILE_IMPORT "  Load administration", ImVec2(area.x, 0))) { // @locale
        if (administration_reader::open_existing(NULL)) {
            ui::set_state(ui::main_state::UI_SETTINGS);
            ui::recreate_window_for_main_views();
        }
    }

    if (ImGui::Button(ICON_FA_FOLDER_PLUS "  Create administration", ImVec2(area.x, 0))) { // @locale
        if (administration_reader::open_existing(NULL)) {
            ui::set_state(ui::main_state::UI_SETTINGS);
            ui::recreate_window_for_main_views();
        }
    }
    ImGui::PopStyleVar();
    ImGui::PopStyleVar();

    char version_txt[100];
    strops::format(version_txt, sizeof(version_txt), "VERSION: %s %s", config::PROGRAM_VERSION, _DATE_);

    textSize = ImGui::CalcTextSize(version_txt);
    ImGui::SetCursorPos(ImVec2(5, area.y));

    ImGui::PushFont(ui::fontSmall);
    ImGui::Text(version_txt);
    ImGui::PopFont();

    int imageW = 150;
    int imageH = 150;
    ImGui::SetCursorScreenPos(ImVec2(area.x - imageW + 20, area.y - imageH + 20));
    ImGui::Image(img, ImVec2(imageW, imageH));
}

void ui::setup_setup()
{

}

void ui::destroy_setup()
{

}