#include "core/input/global_inputs.hpp"

#include <string>

#include "core/input/input.h"
#include "core/locale/lang.h"
#include "core/rendering/screen.h"
#include "core/resources/resource.h"
#include "core/resources/skin_manager.hpp"
#include "game/options.hpp"
#include "utils/utils.h"

namespace GlobalInputs {

    namespace {
        // Índexs de Lang per a les notificacions de hotkey
        constexpr int LANG_ZOOM = 96;
        constexpr int LANG_FULLSCREEN = 97;
        constexpr int LANG_WINDOW = 98;
        constexpr int LANG_SHADER = 99;
        constexpr int LANG_PRESET = 100;
        constexpr int LANG_EXIT_CONFIRM = 101;
        constexpr int LANG_SKIN = 102;

        constexpr Uint32 NOTIFY_MS = 1500;
        constexpr Uint32 EXIT_CONFIRM_MS = 2000;
        const Color BLACK = {0x00, 0x00, 0x00};
        const Color CYAN = {0x00, 0xFF, 0xFF};
        const Color YELLOW = {0xFF, 0xE0, 0x40};
        const Color MAGENTA = {0xFF, 0x00, 0xFF};
        const Color GREEN = {0x00, 0xFF, 0x80};
        const Color RED = {0xFF, 0x40, 0x40};

        // Patró de doble pulsació: la primera pulsació d'EXIT mostra una
        // notificació en vermell i obre una finestra de confirmació; una
        // segona pulsació dins la finestra activa `quit_requested`. La
        // finestra coincideix amb la durada del missatge perquè usuari i
        // sistema sempre estiguin sincronitzats.
        Uint32 exit_window_until_ticks = 0;
        bool quit_requested = false;

        void notifyZoom() {
            const std::string MSG = Lang::get()->getText(LANG_ZOOM) + " " + std::to_string(Options::window.zoom) + "x";
            Screen::get()->notify(MSG, YELLOW, BLACK, NOTIFY_MS);
        }

        void notifyFullscreen() {
            const int IDX = Options::video.fullscreen ? LANG_FULLSCREEN : LANG_WINDOW;
            Screen::get()->notify(Lang::get()->getText(IDX), YELLOW, BLACK, NOTIFY_MS);
        }

        void notifyShaderEnabled() {
            const std::string STATE = Screen::isShaderEnabled() ? "ON" : "OFF";
            const std::string MSG = Lang::get()->getText(LANG_SHADER) + " " + STATE;
            Screen::get()->notify(MSG, CYAN, BLACK, NOTIFY_MS);
        }

        void notifyShaderType() {
            const bool IS_CRTPI = Options::video.shader.current_shader == Rendering::ShaderType::CRTPI;
            const std::string MSG = Lang::get()->getText(LANG_SHADER) + " " + (IS_CRTPI ? "CRTPI" : "POSTFX");
            Screen::get()->notify(MSG, MAGENTA, BLACK, NOTIFY_MS);
        }

        void notifyPreset() {
            const std::string MSG = Lang::get()->getText(LANG_PRESET) + " " + Screen::get()->getCurrentPresetName();
            Screen::get()->notify(MSG, GREEN, BLACK, NOTIFY_MS);
        }

        void notifySkin() {
            const std::string MSG = Lang::get()->getText(LANG_SKIN) + " " + SkinManager::get()->currentDisplayName();
            Screen::get()->notify(MSG, CYAN, BLACK, NOTIFY_MS);
        }

        void onExit() {
            const Uint32 NOW = SDL_GetTicks();
            if (NOW < exit_window_until_ticks) {
                quit_requested = true;
                return;
            }
            exit_window_until_ticks = NOW + EXIT_CONFIRM_MS;
            Screen::get()->notify(Lang::get()->getText(LANG_EXIT_CONFIRM), RED, BLACK, EXIT_CONFIRM_MS);
        }
    }  // namespace

    auto handle() -> bool {
        if (Screen::get() == nullptr || Input::get() == nullptr) { return false; }

        if (Input::get()->checkInput(Input::Action::EXIT, Input::Repeat::OFF)) {
            onExit();
            return true;
        }
        if (Input::get()->checkInput(Input::Action::WINDOW_FULLSCREEN, Input::Repeat::OFF)) {
            Screen::get()->toggleVideoMode();
            notifyFullscreen();
            return true;
        }
        if (Input::get()->checkInput(Input::Action::WINDOW_DEC_ZOOM, Input::Repeat::OFF)) {
            if (Screen::get()->decWindowZoom()) {
                notifyZoom();
            }
            return true;
        }
        if (Input::get()->checkInput(Input::Action::WINDOW_INC_ZOOM, Input::Repeat::OFF)) {
            if (Screen::get()->incWindowZoom()) {
                notifyZoom();
            }
            return true;
        }
        if (Input::get()->checkInput(Input::Action::TOGGLE_SHADER, Input::Repeat::OFF)) {
            Screen::get()->toggleShaderEnabled();
            notifyShaderEnabled();
            return true;
        }
        // F5/F6 només actuen quan el post-procesado està actiu.
        if (Screen::isShaderEnabled()) {
            if (Input::get()->checkInput(Input::Action::TOGGLE_SHADER_TYPE, Input::Repeat::OFF)) {
                Screen::get()->toggleActiveShader();
                notifyShaderType();
                return true;
            }
            if (Input::get()->checkInput(Input::Action::NEXT_SHADER_PRESET, Input::Repeat::OFF)) {
                if (Screen::get()->nextPreset()) {
                    notifyPreset();
                }
                return true;
            }
        }
        if (Input::get()->checkInput(Input::Action::NEXT_SKIN, Input::Repeat::OFF)) {
            const std::string NEXT_ID = SkinManager::get()->nextSkinId();
            if (NEXT_ID != SkinManager::get()->current()) {
                Resource::get()->reloadForSkin(NEXT_ID);
            }
            notifySkin();
            return true;
        }
        return false;
    }

    auto wantsQuit() -> bool {
        return quit_requested;
    }

}  // namespace GlobalInputs