#include "client/gui/BaseGUI.h"
#include "client/Game.h"
#include "client/input/Controller.h"
#include "client/rendering/Engine.h"
#include "rendering/Window.h"

static const Color4 INPUT_BACKGROUND(0x00, 0x00, 0x00, 0xA0);
static const Color4 INPUT_BACKGROUND_2(0x00, 0x00, 0x00, 0x80);
const Vector2 BaseGUI::FIXED_SIZE(400.0f, 300.0f);

BaseGUI::Base::Base() : hovered(false), pressed(false) {
}

void BaseGUI::tickBase(Base& b) {
    b.hovered =
        isIn(b.pos, b.size, Window::Controls::getMousePosition() / scale);
    b.pressed = b.hovered && Controller::wasReleased(Controller::leftClick);
}

void BaseGUI::tick() {
    if(Controller::wasReleased(Controller::leftClick)) {
        activeInput = -1;
    }
    for(Label& label : labels) {
        tickBase(label.base);
    }
    Window::Input::disable();
    int i = 0;
    for(Input& input : inputs) {
        tickBase(input.base);
        if(input.base.pressed) {
            Window::Input::fill(input.text);
            activeInput = i;
        }
        if(i == activeInput) {
            Window::Input::enable();
            input.text.clear();
            Window::Input::toString(input.text);
        }
        i++;
    }
    for(Button& button : buttons) {
        tickBase(button.base);
    }
}

void BaseGUI::updateScale() {
    const Size& size = Window::getSize();
    scale = static_cast<int>(
        std::min(size.width / FIXED_SIZE[0], size.height / FIXED_SIZE[1]));
    scale = scale < 1.0f ? 1.0f : scale;
    scaledSize = Vector2(size.width / scale, size.height / scale);
    Engine::matrix.scale(scale).update();
}

void BaseGUI::renderBase(const Base& base) {
    Engine::renderer.renderRectangle(base.pos, base.size,
                                     base.hovered ? INPUT_BACKGROUND_2
                                                  : INPUT_BACKGROUND);
}

void BaseGUI::renderLabels() {
    for(const Label& label : labels) {
        renderCenteredString(label.base, label.text);
    }
}

void BaseGUI::renderInputs() {
    int index = 0;
    for(Input& i : inputs) {
        Window::Input::setLimit(
            Engine::renderer.charsInSpace(i.base.size[0] - 20.0f));
        renderBase(i.base);
        StringBuffer<256> text(i.text);
        Vector2 pos = renderCenteredString(i.base, text);
        if(activeInput == index) {
            Vector2 c = Engine::renderer.getStringSize(
                text, Window::Input::getCursor());
            renderString(Vector2(pos[0] + c[0], pos[1] + 2.0f), "&292_");
            renderString(Vector2(pos[0] + c[0], pos[1] + 3.0f), "&292_");
        }
        index++;
    }
}

void BaseGUI::renderButtons() {
    for(const Button& button : buttons) {
        renderBase(button.base);
        renderCenteredString(button.base, button.text);
    }
}

void BaseGUI::render() {
    renderLabels();
    renderInputs();
    renderButtons();
}

Vector2 BaseGUI::round(const Vector2& v) const {
    return Vector2(static_cast<int>(v[0] * scale) / scale,
                   static_cast<int>(v[1] * scale) / scale);
}

void BaseGUI::renderString(const Vector2& pos, const char* s) {
    Engine::renderer.renderString(round(pos), s);
}

BaseGUI::Label& BaseGUI::addLabel(const char* text) {
    labels.add({Base(), text});
    return labels[labels.getLength() - 1];
}

BaseGUI::Input& BaseGUI::addInput() {
    inputs.add();
    return inputs[inputs.getLength() - 1];
}

BaseGUI::Button& BaseGUI::addButton(const char* text) {
    buttons.add({Base(), text});
    return buttons[buttons.getLength() - 1];
}

Vector2 BaseGUI::renderCenteredString(const Base& b, const char* text) {
    Vector2 pos =
        b.pos + (b.size - Engine::renderer.getStringSize(text)) * 0.5f;
    renderString(pos, text);
    return pos;
}

bool BaseGUI::isIn(const Vector2& pos, const Vector2& size,
                   const Vector2& point) const {
    Vector2 end = pos + size;
    return pos[0] <= point[0] && point[0] <= end[0] && pos[1] <= point[1] &&
           point[1] <= end[1];
}