#pragma once

#include <array>
#include <glm/vec2.hpp>
#include <glm/vec4.hpp>

#include "commons.hpp"
#include "typedefs.hpp"

class Window;
class Batch2D;
class Framebuffer;

class DrawContext {
    Window& window;
    const DrawContext* parent;
    glm::uvec2 viewport;
    Batch2D* g2d;
    Flushable* flushable = nullptr;
    Bindable* fbo = nullptr;
    bool depthMask = true;
    bool depthTest = false;
    bool cullFace = false;
    BlendMode blendMode = BlendMode::normal;
    int scissorsCount = 0;
    float lineWidth = 1.0f;
    float uiScale = 1.0f;
    std::array<const Bindable*, advanced_pipeline::TARGETS_COUNT> textures {};
public:
    DrawContext(
        const DrawContext* parent,
        Window& window,
        Batch2D* g2d
    );
    ~DrawContext();
    
    Batch2D* getBatch2D() const;
    
    const glm::uvec2& getViewport() const;
    [[nodiscard]] DrawContext sub(Flushable* flushable=nullptr) const;

    void setViewport(const glm::uvec2& viewport);
    void setFramebuffer(Bindable* fbo);
    void setDepthMask(bool flag);
    void setDepthTest(bool flag);
    void setCullFace(bool flag);
    void setBlendMode(BlendMode mode);
    void setScissors(const glm::vec4& area);
    void setLineWidth(float width);

    /// @brief Set scale of UI coordinates (UI units -> window pixels).
    /// Affects setScissors only
    void setUiScale(float scale);
    void useTexture(int target, const Bindable* texture);
};