#pragma once

#include <SDL3/SDL.h>

#include <cstdint>
#include <memory>
#include <string>
#include <unordered_map>

#include "core/rendering/sprite/sprite.hpp"
class Surface;

// Bitmap font amb suport UTF-8. Els glifs es guarden en una única graella
// al png, amb ample variable per caràcter i una tinta monocroma que es
// recolora al vol via Sprite::render(src, tgt).
class Text {
   public:
    struct Offset {
        int x{0};
        int y{0};
        int w{0};
    };

    struct File {
        int box_width{0};
        int box_height{0};
        int columns{16};
        int cell_spacing{0};
        int row_spacing{0};
        std::unordered_map<std::uint32_t, Offset> offset;
    };

    // Flags per a writeDX (composables amb |).
    static constexpr Uint8 COLOR_FLAG = 1;
    static constexpr Uint8 SHADOW_FLAG = 2;
    static constexpr Uint8 CENTER_FLAG = 4;
    static constexpr Uint8 STROKE_FLAG = 8;

    Text(const std::shared_ptr<Surface>& surface, const std::string& text_file);
    Text(const std::shared_ptr<Surface>& surface, const std::shared_ptr<File>& text_file);
    ~Text() = default;

    Text(const Text&) = delete;
    Text(Text&&) = delete;
    auto operator=(const Text&) -> Text& = delete;
    auto operator=(Text&&) -> Text& = delete;

    void write(int x, int y, const std::string& text, int kerning = 1, int length = -1);
    void writeColored(int x, int y, const std::string& text, Uint8 color, int kerning = 1, int length = -1);
    void writeShadowed(int x, int y, const std::string& text, Uint8 color, Uint8 shadow_distance = 1, int kerning = 1, int length = -1);
    void writeCentered(int x, int y, const std::string& text, int kerning = 1, int length = -1);
    void writeDX(Uint8 flags, int x, int y, const std::string& text, int kerning = 1, Uint8 text_color = 0, Uint8 shadow_distance = 1, Uint8 shadow_color = 0, int length = -1);

    [[nodiscard]] auto length(const std::string& text, int kerning = 1) const -> int;
    [[nodiscard]] auto getCharacterSize() const -> int { return box_width_; }
    [[nodiscard]] auto glyphWidth(std::uint32_t codepoint, int kerning = 0) const -> int;
    [[nodiscard]] auto getGlyphClip(std::uint32_t codepoint) const -> SDL_FRect;
    [[nodiscard]] auto getSprite() const -> Sprite* { return sprite_.get(); }

    static auto loadTextFile(const std::string& file_path) -> std::shared_ptr<File>;
    static auto codepointToUtf8(std::uint32_t cp) -> std::string;
    static auto nextCodepoint(const std::string& s, std::size_t& pos) -> std::uint32_t;

   private:
    std::unique_ptr<Sprite> sprite_;
    int box_width_{0};
    int box_height_{0};
    std::unordered_map<std::uint32_t, Offset> offset_;
};