#pragma once
// Paper-doll compositor for player sprites. Every body and item is a sheet of
// identical frame layout (3 direction rows x [standing, walk 0..3], 64 px
// cells) made of a recolorable shade layer plus fixed-color pixels, so any
// look is composed on the CPU in a few milliseconds without new art.
// Mirrors tools/character_compose.py.

#include "Appearance.h"

#include "hd2d/Texture.h"

#include <array>
#include <map>
#include <string>

namespace bs {

// Shade 1 (darkest) .. 4 (highlight) of a base color; matches ramp() in tools/character_compose.py.
std::array<uint32_t, 4> colorRamp(uint32_t rgb);

class CharacterArt {
public:
    bool load(const std::string& charDir, const CharacterManifest& manifest);
    // Full sprite sheet for a look (GL orientation, same layout as the source sheets).
    hd2d::Image compose(const Appearance& look) const;
    const CharacterManifest& manifest() const { return *manifest_; }

private:
    struct Layer {
        hd2d::Image shade, fixed;  // either may be empty
    };
    struct Body {
        hd2d::Image fixed;
        Layer skin;
        std::map<std::string, Layer> items;  // includes top_tee / bottom_shorts shade layers
    };
    std::map<std::string, Body> bodies_;
    const CharacterManifest* manifest_ = nullptr;
};

// Sheet layout helpers shared by players and NPCs.
struct SheetLayout {
    int cell = 64, framesPerDir = 5, walkFrames = 4;
    // Direction row for a facing relative to the camera; `flip` mirrors east into west.
    // relYaw: facing yaw minus camera yaw (0 = walking away from the camera).
    static int rowFor(float relYaw, bool& flip);
};

}  // namespace bs