// .msenv（首行 `ScriptType EnvrionmentData` —— 原格式拼写错误，照收）。
// 文本，`Group NAME { ... }` + `List NAME { ... }`（匿名 rgba 行）。SHINSOO §5.5。
// 真值：ETC/ymir work/environment/*.msenv 实测 + EterLib 环境类。W5 用。
#pragma once
#include <array>
#include <string>
#include <vector>

namespace fmt {

using Rgba = std::array<float, 4>;
using Vec3f = std::array<float, 3>;
using Vec2f = std::array<float, 2>;

struct EnvDirLight {
    Vec3f direction{{0.5f, 0.5f, -0.5f}};
    bool  bg_enable = false, ch_enable = false;
    Rgba  bg_diffuse{{1, 1, 1, 1}}, bg_ambient{{0.5f, 0.5f, 0.5f, 1}};
    Rgba  ch_diffuse{{1, 1, 1, 1}}, ch_ambient{{0.5f, 0.5f, 0.5f, 1}};
};
struct EnvMaterial {
    Rgba diffuse{{0.8f, 0.8f, 0.8f, 1}}, ambient{{0.8f, 0.8f, 0.8f, 1}},
            emissive{{0.8f, 0.8f, 0.8f, 1}};
};
struct EnvFog {
    // 两种写法：老版 `Enable`/`NearDistance`/`FarDistance`；A1 实盘用 `foglevel`（0=关，>0=开）。
    bool  enable = false;            // Enable != 0 || fog_level > 0
    bool  density_fog = false;       // IsDensity（参考端保留，当前 Godot 用深度雾）
    int   fog_level = 0;             // foglevel
    float near_distance = 25600.0f * 0.5f, far_distance = 25600.0f * 0.7f;
    Rgba  color{{0.5f, 0.5f, 0.5f, 1}};
};
struct EnvFilter {
    bool enable = false;
    Rgba color{{0.3f, 0.1f, 0.1f, 0}};
    int alpha_src = 1;                // D3DBLEND_ONE
    int alpha_dest = 1;               // D3DBLEND_ONE
};
struct EnvSkyBox {
    Vec3f scale{{3500, 3500, 3500}};
    bool texture_render_mode = false;
    int   gradient_level_upper = 0, gradient_level_lower = 0;
    std::array<std::string, 6> face_textures{}; // front/back/left/right/top/bottom
    Vec2f cloud_scale{{200000, 200000}}, cloud_texture_scale{{4, 4}}, cloud_speed{{0.001f, 0.001f}};
    float cloud_height = 30000;
    std::string cloud_texture;
    std::vector<Rgba> cloud_color;   // List CloudColor
    std::vector<Rgba> gradient;      // List Gradient（成对 = 一段渐变的上下色）
};
struct EnvLensFlare {
    bool  enable = false, main_flare_enable = false;
    Rgba  brightness_color{{1, 1, 1, 1}};
    float max_brightness = 1, main_flare_size = 0.2f;
    std::string main_flare_texture;
};

struct Environment {
    std::string script_type;   // "EnvrionmentData"
    float script_version = 0;
    EnvDirLight   dir_light;
    EnvMaterial   material;
    EnvFog        fog;
    EnvFilter     filter;
    EnvSkyBox     sky;
    EnvLensFlare  lens_flare;
    bool reserved = false;
};

bool parse_environment(const std::string& text, Environment& out, std::string* err);
bool parse_environment_file(const std::string& path, Environment& out, std::string* err);

} // namespace fmt