#ifndef MODEL_DETECTOR_H
#define MODEL_DETECTOR_H

#include <string>
#include <vector>
#include <map>

/**
 * @brief Detected model architecture types
 */
enum class ModelArchitecture {
    UNKNOWN,
    SD_1_5,      // Stable Diffusion 1.x (768 text encoder)
    SD_2_1,      // Stable Diffusion 2.x (1024 text encoder)
    SDXL_BASE,   // Stable Diffusion XL Base
    SDXL_REFINER,// Stable Diffusion XL Refiner
    FLUX_SCHNELL,// Flux Schnell
    FLUX_DEV,    // Flux Dev
    FLUX_CHROMA, // Flux Chroma (unlocked variant)
    SD_3,        // Stable Diffusion 3
    QWEN2VL,     // Qwen2-VL vision-language model
};

/**
 * @brief Model detection result with detailed information
 */
struct ModelDetectionResult {
    ModelArchitecture architecture = ModelArchitecture::UNKNOWN;
    std::string architectureName;

    // Model properties
    int textEncoderDim = 0;      // Text encoder dimension (768, 1024, etc.)
    int unetChannels = 0;        // UNet channel count
    bool hasConditioner = false;  // SDXL conditioner
    bool hasRefiner = false;      // SDXL refiner components

    // Required auxiliary models
    bool needsVAE = false;
    std::string recommendedVAE;   // Recommended VAE model
    bool needsTAESD = false;      // Can use TAESD for faster preview

    // Loading parameters
    std::map<std::string, std::string> suggestedParams;

    // Raw metadata
    std::map<std::string, std::string> metadata;
    std::vector<std::string> tensorNames;
};

/**
 * @brief Model detector class for analyzing model files
 */
class ModelDetector {
public:
    /**
     * @brief Detect model architecture from file
     *
     * @param modelPath Path to model file (.safetensors, .ckpt, etc.)
     * @return ModelDetectionResult Detection result with architecture info
     */
    static ModelDetectionResult detectModel(const std::string& modelPath);

    /**
     * @brief Parse safetensors file header
     *
     * @param filePath Path to safetensors file
     * @param metadata Output: metadata from header
     * @param tensorInfo Output: tensor names and shapes
     * @return true if successfully parsed, false otherwise
     */
    static bool parseSafetensorsHeader(
        const std::string& filePath,
        std::map<std::string, std::string>& metadata,
        std::map<std::string, std::vector<int64_t>>& tensorInfo
    );

    /**
     * @brief Parse GGUF file header
     *
     * @param filePath Path to GGUF file
     * @param metadata Output: metadata from header
     * @param tensorInfo Output: tensor names and dimensions
     * @return true if successfully parsed, false otherwise
     */
    static bool parseGGUFHeader(
        const std::string& filePath,
        std::map<std::string, std::string>& metadata,
        std::map<std::string, std::vector<int64_t>>& tensorInfo
    );

    /**
     * @brief Analyze tensor structure to determine architecture
     *
     * @param tensorInfo Map of tensor names to shapes
     * @param metadata Model metadata
     * @param filename Model filename (for special variant detection)
     * @return ModelArchitecture Detected architecture
     */
    static ModelArchitecture analyzeArchitecture(
        const std::map<std::string, std::vector<int64_t>>& tensorInfo,
        const std::map<std::string, std::string>& metadata,
        const std::string& filename = ""
    );

    /**
     * @brief Get architecture name as string
     *
     * @param arch Model architecture enum
     * @return std::string Human-readable architecture name
     */
    static std::string getArchitectureName(ModelArchitecture arch);

    /**
     * @brief Get recommended loading parameters for architecture
     *
     * @param arch Model architecture
     * @return std::map<std::string, std::string> Recommended parameters
     */
    static std::map<std::string, std::string> getRecommendedParams(ModelArchitecture arch);
};

#endif // MODEL_DETECTOR_H