"""
Project configuration for GAP-CLIP scripts.

This module provides default paths, column names, and runtime constants used by
training/evaluation scripts. Values can be edited locally as needed.
"""

from __future__ import annotations

from pathlib import Path
import torch


def _detect_device() -> torch.device:
    if torch.cuda.is_available():
        return torch.device("cuda")
    if torch.backends.mps.is_available():
        return torch.device("mps")
    return torch.device("cpu")


ROOT_DIR = Path(__file__).resolve().parent

# Runtime/device
device = _detect_device()

# Embedding dimensions
color_emb_dim = 16
hierarchy_emb_dim = 64
main_emb_dim = 512

# Default training hyperparameters
DEFAULT_BATCH_SIZE = 64
DEFAULT_LEARNING_RATE = 1.5e-5
DEFAULT_TEMPERATURE = 0.09

# Data columns
text_column = "text"
color_column = "color"
hierarchy_column = "hierarchy"
column_local_image_path = "local_image_path"
column_url_image = "image_url"

# Paths
local_dataset_path = str(ROOT_DIR / "data" / "data.csv")
color_model_path = str(ROOT_DIR / "models" / "color_model.pt")
hierarchy_model_path = str(ROOT_DIR / "models" / "hierarchy_model.pth")
main_model_path = str(ROOT_DIR / "models" / "gap_clip.pth")
images_dir = str(ROOT_DIR / "data" / "images")
fashion_mnist_csv = str(ROOT_DIR / "data" / "fashion-mnist_test.csv")



def print_config() -> None:
    """Pretty-print core configuration."""
    print("GAP-CLIP Configuration")
    print(f"  device: {device}")
    print(f"  dims: color={color_emb_dim}, hierarchy={hierarchy_emb_dim}, total={main_emb_dim}")
    print(f"  dataset: {local_dataset_path}")
    print(f"  color model: {color_model_path}")
    print(f"  hierarchy model: {hierarchy_model_path}")
    print(f"  main model: {main_model_path}")


def validate_paths() -> dict[str, bool]:
    """Return path existence checks for key files."""
    checks = {
        "local_dataset_path": Path(local_dataset_path).exists(),
        "color_model_path": Path(color_model_path).exists(),
        "hierarchy_model_path": Path(hierarchy_model_path).exists(),
        "main_model_path": Path(main_model_path).exists()
    }
    return checks