"""
Download all v2 models to local cache.

Total disk: ~35 GB
  - SDXL 1.0 base (DreamShaper-XL turbo)         ~7 GB
  - SDXL refiner                                  ~6 GB
  - SDXL inpainting                               ~6 GB
  - IP-Adapter XL + image encoder                ~3 GB
  - Stable Video Diffusion XT 1.1                ~10 GB
  - ControlNet Canny / Depth / OpenPose (SDXL)   ~3 GB (3 × 1 GB)
  - controlnet-aux Annotators                     ~1 GB
"""
from __future__ import annotations

import logging
import os
from pathlib import Path

log = logging.getLogger(__name__)


def download_all() -> None:
    from huggingface_hub import snapshot_download
    from config.settings import settings

    models = [
        ("SDXL DreamShaper-XL turbo", settings.t2i_model_id),
        ("SDXL Inpainting", settings.inpaint_model_id),
        ("IP-Adapter XL (image encoder)", settings.image_encoder_id),
        ("Stable Video Diffusion XT 1.1", settings.svd_model_id),
        ("ControlNet Canny SDXL", settings.controlnet_canny_id),
        ("ControlNet Depth SDXL", settings.controlnet_depth_id),
        ("ControlNet OpenPose SDXL", settings.controlnet_openpose_id),
    ]
    if settings.t2i_refiner_id:
        models.append(("SDXL Refiner", settings.t2i_refiner_id))

    cache_dir = os.getenv("HF_HOME", str(Path.home() / ".cache" / "huggingface"))
    log.info("Downloading %d models to cache: %s", len(models), cache_dir)

    for name, model_id in models:
        log.info("--- Downloading %s (%s) ---", name, model_id)
        try:
            snapshot_download(
                repo_id=model_id,
                cache_dir=cache_dir,
                max_workers=4,
            )
            log.info("✓ %s", name)
        except Exception as exc:
            log.error("✗ %s: %s", name, exc)

    # IP-Adapter weights (need explicit subfolder + filename)
    log.info("--- Downloading IP-Adapter XL weights (base ViT-H) ---")
    try:
        from huggingface_hub import hf_hub_download
        # Download the BASE ip-adapter_sdxl_vit-h.safetensors (1664-dim, matches SDXL)
        # NOT the "plus" variant which has 1280-dim projection that mismatches.
        hf_hub_download(
            repo_id=settings.ip_adapter_model_id,
            filename=f"{settings.ip_adapter_subfolder}/{settings.ip_adapter_weight_name}",
            cache_dir=cache_dir,
        )
        log.info("✓ IP-Adapter XL base weights (ip-adapter_sdxl_vit-h.safetensors)")
    except Exception as exc:
        log.error("✗ IP-Adapter weights: %s", exc)

    log.info("All downloads complete.")


if __name__ == "__main__":
    logging.basicConfig(level=logging.INFO,
                        format="%(asctime)s | %(levelname)s | %(message)s")
    download_all()