app.py

import os
import tempfile
import logging
from typing import Tuple, Dict

import gradio as gr
from huggingface_hub import snapshot_download
from PIL import Image

from runners.simple_runner import SimpleRunner


# -----------------------------------------------------------------------------
# Logging (use lazy % formatting as requested)
# -----------------------------------------------------------------------------
logging.basicConfig(level=logging.INFO)
logger = logging.getLogger("sfe-app")


# -----------------------------------------------------------------------------
# Model bootstrap (load once and reuse)
# -----------------------------------------------------------------------------
RUNNER: SimpleRunner | None = None


def ensure_weights():
    """Make sure pretrained weights exist locally; otherwise fetch from your HF model repo."""
    need = [
        "pretrained_models/sfe_editor_light.pt",
        "pretrained_models/stylegan2-ffhq-config-f.pt",
    ]
    if all(os.path.exists(p) for p in need):
        return

    repo_id = "LogicGoInfotechSpaces/Smile_Changer_pre_model"
    logger.info("Missing weights; downloading snapshot from %s", repo_id)
    snapshot_download(
        repo_id=repo_id,
        local_dir="pretrained_models",
        local_dir_use_symlinks=False,
        allow_patterns=["**/*"],
    )


def get_runner() -> SimpleRunner:
    global RUNNER
    if RUNNER is None:
        ensure_weights()
        logger.info("Initializing SimpleRunner with %s", "pretrained_models/sfe_editor_light.pt")
        RUNNER = SimpleRunner(
            editor_ckpt_pth="pretrained_models/sfe_editor_light.pt",
        )
    return RUNNER


# -----------------------------------------------------------------------------
# Attribute catalog and recommended ranges
# -----------------------------------------------------------------------------
# Each entry maps a friendly attribute name to the internal editing name and a
# recommended power range for the slider.
ATTRIBUTE_MAP: Dict[str, Tuple[str, Tuple[float, float]]] = {
    # Face semantics
    "Smile": ("fs_smiling", (-10.0, 10.0)),
    "Age": ("age", (-10.0, 10.0)),  # interfacegan_directions
    "Female features": ("gender", (-10.0, 7.0)),  # stylespace_directions (positive adds femininity)

    # Facial hair
    # trimmed_beard removes beard for positive power; use negative to add
    "Beard": ("trimmed_beard", (-30.0, 30.0)),
    # goatee removes goatee for positive; negative tends to add
    "Mustache/Goatee": ("goatee", (-7.0, 7.0)),

    # Accessories & cosmetics
    "Glasses": ("fs_glasses", (-20.0, 30.0)),
    "Makeup": ("fs_makeup", (-10.0, 15.0)),

    # Hair style (pretrained mappers)
    "Curly hair": ("curly_hair", (0.0, 0.12)),  # styleclip_directions
    "Afro": ("afro", (0.0, 0.14)),

    # Hair color via global text mapper
    # You can also type custom prompts below
    "Orange hair (text)": ("styleclip_global_a face_a face with orange hair_0.18", (0.0, 0.2)),
    "Blonde hair (text)": ("styleclip_global_a face_a face with blonde hair_0.18", (0.0, 0.2)),
}


def recommended_range(attr_name: str) -> Tuple[float, float]:
    edit_name, rng = ATTRIBUTE_MAP[attr_name]
    return rng


def run_edit(
    image: Image.Image,
    attribute: str,
    strength: float,
    align_face: bool,
    use_bg_mask: bool,
    custom_text_edit: str,
) -> Image.Image:
    """Run a single attribute edit and return the edited image."""
    runner = get_runner()

    # Determine editing name and clip strength into the suggested range
    edit_name, (lo, hi) = ATTRIBUTE_MAP[attribute]
    if custom_text_edit and attribute.endswith("(text)"):
        # Allow overriding the default text prompt
        if custom_text_edit.strip():
            edit_name = custom_text_edit.strip()

    clipped_strength = max(lo, min(hi, strength))
    if clipped_strength != strength:
        logger.info("Clipped strength from %s to %s for %s", strength, clipped_strength, attribute)

    # Persist input to a temp file for the runner
    with tempfile.TemporaryDirectory() as tmpdir:
        inp_path = os.path.join(tmpdir, "input.jpg")
        out_path = os.path.join(tmpdir, "edited.jpg")
        image.convert("RGB").save(inp_path)

        logger.info("Editing %s with power %s", edit_name, clipped_strength)
        _ = runner.edit(
            orig_img_pth=inp_path,
            editing_name=edit_name,
            edited_power=clipped_strength,
            save_pth=out_path,
            align=align_face,
            use_mask=use_bg_mask,
        )

        return Image.open(out_path).convert("RGB")


def build_ui() -> gr.Blocks:
    with gr.Blocks(css="footer {visibility: hidden}") as demo:
        gr.Markdown("""
        **StyleFeatureEditor – Facial Attribute Editing**  
        Upload a face and apply edits like smile, age, beard, hair style/color, glasses, and makeup.  
        Tip: For Beard/Goatee, negative strength tends to add facial hair.
        """)

        with gr.Row():
            with gr.Column():
                inp = gr.Image(type="pil", label="Input face", sources=["upload", "clipboard"])
                attr = gr.Dropdown(
                    choices=list(ATTRIBUTE_MAP.keys()),
                    value="Smile",
                    label="Attribute",
                )
                strength = gr.Slider(-15, 15, value=5, step=0.01, label="Strength (p)")
                align_face = gr.Checkbox(value=False, label="Align face before editing")
                use_bg_mask = gr.Checkbox(value=False, label="Use background mask (reduce artifacts)")
                custom_text = gr.Textbox(
                    value="",
                    label="Custom text edit (StyleCLIP Global Mapper)",
                    placeholder="styleclip_global_a face_a face with black hair_0.18",
                )
                run_btn = gr.Button("Run edit")

            with gr.Column():
                out = gr.Image(type="pil", label="Edited output")

        # Update slider range based on attribute selection
        def _on_attr_change(name: str):
            lo, hi = recommended_range(name)
            # Keep current value within new bounds
            new_val = max(lo, min(hi, strength.value if hasattr(strength, "value") else 0))
            return gr.Slider.update(minimum=lo, maximum=hi, value=new_val)

        attr.change(_on_attr_change, inputs=attr, outputs=strength)

        run_btn.click(
            fn=run_edit,
            inputs=[inp, attr, strength, align_face, use_bg_mask, custom_text],
            outputs=out,
        )

    return demo


if __name__ == "__main__":
    app = build_ui()
    # On Spaces, the port/host are managed by the platform; run local defaults otherwise
    app.launch()