import streamlit as st
import pandas as pd
from PIL import Image, ImageDraw, ImageFont
import io

def main():
    st.sidebar.image("logo.png", use_container_width=True)
    st.sidebar.title("Label Generator")
    st.sidebar.markdown("For [AI Energy Score Leaderboard](https://huggingface.co/spaces/AIEnergyScore/Leaderboard)")

    # Load CSV
    try:
        data_df = pd.read_csv("data.csv")
    except FileNotFoundError:
        st.sidebar.error("Could not find 'data.csv'! Please make sure it's present.")
        return
    except Exception as e:
        st.sidebar.error(f"Error reading 'data.csv': {e}")
        return

    # Check columns
    required_columns = ["model", "provider", "date", "task", "hardware", "energy", "score"]
    for col in required_columns:
        if col not in data_df.columns:
            st.sidebar.error(f"The CSV file must contain a column named '{col}'.")
            return

    st.sidebar.write("### Instructions:")
    st.sidebar.write("#### 1. Select a model below")

    model_options = data_df["model"].unique().tolist()
    selected_model = st.sidebar.selectbox(
        "Scored Models",
        model_options,
        help="Start typing to search for a model"
    )
    st.sidebar.write("#### 2. Download the label")

    model_data = data_df[data_df["model"] == selected_model].iloc[0]

    # Select background by score
    try:
        score = int(model_data["score"])
        background_path = f"{score}.png"
        background = Image.open(background_path).convert("RGBA")
    except FileNotFoundError:
        st.sidebar.error(f"Could not find background image '{score}.png'. Using default background.")
        background = Image.open("default_background.png").convert("RGBA")
    except ValueError:
        st.sidebar.error(f"Invalid score '{model_data['score']}'. Score must be an integer.")
        return

    # Keep the final label size at 520×728
    final_size = (520, 728)
    generated_label = create_label_single_pass(background, model_data, final_size)

    st.image(generated_label, caption="Generated Label Preview", width=520)

    img_buffer = io.BytesIO()
    generated_label.save(img_buffer, format="PNG")
    img_buffer.seek(0)

    st.sidebar.download_button(
        label="Download",
        data=img_buffer,
        file_name="AIEnergyScore.png",
        mime="image/png"
    )

    st.sidebar.write("#### 3. Share your label in technical reports, announcements, etc.")


def create_label_single_pass(background_image, model_data, final_size=(520, 728)):
    """
    Resizes the background to 520×728, then draws text onto it.
    """
    # 1. Resize background to final_size
    bg_resized = background_image.resize(final_size, Image.Resampling.LANCZOS)
    draw = ImageDraw.Draw(bg_resized)

    # 2. Load fonts at sizes appropriate for a 520×728 label
    try:
        title_font = ImageFont.truetype("Inter_24pt-Bold.ttf", size=27)
        details_font = ImageFont.truetype("Inter_18pt-Regular.ttf", size=23)
        energy_font = ImageFont.truetype("Inter_18pt-Medium.ttf", size=24)
    except Exception as e:
        st.error(f"Font loading failed: {e}")
        return bg_resized

    # 3. Place your text. 
    #    You may need to experiment with x/y coordinates or font sizes
    #    to make it look right in 520×728.
    title_x, title_y = 33, 150
    details_x, details_y = 480, 256
    energy_x, energy_y = 480, 472

    # Text 1 (title)
    draw.text((title_x, title_y), str(model_data['model']), font=title_font, fill="black")
    draw.text((title_x, title_y + 38), str(model_data['provider']), font=title_font, fill="black")

    # Text 2 (details)
    details_lines = [
        str(model_data['date']),
        str(model_data['task']),
        str(model_data['hardware'])
    ]
    for i, line in enumerate(details_lines):
        bbox = draw.textbbox((0, 0), line, font=details_font)
        text_width = bbox[2] - bbox[0]
        # Right-justify the details text at details_x
        draw.text((details_x - text_width, details_y + i*47), line, font=details_font, fill="black")

    # Text 3 (energy)
    energy_text = str(model_data['energy'])
    bbox = draw.textbbox((0, 0), energy_text, font=energy_font)
    energy_text_width = bbox[2] - bbox[0]
    # Right-align the energy text at energy_x
    draw.text((energy_x - energy_text_width, energy_y), energy_text, font=energy_font, fill="black")

    return bg_resized


if __name__ == "__main__":
    main()