app.py

# import gradio as gr
# import pandas as pd
# import os
# from pathlib import Path
# from datetime import datetime
# import random
# from PIL import Image

# # Global state
# state = {
#     "session_active": False,
#     "image_pairs": [],
#     "current_index": 0,
#     "evaluations": [],
#     "doctor_name": "",
# }

# # Helper functions
# def get_image_files(folder_path):
#     """Get all image files from a folder."""
#     valid_extensions = {'.jpg', '.jpeg', '.png', '.gif'}
#     files = {}
#     if os.path.exists(folder_path):
#         for file in os.listdir(folder_path):
#             if Path(file).suffix.lower() in valid_extensions:
#                 files[file] = file
#     return files

# def create_image_pairs():
#     """Create paired images from roentgen and pedisynth folders."""
#     roentgen_files = get_image_files("roentgen")
#     pedisynth_files = get_image_files("pedisynth")
    
#     pairs = []
    
#     # Match files by exact filename across folders
#     for filename in roentgen_files:
#         if filename in pedisynth_files:
#             # Randomly decide which image goes left and which goes right
#             is_roentgen_left = random.choice([True, False])
#             # Extract condition by removing the file extension and last part (number)
#             name_without_ext = Path(filename).stem
#             parts = name_without_ext.rsplit(' ', 1)
#             condition = parts[0] if len(parts) > 1 else name_without_ext
            
#             pairs.append({
#                 'roentgen': filename,
#                 'pedisynth': filename,
#                 'condition': condition,
#                 'base_name': name_without_ext,
#                 'roentgen_left': is_roentgen_left
#             })
    
#     # Randomize order
#     random.shuffle(pairs)
#     return pairs

# def load_image(folder, filename):
#     """Load image from folder."""
#     filepath = os.path.join(folder, filename)
#     try:
#         return Image.open(filepath)
#     except Exception as e:
#         print(f"Error loading image {filename}: {e}")
#         return None

# def save_evaluations(evaluations, doctor_name):
#     """Save evaluations to CSV."""
#     df = pd.DataFrame(evaluations)
#     timestamp = datetime.now().strftime("%Y%m%d_%H%M%S")
#     filename = f"evaluations_{doctor_name}_{timestamp}.csv"
    
#     # Save to outputs folder if it exists, otherwise current directory
#     output_dir = "outputs"
#     os.makedirs(output_dir, exist_ok=True)
#     filepath = os.path.join(output_dir, filename)
    
#     df.to_csv(filepath, index=False)
#     return filepath, filename

# def start_session(doctor_name):
#     """Start a new evaluation session."""
#     if not doctor_name.strip():
#         return (gr.update(visible=False), "Please enter your name to start a session.")
    
#     state["doctor_name"] = doctor_name
#     state["image_pairs"] = create_image_pairs()
#     state["session_active"] = True
#     state["current_index"] = 0
#     state["evaluations"] = []
    
#     if not state["image_pairs"]:
#         return (gr.update(visible=False), "No image pairs found. Please ensure both roentgen/ and pedisynth/ folders have matching images.")
    
#     return (gr.update(visible=True), "")

# def get_preference_a():
#     """Handle preference for option A."""
#     if not state["session_active"]:
#         return None, None, "Session not active."
    
#     current_pair = state["image_pairs"][state["current_index"]]
#     preferred_source = state["current_left_source"]
    
#     state["evaluations"].append({
#         'timestamp': datetime.now().isoformat(),
#         'condition': current_pair['condition'],
#         'base_name': current_pair['base_name'],
#         'preference': preferred_source.capitalize(),
#         'doctor': state["doctor_name"]
#     })
    
#     state["current_index"] += 1
    
#     if state["current_index"] >= len(state["image_pairs"]):
#         state["session_active"] = False
#         return None, None, "✅ Evaluation complete! All images have been reviewed."
    
#     current_pair = state["image_pairs"][state["current_index"]]
    
#     if current_pair['roentgen_left']:
#         left_image = load_image("roentgen", current_pair['roentgen'])
#         right_image = load_image("pedisynth", current_pair['pedisynth'])
#         state["current_left_source"] = "roentgen"
#         state["current_right_source"] = "pedisynth"
#     else:
#         left_image = load_image("pedisynth", current_pair['pedisynth'])
#         right_image = load_image("roentgen", current_pair['roentgen'])
#         state["current_left_source"] = "pedisynth"
#         state["current_right_source"] = "roentgen"
    
#     progress = f"Image {state['current_index'] + 1} of {len(state['image_pairs'])} | Condition: {current_pair['condition']}"
    
#     return left_image, right_image, progress

# def get_preference_b():
#     """Handle preference for option B."""
#     if not state["session_active"]:
#         return None, None, "Session not active."
    
#     current_pair = state["image_pairs"][state["current_index"]]
#     preferred_source = state["current_right_source"]
    
#     state["evaluations"].append({
#         'timestamp': datetime.now().isoformat(),
#         'condition': current_pair['condition'],
#         'base_name': current_pair['base_name'],
#         'preference': preferred_source.capitalize(),
#         'doctor': state["doctor_name"]
#     })
    
#     state["current_index"] += 1
    
#     if state["current_index"] >= len(state["image_pairs"]):
#         state["session_active"] = False
#         return None, None, "✅ Evaluation complete! All images have been reviewed."
    
#     current_pair = state["image_pairs"][state["current_index"]]
    
#     if current_pair['roentgen_left']:
#         left_image = load_image("roentgen", current_pair['roentgen'])
#         right_image = load_image("pedisynth", current_pair['pedisynth'])
#         state["current_left_source"] = "roentgen"
#         state["current_right_source"] = "pedisynth"
#     else:
#         left_image = load_image("pedisynth", current_pair['pedisynth'])
#         right_image = load_image("roentgen", current_pair['roentgen'])
#         state["current_left_source"] = "pedisynth"
#         state["current_right_source"] = "roentgen"
    
#     progress = f"Image {state['current_index'] + 1} of {len(state['image_pairs'])} | Condition: {current_pair['condition']}"
    
#     return left_image, right_image, progress

# def display_first_pair():
#     """Display the first image pair after session starts."""
#     if not state["session_active"]:
#         return None, None, ""
    
#     current_pair = state["image_pairs"][state["current_index"]]
    
#     if current_pair['roentgen_left']:
#         left_image = load_image("roentgen", current_pair['roentgen'])
#         right_image = load_image("pedisynth", current_pair['pedisynth'])
#         state["current_left_source"] = "roentgen"
#         state["current_right_source"] = "pedisynth"
#     else:
#         left_image = load_image("pedisynth", current_pair['pedisynth'])
#         right_image = load_image("roentgen", current_pair['roentgen'])
#         state["current_left_source"] = "pedisynth"
#         state["current_right_source"] = "roentgen"
    
#     progress = f"Image {state['current_index'] + 1} of {len(state['image_pairs'])} | Condition: {current_pair['condition']}"
    
#     return left_image, right_image, progress

# def end_session():
#     """End the session and return CSV file."""
#     if not state["evaluations"]:
#         return None, "No evaluations recorded."
    
#     filepath, filename = save_evaluations(state["evaluations"], state["doctor_name"])
    
#     state["session_active"] = False
#     state["current_index"] = 0
#     state["evaluations"] = []
    
#     return filepath, f"✅ Evaluations saved as: {filename}"

# # Gradio interface
# with gr.Blocks(title="X-Ray Quality Evaluation") as demo:
#     gr.Markdown("# 🏥 X-Ray Quality Evaluation System")
#     gr.Markdown("**Pairwise Preference Test for Synthetic X-Ray Images**")
    
#     with gr.Row():
#         with gr.Column(scale=1):
#             gr.Markdown("### Start Session")
#             doctor_name_input = gr.Textbox(
#                 label="Enter your name:",
#                 placeholder="Dr. Smith"
#             )
#             start_btn = gr.Button("Start Session", variant="primary", size="lg")
        
#         with gr.Column(scale=1):
#             gr.Markdown("### Results")
#             download_btn = gr.Button("End Session & Download Results", variant="primary", size="lg")
#             result_message = gr.Textbox(
#                 label="Status",
#                 interactive=False,
#                 show_label=True
#             )
    
#     error_section = gr.Textbox(
#         label="Message",
#         interactive=False,
#         show_label=True,
#         value=""
#     )
    
#     # Image comparison section
#     with gr.Group(visible=False) as eval_section:
#         gr.Markdown("### Compare Images")
        
#         progress_text = gr.Textbox(
#             label="Progress",
#             interactive=False,
#             show_label=True
#         )
        
#         with gr.Row():
#             image_a = gr.Image(
#                 label="Option A",
#                 show_label=True,
#                 type="pil"
#             )
#             image_b = gr.Image(
#                 label="Option B",
#                 show_label=True,
#                 type="pil"
#             )
        
#         with gr.Row():
#             pref_a = gr.Button("👈 Prefer Option A", size="lg")
#             pref_b = gr.Button("👉 Prefer Option B", size="lg")
    
#     # File download
#     download_file = gr.File(
#         label="CSV Results",
#         visible=False
#     )
    
#     # Event handlers
#     start_btn.click(
#         start_session,
#         inputs=doctor_name_input,
#         outputs=[eval_section, error_section]
#     ).then(
#         display_first_pair,
#         outputs=[image_a, image_b, progress_text]
#     )
    
#     pref_a.click(
#         get_preference_a,
#         outputs=[image_a, image_b, progress_text]
#     )
    
#     pref_b.click(
#         get_preference_b,
#         outputs=[image_a, image_b, progress_text]
#     )
    
#     download_btn.click(
#         end_session,
#         outputs=[download_file, result_message]
#     )

# if __name__ == "__main__":
#     demo.launch()


import gradio as gr
import pandas as pd
import os
from pathlib import Path
from datetime import datetime
import random
from PIL import Image

# Global state
state = {
    "session_active": False,
    "image_pairs": [],
    "current_index": 0,
    "evaluations": [],
    "doctor_name": "",
}

# Helper functions
def get_image_files(folder_path):
    """Get all image files from a folder."""
    valid_extensions = {'.jpg', '.jpeg', '.png', '.gif'}
    files = {}
    if os.path.exists(folder_path):
        for file in os.listdir(folder_path):
            if Path(file).suffix.lower() in valid_extensions:
                files[file] = file
    return files

def create_image_pairs():
    """Create paired images from roentgen and pedisynth folders."""
    roentgen_files = get_image_files("roentgen")
    pedisynth_files = get_image_files("pedisynth")
    
    pairs = []
    
    # Match files by exact filename across folders
    for filename in roentgen_files:
        if filename in pedisynth_files:
            # Randomly decide which image goes left and which goes right
            is_roentgen_left = random.choice([True, False])
            # Extract condition by removing the file extension and last part (number)
            name_without_ext = Path(filename).stem
            parts = name_without_ext.rsplit(' ', 1)
            condition = parts[0] if len(parts) > 1 else name_without_ext
            
            pairs.append({
                'roentgen': filename,
                'pedisynth': filename,
                'condition': condition,
                'base_name': name_without_ext,
                'roentgen_left': is_roentgen_left
            })
    
    # Randomize order
    random.shuffle(pairs)
    return pairs

def load_image(folder, filename):
    """Load image from folder."""
    filepath = os.path.join(folder, filename)
    try:
        return Image.open(filepath)
    except Exception as e:
        print(f"Error loading image {filename}: {e}")
        return None

def save_evaluations(evaluations, doctor_name):
    """Save evaluations to CSV."""
    df = pd.DataFrame(evaluations)
    timestamp = datetime.now().strftime("%Y%m%d_%H%M%S")
    filename = f"evaluations_{doctor_name}_{timestamp}.csv"
    
    # Save to outputs folder if it exists, otherwise current directory
    output_dir = "outputs"
    os.makedirs(output_dir, exist_ok=True)
    filepath = os.path.join(output_dir, filename)
    
    df.to_csv(filepath, index=False)
    return filepath, filename

def start_session(doctor_name):
    """Start a new evaluation session."""
    if not doctor_name.strip():
        return (gr.update(visible=False), "Please enter your name to start a session.")
    
    state["doctor_name"] = doctor_name
    state["image_pairs"] = create_image_pairs()
    state["session_active"] = True
    state["current_index"] = 0
    state["evaluations"] = []
    
    if not state["image_pairs"]:
        return (gr.update(visible=False), "No image pairs found. Please ensure both roentgen/ and pedisynth/ folders have matching images.")
    
    return (gr.update(visible=True), "")

def get_preference_a():
    """Handle preference for option A."""
    if not state["session_active"]:
        return None, None, "Session not active."
    
    current_pair = state["image_pairs"][state["current_index"]]
    preferred_source = state["current_left_source"]
    
    state["evaluations"].append({
        'timestamp': datetime.now().isoformat(),
        'condition': current_pair['condition'],
        'base_name': current_pair['base_name'],
        'preference': preferred_source.capitalize(),
        'doctor': state["doctor_name"]
    })
    
    state["current_index"] += 1
    
    if state["current_index"] >= len(state["image_pairs"]):
        state["session_active"] = False
        return None, None, "✅ Evaluation complete! All images have been reviewed."
    
    current_pair = state["image_pairs"][state["current_index"]]
    
    if current_pair['roentgen_left']:
        left_image = load_image("roentgen", current_pair['roentgen'])
        right_image = load_image("pedisynth", current_pair['pedisynth'])
        state["current_left_source"] = "roentgen"
        state["current_right_source"] = "pedisynth"
    else:
        left_image = load_image("pedisynth", current_pair['pedisynth'])
        right_image = load_image("roentgen", current_pair['roentgen'])
        state["current_left_source"] = "pedisynth"
        state["current_right_source"] = "roentgen"
    
    progress = f"Image {state['current_index'] + 1} of {len(state['image_pairs'])} | Condition: {current_pair['condition']}"
    
    return left_image, right_image, progress

def get_preference_b():
    """Handle preference for option B."""
    if not state["session_active"]:
        return None, None, "Session not active."
    
    current_pair = state["image_pairs"][state["current_index"]]
    preferred_source = state["current_right_source"]
    
    state["evaluations"].append({
        'timestamp': datetime.now().isoformat(),
        'condition': current_pair['condition'],
        'base_name': current_pair['base_name'],
        'preference': preferred_source.capitalize(),
        'doctor': state["doctor_name"]
    })
    
    state["current_index"] += 1
    
    if state["current_index"] >= len(state["image_pairs"]):
        state["session_active"] = False
        return None, None, "✅ Evaluation complete! All images have been reviewed."
    
    current_pair = state["image_pairs"][state["current_index"]]
    
    if current_pair['roentgen_left']:
        left_image = load_image("roentgen", current_pair['roentgen'])
        right_image = load_image("pedisynth", current_pair['pedisynth'])
        state["current_left_source"] = "roentgen"
        state["current_right_source"] = "pedisynth"
    else:
        left_image = load_image("pedisynth", current_pair['pedisynth'])
        right_image = load_image("roentgen", current_pair['roentgen'])
        state["current_left_source"] = "pedisynth"
        state["current_right_source"] = "roentgen"
    
    progress = f"Image {state['current_index'] + 1} of {len(state['image_pairs'])} | Condition: {current_pair['condition']}"
    
    return left_image, right_image, progress

def display_first_pair():
    """Display the first image pair after session starts."""
    if not state["session_active"]:
        return None, None, ""
    
    current_pair = state["image_pairs"][state["current_index"]]
    
    if current_pair['roentgen_left']:
        left_image = load_image("roentgen", current_pair['roentgen'])
        right_image = load_image("pedisynth", current_pair['pedisynth'])
        state["current_left_source"] = "roentgen"
        state["current_right_source"] = "pedisynth"
    else:
        left_image = load_image("pedisynth", current_pair['pedisynth'])
        right_image = load_image("roentgen", current_pair['roentgen'])
        state["current_left_source"] = "pedisynth"
        state["current_right_source"] = "roentgen"
    
    progress = f"Image {state['current_index'] + 1} of {len(state['image_pairs'])} | Condition: {current_pair['condition']}"
    
    return left_image, right_image, progress

def end_session():
    """End the session and return CSV file for download."""
    if not state["evaluations"]:
        return None, "No evaluations recorded."
    
    filepath, filename = save_evaluations(state["evaluations"], state["doctor_name"])
    
    state["session_active"] = False
    state["current_index"] = 0
    state["evaluations"] = []
    
    return filepath, f"✅ Evaluations ready to download: {filename}"

# Gradio interface
with gr.Blocks(title="X-Ray Quality Evaluation") as demo:
    gr.Markdown("# 🏥 X-Ray Quality Evaluation System")
    gr.Markdown("**Pairwise Preference Test for Synthetic X-Ray Images**")
    
    with gr.Row():
        with gr.Column(scale=1):
            gr.Markdown("### Start Session")
            doctor_name_input = gr.Textbox(
                label="Enter your name:",
                placeholder="Dr. Smith"
            )
            start_btn = gr.Button("Start Session", variant="primary", size="lg")
        
        with gr.Column(scale=1):
            gr.Markdown("### Results")
            download_btn = gr.Button("End Session & Download Results", variant="primary", size="lg")
            result_message = gr.Textbox(
                label="Status",
                interactive=False,
                show_label=True
            )
    
    error_section = gr.Textbox(
        label="Message",
        interactive=False,
        show_label=True,
        value=""
    )
    
    # Image comparison section
    with gr.Group(visible=False) as eval_section:
        gr.Markdown("### Compare Images")
        
        progress_text = gr.Textbox(
            label="Progress",
            interactive=False,
            show_label=True
        )
        
        with gr.Row():
            image_a = gr.Image(
                label="Option A",
                show_label=True,
                type="pil"
            )
            image_b = gr.Image(
                label="Option B",
                show_label=True,
                type="pil"
            )
        
        with gr.Row():
            pref_a = gr.Button("👈 Prefer Option A", size="lg")
            pref_b = gr.Button("👉 Prefer Option B", size="lg")
    
    # File download
    download_file = gr.File(
        label="CSV Results",
        interactive=False
    )
    
    # Event handlers
    start_btn.click(
        start_session,
        inputs=doctor_name_input,
        outputs=[eval_section, error_section]
    ).then(
        display_first_pair,
        outputs=[image_a, image_b, progress_text]
    )
    
    pref_a.click(
        get_preference_a,
        outputs=[image_a, image_b, progress_text]
    )
    
    pref_b.click(
        get_preference_b,
        outputs=[image_a, image_b, progress_text]
    )
    
    download_btn.click(
        end_session,
        outputs=[download_file, result_message]
    )

if __name__ == "__main__":
    demo.launch()