app.py

import gradio as gr
import torch
import numpy as np
from transformers import AutoModelForSequenceClassification, AutoTokenizer
from transformers import RobertaForSequenceClassification, RobertaTokenizer

# Load fine-tuned sentiment model from Hugging Face
sentiment_model = AutoModelForSequenceClassification.from_pretrained("SamanthaStorm/tether-sentiment")
sentiment_tokenizer = AutoTokenizer.from_pretrained("SamanthaStorm/tether-sentiment")

# Load abuse pattern model
model_name = "SamanthaStorm/Tether"
model = RobertaForSequenceClassification.from_pretrained(model_name, trust_remote_code=True)
tokenizer = RobertaTokenizer.from_pretrained(model_name, trust_remote_code=True)

LABELS = [
    "gaslighting", "mockery", "dismissiveness", "control", "guilt_tripping", "apology_baiting", "blame_shifting", "projection",
    "contradictory_statements", "manipulation", "deflection", "insults", "obscure_formal", "recovery_phase", "non_abusive",
    "suicidal_threat", "physical_threat", "extreme_control"
]

THRESHOLDS = {
    "gaslighting": 0.25, "mockery": 0.15, "dismissiveness": 0.30, "control": 0.43, "guilt_tripping": 0.19,
    "apology_baiting": 0.45, "blame_shifting": 0.23, "projection": 0.50, "contradictory_statements": 0.25,
    "manipulation": 0.25, "deflection": 0.30, "insults": 0.34, "obscure_formal": 0.25, "recovery_phase": 0.25,
    "non_abusive": 2.0, "suicidal_threat": 0.45, "physical_threat": 0.10, "extreme_control": 0.36
}

PATTERN_LABELS = LABELS[:15]
DANGER_LABELS = LABELS[15:18]

EXPLANATIONS = {
    "gaslighting": "Gaslighting involves making someone question their own reality or perceptions...",
    "blame_shifting": "Blame-shifting is when one person redirects the responsibility...",
    "projection": "Projection involves accusing the victim of behaviors the abuser exhibits.",
    "dismissiveness": "Dismissiveness is belittling or disregarding another person’s feelings.",
    "mockery": "Mockery ridicules someone in a hurtful, humiliating way.",
    "recovery_phase": "Recovery phase dismisses someone's emotional healing process.",
    "insults": "Insults are derogatory remarks aimed at degrading someone.",
    "apology_baiting": "Apology-baiting manipulates victims into apologizing for abuser's behavior.",
    "deflection": "Deflection avoids accountability by redirecting blame.",
    "control": "Control restricts autonomy through manipulation or coercion.",
    "extreme_control": "Extreme control dominates decisions and behaviors entirely.",
    "physical_threat": "Physical threats signal risk of bodily harm.",
    "suicidal_threat": "Suicidal threats manipulate others using self-harm threats.",
    "guilt_tripping": "Guilt-tripping uses guilt to manipulate someone’s actions.",
    "manipulation": "Manipulation deceives to influence or control outcomes.",
    "non_abusive": "Non-abusive language is respectful and free of coercion.",
    "obscure_formal": "Obscure/formal language manipulates through confusion or superiority."
}

def custom_sentiment(text):
    inputs = sentiment_tokenizer(text, return_tensors="pt", truncation=True, padding=True)
    with torch.no_grad():
        outputs = sentiment_model(**inputs)
    probs = torch.nn.functional.softmax(outputs.logits, dim=1)
    label_idx = torch.argmax(probs).item()
    label = sentiment_model.config.id2label[label_idx]
    score = probs[0][label_idx].item()
    return {"label": label, "score": score}

def calculate_abuse_level(scores, thresholds):
    triggered_scores = [score for label, score in zip(LABELS, scores) if score > thresholds[label]]
    return round(np.mean(triggered_scores) * 100, 2) if triggered_scores else 0.0

def interpret_abuse_level(score):
    if score > 80: return "Extreme / High Risk"
    elif score > 60: return "Severe / Harmful Pattern Present"
    elif score > 40: return "Likely Abuse"
    elif score > 20: return "Mild Concern"
    return "Very Low / Likely Safe"

def analyze_messages(input_text, risk_flags):
    input_text = input_text.strip()
    if not input_text:
        return "Please enter a message for analysis."

    sentiment = custom_sentiment(input_text)
    sentiment_label = sentiment['label']
    sentiment_score = sentiment['score']

    adjusted_thresholds = {k: v * 0.8 for k, v in THRESHOLDS.items()} if sentiment_label == "NEGATIVE" else THRESHOLDS.copy()

    inputs = tokenizer(input_text, return_tensors="pt", truncation=True, padding=True)
    with torch.no_grad():
        outputs = model(**inputs)
    scores = torch.sigmoid(outputs.logits.squeeze(0)).numpy()

    pattern_count = sum(score > adjusted_thresholds[label] for label, score in zip(PATTERN_LABELS, scores[:15]))
    danger_flag_count = sum(score > adjusted_thresholds[label] for label, score in zip(DANGER_LABELS, scores[15:18]))

    contextual_flags = risk_flags if risk_flags else []
    if len(contextual_flags) >= 2:
        danger_flag_count += 1

    critical_flags = ["They've threatened harm", "They monitor/follow me", "I feel unsafe when alone with them"]
    high_risk_context = any(flag in contextual_flags for flag in critical_flags)

    non_abusive_score = scores[LABELS.index('non_abusive')]
    if non_abusive_score > adjusted_thresholds['non_abusive']:
        return "This message is classified as non-abusive."

    abuse_level = calculate_abuse_level(scores, THRESHOLDS)
    abuse_description = interpret_abuse_level(abuse_level)

    if danger_flag_count >= 2:
        resources = "Immediate assistance recommended. Please seek professional help or contact emergency services."
    else:
        resources = "For more information on abuse patterns, consider reaching out to support groups or professional counselors."

    scored_patterns = [(label, score) for label, score in zip(PATTERN_LABELS, scores[:15])]
    top_patterns = sorted(scored_patterns, key=lambda x: x[1], reverse=True)[:2]

    top_pattern_explanations = "\n".join([
        f"\u2022 {label.replace('_', ' ').title()}: {EXPLANATIONS.get(label, 'No explanation available.')}"
        for label, _ in top_patterns
    ])

    result = (
        f"Abuse Risk Score: {abuse_level}% – {abuse_description}\n\n"
        f"Most Likely Patterns:\n{top_pattern_explanations}\n\n"
        f"⚠️ Critical Danger Flags Detected: {danger_flag_count} of 3\n"
        "The Danger Assessment is a validated tool that helps identify serious risk in intimate partner violence.\n\n"
        f"Resources: {resources}\n\n"
        f"Sentiment: {sentiment_label} (Confidence: {sentiment_score*100:.2f}%)"
    )

    if contextual_flags:
        result += "\n\n⚠️ You indicated the following:\n" + "\n".join([f"• {flag}" for flag in contextual_flags])
    if high_risk_context:
        result += "\n\n🚨 These responses suggest a high-risk situation. Consider seeking immediate help or safety planning resources."

    return result

iface = gr.Interface(
    fn=analyze_messages,
    inputs=[
        gr.Textbox(lines=10, placeholder="Enter message here..."),
        gr.CheckboxGroup(label="Do any of these apply to your situation?", choices=[
            "They've threatened harm", "They isolate me", "I’ve changed my behavior out of fear",
            "They monitor/follow me", "I feel unsafe when alone with them"
        ])
    ],
    outputs=[gr.Textbox(label="Analysis Result")],
    title="Abuse Pattern Detector"
)

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