# Face Detection-Based AI Automation of Lab Tests
# Gradio App with Mobile-Responsive UI and Risk-Level Coloring

import gradio as gr
import cv2
import numpy as np
import mediapipe as mp

mp_face_mesh = mp.solutions.face_mesh
face_mesh = mp_face_mesh.FaceMesh(static_image_mode=True, max_num_faces=1, refine_landmarks=True, min_detection_confidence=0.5)

def estimate_heart_rate(frame, landmarks):
    h, w, _ = frame.shape
    forehead_pts = [landmarks[10], landmarks[338], landmarks[297], landmarks[332]]
    mask = np.zeros((h, w), dtype=np.uint8)
    pts = np.array([[int(pt.x * w), int(pt.y * h)] for pt in forehead_pts], np.int32)
    cv2.fillConvexPoly(mask, pts, 255)
    green_channel = cv2.split(frame)[1]
    mean_intensity = cv2.mean(green_channel, mask=mask)[0]
    heart_rate = int(60 + 30 * np.sin(mean_intensity / 255.0 * np.pi))
    return heart_rate

def estimate_spo2_rr(heart_rate):
    spo2 = min(100, max(90, 97 + (heart_rate % 5 - 2)))
    rr = int(12 + abs(heart_rate % 5 - 2))
    return spo2, rr

def get_risk_color(value, normal_range):
    low, high = normal_range
    if value < low:
        return "🔻 LOW"
    elif value > high:
        return "🔺 HIGH"
    else:
        return "✅ Normal"

def generate_flags_extended(params):
    hb, wbc, platelets, iron, ferritin, tibc, bilirubin, creatinine, tsh, cortisol, fbs, hba1c = params
    flags = []
    if hb < 13.5:
        flags.append("Hemoglobin Low - Possible Anemia")
    if wbc < 4.0 or wbc > 11.0:
        flags.append("Abnormal WBC Count - Possible Infection")
    if platelets < 150:
        flags.append("Platelet Drop Risk - Bruising Possible")
    if iron < 60:
        flags.append("Iron Deficiency Detected")
    if ferritin < 30:
        flags.append("Low Ferritin - Iron Store Low")
    if tibc > 400:
        flags.append("High TIBC - Iron Absorption Issue")
    if bilirubin > 1.2:
        flags.append("Jaundice Detected - Elevated Bilirubin")
    if creatinine > 1.2:
        flags.append("Kidney Function Concern - High Creatinine")
    if tsh < 0.4 or tsh > 4.0:
        flags.append("Thyroid Imbalance - Check TSH")
    if cortisol < 5 or cortisol > 25:
        flags.append("Stress Hormone Abnormality - Cortisol")
    if fbs > 110:
        flags.append("High Fasting Blood Sugar")
    if hba1c > 5.7:
        flags.append("Elevated HbA1c - Diabetes Risk")
    flags.append("Mood / Stress analysis requires separate behavioral model")
    return flags

def analyze_face(image):
    if image is None:
        return {}, None

    frame_rgb = cv2.cvtColor(image, cv2.COLOR_BGR2RGB)
    result = face_mesh.process(frame_rgb)

    if result.multi_face_landmarks:
        landmarks = result.multi_face_landmarks[0].landmark
        heart_rate = estimate_heart_rate(frame_rgb, landmarks)
        spo2, rr = estimate_spo2_rr(heart_rate)

        hb, wbc, platelets = 12.3, 6.4, 210
        iron, ferritin, tibc = 55, 45, 340
        bilirubin, creatinine = 1.5, 1.3
        tsh, cortisol = 2.5, 18
        fbs, hba1c = 120, 6.2

        flags = generate_flags_extended([hb, wbc, platelets, iron, ferritin, tibc, bilirubin, creatinine, tsh, cortisol, fbs, hba1c])

        sections = {
            "🩸 Hematology": [
                f"Hemoglobin (Hb): {hb} g/dL - {get_risk_color(hb, (13.5, 17.5))}",
                f"WBC Count: {wbc} x10^3/uL - {get_risk_color(wbc, (4.0, 11.0))}",
                f"Platelet Count: {platelets} x10^3/uL - {get_risk_color(platelets, (150, 450))}"
            ],
            "🧬 Iron & Liver Panel": [
                f"Iron: {iron} µg/dL - {get_risk_color(iron, (60, 170))}",
                f"Ferritin: {ferritin} ng/mL - {get_risk_color(ferritin, (30, 300))}",
                f"TIBC: {tibc} µg/dL - {get_risk_color(tibc, (250, 400))}",
                f"Bilirubin: {bilirubin} mg/dL - {get_risk_color(bilirubin, (0.3, 1.2))}"
            ],
            "🧪 Kidney, Thyroid & Stress": [
                f"Creatinine: {creatinine} mg/dL - {get_risk_color(creatinine, (0.6, 1.2))}",
                f"TSH: {tsh} µIU/mL - {get_risk_color(tsh, (0.4, 4.0))}",
                f"Cortisol: {cortisol} µg/dL - {get_risk_color(cortisol, (5, 25))}"
            ],
            "🧁 Metabolic Panel": [
                f"Fasting Blood Sugar: {fbs} mg/dL - {get_risk_color(fbs, (70, 110))}",
                f"HbA1c: {hba1c}% - {get_risk_color(hba1c, (4.0, 5.7))}"
            ],
            "❤️ Vital Signs": [
                f"SpO2: {spo2}% - {get_risk_color(spo2, (95, 100))}",
                f"Heart Rate: {heart_rate} bpm - {get_risk_color(heart_rate, (60, 100))}",
                f"Respiratory Rate: {rr} breaths/min - {get_risk_color(rr, (12, 20))}",
                "Blood Pressure: Low (simulated)"
            ],
            "⚠️ Risk Flags": flags
        }
        return sections, frame_rgb
    else:
        return {"⚠️ Error": ["Face not detected"]}, None

# Mobile-optimized UI with styled labels
demo = gr.Blocks(css="""
@media only screen and (max-width: 768px) {
  .gr-block.gr-column { width: 100% !important; }
}
""")
with demo:
    gr.Markdown("""
    # 🧠 Face-Based AI Lab Test Inference
    Upload a clear face image to simulate categorized lab reports with visual grouping.
    """)

    with gr.Row():
        with gr.Column(scale=1):
            image_input = gr.Image(type="numpy", label="📸 Upload a Face Image")
            submit_btn = gr.Button("🔍 Analyze Now")
        with gr.Column(scale=2):
            accordion_output = gr.Accordion("📂 Diagnostic Summary", open=True)
            with accordion_output:
                result_html = gr.HighlightedText(label="📊 Grouped Report", combine_adjacent=True)
            result_image = gr.Image(label="🧍 Annotated Face Scan")

    def format_report(sections):
        lines = []
        for title, values in sections.items():
            lines.append((f"{title}",))
            for item in values:
                lines.append((f" - {item}",))
        return lines

    submit_btn.click(
        fn=analyze_face,
        inputs=image_input,
        outputs=[result_html, result_image],
        preprocess=False,
        postprocess=False,
        _js="(data) => [data]"
    ).then(
        fn=format_report,
        inputs=None,
        outputs=result_html
    )

    gr.Markdown("---\n✅ Optimized for Mobile · Risk Indicators: 🔻 Low, 🔺 High, ✅ Normal")

demo.launch()