import gradio as gr
import json
from datetime import datetime
from patient_registration import register_patient
from test_selection import select_tests, get_tests_by_category
from billing import fetch_billing

# Load data
def load_data():
    try:
        with open("data.json", "r") as file:
            return json.load(file)
    except FileNotFoundError:
        return {}

# Save data
def save_data(data):
    with open("data.json", "w") as file:
        json.dump(data, file)

# Load data and last sequence
def load_data():
    try:
        with open("data.json", "r") as file:
            data = json.load(file)
            return data.get("patients", {}), data.get("last_sequence", {"year": None, "month": None, "number": 0})
    except FileNotFoundError:
        return {}, {"year": None, "month": None, "number": 0}

# Save data and last sequence
def save_data(patients, last_sequence):
    with open("data.json", "w") as file:
        json.dump({"patients": patients, "last_sequence": last_sequence}, file)

# Generate patient ID
def generate_patient_id(phone, last_sequence):
    today = datetime.now()
    current_year = today.year
    current_month = today.month
    
    # Check if year or month has changed
    if last_sequence["year"] != current_year or last_sequence["month"] != current_month:
        # Reset sequence for new year/month
        last_sequence["year"] = current_year
        last_sequence["month"] = current_month
        last_sequence["number"] = 1
    else:
        # Increment sequence number
        last_sequence["number"] += 1
    
    # Format patient ID
    patient_id = f"{current_year}{current_month:02d}{last_sequence['number']:05d}"
    return patient_id

# Patient Registration Tab
def registration_interface(name, father_name, age, phone, address, pincode):
    # Load data and sequence info
    patients, last_sequence = load_data()
    
    # Generate patient ID
    patient_id = generate_patient_id(phone, last_sequence)
    
    # Add patient details to data
    patients[patient_id] = {
        "name": name,
        "father_name": father_name,
        "age": age,
        "phone": phone,
        "address": address,
        "pincode": pincode,
        "tests": [],
        "total_cost": 0
    }
    
    # Save data and updated sequence
    save_data(patients, last_sequence)  # Pass both `patients` and `last_sequence`
    return f"Patient Registered. Patient ID: {patient_id}"

# Tests Selection Tab
def test_interface(categories):
    available_tests = get_tests_by_category(categories)
    return gr.update(choices=available_tests)  # Update dropdown with available tests

def confirm_tests_interface(patient_id, selected_tests):
    patients, last_sequence = load_data()  # Load both patients and last_sequence
    response = select_tests(patient_id, selected_tests, patients)  # Update patients directly
    save_data(patients, last_sequence)  # Save both patients and last_sequence
    return response


def billing_interface(patient_id):
    patients, _ = load_data()  # Load patients and ignore last_sequence
    if patient_id in patients:
        billing_info = fetch_billing(patient_id, patients)
        return billing_info
    else:
        return "Invalid Patient ID. Please check the ID."


# Gradio Interface
with gr.Blocks() as app:
    gr.Markdown("# Sathkrutha LIMS - Patient Management and Billing App")

    with gr.Tab("Patient Registration"):
        with gr.Row():
            name = gr.Textbox(label="Patient Name", placeholder="Enter patient name", elem_id="name_field", lines=1)
            father_name = gr.Textbox(label="Father/Husband Name", placeholder="Enter father or husband name", elem_id="father_name_field", lines=1)
        with gr.Row():
            age = gr.Number(label="Age", value=None, minimum=0, maximum=99, elem_id="age_field")
            phone = gr.Number(label="Phone Number", value=None, elem_id="phone_field")
        with gr.Row():
            address = gr.Textbox(label="Address", placeholder="Enter address", lines=2)
            pincode = gr.Number(label="Pincode", value=None, elem_id="pincode_field")
        register_button = gr.Button("Register Patient")
        registration_output = gr.Textbox(label="Registration Output")

        register_button.click(registration_interface, [name, father_name, age, phone, address, pincode], registration_output)

    with gr.Tab("Tests"):
        patient_id_test = gr.Textbox(label="Patient ID")
        categories = gr.CheckboxGroup(
            ["Haematology", "Clinical Pathology", "Biochemistry", "Microbiology", "Specific Diseases", "Serology", "Radiology", "Other Diagnostic Tests"],
            label="Select Test Categories"
        )
        available_tests = gr.CheckboxGroup(label="Available Tests")
        confirm_button = gr.Button("Confirm Tests")
        test_output = gr.Textbox(label="Test Selection Output")

        categories.change(test_interface, inputs=categories, outputs=available_tests)  # Update available tests based on selected categories
        confirm_button.click(confirm_tests_interface, [patient_id_test, available_tests], test_output)

    with gr.Tab("Billing"):
        patient_id_bill = gr.Textbox(label="Patient ID")
        fetch_button = gr.Button("Fetch Billing")
        billing_output = gr.Textbox(label="Billing Information")
        fetch_button.click(billing_interface, [patient_id_bill], billing_output)

# Custom CSS to adjust field sizes
app.css = """
#name_field, #father_name_field {
    max-width: 750px;
}

#age_field {
    max-width: 300px;
}

#phone_field {
    max-width: 1100px;
}

#pincode_field {
    max-width: 400px;
}
"""

app.launch()