# app.py

from flask import Flask, render_template, request, send_file, redirect, url_for
import os
import logging
from utils.meldrx import MeldRxAPI
from utils.oneclick import generate_discharge_paper_one_click
from huggingface_hub import InferenceClient

logging.basicConfig(level=logging.DEBUG)
logger = logging.getLogger(__name__)

app = Flask(__name__)

CLIENT_ID = os.getenv("MELDRX_CLIENT_ID", "04bdc9f9a23d488a868b93d594ee5a4a")
CLIENT_SECRET = os.getenv("MELDRX_CLIENT_SECRET", None)
WORKSPACE_ID = os.getenv("MELDRX_WORKSPACE_ID", "09ed4f76-b5ac-42bf-92d5-496933203dbe")
SPACE_URL = os.getenv("SPACE_URL", "https://multitransformer-tonic-discharge-guard.hf.space")
REDIRECT_URI = f"{SPACE_URL}/auth/callback"

meldrx_api = MeldRxAPI(
    client_id=CLIENT_ID,
    client_secret=CLIENT_SECRET,
    workspace_id=WORKSPACE_ID,
    redirect_uri=REDIRECT_URI
)

HF_TOKEN = os.getenv("HF_TOKEN")
if not HF_TOKEN:
    raise ValueError("HF_TOKEN environment variable not set.")
client = InferenceClient(api_key=HF_TOKEN)

@app.route('/')
def index():
    return render_template('index.html')

@app.route('/auth', methods=['GET', 'POST'])
def auth():
    if request.method == 'POST':
        auth_code = request.form.get('auth_code')
        if auth_code and meldrx_api.authenticate_with_code(auth_code):
            return redirect(url_for('dashboard'))
        return render_template('auth.html', auth_url=meldrx_api.get_authorization_url(), auth_result="Authentication failed")
    return render_template('auth.html', auth_url=meldrx_api.get_authorization_url())

@app.route('/auth/callback', methods=['GET'])
def auth_callback():
    auth_code = request.args.get('code')
    if auth_code and meldrx_api.authenticate_with_code(auth_code):
        return redirect(url_for('dashboard'))
    return render_template('auth.html', auth_url=meldrx_api.get_authorization_url(), auth_result="Callback failed")

@app.route('/dashboard', methods=['GET'])
def dashboard():
    if not meldrx_api.access_token:
        return redirect(url_for('auth'))
    patients_data = meldrx_api.get_patients()
    if not patients_data or "entry" not in patients_data:
        logger.error("Failed to fetch patient data for dashboard")
        return render_template('dashboard.html', error="Failed to fetch patient data")
    patients = [entry['resource'] for entry in patients_data.get('entry', [])]
    logger.debug(f"Patients for dashboard: {patients}")
    return render_template('dashboard.html', patients=patients, authenticated=True)

@app.route('/oneclick', methods=['GET', 'POST'])
def one_click():
    if not meldrx_api.access_token:
        return redirect(url_for('auth'))
    
    if request.method == 'POST':
        patient_id = request.form.get('patient_id', '').strip()
        first_name = request.form.get('first_name', '').strip()
        last_name = request.form.get('last_name', '').strip()
        action = request.form.get('action', '')

        logger.info(f"One-click request - ID: {patient_id}, First: {first_name}, Last: {last_name}, Action: {action}")

        pdf_path, status, basic_summary, ai_summary, verified_summary = generate_discharge_paper_one_click(
            meldrx_api, client, patient_id, first_name, last_name
        )

        if action == "Display Summary":
            return render_template('oneclick.html', 
                                status=status,
                                basic_summary=basic_summary.replace('\n', '<br>') if basic_summary else None,
                                ai_summary=ai_summary.replace('\n', '<br>') if ai_summary else None,
                                verified_summary=verified_summary if verified_summary else None,
                                patient_id=patient_id,
                                first_name=first_name,
                                last_name=last_name)
        elif action == "Generate PDF" and pdf_path:
            return send_file(pdf_path, 
                           as_attachment=True, 
                           download_name=f"discharge_summary_{patient_id or 'patient'}.pdf")
        return render_template('oneclick.html', 
                            status=status,
                            basic_summary=basic_summary.replace('\n', '<br>') if basic_summary else None,
                            ai_summary=ai_summary.replace('\n', '<br>') if ai_summary else None,
                            verified_summary=verified_summary if verified_summary else None,
                            patient_id=patient_id,
                            first_name=first_name,
                            last_name=last_name)

    return render_template('oneclick.html')

if __name__ == '__main__':
    port = int(os.getenv("PORT", 7860))
    app.run(debug=False, host='0.0.0.0', port=port)