"""Nexus Instance Manager — Flask Application."""
import os
import sys
from datetime import datetime
from flask import Flask, jsonify, render_template, send_from_directory, request

# Ensure POS modules are importable for tenant_manager reuse
POS_DIR = os.environ.get("POS_DIR", "/home/Autopartes/pos")
if POS_DIR not in sys.path:
    sys.path.insert(0, POS_DIR)

from config import APP_NAME, APP_VERSION
from blueprints.auth_bp import auth_bp, require_manager_auth
from blueprints.tenants_bp import tenants_bp
from blueprints.demos_bp import demos_bp
from blueprints.health_bp import health_bp
from blueprints.admin_bp import admin_bp


def create_app():
    app = Flask(
        __name__,
        template_folder="templates",
        static_folder="static"
    )
    app.secret_key = os.environ.get("MANAGER_JWT_SECRET", "dev-secret-change-me")

    # Register blueprints
    app.register_blueprint(auth_bp)
    app.register_blueprint(tenants_bp)
    app.register_blueprint(demos_bp)
    app.register_blueprint(health_bp)
    app.register_blueprint(admin_bp)

    # ─── Frontend Routes ───────────────────────────────────────────────────
    @app.route("/")
    def index():
        return render_template("index.html")

    @app.route("/login")
    def login_page():
        return render_template("index.html")

    @app.route("/dashboard")
    def dashboard_page():
        return render_template("index.html")

    @app.route("/tenants")
    def tenants_page():
        return render_template("index.html")

    @app.route("/demos")
    def demos_page():
        return render_template("index.html")

    @app.route("/health")
    def health_page():
        return render_template("index.html")

    @app.route("/migrations")
    def migrations_page():
        return render_template("index.html")

    # ─── Static Asset Helpers ──────────────────────────────────────────────
    @app.route("/static/<path:filename>")
    def static_files(filename):
        return send_from_directory("static", filename)

    # ─── API Status ────────────────────────────────────────────────────────
    @app.route("/api/status")
    def api_status():
        return jsonify({
            "app": APP_NAME,
            "version": APP_VERSION,
            "timestamp": datetime.utcnow().isoformat(),
            "pos_dir": POS_DIR
        })

    # ─── Error Handlers ────────────────────────────────────────────────────
    @app.errorhandler(404)
    def not_found(e):
        if request.path.startswith("/api/"):
            return jsonify({"error": "Not found"}), 404
        return render_template("index.html")

    @app.errorhandler(500)
    def internal_error(e):
        if request.path.startswith("/api/"):
            return jsonify({"error": "Internal server error"}), 500
        return render_template("index.html")

    return app


# Entry point for Gunicorn: gunicorn -w 2 -b 0.0.0.0:5003 app:app
app = create_app()

if __name__ == "__main__":
    app.run(host="0.0.0.0", port=5003, debug=True)