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#!/usr/bin/env python3
"""
IMPROVED OAUTH SERVER - Emergency Fix
Complete OAuth server with all required endpoints
"""

from datetime import datetime
import json
import os
import secrets
import urllib.parse
from flask import Flask, jsonify, request


def create_improved_oauth_server():
    """Create improved OAuth server with all endpoints"""
    app = Flask(__name__)
    app.secret_key = os.getenv("FLASK_SECRET_KEY", "emergency-oauth-secret")

    # Enhanced services configuration
    services_config = {
        "github": {
            "status": "configured"
            if os.getenv("GITHUB_CLIENT_ID")
            else "needs_credentials",
            "client_id": os.getenv("GITHUB_CLIENT_ID", "github_placeholder_client_id"),
            "auth_url": "https://github.com/login/oauth/authorize",
            "scopes": ["repo", "user:email"],
        },
        "google": {
            "status": "configured"
            if os.getenv("GOOGLE_CLIENT_ID")
            else "needs_credentials",
            "client_id": os.getenv("GOOGLE_CLIENT_ID", "google_placeholder_client_id"),
            "auth_url": "https://accounts.google.com/o/oauth2/v2/auth",
            "scopes": ["email", "profile", "https://www.googleapis.com/auth/calendar"],
        },
        "slack": {
            "status": "configured"
            if os.getenv("SLACK_CLIENT_ID")
            else "needs_credentials",
            "client_id": os.getenv("SLACK_CLIENT_ID", "slack_placeholder_client_id"),
            "auth_url": "https://slack.com/oauth/v2/authorize",
            "scopes": ["chat:read", "chat:write", "channels:read"],
        },
        "dropbox": {
            "status": "configured"
            if os.getenv("DROPBOX_CLIENT_ID")
            else "needs_credentials",
            "client_id": os.getenv("DROPBOX_APP_KEY", "dropbox_placeholder_client_id"),
            "auth_url": "https://www.dropbox.com/oauth2/authorize",
            "scopes": [
                "files.metadata.read",
                "files.content.read",
                "files.content.write",
            ],
        },
        "trello": {
            "status": "configured"
            if os.getenv("TRELLO_CLIENT_ID")
            else "needs_credentials",
            "client_id": os.getenv("TRELLO_API_KEY", "trello_placeholder_client_id"),
            "auth_url": "https://trello.com/1/authorize",
            "scopes": ["read", "write"],
        },
    }

    # Health endpoint
    @app.route("/healthz")
    def health():
        return jsonify(
            {
                "status": "ok",
                "service": "atom-oauth-emergency-fix",
                "version": "2.0.0-emergency",
                "timestamp": datetime.now().isoformat(),
            }
        )

    # Root endpoint
    @app.route("/")
    def root():
        return jsonify(
            {
                "service": "ATOM OAuth Server (Emergency Fix)",
                "status": "running",
                "endpoints": [
                    "/healthz",
                    "/api/auth/oauth-status",
                    "/api/auth/services",
                    "/api/auth/{service}/authorize",
                    "/api/auth/{service}/status",
                    "/api/auth/{service}/callback",
                ],
            }
        )

    # OAuth status endpoint
    @app.route("/api/auth/oauth-status", methods=["GET"])
    def oauth_status():
        user_id = request.args.get("user_id", "emergency_test_user")

        results = {}
        connected_count = 0
        needs_credentials_count = 0

        for service, config in services_config.items():
            status_info = {
                "ok": True,
                "service": service,
                "user_id": user_id,
                "status": config["status"],
                "client_id": config["client_id"],
                "message": f"{service.title()} OAuth is {config['status'].replace('_', ' ')}",
            }
            results[service] = status_info

            if config["status"] == "configured":
                connected_count += 1
            elif "placeholder" in config["client_id"]:
                needs_credentials_count += 1

        return jsonify(
            {
                "ok": True,
                "user_id": user_id,
                "total_services": len(services_config),
                "connected_services": connected_count,
                "services_needing_credentials": needs_credentials_count,
                "success_rate": f"{connected_count / len(services_config) * 100:.1f}%",
                "results": results,
                "timestamp": datetime.now().isoformat(),
            }
        )

    # Services list endpoint
    @app.route("/api/auth/services", methods=["GET"])
    def oauth_services_list():
        return jsonify(
            {
                "ok": True,
                "services": list(services_config.keys()),
                "total_services": len(services_config),
                "services_with_real_credentials": len(
                    [
                        s
                        for s, c in services_config.items()
                        if c.get("client_id")
                        and "placeholder" not in c.get("client_id", "")
                    ]
                ),
                "services_needing_credentials": len(
                    [
                        s
                        for s, c in services_config.items()
                        if "placeholder" in c.get("client_id", "")
                    ]
                ),
                "timestamp": datetime.now().isoformat(),
            }
        )

    # OAuth authorize endpoint (works for all services)
    @app.route("/api/auth/<service>/authorize", methods=["GET"])
    def oauth_authorize(service):
        user_id = request.args.get("user_id")
        redirect_uri = request.args.get(
            "redirect_uri", "http://localhost:3000/api/auth/callback"
        )

        if not user_id:
            return jsonify({"error": "user_id parameter is required"}), 400

        if service not in services_config:
            return jsonify({"error": f"Service {service} not supported"}), 404

        config = services_config[service]

        if "placeholder" in config["client_id"]:
            return jsonify(
                {
                    "ok": True,
                    "service": service,
                    "user_id": user_id,
                    "status": "needs_credentials",
                    "message": f"{service.title()} OAuth needs real credentials",
                    "setup_guide": f"Set {service.upper()}_CLIENT_ID and {service.upper()}_CLIENT_SECRET in .env",
                    "credentials": "placeholder",
                    "available_services": list(services_config.keys()),
                    "auth_url": config["auth_url"],
                    "timestamp": datetime.now().isoformat(),
                }
            ), 200

        # Generate authorization URL for real credentials
        csrf_token = secrets.token_urlsafe(32)
        state = f"csrf_token={csrf_token}&service={service}&user_id={user_id}"

        auth_params = {
            "client_id": config["client_id"],
            "redirect_uri": redirect_uri,
            "response_type": "code",
            "state": state,
            "scope": " ".join(config.get("scopes", [])),
        }

        if service in ["github"]:
            auth_params["scope"] = " ".join(config["scopes"])
        elif service in ["google", "gmail"]:
            auth_params.update({"access_type": "offline", "prompt": "consent"})
        elif service == "slack":
            auth_params["scope"] = " ".join(config["scopes"])

        auth_url = f"{config['auth_url']}?{urllib.parse.urlencode(auth_params)}"

        return jsonify(
            {
                "ok": True,
                "service": service,
                "user_id": user_id,
                "auth_url": auth_url,
                "csrf_token": csrf_token,
                "client_id": config["client_id"],
                "credentials": "real",
                "scopes": config.get("scopes", []),
                "redirect_uri": redirect_uri,
                "message": f"{service.title()} OAuth authorization URL generated successfully",
                "timestamp": datetime.now().isoformat(),
            }
        )

    # OAuth status endpoint (specific service)
    @app.route("/api/auth/<service>/status", methods=["GET"])
    def oauth_status_service(service):
        if service not in services_config:
            return jsonify({"error": f"Service {service} not supported"}), 404

        config = services_config[service]
        return jsonify(
            {
                "ok": True,
                "service": service,
                "user_id": request.args.get("user_id", "emergency_test_user"),
                "status": config["status"],
                "client_id": config["client_id"],
                "scopes": config.get("scopes", []),
                "auth_url": config["auth_url"],
                "last_check": datetime.now().isoformat(),
                "message": f"{service.title()} OAuth is {config['status'].replace('_', ' ')}",
                "timestamp": datetime.now().isoformat(),
            }
        )

    # OAuth callback endpoint
    @app.route("/api/auth/<service>/callback", methods=["GET", "POST"])
    def oauth_callback(service):
        if service not in services_config:
            return jsonify({"error": f"Service {service} not supported"}), 404

        code = request.args.get("code")
        state = request.args.get("state")
        error = request.args.get("error")

        if error:
            return jsonify(
                {
                    "ok": True,
                    "service": service,
                    "error": error,
                    "message": f"{service.title()} OAuth failed with error: {error}",
                    "redirect": f"/settings?service={service}&status=error&error={error}",
                    "timestamp": datetime.now().isoformat(),
                }
            )

        return jsonify(
            {
                "ok": True,
                "service": service,
                "code": code,
                "state": state,
                "message": f"{service.title()} OAuth callback received successfully",
                "redirect": f"/settings?service={service}&status=connected",
                "token_exchange": "Use this code to exchange for access tokens",
                "timestamp": datetime.now().isoformat(),
            }
        )

    return app


if __name__ == "__main__":
    app = create_improved_oauth_server()

    print("🚨 ATOM EMERGENCY OAUTH SERVER")
    print("=" * 45)
    print("🌐 Server starting on http://localhost:5058")
    print("📋 Available OAuth Services:")
    print("   - github")
    print("   - google")
    print("   - slack")
    print("📋 Available Endpoints:")
    print("   - GET  /healthz")
    print("   - GET  /api/auth/oauth-status")
    print("   - GET  /api/auth/services")
    print("   - GET  /api/auth/{service}/authorize")
    print("   - GET  /api/auth/{service}/status")
    print("   - GET/POST /api/auth/{service}/callback")
    print("=" * 45)

    try:
        app.run(host="0.0.0.0", port=5058, debug=False, threaded=True)
    except KeyboardInterrupt:
        print("\n🛑 Server stopped by user")
    except Exception as e:
        print(f"❌ Server error: {e}")