import requests
import logging
from auth_handler import AuthHandler
from config import Config
from logging_config import setup_logging

# Use the centralized logging configuration
logger = setup_logging(__name__)

class SuperOfficeClient:
    """
    A client for interacting with the SuperOffice REST API using OAuth 2.0 Bearer tokens.
    """
    def __init__(self, auth_handler: AuthHandler):
        self.auth_handler = auth_handler
        self.session = requests.Session()
        
        # Load mappings from Config
        self.udf_contact_mapping = Config.UDF_CONTACT_MAPPING
        self.udf_person_mapping = Config.UDF_PERSON_MAPPING
        self.ma_status_id_map = Config.MA_STATUS_ID_MAP

    def _get_headers(self):
        """Returns the authorization headers with Bearer token."""
        access_token, _ = self.auth_handler.get_ticket()
        return {
            'Authorization': f'Bearer {access_token}',
            'Accept': 'application/json',
            'Content-Type': 'application/json'
        }

    def _get_url(self, path):
        """Constructs the full URL for a given API path."""
        _, webapi_url = self.auth_handler.get_ticket()
        base = webapi_url.rstrip('/')
        p = path.lstrip('/')
        return f"{base}/api/{p}"

    def test_connection(self):
        """Tests the connection by fetching the current user."""
        url = self._get_url("v1/User/currentPrincipal")
        try:
            resp = self.session.get(url, headers=self._get_headers())
            resp.raise_for_status()
            return resp.json()
        except Exception as e:
            logger.error(f"Connection test failed: {e}")
            if hasattr(e, 'response') and e.response is not None:
                logger.error(f"Response: {e.response.text}")
            return None

    def find_contact_by_criteria(self, name=None, url=None, org_nr=None):
        """Searches for a contact by OrgNr, URL, or Name."""
        filters = []
        if org_nr:
            filters.append(f"orgNr eq '{org_nr}'")
        if url:
            filters.append(f"urlAddress eq '{url}'")
        
        if not filters and name:
            filters.append(f"name contains '{name}'")
            
        if not filters:
            return None

        query = " and ".join(filters)
        path = f"v1/Contact?$filter={query}"
        
        try:
            full_url = self._get_url(path)
            resp = self.session.get(full_url, headers=self._get_headers())
            resp.raise_for_status()
            data = resp.json()
            
            results = data.get("value", [])
            if results:
                logger.info(f"Found {len(results)} matching contacts.")
                return results[0]
            return None
        except Exception as e:
            logger.error(f"Error searching for contact: {e}")
            return None

    def create_contact(self, name, url=None, org_nr=None):
        """Creates a new contact (company) in SuperOffice with basic details."""
        url = self._get_url("v1/Contact")
        payload = {
            "Name": name,
            "OrgNr": org_nr,
            "UrlAddress": url,
            "ActivePublications": [],  # Required field, can be empty
            "Emails": [], # Required field, can be empty
            "Phones": [] # Required field, can be empty
        }
        
        # Remove None values
        payload = {k: v for k, v in payload.items() if v is not None}

        try:
            logger.info(f"Attempting to create contact: {name}")
            resp = self.session.post(url, headers=self._get_headers(), json=payload)
            resp.raise_for_status()
            created_contact = resp.json()
            logger.info(f"Successfully created contact: {created_contact.get('Name')} (ID: {created_contact.get('ContactId')})")
            return created_contact
        except Exception as e:
            if hasattr(e, 'response') and e.response is not None:
                logger.error(f"Response: {e.response.text}")
            return None

    def create_person(self, first_name, last_name, contact_id, email=None):
        """Creates a new person linked to a contact (company)."""
        url = self._get_url("v1/Person")
        
        payload = {
            "Firstname": first_name,
            "Lastname": last_name,
            "Contact": {
                "ContactId": contact_id
            },
            "Emails": []
        }
        
        if email:
            payload["Emails"].append({
                "Value": email,
                "Rank": 1,
                "Description": "Work" # Optional description
            })

        try:
            logger.info(f"Attempting to create person: {first_name} {last_name} for Contact ID {contact_id}")
            resp = self.session.post(url, headers=self._get_headers(), json=payload)
            resp.raise_for_status()
            created_person = resp.json()
            logger.info(f"Successfully created person: {created_person.get('Firstname')} {created_person.get('Lastname')} (ID: {created_person.get('PersonId')})")
            return created_person
        except Exception as e:
            if hasattr(e, 'response') and e.response is not None:
                logger.error(f"Response: {e.response.text}")
            return None

    def create_sale(self, title, contact_id, person_id=None, amount=0.0):
        """Creates a new Sale (Opportunity) linked to a contact and optionally a person."""
        url = self._get_url("v1/Sale")
        
        payload = {
            "Heading": title,
            "Contact": {
                "ContactId": contact_id
            },
            "Amount": amount,
            "SaleType": { # Assuming default ID 1 exists
                "Id": 1
            },
            "SaleStage": { # Assuming default ID for the first stage is 1
                "Id": 1
            },
            "Probability": 10 # Default probability
        }
        
        if person_id:
            payload["Person"] = {
                "PersonId": person_id
            }

        try:
            logger.info(f"Attempting to create sale: '{title}' for Contact ID {contact_id}")
            resp = self.session.post(url, headers=self._get_headers(), json=payload)
            resp.raise_for_status()
            created_sale = resp.json()
            logger.info(f"Successfully created sale: {created_sale.get('Heading')} (ID: {created_sale.get('SaleId')})")
            return created_sale
        except Exception as e:
            if hasattr(e, 'response') and e.response is not None:
                logger.error(f"Response: {e.response.text}")
            return None

    def create_project(self, name, contact_id, person_id=None):
        """Creates a new Project linked to a contact and optionally adds a person as a member."""
        url = self._get_url("v1/Project")
        
        payload = {
            "Name": name,
            "Contact": {
                "ContactId": contact_id
            },
            "ProjectType": { # Assuming default ID 1 exists
                "Id": 1
            },
            "ProjectStatus": { # Assuming default ID 1 for 'In progress' exists
                "Id": 1
            },
            "ProjectMembers": []
        }

        if person_id:
            payload["ProjectMembers"].append({
                "PersonId": person_id
            })

        try:
            logger.info(f"Attempting to create project: '{name}' for Contact ID {contact_id}")
            resp = self.session.post(url, headers=self._get_headers(), json=payload)
            resp.raise_for_status()
            created_project = resp.json()
            logger.info(f"Successfully created project: {created_project.get('Name')} (ID: {created_project.get('ProjectId')})")
            return created_project
        except Exception as e:
            logger.error(f"Error creating project: {e}")
            if hasattr(e, 'response') and e.response is not None:
                logger.error(f"Response: {e.response.text}")
            return None

    def update_entity_udfs(self, entity_id, entity_type, udf_data: dict):
        """Updates user-defined fields for a given entity (Contact or Person)."""
        if entity_type not in ["Contact", "Person"]:
            logger.error(f"Invalid entity_type: {entity_type}. Must be 'Contact' or 'Person'.")
            return None

        # 1. Retrieve the existing entity to ensure all required fields are present in the PUT payload
        get_url = self._get_url(f"v1/{entity_type}/{entity_id}")
        try:
            get_resp = self.session.get(get_url, headers=self._get_headers())
            get_resp.raise_for_status()
            existing_entity = get_resp.json()
            logger.info(f"Successfully retrieved existing {entity_type} ID {entity_id}.")
        except Exception as e:
            logger.error(f"Error retrieving existing {entity_type} ID {entity_id}: {e}")
            if hasattr(e, 'response') and e.response is not None:
                logger.error(f"Response: {e.response.text}")
            return None

        # Use the existing entity data as the base for the PUT payload
        payload = existing_entity
        if "UserDefinedFields" not in payload:
            payload["UserDefinedFields"] = {}

        # Select the correct mapping based on entity type
        udf_mapping = self.udf_contact_mapping if entity_type == "Contact" else self.udf_person_mapping
        
        for key, value in udf_data.items():
            prog_id = udf_mapping.get(key)
            if prog_id:
                if key == "ma_status" and entity_type == "Person":
                    # For MA Status, we need to send the internal ID directly as an integer
                    internal_id = self.ma_status_id_map.get(value)
                    if internal_id:
                        payload["UserDefinedFields"][prog_id] = internal_id
                    else:
                        logger.warning(f"Unknown MA Status value '{value}'. Skipping update for {key}.")
                else:
                    # For other UDFs, send the value directly
                    payload["UserDefinedFields"][prog_id] = value
            else:
                logger.warning(f"Unknown UDF key for {entity_type}: {key}. Skipping.")
        
        if not payload["UserDefinedFields"]:
            logger.info(f"No valid UDF data to update for {entity_type} ID {entity_id}.")
            return None

        # 2. Send the updated entity (including all original fields + modified UDFs) via PUT
        put_url = self._get_url(f"v1/{entity_type}/{entity_id}")
        try:
            logger.info(f"Attempting to update UDFs for {entity_type} ID {entity_id} with: {payload['UserDefinedFields']}")
            resp = self.session.put(put_url, headers=self._get_headers(), json=payload)
            resp.raise_for_status()
            updated_entity = resp.json()
            logger.info(f"Successfully updated UDFs for {entity_type} ID {entity_id}.")
            return updated_entity
        except Exception as e:
            logger.error(f"Error updating UDFs for {entity_type} ID {entity_id}: {e}")
            if hasattr(e, 'response') and e.response is not None:
                logger.error(f"Response: {e.response.text}")
            return None


    # NOTE: The create_email_activity method is currently blocked due to SuperOffice environment limitations.
    # Attempting to create an Email Activity via API results in a 500 Internal Server Error,
    # likely because the email module is not licensed or configured in the SOD environment.
    # This method is temporarily commented out.
    #
    # def create_email_activity(self, person_id, contact_id, subject, body):
    #     """Creates an Email Activity linked to a person and contact."""
    #     url = self._get_url("v1/Activity")
    #     
    #     payload = {
    #         "Type": { # Assuming ID 2 for "Email" ActivityType
    #             "Id": 2 
    #         },
    #         "Title": subject,
    #         "Details": body,
    #         "Person": {
    #             "PersonId": person_id
    #         },
    #         "Contact": {
    #             "ContactId": contact_id
    #         }
    #     }
    #
    #     try:
    #         logger.info(f"Attempting to create Email Activity with subject '{subject}' for Person ID {person_id} and Contact ID {contact_id}")
    #         resp = self.session.post(url, headers=self._get_headers(), json=payload)
    #         resp.raise_for_status()
    #         created_activity = resp.json()
    #         logger.info(f"Successfully created Email Activity: '{created_activity.get('Title')}' (ID: {created_activity.get('ActivityId')})")
    #         return created_activity
    #     except Exception as e:
    #         logger.error(f"Error creating Email Activity: {e}")
    #         if hasattr(e, 'response') and e.response is not None:
    #             logger.error(f"Response: {e.response.text}")
    #         return None