import logging
from datetime import datetime
from typing import Any, Optional

from app.core.database import execute_query, execute_query_single

logger = logging.getLogger(__name__)


class TelefoniService:
    @staticmethod
    def find_user_by_extension(extension: Optional[str]) -> Optional[int]:
        if not extension:
            return None
        row = execute_query_single(
            "SELECT user_id FROM users WHERE telefoni_aktiv = TRUE AND telefoni_extension = %s LIMIT 1",
            (extension,),
        )
        return int(row["user_id"]) if row and row.get("user_id") is not None else None

    @staticmethod
    def find_contact_by_phone_suffix(suffix8: Optional[str]) -> Optional[dict]:
        if not suffix8:
            return None

        query = """
            SELECT
                c.id,
                c.first_name,
                c.last_name,
                (
                    SELECT cu.name
                    FROM contact_companies cc
                    JOIN customers cu ON cu.id = cc.customer_id
                    WHERE cc.contact_id = c.id
                    ORDER BY cc.is_primary DESC NULLS LAST, cc.id ASC
                    LIMIT 1
                ) AS company
            FROM contacts c
            WHERE RIGHT(regexp_replace(COALESCE(c.phone, ''), '\\D', '', 'g'), 8) = %s
               OR RIGHT(regexp_replace(COALESCE(c.mobile, ''), '\\D', '', 'g'), 8) = %s
            ORDER BY c.id ASC
            LIMIT 1
        """
        row = execute_query_single(query, (suffix8, suffix8))
        if not row:
            return None
        return {
            "id": row["id"],
            "name": f"{(row.get('first_name') or '').strip()} {(row.get('last_name') or '').strip()}".strip(),
            "company": row.get("company"),
        }

    @staticmethod
    def upsert_call(
        *,
        callid: str,
        user_id: Optional[int],
        direction: str,
        ekstern_nummer: Optional[str],
        intern_extension: Optional[str],
        kontakt_id: Optional[int],
        raw_payload: Any,
        started_at: datetime,
    ) -> dict:
        query = """
            INSERT INTO telefoni_opkald
                (callid, bruger_id, direction, ekstern_nummer, intern_extension, kontakt_id, started_at, raw_payload)
            VALUES
                (%s, %s, %s, %s, %s, %s, %s, %s::jsonb)
            ON CONFLICT (callid)
            DO UPDATE SET
                raw_payload = EXCLUDED.raw_payload,
                direction = EXCLUDED.direction,
                intern_extension = COALESCE(telefoni_opkald.intern_extension, EXCLUDED.intern_extension),
                ekstern_nummer = COALESCE(telefoni_opkald.ekstern_nummer, EXCLUDED.ekstern_nummer),
                bruger_id = COALESCE(telefoni_opkald.bruger_id, EXCLUDED.bruger_id),
                kontakt_id = COALESCE(telefoni_opkald.kontakt_id, EXCLUDED.kontakt_id),
                started_at = LEAST(telefoni_opkald.started_at, EXCLUDED.started_at)
            RETURNING *
        """
        rows = execute_query(
            query,
            (
                callid,
                user_id,
                direction,
                ekstern_nummer,
                intern_extension,
                kontakt_id,
                started_at,
                raw_payload,
            ),
        )
        return rows[0] if rows else {}

    @staticmethod
    def terminate_call(callid: str, duration_sec: Optional[int]) -> bool:
        if not callid:
            return False
        rows = execute_query(
            """
            UPDATE telefoni_opkald
            SET ended_at = NOW(),
                duration_sec = %s
            WHERE callid = %s
            RETURNING id
            """,
            (duration_sec, callid),
        )
        return bool(rows)

    @staticmethod
    def get_contact_details(contact_id: int) -> dict:
        """
        Get extended contact details including:
        - Latest 3 open cases
        - Last call date
        """
        if not contact_id:
            return {"recent_cases": [], "last_call": None}

        # Get the 3 newest open cases for this contact
        cases_query = """
            SELECT 
                s.id,
                s.titel,
                s.created_at
            FROM sag_sager s
            INNER JOIN sag_kontakter sk ON s.id = sk.sag_id
            WHERE sk.contact_id = %s
              AND s.status = 'åben'
              AND s.deleted_at IS NULL
              AND sk.deleted_at IS NULL
            ORDER BY s.created_at DESC
            LIMIT 3
        """
        cases = execute_query(cases_query, (contact_id,)) or []

        # Get the most recent call for this contact
        last_call_query = """
            SELECT 
                t.started_at,
                t.bruger_id,
                t.duration_sec,
                u.full_name,
                u.username
            FROM telefoni_opkald t
            LEFT JOIN users u ON t.bruger_id = u.user_id
            WHERE t.kontakt_id = %s
              AND t.ended_at IS NOT NULL
            ORDER BY t.started_at DESC
            LIMIT 1
        """
        last_call_row = execute_query_single(last_call_query, (contact_id,))
        
        last_call_data = None
        if last_call_row:
            last_call_data = {
                "started_at": last_call_row.get("started_at"),
                "bruger_navn": last_call_row.get("full_name") or last_call_row.get("username"),
                "duration_sec": last_call_row.get("duration_sec"),
            }

        return {
            "recent_cases": [
                {
                    "id": case["id"],
                    "titel": case["titel"],
                    "created_at": case["created_at"],
                }
                for case in cases
            ],
            "last_call": last_call_data,
        }