"""Contact routes — CRUD, N:M, soft-delete, GDPR hard-delete."""

from __future__ import annotations

import uuid

from fastapi import APIRouter, Depends, HTTPException, Query, Response, status
from sqlalchemy.ext.asyncio import AsyncSession

from app.core.auth import check_permission
from app.core.db import get_db
from app.deps import get_current_user
from app.schemas.contact import ContactCreate, ContactUpdate
from app.services import contact_service

router = APIRouter(prefix="/api/v1/contacts", tags=["contacts"])


@router.get("")
async def list_contacts(
    page: int = Query(1, ge=1),
    page_size: int = Query(20, ge=1, le=100),
    search: str | None = Query(None),
    sort_by: str = Query("last_name"),
    sort_order: str = Query("asc", pattern="^(asc|desc)$"),
    db: AsyncSession = Depends(get_db),
    current_user: dict = Depends(get_current_user),
):
    """List contacts with pagination and optional search."""
    tenant_id = uuid.UUID(current_user["tenant_id"])
    result = await contact_service.list_contacts(
        db, tenant_id,
        page=page, page_size=page_size,
        search=search, sort_by=sort_by, sort_order=sort_order,
    )
    return result


@router.post("", status_code=status.HTTP_201_CREATED)
async def create_contact(
    body: ContactCreate,
    db: AsyncSession = Depends(get_db),
    current_user: dict = Depends(get_current_user),
):
    """Create a contact. Optionally link to companies via company_ids array."""
    tenant_id = uuid.UUID(current_user["tenant_id"])
    user_id = uuid.UUID(current_user["user_id"])
    role = current_user.get("role", "viewer")

    if not check_permission(role, "contacts", "create"):
        raise HTTPException(
            status_code=status.HTTP_403_FORBIDDEN,
            detail={"detail": "Insufficient permissions", "code": "forbidden"},
        )

    data = body.model_dump()
    return await contact_service.create_contact(db, tenant_id, user_id, data)


@router.get("/{contact_id}")
async def get_contact(
    contact_id: str,
    db: AsyncSession = Depends(get_db),
    current_user: dict = Depends(get_current_user),
):
    """Get a single contact with companies array. Cross-tenant returns 404."""
    tenant_id = uuid.UUID(current_user["tenant_id"])
    try:
        cid = uuid.UUID(contact_id)
    except ValueError:
        raise HTTPException(400, detail={"detail": "Invalid contact_id", "code": "invalid_id"})

    data = await contact_service.get_contact_detail(db, tenant_id, cid)
    if data is None:
        raise HTTPException(404, detail={"detail": "Contact not found", "code": "not_found"})
    return data


@router.put("/{contact_id}")
async def update_contact(
    contact_id: str,
    body: ContactUpdate,
    db: AsyncSession = Depends(get_db),
    current_user: dict = Depends(get_current_user),
):
    """Update a contact."""
    tenant_id = uuid.UUID(current_user["tenant_id"])
    user_id = uuid.UUID(current_user["user_id"])
    role = current_user.get("role", "viewer")

    if not check_permission(role, "contacts", "update"):
        raise HTTPException(403, detail={"detail": "Insufficient permissions", "code": "forbidden"})

    try:
        cid = uuid.UUID(contact_id)
    except ValueError:
        raise HTTPException(400, detail={"detail": "Invalid contact_id", "code": "invalid_id"})

    data = body.model_dump(exclude_unset=True)
    result = await contact_service.update_contact(db, tenant_id, user_id, cid, data)
    if result is None:
        raise HTTPException(404, detail={"detail": "Contact not found", "code": "not_found"})
    return result


@router.delete("/{contact_id}")
async def delete_contact(
    contact_id: str,
    gdpr: bool = Query(False),
    db: AsyncSession = Depends(get_db),
    current_user: dict = Depends(get_current_user),
):
    """Delete a contact. Default: soft-delete. Use gdpr=true for hard-delete with deletion_log."""
    tenant_id = uuid.UUID(current_user["tenant_id"])
    user_id = uuid.UUID(current_user["user_id"])
    role = current_user.get("role", "viewer")

    if not check_permission(role, "contacts", "delete"):
        raise HTTPException(403, detail={"detail": "Insufficient permissions", "code": "forbidden"})

    try:
        cid = uuid.UUID(contact_id)
    except ValueError:
        raise HTTPException(400, detail={"detail": "Invalid contact_id", "code": "invalid_id"})

    if gdpr:
        deleted = await contact_service.gdpr_hard_delete_contact(db, tenant_id, user_id, cid)
    else:
        deleted = await contact_service.soft_delete_contact(db, tenant_id, user_id, cid)

    if not deleted:
        raise HTTPException(404, detail={"detail": "Contact not found", "code": "not_found"})

    return Response(status_code=status.HTTP_204_NO_CONTENT)