"""Unit + integration tests for internal_ticket_service."""
import uuid
import pytest
from sqlalchemy.ext.asyncio import AsyncSession

from app.models.account import Account
from app.models.user import User
from app.services.internal_ticket_service import (
    create_ticket, update_status, get_ticket,
    list_tickets_for_account, promote_to_psa,
)


# ---------------------------------------------------------------------------
# Test helpers
# ---------------------------------------------------------------------------

async def _make_account(db: AsyncSession) -> Account:
    s = str(uuid.uuid4())[:8]
    account = Account(
        id=uuid.uuid4(),
        name=f"Test Account {s}",
        display_code=s[:8],
    )
    db.add(account)
    await db.flush()
    return account


async def _make_user(
    db: AsyncSession,
    *,
    account_id: uuid.UUID,
    role: str = "l1_tech",
) -> User:
    s = str(uuid.uuid4())[:8]
    user = User(
        id=uuid.uuid4(),
        email=f"user-{s}@example.com",
        name=f"User {s}",
        account_id=account_id,
        account_role=role,
        role="engineer",
        is_active=True,
    )
    db.add(user)
    await db.flush()
    return user


# ---------------------------------------------------------------------------
# Tests
# ---------------------------------------------------------------------------

@pytest.mark.asyncio
async def test_create_ticket_sets_status_open(test_db: AsyncSession):
    account = await _make_account(test_db)
    l1 = await _make_user(test_db, account_id=account.id)
    ticket = await create_ticket(
        test_db,
        account_id=account.id,
        created_by_user_id=l1.id,
        problem_statement="Outlook can't connect",
        customer_name="Alice",
    )
    assert ticket.status == 'open'
    assert ticket.account_id == account.id
    assert ticket.customer_name == "Alice"
    assert ticket.created_by_user_id == l1.id


@pytest.mark.asyncio
async def test_update_status_to_resolved_sets_resolved_at(test_db: AsyncSession):
    account = await _make_account(test_db)
    l1 = await _make_user(test_db, account_id=account.id)
    ticket = await create_ticket(
        test_db,
        account_id=account.id,
        created_by_user_id=l1.id,
        problem_statement="Test",
    )
    assert ticket.resolved_at is None
    updated = await update_status(
        test_db,
        ticket_id=ticket.id,
        status='resolved',
        resolution_notes="Fixed via reboot",
    )
    assert updated.status == 'resolved'
    assert updated.resolved_at is not None
    assert updated.resolution_notes == "Fixed via reboot"


@pytest.mark.asyncio
async def test_update_status_to_escalated_does_not_set_resolved_at(test_db: AsyncSession):
    account = await _make_account(test_db)
    l1 = await _make_user(test_db, account_id=account.id)
    ticket = await create_ticket(
        test_db, account_id=account.id, created_by_user_id=l1.id,
        problem_statement="x",
    )
    updated = await update_status(test_db, ticket_id=ticket.id, status='escalated')
    assert updated.status == 'escalated'
    assert updated.resolved_at is None


@pytest.mark.asyncio
async def test_update_status_assigns_user(test_db: AsyncSession):
    account = await _make_account(test_db)
    l1 = await _make_user(test_db, account_id=account.id)
    engineer = await _make_user(test_db, account_id=account.id, role="engineer")
    ticket = await create_ticket(
        test_db, account_id=account.id, created_by_user_id=l1.id,
        problem_statement="x",
    )
    updated = await update_status(
        test_db, ticket_id=ticket.id, status='escalated',
        assigned_user_id=engineer.id,
    )
    assert updated.assigned_user_id == engineer.id


@pytest.mark.asyncio
async def test_get_ticket_returns_none_for_missing_id(test_db: AsyncSession):
    result = await get_ticket(test_db, ticket_id=uuid.uuid4())
    assert result is None


@pytest.mark.asyncio
async def test_list_tickets_filters_by_account(test_db: AsyncSession):
    account_a = await _make_account(test_db)
    account_b = await _make_account(test_db)
    l1_a = await _make_user(test_db, account_id=account_a.id)
    l1_b = await _make_user(test_db, account_id=account_b.id)
    ticket_a = await create_ticket(
        test_db, account_id=account_a.id, created_by_user_id=l1_a.id,
        problem_statement="A",
    )
    ticket_b = await create_ticket(
        test_db, account_id=account_b.id, created_by_user_id=l1_b.id,
        problem_statement="B",
    )
    rows = await list_tickets_for_account(test_db, account_id=account_a.id)
    ids = [r.id for r in rows]
    assert ticket_a.id in ids
    assert ticket_b.id not in ids


@pytest.mark.asyncio
async def test_list_tickets_filters_by_status(test_db: AsyncSession):
    account = await _make_account(test_db)
    l1 = await _make_user(test_db, account_id=account.id)
    open_t = await create_ticket(
        test_db, account_id=account.id, created_by_user_id=l1.id,
        problem_statement="open",
    )
    resolved_t = await create_ticket(
        test_db, account_id=account.id, created_by_user_id=l1.id,
        problem_statement="r",
    )
    await update_status(test_db, ticket_id=resolved_t.id, status='resolved')
    open_rows = await list_tickets_for_account(test_db, account_id=account.id, status='open')
    assert open_t.id in [r.id for r in open_rows]
    assert resolved_t.id not in [r.id for r in open_rows]


@pytest.mark.asyncio
async def test_promote_to_psa_sets_external_id(test_db: AsyncSession):
    account = await _make_account(test_db)
    l1 = await _make_user(test_db, account_id=account.id)
    ticket = await create_ticket(
        test_db, account_id=account.id, created_by_user_id=l1.id,
        problem_statement="x",
    )
    updated = await promote_to_psa(test_db, ticket_id=ticket.id, psa_ticket_id="CW-12345")
    assert updated.psa_promoted_ticket_id == "CW-12345"


@pytest.mark.asyncio
async def test_update_status_raises_for_missing_ticket(test_db: AsyncSession):
    with pytest.raises(ValueError, match="not found"):
        await update_status(test_db, ticket_id=uuid.uuid4(), status='resolved')