"""Tests for the technician-performance dashboard and the ``Tech #N`` fix.

Anchors two Wahab-facing defects/requests:

1. The FM dashboard built its "Technician Workload" card from
   ``Tech #<user id>`` instead of the technician's real name. The template must
   use ``assigned_technician_name`` (the same field ``/tickets`` already uses),
   and no template may reintroduce a ``Tech #`` placeholder.
2. ``GET /api/tickets/tech-performance`` reports per-technician workload and
   outcomes by real name: totals, per-status buckets, completion rate and
   ``created_at -> closed_at`` resolution times. Everything derives from
   existing ticket columns — no schema change.
"""

from __future__ import annotations

from datetime import datetime
from pathlib import Path

import pytest
from sqlalchemy import select

from app.core.database import async_session_factory
from app.models.ticket import Ticket
from app.models.user import User

pytestmark = pytest.mark.asyncio

TEMPLATES_DIR = Path(__file__).resolve().parent.parent / "app" / "templates"


async def _login(client, email: str = "wahab@denya.com", password: str = "denya123") -> str:
    resp = await client.post("/api/auth/login", json={"email": email, "password": password})
    assert resp.status_code == 200, resp.text
    return resp.json()["access_token"]


def _auth(token: str) -> dict[str, str]:
    return {"Authorization": f"Bearer {token}"}


async def _user_id(email: str) -> int:
    async with async_session_factory() as session:
        user = (
            await session.execute(select(User).where(User.email == email))
        ).scalar_one()
        return user.id


async def _seed_tickets(specs: list[dict]) -> None:
    """Insert tickets directly so tests control status/timestamps exactly."""
    async with async_session_factory() as session:
        for i, spec in enumerate(specs):
            session.add(Ticket(ticket_number=f"PAV-PERF-{i:05d}", **spec))
        await session.commit()


async def _make_user(email: str, full_name: str, role: str = "Tech") -> int:
    """Create a user directly (no API) so tests can build same-name technicians."""
    async with async_session_factory() as session:
        user = User(email=email, password_hash="not-a-real-hash", full_name=full_name, role=role)
        session.add(user)
        await session.commit()
        await session.refresh(user)
        return user.id


def _ticket(status: str, assigned_to: int | None, *, created_at: datetime | None = None,
            closed_at: datetime | None = None) -> dict:
    spec: dict = {
        "status": status,
        "priority": "medium",
        "description": f"{status} ticket",
        "assigned_to": assigned_to,
    }
    if created_at is not None:
        spec["created_at"] = created_at
    if closed_at is not None:
        spec["closed_at"] = closed_at
    return spec


# ── 3a. 'Tech #N' regression ─────────────────────────────────────────
async def test_fm_dashboard_workload_uses_real_technician_names(client):
    """The FM dashboard must build the workload card from the real name field."""
    resp = await client.get("/dashboard/fm")
    assert resp.status_code == 200
    body = resp.text
    assert "Tech #" not in body
    assert "assigned_technician_name" in body


async def test_no_template_reintroduces_tech_id_placeholder():
    """Sweep every template for the ``Tech #<id>`` placeholder."""
    offenders = [
        str(path.relative_to(TEMPLATES_DIR))
        for path in TEMPLATES_DIR.rglob("*.html")
        if "Tech #" in path.read_text(encoding="utf-8")
    ]
    assert offenders == []


# ── Page + route wiring ──────────────────────────────────────────────
async def test_tech_performance_page_is_same_origin(client):
    """The new dashboard is reachable and uses only same-origin assets."""
    resp = await client.get("/dashboard/tech-performance")
    assert resp.status_code == 200
    body = resp.text
    assert "/api/tickets/tech-performance" in body
    assert "https://" not in body
    assert "cdn." not in body


async def test_base_nav_links_fm_and_ceo_to_tech_performance(client):
    """FM and CEO navigation exposes the report."""
    for path in ("/dashboard/fm", "/dashboard/ceo"):
        body = (await client.get(path)).text
        assert "/dashboard/tech-performance" in body


async def test_tech_performance_requires_auth(client):
    """The aggregate endpoint is bearer-gated, like other dashboard data paths."""
    resp = await client.get("/api/tickets/tech-performance")
    assert resp.status_code == 401


async def test_tech_performance_route_not_shadowed_by_ticket_id(client):
    """`/tech-performance` is a literal route, not an int ticket id (no 422)."""
    token = await _login(client)
    resp = await client.get("/api/tickets/tech-performance", headers=_auth(token))
    assert resp.status_code == 200


# ── 3b. Aggregation ──────────────────────────────────────────────────
async def test_tech_performance_empty_state(client):
    """No assigned tickets → empty rows and a fully zeroed roll-up."""
    token = await _login(client)
    resp = await client.get("/api/tickets/tech-performance", headers=_auth(token))
    assert resp.status_code == 200
    data = resp.json()
    assert data["technicians"] == []
    assert data["totals"]["technicians"] == 0
    assert data["totals"]["total_assigned"] == 0
    assert data["totals"]["completion_rate"] == 0.0
    assert data["totals"]["avg_resolution_hours"] is None


async def test_tech_performance_aggregates_by_real_name(client):
    """Counts, completion rate, aging, sorting and totals per technician."""
    prosper = await _user_id("prosper@denya.com")
    sam = await _user_id("sam@denya.com")

    await _seed_tickets(
        [
            # Prosper: 2 completed (one timestamped), 1 escalated, 1 in progress, 1 cancelled
            _ticket("Completed", prosper, created_at=datetime(2026, 1, 1, 0, 0),
                    closed_at=datetime(2026, 1, 1, 10, 0)),
            _ticket("Completed", prosper),
            _ticket("Escalated", prosper),
            _ticket("In Progress", prosper),
            _ticket("Cancelled", prosper),
            # Sam: 3 closed (timestamped), 1 assigned, 1 awaiting verification
            _ticket("Closed", sam, created_at=datetime(2026, 1, 1, 0, 0),
                    closed_at=datetime(2026, 1, 2, 0, 0)),
            _ticket("Closed", sam, created_at=datetime(2026, 1, 1, 0, 0),
                    closed_at=datetime(2026, 1, 3, 0, 0)),
            _ticket("Closed", sam, created_at=datetime(2026, 1, 1, 0, 0),
                    closed_at=datetime(2026, 1, 4, 0, 0)),
            _ticket("Assigned", sam),
            _ticket("On-Field Verification", sam),
            # Unassigned tickets are reported separately, never as a fake technician.
            _ticket("Logged", None),
            _ticket("New", None),
        ]
    )

    token = await _login(client)
    resp = await client.get("/api/tickets/tech-performance", headers=_auth(token))
    assert resp.status_code == 200
    data = resp.json()

    by_name = {t["name"]: t for t in data["technicians"]}
    assert set(by_name) == {"Prosper", "Sam"}
    assert all("Tech #" not in name for name in by_name)

    prosper_row = by_name["Prosper"]
    assert prosper_row["technician_id"] == prosper
    assert prosper_row["total_assigned"] == 5
    assert prosper_row["completed"] == 2
    assert prosper_row["closed"] == 0
    assert prosper_row["in_progress"] == 1
    assert prosper_row["escalated"] == 1
    assert prosper_row["cancelled"] == 1
    assert prosper_row["pending"] == 0
    # Buckets always reconcile with the assigned total.
    assert (
        prosper_row["completed"] + prosper_row["in_progress"] + prosper_row["escalated"]
        + prosper_row["cancelled"] + prosper_row["pending"]
    ) == prosper_row["total_assigned"]
    assert prosper_row["open_tickets"] == 2
    assert prosper_row["completion_rate"] == 40.0
    assert prosper_row["avg_resolution_hours"] == 10.0
    assert prosper_row["resolved_with_timestamps"] == 1
    assert prosper_row["resolved_without_timestamps"] == 1
    assert prosper_row["status_breakdown"] == {"Completed": 2, "Cancelled": 1, "Escalated": 1, "In Progress": 1}

    sam_row = by_name["Sam"]
    assert sam_row["total_assigned"] == 5
    assert sam_row["completed"] == 3
    assert sam_row["closed"] == 3
    assert sam_row["in_progress"] == 0
    assert sam_row["pending"] == 2
    assert sam_row["open_tickets"] == 2
    assert sam_row["completion_rate"] == 60.0
    assert sam_row["avg_resolution_hours"] == 48.0
    assert sam_row["resolved_without_timestamps"] == 0
    assert sam_row["status_breakdown"] == {"Closed": 3, "Assigned": 1, "On-Field Verification": 1}

    # Sorted by completed desc → Sam first.
    assert [t["name"] for t in data["technicians"]] == ["Sam", "Prosper"]

    totals = data["totals"]
    assert totals["technicians"] == 2
    assert totals["total_assigned"] == 10
    assert totals["completed"] == 5
    assert totals["closed"] == 3
    assert totals["in_progress"] == 1
    assert totals["escalated"] == 1
    assert totals["cancelled"] == 1
    assert totals["pending"] == 2
    assert totals["open_tickets"] == 4
    assert totals["completion_rate"] == 50.0
    # Fleet average is weighted over tickets, not an average of per-tech averages.
    assert totals["avg_resolution_hours"] == 38.5
    assert totals["resolved_with_timestamps"] == 4
    assert totals["resolved_without_timestamps"] == 1
    assert totals["unassigned_tickets"] == 2
    assert totals["total_tickets"] == 12


async def test_tech_performance_reports_counts_when_timestamps_absent(client):
    """Finished tasks without ``closed_at`` yield no average but a count."""
    afful = await _user_id("afful@denya.com")
    await _seed_tickets([
        _ticket("Completed", afful),
        _ticket("Closed", afful),
        _ticket("Completed", afful),
    ])

    token = await _login(client)
    resp = await client.get("/api/tickets/tech-performance", headers=_auth(token))
    row = next(t for t in resp.json()["technicians"] if t["name"] == "Afful")
    assert row["completed"] == 3
    assert row["closed"] == 1
    assert row["avg_resolution_hours"] is None
    assert row["resolved_with_timestamps"] == 0
    assert row["resolved_without_timestamps"] == 3


async def test_tech_performance_groups_same_name_by_user_id(client):
    """Two technicians sharing a display name stay separate rows."""
    first = await _make_user("kwame.one@denya.com", "Kwame Mensah")
    second = await _make_user("kwame.two@denya.com", "Kwame Mensah")
    await _seed_tickets([
        _ticket("Completed", first),
        _ticket("Completed", second),
        _ticket("Escalated", second),
    ])

    token = await _login(client)
    resp = await client.get("/api/tickets/tech-performance", headers=_auth(token))
    rows = [t for t in resp.json()["technicians"] if t["name"] == "Kwame Mensah"]
    assert len(rows) == 2
    assert {r["technician_id"] for r in rows} == {first, second}
    by_id = {r["technician_id"]: r for r in rows}
    assert by_id[first]["total_assigned"] == 1
    assert by_id[second]["total_assigned"] == 2
    assert by_id[second]["escalated"] == 1