"""Unit tests for the assist session API + lifecycle (TASK-02-05).

Covers SLICE-02:
  - POST /api/assist/shift/start → 200 + shift_id + context + consent_disclosure
  - Mode-conflict: starting a shift during an active practice session → 409
  - POST /api/assist/shift/end → 200 + turn_count + guardrail_block_count
  - GET /api/assist/shift/active → active shift or {active: false}
  - 8h auto-end (mock time)
  - Consent disclosure present in the start response
  - Routes return JSON (not index.html — matched before StaticFiles)
"""

from __future__ import annotations

import asyncio
import datetime as _dt
import json
import os
from pathlib import Path
from unittest.mock import patch

import pytest
from fastapi import FastAPI
from fastapi.testclient import TestClient

from db.migrate import apply_migrations
from db.store import PraxisStore, HARDCODED_LEARNER_ID
from server.assist.consent import get_consent_disclosure
from server.assist.lifecycle import ShiftLifecycleManager
from server.assist.routes import router as assist_router


@pytest.fixture
def app_with_store(tmp_path: Path):
    """Build a FastAPI app with the assist router + a temp SQLite store."""
    db = tmp_path / "test_assist_routes.db"
    apply_migrations(db)
    store = PraxisStore(db)
    asyncio.run(store.init())

    app = FastAPI()
    app.state.praxis_store = store
    app.state.pg_store = None
    app.state.assist_shifts = {}
    app.include_router(assist_router)
    return app, store


def test_shift_start_returns_200(app_with_store):
    app, store = app_with_store
    client = TestClient(app)
    res = client.post(
        "/api/assist/shift/start",
        json={"path_slug": "customer_service", "scenario_tag": "damaged-product refund"},
    )
    assert res.status_code == 200
    data = res.json()
    assert "shift_id" in data
    assert data["context"]["scenario_tag"] == "damaged-product refund"
    assert "consent_disclosure" in data
    assert "mic is active" in data["consent_disclosure"]


def test_shift_start_409_on_active_practice(app_with_store):
    app, store = app_with_store
    # Seed an active practice session.
    asyncio.run(
        store.start_session_typed(HARDCODED_LEARNER_ID, "cs_refund_ca_v01", "practice")
    )
    client = TestClient(app)
    res = client.post(
        "/api/assist/shift/start",
        json={"path_slug": "customer_service", "scenario_tag": "escalation"},
    )
    assert res.status_code == 409
    assert "practice session is active" in res.json()["detail"]


def test_shift_end_returns_200(app_with_store):
    app, store = app_with_store
    client = TestClient(app)
    # Start a shift.
    start = client.post(
        "/api/assist/shift/start",
        json={"path_slug": "customer_service", "scenario_tag": "escalation"},
    )
    assert start.status_code == 200
    shift_id = start.json()["shift_id"]
    # End it.
    end = client.post(
        "/api/assist/shift/end",
        json={"shift_id": shift_id, "outcome": "completed"},
    )
    assert end.status_code == 200
    data = end.json()
    assert data["ok"] is True
    assert "turn_count" in data
    assert "guardrail_block_count" in data


def test_shift_active_returns_active_shift(app_with_store):
    app, store = app_with_store
    client = TestClient(app)
    # No active shift → {active: false}.
    res = client.get("/api/assist/shift/active")
    assert res.status_code == 200
    assert res.json() == {"active": False}
    # Start a shift.
    start = client.post(
        "/api/assist/shift/start",
        json={"path_slug": "customer_service", "scenario_tag": "policy exception"},
    )
    shift_id = start.json()["shift_id"]
    # Now active.
    res = client.get("/api/assist/shift/active")
    assert res.status_code == 200
    data = res.json()
    assert data["active"] is True
    assert data["shift_id"] == shift_id


def test_routes_return_json_not_index_html(app_with_store):
    """Routes return JSON (not index.html — matched before StaticFiles)."""
    app, store = app_with_store
    client = TestClient(app)
    res = client.get("/api/assist/shift/active")
    assert res.headers["content-type"].startswith("application/json")
    assert res.json() == {"active": False}


def test_consent_disclosure_text():
    """get_consent_disclosure() returns the disclosure text (D-070)."""
    text = get_consent_disclosure()
    assert "mic is active" in text.lower() or "microphone" in text.lower()
    assert "consent laws" in text.lower()
    assert "end the shift" in text.lower()


def test_auto_end_after_8h(app_with_store, tmp_path: Path):
    """A shift started 9h ago is auto-ended on the next check_auto_end() run."""
    app, store = app_with_store
    # Start a shift, then backdate the started_at timestamp.
    client = TestClient(app)
    start = client.post(
        "/api/assist/shift/start",
        json={"path_slug": "customer_service", "scenario_tag": "escalation"},
    )
    shift_id = start.json()["shift_id"]
    # Backdate started_at to 9 hours ago.
    old_time = (_dt.datetime.now(_dt.timezone.utc) - _dt.timedelta(hours=9)).strftime(
        "%Y-%m-%d %H:%M:%S"
    )
    import sqlite3

    conn = sqlite3.connect(str(store.db_path))
    conn.execute("UPDATE sessions SET started_at = ? WHERE id = ?", (old_time, shift_id))
    conn.commit()
    conn.close()

    mgr = ShiftLifecycleManager(store, max_shift_hours=8)
    ended = asyncio.run(mgr.check_auto_end())
    assert shift_id in ended
    # The session row should now have outcome='auto_ended'.
    row = asyncio.run(store.get_session(shift_id))
    assert row is not None
    assert row.outcome == "auto_ended"
    assert row.ended_at is not None


def test_auto_end_does_not_touch_recent_shifts(app_with_store):
    """A shift started 1h ago is NOT auto-ended."""
    app, store = app_with_store
    client = TestClient(app)
    start = client.post(
        "/api/assist/shift/start",
        json={"path_slug": "customer_service", "scenario_tag": "escalation"},
    )
    shift_id = start.json()["shift_id"]
    mgr = ShiftLifecycleManager(store, max_shift_hours=8)
    ended = asyncio.run(mgr.check_auto_end())
    assert shift_id not in ended