# -*- coding: utf-8 -*-
"""
SHBL-CRM Integration Tests
Module 3: Business Logic + AI Workflow

Test 1: POST /api/v1/logs - Event-driven AI background task
Test 2: GET /api/v1/reports/monthly - SQL pre-aggregation + AI report

Prerequisites:
  - Backend running: uvicorn app.main:app (port 8000)
  - PostgreSQL + Alembic migration applied
  - Ollama node reachable (for AI tests)

Run: pytest tests/test_api_integration.py -v -s
"""

import asyncio
import logging
import uuid

import httpx
import pytest
import pytest_asyncio

# ---- Logging setup for test output ----
logging.basicConfig(
    level=logging.INFO,
    format="%(asctime)s | %(name)-12s | %(levelname)-5s | %(message)s",
)
logger = logging.getLogger("test_integration")

# ---- Config ----
BASE_URL = "http://127.0.0.1:8000/api/v1"

# Test fixtures: pre-seeded client & auth
# Must insert a test client into DB before running,
# or use the seed script. This UUID will be used for all tests.
TEST_CLIENT_ID: str | None = None  # Populated by fixture
TEST_TOKEN: str | None = None      # Populated by fixture


# ============================================================
# Fixtures
# ============================================================

@pytest_asyncio.fixture(scope="module")
async def seed_test_data():
    """
    Seed a test client and admin user into the database,
    then authenticate to get a JWT token.
    """
    global TEST_CLIENT_ID, TEST_TOKEN

    # Create admin user + test client via direct DB insert
    import psycopg2
    import bcrypt

    admin_hash = bcrypt.hashpw(b"admin123", bcrypt.gensalt()).decode("utf-8")
    test_client_uuid = str(uuid.uuid4())

    conn = psycopg2.connect(
        host="192.168.1.85",
        port=5432,
        user="admin",
        password="admin_password_2026",
        dbname="lubrication_crm",
    )
    cur = conn.cursor()

    # Seed admin user (idempotent)
    cur.execute("""
        INSERT INTO users (id, username, password_hash, role, is_active)
        VALUES (%s, 'test_admin', %s, 'admin', true)
        ON CONFLICT (username) DO UPDATE SET password_hash = EXCLUDED.password_hash
    """, (str(uuid.uuid4()), admin_hash))

    # Seed test client
    cur.execute("""
        INSERT INTO clients (id, name, contact_person, phone)
        VALUES (%s, 'Test_Integration_Client', 'Zhang San', '13800138000')
    """, (test_client_uuid,))

    conn.commit()
    cur.close()
    conn.close()

    TEST_CLIENT_ID = test_client_uuid

    # Authenticate to get JWT token
    async with httpx.AsyncClient(base_url=BASE_URL, timeout=10.0) as client:
        resp = await client.post("/auth/login", json={
            "username": "test_admin",
            "password": "admin123",
        })
        assert resp.status_code == 200, f"Login failed: {resp.text}"
        TEST_TOKEN = resp.json()["access_token"]
        logger.info("Auth token acquired for test_admin")

    yield

    # Cleanup: remove test data
    conn = psycopg2.connect(
        host="192.168.1.85", port=5432, user="admin",
        password="admin_password_2026", dbname="lubrication_crm",
    )
    cur = conn.cursor()
    cur.execute("DELETE FROM customer_tags WHERE customer_id = %s", (test_client_uuid,))
    cur.execute("DELETE FROM follow_up_todos WHERE customer_id = %s", (test_client_uuid,))
    cur.execute("DELETE FROM customer_logs WHERE customer_id = %s", (test_client_uuid,))
    cur.execute("DELETE FROM sales_opportunities WHERE customer_id = %s", (test_client_uuid,))
    cur.execute("DELETE FROM clients WHERE id = %s", (test_client_uuid,))
    conn.commit()
    cur.close()
    conn.close()
    logger.info("Test data cleaned up")


# ============================================================
# Test Case 1: POST /api/v1/logs + AI Background Task
# ============================================================

@pytest.mark.asyncio
async def test_create_log_and_ai_background_task(seed_test_data):
    """
    Test the event-driven AI processing pipeline:
    1. POST log → 200 OK (immediate)
    2. Wait for BackgroundTasks to call Ollama
    3. Verify tags & todos were written to DB
    """
    assert TEST_TOKEN, "Auth token missing"
    assert TEST_CLIENT_ID, "Test client ID missing"

    headers = {"Authorization": f"Bearer {TEST_TOKEN}"}
    log_content = "今天拜访了张总，客户对价格敏感，要求下周二前给折扣方案"

    # ---- Step 1: Submit log ----
    async with httpx.AsyncClient(base_url=BASE_URL, timeout=15.0) as client:
        resp = await client.post(
            "/logs",
            json={
                "customer_id": TEST_CLIENT_ID,
                "content": log_content,
            },
            headers=headers,
        )

    # ---- Assert 1: Immediate response ----
    assert resp.status_code == 200, f"Expected 200, got {resp.status_code}: {resp.text}"
    data = resp.json()
    assert "id" in data, "Response missing 'id' field"
    log_id = data["id"]
    logger.info("Log submitted successfully: id=%s", log_id)

    # ---- Step 2: Wait for AI background task ----
    # BackgroundTasks calls Ollama (qwen3:14b), may take 5-30s
    logger.info("Waiting 10s for AI background processing...")
    await asyncio.sleep(10)

    # ---- Assert 2: Verify DB side effects ----
    import psycopg2
    conn = psycopg2.connect(
        host="192.168.1.85", port=5432, user="admin",
        password="admin_password_2026", dbname="lubrication_crm",
    )
    cur = conn.cursor()

    # Check customer_tags
    cur.execute(
        "SELECT tag_name FROM customer_tags WHERE customer_id = %s",
        (TEST_CLIENT_ID,),
    )
    tags = [r[0] for r in cur.fetchall()]
    logger.info("Generated tags: %s", tags)

    # Check follow_up_todos
    cur.execute(
        "SELECT task_desc, status FROM follow_up_todos WHERE customer_id = %s",
        (TEST_CLIENT_ID,),
    )
    todos = cur.fetchall()
    logger.info("Generated todos: %s", todos)

    cur.close()
    conn.close()

    # AI may or may not succeed (Ollama connectivity),
    # but if it did, we should see results.
    # Use soft assertion: log warning if empty, don't fail hard
    # (Ollama node might be unreachable in test env)
    if tags:
        assert len(tags) <= 3, f"Expected at most 3 tags, got {len(tags)}"
        logger.info("PASS: AI generated %d tag(s)", len(tags))
    else:
        logger.warning(
            "WARNING: No tags generated. "
            "Check Ollama connectivity and backend logs for errors."
        )

    if todos:
        assert todos[0][1] == "pending", "Todo status should be 'pending'"
        logger.info("PASS: AI generated todo: %s", todos[0][0][:80])
    else:
        logger.warning(
            "WARNING: No todos generated. "
            "Check Ollama connectivity and backend logs for errors."
        )


# ============================================================
# Test Case 2: GET /api/v1/reports/monthly
# ============================================================

@pytest.mark.asyncio
async def test_monthly_sales_report_generation(seed_test_data):
    """
    Test SQL pre-aggregation + AI report generation:
    1. GET /reports/monthly → 200
    2. Response contains metrics list + report string
    """
    assert TEST_TOKEN, "Auth token missing"

    headers = {"Authorization": f"Bearer {TEST_TOKEN}"}

    # ---- Step 1: Request monthly report ----
    # This is a synchronous wait for AI generation, set generous timeout
    async with httpx.AsyncClient(base_url=BASE_URL, timeout=90.0) as client:
        logger.info("Requesting monthly report (may take 30-60s for AI generation)...")
        resp = await client.get("/reports/monthly", headers=headers)

    # ---- Assert 1: Status code ----
    assert resp.status_code == 200, f"Expected 200, got {resp.status_code}: {resp.text}"

    data = resp.json()
    logger.info("Report response received (%d bytes)", len(resp.text))

    # ---- Assert 2: Response structure ----
    assert "metrics" in data, "Response missing 'metrics' field"
    assert "report" in data, "Response missing 'report' field"
    assert isinstance(data["metrics"], list), "'metrics' should be a list"
    assert isinstance(data["report"], str), "'report' should be a string"
    assert len(data["report"]) > 0, "'report' should be non-empty"

    logger.info("Metrics: %s", data["metrics"])
    logger.info("Report preview: %s...", data["report"][:200])
    logger.info("PASS: Monthly report generated (%d chars)", len(data["report"]))