import os
import sys
from pathlib import Path

import pytest
from fastapi.testclient import TestClient

# Ensure required env vars for app import/config
os.environ.setdefault("SECRET_KEY", "x" * 32)
os.environ.setdefault("DATABASE_URL", "sqlite:////tmp/delphi_test.sqlite")

# Ensure repository root on sys.path for direct test runs
ROOT = Path(__file__).resolve().parents[1]
if str(ROOT) not in sys.path:
    sys.path.insert(0, str(ROOT))

from app.main import app  # noqa: E402
from app.auth.security import get_current_user  # noqa: E402
from tests.helpers import assert_validation_error  # noqa: E402
from app.config import settings  # noqa: E402


@pytest.fixture(scope="module")
def client():
    # Override auth to bypass JWT for these tests
    class _User:
        def __init__(self):
            self.id = "test"
            self.username = "tester"
            self.is_admin = True
            self.is_active = True

    app.dependency_overrides[get_current_user] = lambda: _User()

    # Disable cache to make validation tests deterministic
    settings.cache_enabled = False

    try:
        yield TestClient(app)
    finally:
        app.dependency_overrides.pop(get_current_user, None)


def test_advanced_search_invalid_search_types(client: TestClient):
    payload = {
        "query": "anything",
        "search_types": ["customer", "bogus"],
    }
    resp = client.post("/api/search/advanced", json=payload)
    assert_validation_error(resp, "search_types")


def test_advanced_search_invalid_sort_options(client: TestClient):
    # Invalid sort_by
    payload = {
        "query": "x",
        "search_types": ["customer"],
        "sort_by": "nope",
    }
    resp = client.post("/api/search/advanced", json=payload)
    assert_validation_error(resp, "sort_by")

    # Invalid sort_order
    payload = {
        "query": "x",
        "search_types": ["customer"],
        "sort_order": "sideways",
    }
    resp = client.post("/api/search/advanced", json=payload)
    assert_validation_error(resp, "sort_order")


def test_advanced_search_limit_bounds(client: TestClient):
    # Too low
    payload = {
        "query": "x",
        "search_types": ["customer"],
        "limit": 0,
    }
    resp = client.post("/api/search/advanced", json=payload)
    assert_validation_error(resp, "limit")

    # Too high
    payload["limit"] = 201
    resp = client.post("/api/search/advanced", json=payload)
    assert_validation_error(resp, "limit")


def test_advanced_search_conflicting_flags_exact_phrase_and_whole_words(client: TestClient):
    payload = {
        "query": "apple pie",
        "search_types": ["file"],
        "exact_phrase": True,
        "whole_words": True,
    }
    resp = client.post("/api/search/advanced", json=payload)
    # Cannot rely on field location for model-level validation, check message text in details
    assert resp.status_code == 422
    body = resp.json()
    assert body.get("success") is False
    assert body.get("error", {}).get("code") == "validation_error"
    msgs = [d.get("msg", "") for d in body.get("error", {}).get("details", [])]
    assert any("exact_phrase and whole_words" in m for m in msgs)


def test_advanced_search_inverted_date_range(client: TestClient):
    payload = {
        "search_types": ["file"],
        "date_field": "created",
        "date_from": "2024-02-01",
        "date_to": "2024-01-31",
    }
    resp = client.post("/api/search/advanced", json=payload)
    assert resp.status_code == 422
    body = resp.json()
    assert body.get("success") is False
    assert body.get("error", {}).get("code") == "validation_error"
    msgs = [d.get("msg", "") for d in body.get("error", {}).get("details", [])]
    assert any("date_from must be less than or equal to date_to" in m for m in msgs)


def test_advanced_search_inverted_amount_range(client: TestClient):
    payload = {
        "search_types": ["file"],
        "amount_field": "amount",
        "amount_min": 100.0,
        "amount_max": 50.0,
    }
    resp = client.post("/api/search/advanced", json=payload)
    assert resp.status_code == 422
    body = resp.json()
    assert body.get("success") is False
    assert body.get("error", {}).get("code") == "validation_error"
    msgs = [d.get("msg", "") for d in body.get("error", {}).get("details", [])]
    assert any("amount_min must be less than or equal to amount_max" in m for m in msgs)


def test_advanced_search_date_field_supported_per_type(client: TestClient):
    # 'opened' is only valid for files
    payload = {
        "search_types": ["customer", "ledger"],
        "date_field": "opened",
        "date_from": "2024-01-01",
        "date_to": "2024-12-31",
    }
    resp = client.post("/api/search/advanced", json=payload)
    assert resp.status_code == 422
    body = resp.json()
    msgs = [d.get("msg", "") for d in body.get("error", {}).get("details", [])]
    assert any("date_field 'opened' is not supported" in m for m in msgs)

    # Valid when 'file' included
    payload["search_types"] = ["file"]
    resp = client.post("/api/search/advanced", json=payload)
    assert resp.status_code == 200


def test_advanced_search_amount_field_supported_per_type(client: TestClient):
    # 'amount' is only valid for ledger
    payload = {
        "search_types": ["file"],
        "amount_field": "amount",
        "amount_min": 1,
        "amount_max": 10,
    }
    resp = client.post("/api/search/advanced", json=payload)
    assert resp.status_code == 422
    body = resp.json()
    msgs = [d.get("msg", "") for d in body.get("error", {}).get("details", [])]
    assert any("amount_field 'amount' is not supported" in m for m in msgs)

    # Valid when 'ledger' included
    payload["search_types"] = ["ledger"]
    resp = client.post("/api/search/advanced", json=payload)
    assert resp.status_code == 200