"""
Pytest fixtures for the JQC test suite.

IMPORTANT: config.py evaluates `_require_env('SECRET_KEY')` / `DATABASE_URL` at
import time, so the required environment variables must be set *before* anything
imports `app` or `config`. pytest imports this conftest before collecting any
test module, so setting them at module top here is sufficient — the
TestingConfig then overrides the DB URI with in-memory SQLite regardless.
"""
import os

os.environ.setdefault('SECRET_KEY', 'test-secret-key')
os.environ.setdefault('DATABASE_URL', 'sqlite://')   # overridden by TestingConfig
os.environ.setdefault('DIGEST_SECRET', 'test-digest-secret')

from datetime import timedelta

import pytest

from app import create_app, db as _db
from app.utils.time_utils import now_eastern

# Import model modules so their tables are registered on the metadata before
# create_all() runs (they are also imported transitively via blueprints).
from app.models.user import User
from app.models.project import Project
from app.models.facility import Facility, Area
from app.models.inspection import InspectionTemplate, Inspection
from app.models.issue import Issue


# ── Core fixtures ─────────────────────────────────────────────────────────────

@pytest.fixture(scope='session')
def _app():
    """Build the Flask app exactly once for the whole session.

    create_app() cannot be called more than once per process: register_api()
    attaches sub-blueprints to the module-level `api_bp` singleton, and Flask
    forbids re-registering a blueprint. So the app object is session-scoped.
    """
    return create_app('testing')


@pytest.fixture
def app(_app):
    """A fresh app context + empty in-memory schema for each test.

    A NEW app context is pushed per test (not once per session): Flask-Login
    caches the current user in `g`, which is bound to the app context, so a
    shared context would leak an authenticated user from one test into the next.
    """
    with _app.app_context():
        _db.create_all()
        try:
            yield _app
        finally:
            _db.session.remove()
            _db.drop_all()


@pytest.fixture
def db(app):
    """The active SQLAlchemy session, bound to the per-test app context."""
    return _db


@pytest.fixture
def client(app):
    """A Flask test client for the per-test app."""
    return app.test_client()


@pytest.fixture
def login(client):
    """Return a helper that logs the given user in via the real login route.

    Usage:  login(user, password='pw')
    CSRF is disabled in TestingConfig, so a plain form POST authenticates.
    """
    def _login(user, password='pw'):
        # Don't follow the redirect: the session cookie is already set on the
        # 302 response, and this avoids coupling the helper to whatever the
        # post-login landing page renders.
        return client.post(
            '/auth/login',
            data={'username': user.username, 'password': password},
            follow_redirects=False,
        )
    return _login


# ── Model factory helpers ─────────────────────────────────────────────────────
# Small builders that commit and return a persisted row. Kept deliberately thin;
# tests pass only the attributes they care about.

_counter = {'n': 0}


def _uniq():
    _counter['n'] += 1
    return _counter['n']


@pytest.fixture
def make_user(db):
    def _make(role='inspector', password='pw', username=None, **kw):
        n = _uniq()
        user = User(
            username=username or f'{role}{n}',
            email=kw.pop('email', f'{role}{n}@example.com'),
            full_name=kw.pop('full_name', None),
            role=role,
            active=kw.pop('active', True),
        )
        user.set_password(password)
        for k, v in kw.items():
            setattr(user, k, v)
        db.session.add(user)
        db.session.commit()
        return user
    return _make


@pytest.fixture
def make_facility(db):
    def _make(active=True, project=None, with_token=True, **kw):
        n = _uniq()
        fac = Facility(
            name=kw.pop('name', f'Facility {n}'),
            address=kw.pop('address', f'{n} Test St'),
            active=active,
            project_id=project.id if project else None,
        )
        if with_token:
            fac.ensure_public_token()
        for k, v in kw.items():
            setattr(fac, k, v)
        db.session.add(fac)
        db.session.commit()
        return fac
    return _make


@pytest.fixture
def make_area(db):
    def _make(facility, with_token=True, **kw):
        n = _uniq()
        area = Area(
            facility_id=facility.id,
            name=kw.pop('name', f'Area {n}'),
            area_type=kw.pop('area_type', 'restroom'),
        )
        if with_token:
            area.ensure_public_token()
        for k, v in kw.items():
            setattr(area, k, v)
        db.session.add(area)
        db.session.commit()
        return area
    return _make


@pytest.fixture
def make_template(db):
    def _make(**kw):
        n = _uniq()
        tpl = InspectionTemplate(
            name=kw.pop('name', f'Template {n}'),
            active=kw.pop('active', True),
        )
        for k, v in kw.items():
            setattr(tpl, k, v)
        db.session.add(tpl)
        db.session.commit()
        return tpl
    return _make


@pytest.fixture
def make_inspection(db):
    def _make(facility, inspector, template, area=None,
              status='completed', overall_score=90.0, days_ago=5, **kw):
        insp = Inspection(
            template_id=template.id,
            facility_id=facility.id,
            area_id=area.id if area else None,
            inspector_id=inspector.id,
            inspection_date=now_eastern() - timedelta(days=days_ago),
            overall_score=overall_score,
            status=status,
        )
        for k, v in kw.items():
            setattr(insp, k, v)
        db.session.add(insp)
        db.session.commit()
        return insp
    return _make


@pytest.fixture
def make_issue(db):
    def _make(facility=None, area=None, status='open', severity='medium',
              description='Test issue', **kw):
        issue = Issue(
            facility_id=facility.id if facility else None,
            area_id=area.id if area else None,
            status=status,
            severity=severity,
            description=description,
            reported_at=kw.pop('reported_at', now_eastern()),
        )
        for k, v in kw.items():
            setattr(issue, k, v)
        db.session.add(issue)
        db.session.commit()
        return issue
    return _make