"""Phase 3 platform primitives: version gates, permissions, data models,
declarative jobs, socket extension point, and data-purge on uninstall.

Backend plugin code normally lives at app/plugins/<slug>/ on disk and is imported
by name. To exercise the importlib-driven hooks without writing packages into the
repo, we inject synthetic modules into sys.modules under the expected names.
"""
import io
import json
import sys
import types
import zipfile

import pytest

from app import db
from app.models.plugin import InstalledPlugin
from app.services import plugin_service, extension_lifecycle
from app.plugins_sdk import permissions, sockets as sdk_sockets
import app.plugins_sdk as sdk

# Installs plugins, and plugin_service hot-loads their blueprints onto the
# live app. Flask refuses register_blueprint once an app has served a
# request, so these need a private app (plan 64 Phase 1).
pytestmark = pytest.mark.fresh_app


SLUG = 'testext'


# A plugin-owned model, defined once against the real db so it registers on the
# shared metadata a single time (extend_existing keeps re-imports harmless).
class _ExtThing(db.Model):
    __tablename__ = 'ext_testext_thing'
    __table_args__ = {'extend_existing': True}
    id = db.Column(db.Integer, primary_key=True)
    label = db.Column(db.String(40))


_job_calls = []


def _inject_plugin_modules():
    """Register synthetic app.plugins.testext.{models,jobs,sockets} modules."""
    pkg = types.ModuleType(f'app.plugins.{SLUG}')
    pkg.__path__ = []
    sys.modules[f'app.plugins.{SLUG}'] = pkg

    models_mod = types.ModuleType(f'app.plugins.{SLUG}.models')
    models_mod.register = lambda _db: [_ExtThing]
    sys.modules[f'app.plugins.{SLUG}.models'] = models_mod

    jobs_mod = types.ModuleType(f'app.plugins.{SLUG}.jobs')
    jobs_mod.reindex = lambda job: _job_calls.append(job)
    sys.modules[f'app.plugins.{SLUG}.jobs'] = jobs_mod

    sockets_mod = types.ModuleType(f'app.plugins.{SLUG}.sockets')

    def _register():
        def on_connect():
            return 'connected'
        def on_ping(data):
            return {'pong': data}
        return {'connect': on_connect, 'ping': on_ping}
    sockets_mod.register = _register
    sys.modules[f'app.plugins.{SLUG}.sockets'] = sockets_mod


@pytest.fixture
def injected_plugin():
    _inject_plugin_modules()
    yield
    for name in list(sys.modules):
        if name == f'app.plugins.{SLUG}' or name.startswith(f'app.plugins.{SLUG}.'):
            del sys.modules[name]
    _job_calls.clear()


def _plugin_row(manifest):
    p = InstalledPlugin(
        name=SLUG, display_name='Test Ext', slug=SLUG, version='1.0.0',
        status=InstalledPlugin.STATUS_ACTIVE, has_backend=True,
    )
    p.manifest = manifest
    db.session.add(p)
    db.session.commit()
    return p


# --------------------------------------------------------------------------- #
# #28 — version compat gate at install (all sources)
# --------------------------------------------------------------------------- #

def test_min_panel_version_blocks_install(app):
    manifest = {'name': 'toonew', 'display_name': 'Too New', 'version': '1.0.0',
                'min_panel_version': '999.0.0'}
    with pytest.raises(ValueError, match='needs panel'):
        plugin_service._assert_manifest_panel_compatible(manifest)


def test_no_bounds_installs_anywhere(app):
    # Missing bounds → no exception.
    plugin_service._assert_manifest_panel_compatible(
        {'name': 'x', 'display_name': 'X', 'version': '1.0.0'})


def test_sdk_exposes_panel_version(app):
    v = sdk.panel_version()
    assert isinstance(v, str) and v


# --------------------------------------------------------------------------- #
# #25 — permission enforcement
# --------------------------------------------------------------------------- #

def test_permission_gate(app):
    _plugin_row({'permissions': ['docker', 'network']})
    assert permissions.has(SLUG, 'docker') is True
    assert permissions.has(SLUG, 'shell') is False
    assert permissions.require(SLUG, 'docker') is True
    with pytest.raises(permissions.PermissionDenied):
        permissions.require(SLUG, 'shell')
    # SDK re-export points at the same gate.
    with pytest.raises(permissions.PermissionDenied):
        sdk.require_permission(SLUG, 'filesystem')


def test_unknown_permissions_flagged():
    assert permissions.unknown_permissions(['docker', 'bogus', 'agent.command:x']) == ['bogus']


# --------------------------------------------------------------------------- #
# #24 — plugin data models + purge
# --------------------------------------------------------------------------- #

def test_register_and_purge_models(app, injected_plugin):
    from sqlalchemy import inspect
    p = _plugin_row({'models': 'models:register'})

    extension_lifecycle.register_models(p, p.manifest)
    assert 'ext_testext_thing' in inspect(db.engine).get_table_names()

    dropped = extension_lifecycle.purge_models(p)
    assert dropped >= 1
    assert 'ext_testext_thing' not in inspect(db.engine).get_table_names()


# --------------------------------------------------------------------------- #
# #29 — declarative jobs (register / pause / resume / remove)
# --------------------------------------------------------------------------- #

def test_declarative_jobs_lifecycle(app, injected_plugin):
    from app.jobs import registry
    from app.jobs.models import ScheduledJob

    manifest = {
        'jobs': [{'kind': 'testext.reindex', 'handler': 'jobs:reindex'}],
        'schedules': [{'name': 'testext-nightly', 'kind': 'testext.reindex',
                       'interval_seconds': 3600}],
    }
    p = _plugin_row(manifest)

    extension_lifecycle.register_jobs(p, manifest)
    assert registry.get('testext.reindex') is not None
    sched = ScheduledJob.query.filter_by(name='testext-nightly').first()
    assert sched is not None and sched.enabled is True

    extension_lifecycle.pause_jobs(p, manifest)
    assert ScheduledJob.query.filter_by(name='testext-nightly').first().enabled is False

    extension_lifecycle.resume_jobs(p, manifest)
    assert ScheduledJob.query.filter_by(name='testext-nightly').first().enabled is True

    extension_lifecycle.remove_jobs(p, manifest)
    assert ScheduledJob.query.filter_by(name='testext-nightly').first() is None


def test_disable_enable_pauses_jobs(app, injected_plugin):
    from app.jobs.models import ScheduledJob
    manifest = {
        'schedules': [{'name': 'testext-nightly', 'kind': 'testext.reindex',
                       'interval_seconds': 3600}],
    }
    p = _plugin_row(manifest)
    extension_lifecycle.register_jobs(p, manifest)

    plugin_service.disable_plugin(p.id)
    assert ScheduledJob.query.filter_by(name='testext-nightly').first().enabled is False
    plugin_service.enable_plugin(p.id)
    assert ScheduledJob.query.filter_by(name='testext-nightly').first().enabled is True


# --------------------------------------------------------------------------- #
# #26 — Socket.IO extension point
# --------------------------------------------------------------------------- #

class _FakeIO:
    def __init__(self):
        self.registered = []
    def on_event(self, event, handler, namespace=None):
        self.registered.append((event, namespace, handler))


def test_socket_namespace_registration(app, injected_plugin, monkeypatch):
    fake = _FakeIO()
    monkeypatch.setattr('app.get_socketio', lambda: fake, raising=False)
    import app as app_pkg
    monkeypatch.setattr(app_pkg, 'get_socketio', lambda: fake)

    p = _plugin_row({'socket_entry': 'sockets:register'})
    ns = sdk_sockets.register_from_manifest(p, p.manifest)

    assert ns == f'/ext/{SLUG}'
    events = {e for e, _ns, _h in fake.registered}
    assert events == {'connect', 'ping'}
    assert all(_ns == f'/ext/{SLUG}' for _e, _ns, _h in fake.registered)


# --------------------------------------------------------------------------- #
# #30 — uninstall purge vs keep-data
# --------------------------------------------------------------------------- #

def test_uninstall_purge_drops_tables(app, injected_plugin, tmp_path, monkeypatch):
    from sqlalchemy import inspect
    monkeypatch.setattr(plugin_service, 'BACKEND_PLUGINS_DIR', str(tmp_path / 'b'))
    monkeypatch.setattr(plugin_service, 'FRONTEND_PLUGINS_DIR', str(tmp_path / 'f'))

    p = _plugin_row({'models': 'models:register'})
    extension_lifecycle.register_models(p, p.manifest)
    assert 'ext_testext_thing' in inspect(db.engine).get_table_names()

    plugin_service.uninstall_plugin(p.id, purge=True)
    assert 'ext_testext_thing' not in inspect(db.engine).get_table_names()


def test_uninstall_keep_data_leaves_tables(app, injected_plugin, tmp_path, monkeypatch):
    from sqlalchemy import inspect
    monkeypatch.setattr(plugin_service, 'BACKEND_PLUGINS_DIR', str(tmp_path / 'b'))
    monkeypatch.setattr(plugin_service, 'FRONTEND_PLUGINS_DIR', str(tmp_path / 'f'))

    p = _plugin_row({'models': 'models:register'})
    extension_lifecycle.register_models(p, p.manifest)

    plugin_service.uninstall_plugin(p.id, purge=False)
    assert 'ext_testext_thing' in inspect(db.engine).get_table_names()