"""M4 — System-Rückbau tests.

Core-owned MiniApps (audit_activity, system_metrics) registered by the
host; contacts_stats as a native manifest miniapp with component (fixes
the base.py gap where native miniapps did not carry their frontend
component); the dashboard seed only places renderable apps (component
present) — chat interaction apps without a component stay off dashboard
layouts.
"""

from __future__ import annotations

import pytest
from httpx import AsyncClient

from tests.conftest import ORIGIN_HEADER, login_client, seed_tenant_and_users


@pytest.fixture(autouse=True)
def _registry_with_system_apps():
    """Fresh registry per test WITH the core system miniapps registered."""
    from app.plugins.miniapp_registry import (
        reset_miniapp_registry,
    )

    reset_miniapp_registry()
    from app.core.system_miniapps import register_system_miniapps

    register_system_miniapps()
    yield
    reset_miniapp_registry()


# ═══════════════════════════════════════════════════════════════
# Unit: system miniapp definitions
# ═══════════════════════════════════════════════════════════════


class TestSystemMiniAppDefs:
    def test_audit_activity_definition(self):
        from app.plugins.miniapp_registry import get_miniapp_registry

        app = get_miniapp_registry().get_app("audit_activity")
        assert app is not None, "audit_activity must be registered"
        assert app.plugin_name == "system"
        assert app.permission == "audit:read"
        assert app.component == "@/components/dashboard/AuditActivityWidget"
        assert "dashboard" in app.hosts
        # settings_schema drives the generic settings form (max_items)
        fields = app.settings_schema.get("fields", [])
        assert any(f["name"] == "max_items" for f in fields)

    def test_system_metrics_definition(self):
        from app.plugins.miniapp_registry import get_miniapp_registry

        app = get_miniapp_registry().get_app("system_metrics")
        assert app is not None, "system_metrics must be registered"
        assert app.plugin_name == "system"
        assert app.permission == "settings:read"
        assert app.component == "@/components/dashboard/SystemMetricsWidget"
        assert app.col_span >= 2

    def test_native_manifest_miniapp_carries_component(self):
        """contacts_stats lives in the native miniapps manifest section and
        carries its frontend component (base.py must pass it through)."""
        from app.plugins.builtins.contacts.plugin import ContactsPlugin

        contributions = ContactsPlugin().manifest.miniapps
        stats = [m for m in contributions if m.app_id == "contacts_stats"]
        assert len(stats) == 1
        assert stats[0].component == "@/components/dashboard/ContactsStatsWidget"
        assert stats[0].permission == "contacts:read"

    def test_base_plugin_registers_native_miniapp_with_component(self):
        """The lifecycle path registers native miniapps INCLUDING component
        (M4 fix for the M1 gap where only the dashboard_widgets alias
        passed components through)."""
        from app.plugins.builtins.contacts.plugin import ContactsPlugin
        from app.plugins.miniapp_registry import get_miniapp_registry

        plugin = ContactsPlugin()
        plugin._register_manifest_miniapps()
        app = get_miniapp_registry().get_app("contacts_stats")
        assert app is not None
        assert app.component == "@/components/dashboard/ContactsStatsWidget"
        # dashboard_widgets alias still works
        assert get_miniapp_registry().get_app("recent_contacts") is not None


# ═══════════════════════════════════════════════════════════════
# API: permission-filtered visibility
# ═══════════════════════════════════════════════════════════════


@pytest.mark.asyncio
class TestSystemMiniAppsApi:
    async def test_admin_sees_system_apps(self, client: AsyncClient, db_session):
        await seed_tenant_and_users(db_session)
        await login_client(client, "admin@tenanta.com")
        resp = await client.get("/api/v1/miniapps", headers=ORIGIN_HEADER)
        assert resp.status_code == 200
        app_ids = {i["app_id"] for i in resp.json()["items"]}
        assert "audit_activity" in app_ids
        assert "system_metrics" in app_ids

    async def test_viewer_does_not_see_system_apps(
        self, client: AsyncClient, db_session
    ):
        """Viewer has neither audit:read nor settings:read -> fail-closed."""
        await seed_tenant_and_users(db_session)
        await login_client(client, "viewer@tenanta.com")
        resp = await client.get("/api/v1/miniapps", headers=ORIGIN_HEADER)
        assert resp.status_code == 200
        app_ids = {i["app_id"] for i in resp.json()["items"]}
        assert "audit_activity" not in app_ids
        assert "system_metrics" not in app_ids


# ═══════════════════════════════════════════════════════════════
# Seed: only renderable apps (component) go onto dashboard layouts
# ═══════════════════════════════════════════════════════════════


@pytest.mark.asyncio
class TestSeedComponentFilter:
    async def test_seed_excludes_apps_without_component(
        self, client: AsyncClient, db_session
    ):
        """Chat interaction apps without a frontend component must not be
        seeded onto dashboard layouts (production measurement 2026-08-30:
        9 seeded widgets, only 3 renderable)."""
        await seed_tenant_and_users(db_session)
        await login_client(client, "admin@tenanta.com")

        from app.plugins.miniapp_registry import get_miniapp_registry

        reg = get_miniapp_registry()
        reg.register(
            app_id="renderable_app", name="Renderable", plugin_name="test",
            permission="", component="@/components/x", order=90,
        )
        reg.register(
            app_id="chat_only_app", name="Chat Only", plugin_name="test",
            permission="", component="", order=95,
        )

        resp = await client.get("/api/v1/dashboards", headers=ORIGIN_HEADER)
        assert resp.status_code == 200
        items = resp.json()
        assert len(items) == 1
        seeded_ids = {
            w["app_id"]
            for w in items[0]["layout"]["tabs"][0]["widgets"]
        }
        assert "renderable_app" in seeded_ids
        assert "chat_only_app" not in seeded_ids
        # system apps are renderable and (for the admin) permitted -> seeded
        assert "audit_activity" in seeded_ids
        assert "system_metrics" in seeded_ids