"""Tests for MiniAppRegistry singleton pattern and plugin lifecycle integration."""

from __future__ import annotations

import pytest

from app.plugins.builtins.kommunikation.miniapp_registry import (
    MiniAppRegistry,
    get_miniapp_registry,
    reset_miniapp_registry,
)


@pytest.fixture(autouse=True)
def _reset_registry():
    """Ensure a clean singleton before and after each test."""
    reset_miniapp_registry()
    yield
    reset_miniapp_registry()


class TestSingletonPattern:
    def test_get_miniapp_registry_returns_same_instance(self):
        """get_miniapp_registry() must return the same object every call."""
        r1 = get_miniapp_registry()
        r2 = get_miniapp_registry()
        assert r1 is r2
        assert isinstance(r1, MiniAppRegistry)

    def test_reset_miniapp_registry_creates_new_instance(self):
        """After reset, a new instance is created."""
        r1 = get_miniapp_registry()
        reset_miniapp_registry()
        r2 = get_miniapp_registry()
        assert r1 is not r2

    def test_reset_miniapp_registry_sets_none(self):
        """reset_miniapp_registry() should set the global to None."""
        get_miniapp_registry()  # ensure singleton exists
        reset_miniapp_registry()
        # Access the module-level global directly
        import app.plugins.builtins.kommunikation.miniapp_registry as mod
        assert mod._registry is None


class TestRegisterAndList:
    def test_register_and_list_apps(self):
        """register() adds an app that appears in list_apps()."""
        registry = get_miniapp_registry()
        registry.register(
            app_id="test_app",
            name="Test App",
            icon="🧪",
            description="A test app",
            plugin_name="test_plugin",
            render_schema={"type": "object"},
        )
        apps = registry.list_apps()
        assert len(apps) == 1
        assert apps[0]["app_id"] == "test_app"
        assert apps[0]["name"] == "Test App"
        assert apps[0]["plugin_name"] == "test_plugin"

    def test_register_overwrites_same_app_id(self):
        """Registering the same app_id replaces the previous entry."""
        registry = get_miniapp_registry()
        registry.register(
            app_id="dup_app",
            name="First",
            icon="1",
            description="",
            plugin_name="plugin_a",
        )
        registry.register(
            app_id="dup_app",
            name="Second",
            icon="2",
            description="",
            plugin_name="plugin_b",
        )
        apps = registry.list_apps()
        assert len(apps) == 1
        assert apps[0]["name"] == "Second"

    def test_list_apps_empty_by_default(self):
        """Fresh registry has no apps."""
        registry = get_miniapp_registry()
        assert registry.list_apps() == []


class TestUnregisterPlugin:
    def test_unregister_plugin_removes_all_apps(self):
        """unregister_plugin() removes all apps from that plugin."""
        registry = get_miniapp_registry()
        registry.register("a1", "A1", "x", "", "plugin_x")
        registry.register("a2", "A2", "x", "", "plugin_x")
        registry.register("b1", "B1", "x", "", "plugin_y")

        registry.unregister_plugin("plugin_x")

        apps = registry.list_apps()
        assert len(apps) == 1
        assert apps[0]["app_id"] == "b1"

    def test_unregister_plugin_noop_for_unknown(self):
        """unregister_plugin() for a non-existent plugin is a no-op."""
        registry = get_miniapp_registry()
        registry.register("a1", "A1", "x", "", "plugin_x")
        registry.unregister_plugin("nonexistent")
        assert len(registry.list_apps()) == 1

    def test_unregister_single_app(self):
        """unregister() removes a specific app by id."""
        registry = get_miniapp_registry()
        registry.register("a1", "A1", "x", "", "plugin_x")
        registry.register("a2", "A2", "x", "", "plugin_x")

        registry.unregister("a1")
        apps = registry.list_apps()
        assert len(apps) == 1
        assert apps[0]["app_id"] == "a2"


class TestPluginLifecycleIntegration:
    """Test that plugin activation/deactivation uses the shared singleton."""

    def test_activation_registers_in_shared_registry(self):
        """When a plugin registers miniapps, they appear in the shared registry."""
        registry = get_miniapp_registry()
        # Simulate what automation/plugin.py on_activate does
        registry.register(
            app_id="automation_agent",
            name="Agent Runner",
            icon="🤖",
            description="Run an AI agent",
            plugin_name="automation",
            render_schema={"type": "object"},
        )

        # A different caller (e.g. a route) should see the same apps
        shared = get_miniapp_registry()
        assert shared is registry
        apps = shared.list_apps()
        assert any(a["app_id"] == "automation_agent" for a in apps)

    def test_deactivation_removes_from_shared_registry(self):
        """When a plugin deactivates, its miniapps are removed from the shared registry."""
        registry = get_miniapp_registry()
        registry.register(
            app_id="automation_agent",
            name="Agent Runner",
            icon="🤖",
            description="Run an AI agent",
            plugin_name="automation",
        )
        registry.register(
            app_id="komm_contact",
            name="Contact Picker",
            icon="👤",
            description="Pick a contact",
            plugin_name="kommunikation",
        )

        # Simulate on_deactivate for automation
        registry.unregister_plugin("automation")

        apps = registry.list_apps()
        assert len(apps) == 1
        assert apps[0]["plugin_name"] == "kommunikation"

    def test_cross_plugin_visibility(self):
        """Apps registered by plugin A are visible to plugin B via the singleton."""
        # Plugin A registers
        registry_a = get_miniapp_registry()
        registry_a.register(
            app_id="plugin_a_app",
            name="A App",
            icon="x",
            description="",
            plugin_name="plugin_a",
        )

        # Plugin B queries
        registry_b = get_miniapp_registry()
        assert registry_a is registry_b
        apps = registry_b.list_apps()
        assert any(a["app_id"] == "plugin_a_app" for a in apps)