from __future__ import annotations

from pathlib import Path

from govoplan_core.core.access import (
    CAPABILITY_AUTH_PERMISSION_EVALUATOR,
    CAPABILITY_AUTH_PRINCIPAL_RESOLVER,
)
from govoplan_core.core.module_guards import (
    drop_table_retirement_provider,
    persistent_table_uninstall_guard,
)
from govoplan_core.core.modules import (
    DocumentationLink,
    DocumentationTopic,
    FrontendModule,
    FrontendRoute,
    MigrationSpec,
    ModuleContext,
    ModuleInterfaceProvider,
    ModuleManifest,
    PermissionDefinition,
    RoleTemplate,
)
from govoplan_core.core.provider_governance import declared_module_architecture
from govoplan_core.core.search import (
    CAPABILITY_SEARCH_INDEX_WRITER,
    SearchProviderRegistration,
)
from govoplan_core.core.views import ViewSurface
from govoplan_core.db.base import Base
from govoplan_search.backend.db import models as search_models


MODULE_ID = "search"
MODULE_NAME = "Search"
MODULE_VERSION = "0.1.14"
READ_SCOPE = "search:result:read"
INDEX_SCOPE = "search:index:write"
ADMIN_SCOPE = "search:index:admin"


def _permission(scope: str, label: str, description: str) -> PermissionDefinition:
    module_id, resource, action = scope.split(":", 2)
    return PermissionDefinition(
        scope=scope,
        label=label,
        description=description,
        category="Search",
        level="tenant",
        module_id=module_id,
        resource=resource,
        action=action,
    )


PERMISSIONS = (
    _permission(
        READ_SCOPE,
        "Search available content",
        "Search content the current principal is authorized to read.",
    ),
    _permission(
        INDEX_SCOPE,
        "Write search index entries",
        "Publish and remove module-owned entries in the search index.",
    ),
    _permission(
        ADMIN_SCOPE,
        "Administer search index",
        "Inspect providers and rebuild tenant search indexes.",
    ),
)

ROLE_TEMPLATES = (
    RoleTemplate(
        slug="search_user",
        name="Search user",
        description="Search content available to the current account.",
        permissions=(READ_SCOPE,),
        default_authenticated=True,
    ),
    RoleTemplate(
        slug="search_manager",
        name="Search manager",
        description="Search content and administer indexing.",
        permissions=(READ_SCOPE, INDEX_SCOPE, ADMIN_SCOPE),
    ),
)


def _service(context: ModuleContext):
    from govoplan_search.backend.service import SearchIndexService

    return SearchIndexService(context.registry)


def _router(_context: ModuleContext):
    from govoplan_search.backend.router import router

    return router


manifest = ModuleManifest(
    id=MODULE_ID,
    name=MODULE_NAME,
    version=MODULE_VERSION,
    optional_dependencies=(
        "access",
        "views",
        "connectors",
        "wiki",
        "projects",
        "tickets",
        "cases",
    ),
    required_capabilities=(
        CAPABILITY_AUTH_PRINCIPAL_RESOLVER,
        CAPABILITY_AUTH_PERMISSION_EVALUATOR,
    ),
    provides_interfaces=(
        ModuleInterfaceProvider(name="search.provider", version="1.0.0"),
        ModuleInterfaceProvider(name="search.index_writer", version="1.1.0"),
        ModuleInterfaceProvider(name="search.source", version="1.0.0"),
    ),
    permissions=PERMISSIONS,
    role_templates=ROLE_TEMPLATES,
    route_factory=_router,
    frontend=FrontendModule(
        module_id=MODULE_ID,
        package_name="@govoplan/search-webui",
        routes=(
            FrontendRoute(
                path="/search",
                component="SearchPage",
                required_any=(READ_SCOPE,),
                order=12,
            ),
        ),
        view_surfaces=(
            ViewSurface(
                id="search.global",
                module_id=MODULE_ID,
                kind="selector",
                label="Global search",
                description="Search entry in the title bar.",
                order=10,
            ),
            ViewSurface(
                id="search.results",
                module_id=MODULE_ID,
                kind="route",
                label="Search results",
                order=20,
            ),
            ViewSurface(
                id="search.admin.index",
                module_id=MODULE_ID,
                kind="section",
                label="Search index administration",
                order=30,
            ),
        ),
    ),
    migration_spec=MigrationSpec(
        module_id=MODULE_ID,
        metadata=Base.metadata,
        script_location=str(Path(__file__).with_name("migrations") / "versions"),
        retirement_supported=True,
        retirement_provider=drop_table_retirement_provider(
            search_models.SearchIndexChangeQueue,
            search_models.SearchIndexAclToken,
            search_models.SearchIndexDocument,
            search_models.SearchIndexState,
            label="Search",
        ),
        retirement_notes=(
            "Destructive retirement removes the derived search index. "
            "Source module data remains authoritative."
        ),
    ),
    uninstall_guard_providers=(
        persistent_table_uninstall_guard(
            search_models.SearchIndexChangeQueue,
            search_models.SearchIndexDocument,
            search_models.SearchIndexState,
            label="Search index",
        ),
    ),
    capability_factories={
        CAPABILITY_SEARCH_INDEX_WRITER: _service,
    },
    search_providers=(
        SearchProviderRegistration(
            id="search.index",
            factory=_service,
            order=10,
        ),
    ),
    documentation=(
        DocumentationTopic(
            id="search.global-and-contextual",
            title="Global and contextual search",
            summary=(
                "Search authorized native and connected objects from one "
                "permission-aware interface."
            ),
            body=(
                "Search works with the built-in database index and can aggregate "
                "optional providers. Source modules announce searchable types, "
                "context scopes, and ACL-aware index entries. External engines "
                "remain optional adapters. F3 or the title-bar field opens the "
                "keyboard-navigable search overlay; filters never broaden the "
                "current principal's source permissions. Provider failures are "
                "shown as partial diagnostics without discarding safe results."
                " Search administrators can inspect native source coverage, "
                "process queued changes, reconcile enabled modules, and run "
                "bounded source rebuilds from Administration. Quarantined "
                "changes remain visible until repaired and reconciled."
            ),
            layer="available",
            documentation_types=("admin", "user"),
            audience=("administrator", "user"),
            related_modules=("connectors", "views"),
            links=(
                DocumentationLink(
                    label="Search interface pattern audit",
                    href="govoplan-search/docs/INTERFACE_PATTERN_MIGRATION.md",
                    kind="repository",
                ),
            ),
            order=12,
        ),
    ),
    architecture=declared_module_architecture(
        layer="governance_accountability",
        kind="runtime",
        maturity="vertical_slice",
        documentation_ref="README.md",
        test_ref="tests/test_postgres_search.py",
        known_limits=("The built-in PostgreSQL index is implemented; optional OpenSearch target evidence is not.",),
        supported_authority_modes=("external_mirror",),
        owned_concepts=("derived search index", "search ACL projection", "index change queue"),
        non_owned_concepts=("source object", "source authorization", "external search engine"),
        recovery_docs=("README.md",),
        security_docs=("README.md",),
        operations_docs=("README.md",),
    ),
)


def get_manifest() -> ModuleManifest:
    return manifest


__all__ = [
    "ADMIN_SCOPE",
    "INDEX_SCOPE",
    "MODULE_ID",
    "MODULE_VERSION",
    "READ_SCOPE",
    "get_manifest",
    "manifest",
]