from typing import Any

from fastapi import APIRouter, Depends, Header, Path, Query, Response
from pydantic import BaseModel

from app.api.dependencies.auth import build_request_context
from app.api.schemas.admin import (
    EmptyPayload,
    EndpointPayload,
    IntentPayload,
    ItemPayload,
    NegativePayload,
    PromptPayload,
    ReleasePayload,
    ReplyPayload,
    ReviewPayload,
    RoutingPayload,
)
from app.core.contracts import RequestContext
from app.service.admin_service import AdminService

router = APIRouter(prefix="/api/v1/admin", tags=["platform-admin"])


def register_resource(
    resource: str, schema: type[BaseModel], id_name: str, *, scoped: bool = False,
    update: bool = True, detail: bool = True,
) -> None:
    prefix = f"/config-releases/{{release_id}}/{resource}" if scoped else f"/{resource}"

    async def create(
        payload: BaseModel, response: Response, release_id: int | None = None,
        context: RequestContext = Depends(build_request_context),  # noqa: B008
        key: str | None = Header(default=None, alias="Idempotency-Key"),
    ) -> dict[str, Any]:
        result = await AdminService().mutate(resource, context, payload.model_dump(mode="json"),
                                             key, None, release_id=release_id)
        response.headers["ETag"] = f'"{result["meta"]["etag"]}"'
        return result

    create.__annotations__["payload"] = schema
    router.add_api_route(prefix, create, methods=["POST"], status_code=201,
                         operation_id=f"create_{resource}")

    async def list_rows(
        release_id: int | None = None, limit: int = Query(default=20, ge=1, le=100),
        context: RequestContext = Depends(build_request_context),  # noqa: B008
    ) -> dict[str, Any]:
        return await AdminService().query(resource, context, release_id=release_id, limit=limit)

    router.add_api_route(prefix, list_rows, methods=["GET"], operation_id=f"list_{resource}")

    async def get(
        response: Response, row_id: int = Path(alias=id_name, gt=0),
        context: RequestContext = Depends(build_request_context),  # noqa: B008
    ) -> dict[str, Any]:
        result = await AdminService().query(resource, context, row_id=row_id)
        response.headers["ETag"] = f'"{result["meta"]["etag"]}"'
        return result

    if detail:
        router.add_api_route(f"{prefix}/{{{id_name}}}", get, methods=["GET"],
                             operation_id=f"get_{resource}")

    async def put(
        payload: BaseModel, response: Response, row_id: int = Path(alias=id_name, gt=0),
        release_id: int | None = None,
        context: RequestContext = Depends(build_request_context),  # noqa: B008
        key: str | None = Header(default=None, alias="Idempotency-Key"),
        if_match: str | None = Header(default=None, alias="If-Match"),
    ) -> dict[str, Any]:
        result = await AdminService().mutate(resource, context, payload.model_dump(mode="json"),
                                             key, if_match, row_id=row_id, release_id=release_id)
        response.headers["ETag"] = f'"{result["meta"]["etag"]}"'
        return result

    put.__annotations__["payload"] = schema
    if update:
        router.add_api_route(f"{prefix}/{{{id_name}}}", put, methods=["PUT"],
                             operation_id=f"update_{resource}")


def register_transition(resource: str, id_name: str, action: str) -> None:
    async def transition(
        payload: BaseModel, response: Response, row_id: int = Path(alias=id_name, gt=0),
        context: RequestContext = Depends(build_request_context),  # noqa: B008
        key: str | None = Header(default=None, alias="Idempotency-Key"),
        if_match: str | None = Header(default=None, alias="If-Match"),
    ) -> dict[str, Any]:
        result = await AdminService().mutate(resource, context, payload.model_dump(mode="json"),
                                             key, if_match, row_id=row_id, action=action)
        response.headers["ETag"] = f'"{result["meta"]["etag"]}"'
        return result

    transition.__annotations__["payload"] = ReviewPayload if action == "reviews" else EmptyPayload
    router.add_api_route(f"/{resource}/{{{id_name}}}/{action}", transition, methods=["POST"],
                         status_code=201 if action == "rollbacks" else 200,
                         operation_id=f"{action}_{resource}")


register_resource("config-releases", ReleasePayload, "release_id", update=False)
register_resource("platform-config-items", ItemPayload, "item_id", scoped=True, detail=False)
register_resource("model-endpoints", EndpointPayload, "endpoint_id")
register_resource("model-routing-rules", RoutingPayload, "rule_id", scoped=True, detail=False)
register_resource("prompt-templates", PromptPayload, "prompt_id", update=False)
register_resource("agent-intent-configs", IntentPayload, "config_id", detail=False)
register_resource("reply-templates", ReplyPayload, "template_id", detail=False)
register_resource("negative-word-rules", NegativePayload, "rule_id", detail=False)
for action in ("validations", "reviews", "activations", "rollbacks"):
    register_transition("config-releases", "release_id", action)
for action in ("reviews", "activations", "disablements"):
    register_transition("model-endpoints", "endpoint_id", action)


@router.get("/audit-records")
async def audit_records(
    limit: int = Query(default=20, ge=1, le=100),
    context: RequestContext = Depends(build_request_context),  # noqa: B008
) -> dict[str, Any]:
    return await AdminService().query("audit-records", context, limit=limit)