"""Operator API for Deployment Control Plane V1.

All mutations accept a typed plan and an idempotency key.  There is no endpoint
for command execution, Compose upload, arbitrary host paths or raw secrets.
"""

from __future__ import annotations

from typing import Annotated, Literal

from fastapi import APIRouter, Depends, Header, HTTPException, Query, Request
from pydantic import BaseModel, ConfigDict, Field
from sqlmodel import Session

from ..core.security import require_operator_request
from ..db.session import get_session
from ..schemas.deployment import DeploymentPlanV1
from ..schemas.forge_bootstrap import ForgeBootstrapPreflightV1
from ..schemas.forge_bootstrap_apply import ForgeBootstrapApplyV1
from ..schemas.forge_secret_delivery import (
    ForgeSecretDeliveryRequestV1,
    ForgeSecretDeliveryResultV1,
)
from ..schemas.forge_runtime_readiness import ForgeRuntimeReadinessResultV1
from ..services.deployment_broker import DeploymentBrokerClient
from ..services.deployment_control_plane import (
    DeploymentControlError,
    DeploymentControlPlane,
)


def _require_deployment_operator(request: Request) -> str:
    return require_operator_request(request)


router = APIRouter(
    prefix="/api/deployments",
    tags=["deployments"],
    dependencies=[Depends(_require_deployment_operator)],
)


class DeploymentRequestV1(BaseModel):
    model_config = ConfigDict(extra="forbid")

    plan: DeploymentPlanV1
    operation: Literal["preflight", "apply", "rollback"] = "preflight"


class WorkMeshPromotionPreflightRequest(BaseModel):
    model_config = ConfigDict(extra="forbid")

    revision: str = Field(pattern=r"^[0-9a-f]{40}$")


DeploymentSession = Annotated[Session, Depends(get_session)]
DeploymentIdempotencyKey = Annotated[str | None, Header(alias="Idempotency-Key")]
DeploymentLimit = Annotated[int, Query(ge=1, le=250)]


def _idempotency_header(value: str | None) -> str:
    if not value:
        raise HTTPException(status_code=400, detail="Idempotency-Key is required for deployment operations.")
    return value.strip()


@router.post("")
def request_deployment(
    payload: DeploymentRequestV1,
    session: DeploymentSession,
    idempotency_key: DeploymentIdempotencyKey = None,
):
    try:
        return DeploymentControlPlane().execute(
            session,
            plan=payload.plan,
            idempotency_key=_idempotency_header(idempotency_key),
            operation=payload.operation,
        )
    except DeploymentControlError as exc:
        raise HTTPException(status_code=409, detail=str(exc)) from exc


@router.post("/workmesh/promotions/preflight")
def preflight_workmesh_promotion(
    payload: WorkMeshPromotionPreflightRequest,
    session: DeploymentSession,
    idempotency_key: DeploymentIdempotencyKey = None,
):
    from ..services.workmesh_promotion import (
        WorkMeshPromotionError,
        WorkMeshPromotionService,
    )

    try:
        return WorkMeshPromotionService().preflight(
            session,
            revision=payload.revision,
            idempotency_key=_idempotency_header(idempotency_key),
        )
    except WorkMeshPromotionError as exc:
        raise HTTPException(status_code=409, detail=str(exc)) from exc


@router.post("/forge-bootstrap/preflight")
def preflight_forge_bootstrap(
    payload: ForgeBootstrapPreflightV1,
    session: DeploymentSession,
    idempotency_key: DeploymentIdempotencyKey = None,
):
    from ..services.forge_bootstrap_preflight import (
        ForgeBootstrapPreflightError,
        ForgeBootstrapPreflightService,
    )

    try:
        return ForgeBootstrapPreflightService().preflight(
            session,
            payload,
            idempotency_key=_idempotency_header(idempotency_key),
        )
    except ForgeBootstrapPreflightError as exc:
        raise HTTPException(status_code=409, detail=str(exc)) from exc


@router.post(
    "/forge-bootstrap/secrets",
    response_model=ForgeSecretDeliveryResultV1,
)
def prepare_forge_bootstrap_secrets(
    payload: ForgeSecretDeliveryRequestV1,
    actor_identity: Annotated[str, Depends(_require_deployment_operator)],
    session: DeploymentSession,
    idempotency_key: DeploymentIdempotencyKey = None,
):
    """Deliver only the verified protected Forge inputs to the fixed controller."""
    from ..services.forge_secret_delivery import prepare_forge_secret_delivery

    try:
        return prepare_forge_secret_delivery(
            session,
            profile=payload.profile,
            idempotency_key=_idempotency_header(idempotency_key),
            actor_identity=actor_identity,
        )
    except ValueError as exc:
        # Service messages are fixed safe codes; never surface upstream text.
        raise HTTPException(status_code=409, detail="forge_secret_delivery_failed") from exc


@router.post("/forge-bootstrap/first-install")
def apply_forge_first_install(
    payload: ForgeBootstrapApplyV1,
    session: DeploymentSession,
    idempotency_key: DeploymentIdempotencyKey = None,
):
    from ..services.forge_bootstrap_apply import (
        ForgeBootstrapApplyError,
        ForgeBootstrapApplyService,
    )

    try:
        return ForgeBootstrapApplyService().apply(
            session,
            payload,
            idempotency_key=_idempotency_header(idempotency_key),
        )
    except ForgeBootstrapApplyError as exc:
        raise HTTPException(status_code=409, detail=str(exc)) from exc


@router.post("/forge-bootstrap/first-install/{job_id}/resume")
def resume_forge_first_install(job_id: str, session: DeploymentSession):
    from ..services.forge_bootstrap_apply import ForgeBootstrapApplyService

    result = ForgeBootstrapApplyService().resume(session, job_id)
    if result is None:
        raise HTTPException(status_code=404, detail="Forge first-install request not found.")
    return result


@router.get("/workmesh/promotions/{promotion_id}")
def get_workmesh_promotion(promotion_id: str, session: DeploymentSession):
    from ..services.workmesh_promotion import WorkMeshPromotionService

    result = WorkMeshPromotionService().refresh(session, promotion_id)
    if result is None:
        raise HTTPException(status_code=404, detail="WorkMesh promotion not found.")
    return result


@router.get("/workmesh/promotions")
def list_workmesh_promotions(
    session: DeploymentSession,
    limit: DeploymentLimit = 20,
):
    from ..services.workmesh_promotion import WorkMeshPromotionService

    return {"items": WorkMeshPromotionService.list_promotions(session, limit=limit)}


@router.get("/forge-bootstrap/first-install/{job_id}")
def get_forge_first_install(job_id: str, session: DeploymentSession):
    from ..services.forge_bootstrap_apply import ForgeBootstrapApplyService

    result = ForgeBootstrapApplyService().status(session, job_id)
    if result is None:
        raise HTTPException(status_code=404, detail="Forge first-install request not found.")
    return result


@router.get(
    "/forge-bootstrap/first-install/{job_id}/readiness",
    response_model=ForgeRuntimeReadinessResultV1,
)
def get_forge_first_install_readiness(
    job_id: str,
    request: Request,
    session: DeploymentSession,
):
    """Return only a fresh, fixed controller observation for a known install."""
    content_lengths = request.headers.getlist("content-length")
    if (
        request.query_params
        or len(content_lengths) > 1
        or (content_lengths and content_lengths[0] != "0")
        or request.headers.getlist("transfer-encoding")
    ):
        raise HTTPException(status_code=400, detail="invalid_readiness_request")
    from ..services.forge_bootstrap_apply import ForgeBootstrapApplyService

    return ForgeBootstrapApplyService().current_readiness(session, job_id)


@router.get("")
def list_deployments(session: DeploymentSession, limit: DeploymentLimit = 100):
    return {"items": DeploymentControlPlane().list_jobs(session, limit=limit)}


@router.get("/delivery-status")
def get_delivery_status():
    """Expose the controller's bounded, secret-free runnerless delivery view."""
    return DeploymentBrokerClient().delivery_status()


@router.get("/{job_id}")
def get_deployment(job_id: str, session: DeploymentSession):
    if job_id.startswith("forge-install-"):
        raise HTTPException(
            status_code=404,
            detail="Use the fixed Forge first-install status route for this job.",
        )
    try:
        return DeploymentControlPlane().refresh(session, job_id)
    except DeploymentControlError as exc:
        raise HTTPException(status_code=404, detail=str(exc)) from exc