from __future__ import annotations

from uuid import UUID

from geoalchemy2.shape import to_shape

from app.core.errors import AppError
from app.models import AoiOperation, AoiOperationPartition
from app.schemas.grb import GrbAcquireRequest
from app.schemas.dhmv import DhmvAcquireRequest
from app.schemas.spw_terrain import SpwTerrainAcquireRequest
from app.schemas.official_vector import OfficialVectorAcquireRequest
from app.schemas.flood_hazard import FloodHazardAcquireRequest
from app.schemas.thematic_raster import ThematicRasterAcquireRequest
from app.schemas.bathymetry import BathymetryProfileAcquireRequest, MdkBathymetryAcquireRequest
from app.schemas.job import JobCreate
from app.schemas.operations import VectorSelectionBBox
from app.schemas.orthophoto import OrthophotoAcquireRequest
from app.services.aoi_operation_service import AoiOperationService
from app.services.grb_acquisition_service import GrbAcquisitionService
from app.services.dhmv_acquisition_service import DhmvAcquisitionService
from app.services.spw_terrain_service import SpwTerrainService
from app.services.official_vector_acquisition_service import OfficialVectorAcquisitionService
from app.services.flood_hazard_acquisition_service import FloodHazardAcquisitionService
from app.services.thematic_raster_acquisition_service import ThematicRasterAcquisitionService
from app.services.walous_land_cover_service import WalousLandCoverService
from app.services.bathymetry_profile_acquisition_service import BathymetryProfileAcquisitionService
from app.services.mdk_bathymetry_acquisition_service import MdkBathymetryAcquisitionService
from app.services.job_service import JobService
from app.services.orthophoto_acquisition_service import OrthophotoAcquisitionService


class AoiOperationExecutor:
    """Execute one bounded partition through an existing governed provider."""

    @staticmethod
    def execute_next(db, project_id: UUID, operation_id: UUID) -> dict:
        partition = AoiOperationService.claim_next(db, project_id, operation_id)
        if partition is None:
            AoiOperationService._refresh_parent(db, operation_id)
            return AoiOperationService.read(db, project_id, operation_id)
        operation = db.get(AoiOperation, operation_id)
        child = JobService.create_job(db, JobCreate(
            job_type=f"aoi.{operation.operation_type}.partition",
            project_id=project_id,
            parameters_json={
                "aoi_operation_id": str(operation_id),
                "partition_id": str(partition.id),
                "partition_key": partition.partition_key,
                "provider_key": partition.provider_key,
                "product_key": partition.product_key,
            },
        ))
        partition = db.get(AoiOperationPartition, partition.id)
        partition.child_job_id = child.id
        db.add(partition); db.commit()
        JobService.mark_running(db, child.id)
        try:
            result = AoiOperationExecutor._dispatch(db, project_id, operation, partition)
            output_id = result.get("output_dataset_id") if isinstance(result, dict) else None
            JobService.mark_success(db, child.id, result=result, output_dataset_id=UUID(str(output_id)) if output_id else None)
            return AoiOperationService.complete(db, project_id, operation_id, partition.id, result)
        except AppError as exc:
            JobService.mark_failed(db, child.id, exc.message, {"code": exc.code, "details": exc.details})
            return AoiOperationService.fail(db, project_id, operation_id, partition.id, exc.message, AoiOperationExecutor._retryable(exc), {"code": exc.code, "details": exc.details})
        except Exception:
            try:
                db.rollback()
                JobService.mark_failed(db, child.id, "Unexpected partition execution error", {"code": "AOI_PARTITION_INTERNAL_ERROR"})
            finally:
                AoiOperationService.fail(db, project_id, operation_id, partition.id, "Unexpected partition execution error", True, {"code": "AOI_PARTITION_INTERNAL_ERROR"})
            raise

    @staticmethod
    def _dispatch(db, project_id: UUID, operation: AoiOperation, partition: AoiOperationPartition) -> dict:
        geometry = to_shape(partition.geometry)
        min_x, min_y, max_x, max_y = geometry.bounds
        bbox = VectorSelectionBBox(min_x=min_x, min_y=min_y, max_x=max_x, max_y=max_y, crs="EPSG:4326")
        force_refresh = bool((operation.request_json or {}).get("parameters_json", {}).get("force_refresh", False))
        if partition.provider_key == "grb":
            return GrbAcquisitionService.acquire(db, project_id, GrbAcquireRequest(bbox=bbox, area_id=operation.area_id, product_key=partition.product_key, force_refresh=force_refresh))
        if partition.provider_key == "orthophoto":
            return OrthophotoAcquisitionService.acquire(db, project_id, OrthophotoAcquireRequest(bbox=bbox, area_id=operation.area_id, product_key=partition.product_key, force_refresh=force_refresh))
        if partition.provider_key == "dhmv":
            return DhmvAcquisitionService.acquire(db, project_id, DhmvAcquireRequest(bbox=bbox, area_id=operation.area_id, product_key=partition.product_key, force_refresh=force_refresh))
        if partition.provider_key == "spw_terrain":
            return SpwTerrainService.acquire(db, project_id, SpwTerrainAcquireRequest(bbox=bbox, area_id=operation.area_id, product_key=partition.product_key, force_refresh=force_refresh))
        if partition.provider_key == "official_vector":
            return OfficialVectorAcquisitionService.acquire(db, project_id, OfficialVectorAcquireRequest(bbox=bbox, area_id=operation.area_id, product_key=partition.product_key, force_refresh=force_refresh))
        if partition.provider_key == "flood_hazard":
            return FloodHazardAcquisitionService.acquire(db, project_id, FloodHazardAcquireRequest(bbox=bbox, area_id=operation.area_id, product_key=partition.product_key, force_refresh=force_refresh))
        if partition.provider_key == "thematic_raster":
            return ThematicRasterAcquisitionService.acquire(db, project_id, ThematicRasterAcquireRequest(bbox=bbox, area_id=operation.area_id, product_key=partition.product_key, force_refresh=force_refresh))
        if partition.provider_key == "walous":
            return WalousLandCoverService.acquire(db, project_id, ThematicRasterAcquireRequest(bbox=bbox, area_id=operation.area_id, product_key=partition.product_key, force_refresh=force_refresh))
        if partition.provider_key == "bathymetry_profiles":
            return BathymetryProfileAcquisitionService.acquire(db, project_id, BathymetryProfileAcquireRequest(bbox=bbox, area_id=operation.area_id, force_refresh=force_refresh))
        if partition.provider_key == "mdk_bathymetry":
            return MdkBathymetryAcquisitionService.acquire(db, project_id, MdkBathymetryAcquireRequest(bbox=bbox, area_id=operation.area_id, force_refresh=force_refresh))
        raise AppError(code="AOI_PROVIDER_UNSUPPORTED", message="No governed AOI executor is registered for this provider", details={"provider_key": partition.provider_key}, status_code=422)

    @staticmethod
    def _retryable(error: AppError) -> bool:
        return error.status_code >= 500 or error.code.endswith(("TIMEOUT", "UNAVAILABLE", "TLS_ERROR"))