from fastapi import APIRouter, Depends, Query

from app.core.config import settings
from app.repositories.audit import create_audit_event
from app.repositories.scheme_groups import (
    create_scheme_version_group,
    delete_scheme_version_group_by_record_id,
    get_scheme_version_group_by_record_id,
    list_scheme_version_groups,
    update_scheme_version_group_by_record_id,
)
from app.repositories.scheme_seats import (
    bulk_update_scheme_version_seats_by_record_id,
    cascade_update_seat_group_reference,
    cascade_update_seat_sector_reference,
    get_scheme_version_seat_by_record_id,
    list_scheme_version_seats,
    update_scheme_version_seat_by_record_id,
)
from app.repositories.scheme_sectors import (
    create_scheme_version_sector,
    delete_scheme_version_sector_by_record_id,
    get_scheme_version_sector_by_record_id,
    list_scheme_version_sectors,
    update_scheme_version_sector_by_record_id,
)
from app.schemas.editor import (
    BulkSeatPatchRequest,
    BulkSeatPatchResponse,
    BulkSeatPatchResultItem,
    CreateGroupRequest,
    CreateGroupResponse,
    CreateSectorRequest,
    CreateSectorResponse,
    DeleteEntityResponse,
    DraftGroupItem,
    DraftSeatItem,
    DraftSectorItem,
    DraftStructureResponse,
    GroupPatchRequest,
    GroupPatchResponse,
    RepairReferencesResponse,
    SeatPatchRequest,
    SeatPatchResponse,
    SectorPatchRequest,
    SectorPatchResponse,
    StructureDiffEntityItem,
    StructureDiffResponse,
)
from app.security.auth import require_api_key
from app.services.draft_guard import get_current_draft_context
from app.services.editor_validation import (
    validate_bulk_seat_patch_references,
    validate_bulk_seat_patch_uniqueness,
    validate_create_group_uniqueness,
    validate_create_sector_uniqueness,
    validate_group_patch_uniqueness,
    validate_sector_patch_uniqueness,
    validate_single_seat_patch_references,
    validate_single_seat_patch_uniqueness,
)
from app.services.scheme_validation import build_scheme_validation_report
from app.services.structure_diff import build_structure_diff
from app.services.structure_sync import repair_structure_references

router = APIRouter()


@router.get(f"{settings.api_v1_prefix}/schemes/{{scheme_id}}/draft/structure", response_model=DraftStructureResponse)
async def get_draft_structure(
    scheme_id: str,
    expected_scheme_version_id: str | None = Query(default=None),
    role: str = Depends(require_api_key),
):
    scheme, version = await get_current_draft_context(
        scheme_id,
        expected_scheme_version_id=expected_scheme_version_id,
    )
    seats = await list_scheme_version_seats(version.scheme_version_id)
    sectors = await list_scheme_version_sectors(version.scheme_version_id)
    groups = await list_scheme_version_groups(version.scheme_version_id)

    return DraftStructureResponse(
        scheme_id=scheme.scheme_id,
        scheme_version_id=version.scheme_version_id,
        status=version.status,
        seats=[
            DraftSeatItem(
                seat_record_id=row.seat_record_id,
                scheme_id=row.scheme_id,
                scheme_version_id=row.scheme_version_id,
                element_id=row.element_id,
                seat_id=row.seat_id,
                sector_id=row.sector_id,
                group_id=row.group_id,
                row_label=row.row_label,
                seat_number=row.seat_number,
                tag=row.tag,
                classes_raw=row.classes_raw,
                x=row.x,
                y=row.y,
                cx=row.cx,
                cy=row.cy,
                width=row.width,
                height=row.height,
                created_at=row.created_at.isoformat(),
            )
            for row in seats
        ],
        sectors=[
            DraftSectorItem(
                sector_record_id=row.sector_record_id,
                scheme_id=row.scheme_id,
                scheme_version_id=row.scheme_version_id,
                element_id=row.element_id,
                sector_id=row.sector_id,
                name=row.name,
                classes_raw=row.classes_raw,
                created_at=row.created_at.isoformat(),
            )
            for row in sectors
        ],
        groups=[
            DraftGroupItem(
                group_record_id=row.group_record_id,
                scheme_id=row.scheme_id,
                scheme_version_id=row.scheme_version_id,
                element_id=row.element_id,
                group_id=row.group_id,
                name=row.name,
                classes_raw=row.classes_raw,
                created_at=row.created_at.isoformat(),
            )
            for row in groups
        ],
        total_seats=len(seats),
        total_sectors=len(sectors),
        total_groups=len(groups),
    )


@router.get(f"{settings.api_v1_prefix}/schemes/{{scheme_id}}/draft/validation")
async def get_draft_validation(
    scheme_id: str,
    expected_scheme_version_id: str | None = Query(default=None),
    role: str = Depends(require_api_key),
):
    scheme, version = await get_current_draft_context(
        scheme_id,
        expected_scheme_version_id=expected_scheme_version_id,
    )
    report = await build_scheme_validation_report(
        scheme_id=scheme.scheme_id,
        scheme_version_id=version.scheme_version_id,
    )
    return {
        "scheme_id": scheme.scheme_id,
        "scheme_version_id": version.scheme_version_id,
        "status": version.status,
        "report": report,
    }


@router.get(f"{settings.api_v1_prefix}/schemes/{{scheme_id}}/draft/seats/records/{{seat_record_id}}", response_model=DraftSeatItem)
async def get_draft_seat_by_record_id(
    scheme_id: str,
    seat_record_id: str,
    expected_scheme_version_id: str | None = Query(default=None),
    role: str = Depends(require_api_key),
):
    _scheme, version = await get_current_draft_context(
        scheme_id,
        expected_scheme_version_id=expected_scheme_version_id,
    )
    row = await get_scheme_version_seat_by_record_id(
        scheme_version_id=version.scheme_version_id,
        seat_record_id=seat_record_id,
    )
    return DraftSeatItem(
        seat_record_id=row.seat_record_id,
        scheme_id=row.scheme_id,
        scheme_version_id=row.scheme_version_id,
        element_id=row.element_id,
        seat_id=row.seat_id,
        sector_id=row.sector_id,
        group_id=row.group_id,
        row_label=row.row_label,
        seat_number=row.seat_number,
        tag=row.tag,
        classes_raw=row.classes_raw,
        x=row.x,
        y=row.y,
        cx=row.cx,
        cy=row.cy,
        width=row.width,
        height=row.height,
        created_at=row.created_at.isoformat(),
    )


@router.get(f"{settings.api_v1_prefix}/schemes/{{scheme_id}}/draft/sectors/records/{{sector_record_id}}", response_model=DraftSectorItem)
async def get_draft_sector_by_record_id(
    scheme_id: str,
    sector_record_id: str,
    expected_scheme_version_id: str | None = Query(default=None),
    role: str = Depends(require_api_key),
):
    _scheme, version = await get_current_draft_context(
        scheme_id,
        expected_scheme_version_id=expected_scheme_version_id,
    )
    row = await get_scheme_version_sector_by_record_id(
        scheme_version_id=version.scheme_version_id,
        sector_record_id=sector_record_id,
    )
    return DraftSectorItem(
        sector_record_id=row.sector_record_id,
        scheme_id=row.scheme_id,
        scheme_version_id=row.scheme_version_id,
        element_id=row.element_id,
        sector_id=row.sector_id,
        name=row.name,
        classes_raw=row.classes_raw,
        created_at=row.created_at.isoformat(),
    )


@router.get(f"{settings.api_v1_prefix}/schemes/{{scheme_id}}/draft/groups/records/{{group_record_id}}", response_model=DraftGroupItem)
async def get_draft_group_by_record_id(
    scheme_id: str,
    group_record_id: str,
    expected_scheme_version_id: str | None = Query(default=None),
    role: str = Depends(require_api_key),
):
    _scheme, version = await get_current_draft_context(
        scheme_id,
        expected_scheme_version_id=expected_scheme_version_id,
    )
    row = await get_scheme_version_group_by_record_id(
        scheme_version_id=version.scheme_version_id,
        group_record_id=group_record_id,
    )
    return DraftGroupItem(
        group_record_id=row.group_record_id,
        scheme_id=row.scheme_id,
        scheme_version_id=row.scheme_version_id,
        element_id=row.element_id,
        group_id=row.group_id,
        name=row.name,
        classes_raw=row.classes_raw,
        created_at=row.created_at.isoformat(),
    )


@router.get(f"{settings.api_v1_prefix}/schemes/{{scheme_id}}/draft/compare-preview", response_model=StructureDiffResponse)
async def get_draft_compare_preview(
    scheme_id: str,
    expected_scheme_version_id: str | None = Query(default=None),
    role: str = Depends(require_api_key),
):
    scheme, version = await get_current_draft_context(
        scheme_id,
        expected_scheme_version_id=expected_scheme_version_id,
    )
    diff = await build_structure_diff(
        scheme_id=scheme.scheme_id,
        draft_scheme_version_id=version.scheme_version_id,
    )
    return StructureDiffResponse(
        scheme_id=scheme.scheme_id,
        draft_scheme_version_id=version.scheme_version_id,
        baseline_scheme_version_id=diff["baseline_scheme_version_id"],
        summary=diff["summary"],
        sectors=[StructureDiffEntityItem(**item) for item in diff["sectors"]],
        groups=[StructureDiffEntityItem(**item) for item in diff["groups"]],
        seats=[StructureDiffEntityItem(**item) for item in diff["seats"]],
    )


@router.post(f"{settings.api_v1_prefix}/schemes/{{scheme_id}}/draft/sectors", response_model=CreateSectorResponse)
async def create_draft_sector(
    scheme_id: str,
    payload: CreateSectorRequest,
    expected_scheme_version_id: str | None = Query(default=None),
    role: str = Depends(require_api_key),
):
    scheme, version = await get_current_draft_context(
        scheme_id,
        expected_scheme_version_id=expected_scheme_version_id,
    )

    await validate_create_sector_uniqueness(
        scheme_version_id=version.scheme_version_id,
        sector_id=payload.sector_id,
        element_id=payload.element_id,
    )

    row = await create_scheme_version_sector(
        scheme_id=scheme.scheme_id,
        scheme_version_id=version.scheme_version_id,
        element_id=payload.element_id,
        sector_id=payload.sector_id,
        name=payload.name,
        classes_raw=payload.classes_raw,
    )

    await create_audit_event(
        scheme_id=scheme.scheme_id,
        event_type="draft.sector.created",
        object_type="sector",
        object_ref=row.sector_record_id,
        details={
            "scheme_version_id": version.scheme_version_id,
            "sector_id": row.sector_id,
            "name": row.name,
        },
    )

    return CreateSectorResponse(
        scheme_id=scheme.scheme_id,
        scheme_version_id=version.scheme_version_id,
        sector_record_id=row.sector_record_id,
        element_id=row.element_id,
        sector_id=row.sector_id,
        name=row.name,
    )


@router.post(f"{settings.api_v1_prefix}/schemes/{{scheme_id}}/draft/groups", response_model=CreateGroupResponse)
async def create_draft_group(
    scheme_id: str,
    payload: CreateGroupRequest,
    expected_scheme_version_id: str | None = Query(default=None),
    role: str = Depends(require_api_key),
):
    scheme, version = await get_current_draft_context(
        scheme_id,
        expected_scheme_version_id=expected_scheme_version_id,
    )

    await validate_create_group_uniqueness(
        scheme_version_id=version.scheme_version_id,
        group_id=payload.group_id,
        element_id=payload.element_id,
    )

    row = await create_scheme_version_group(
        scheme_id=scheme.scheme_id,
        scheme_version_id=version.scheme_version_id,
        element_id=payload.element_id,
        group_id=payload.group_id,
        name=payload.name,
        classes_raw=payload.classes_raw,
    )

    await create_audit_event(
        scheme_id=scheme.scheme_id,
        event_type="draft.group.created",
        object_type="group",
        object_ref=row.group_record_id,
        details={
            "scheme_version_id": version.scheme_version_id,
            "group_id": row.group_id,
            "name": row.name,
        },
    )

    return CreateGroupResponse(
        scheme_id=scheme.scheme_id,
        scheme_version_id=version.scheme_version_id,
        group_record_id=row.group_record_id,
        element_id=row.element_id,
        group_id=row.group_id,
        name=row.name,
    )


@router.delete(f"{settings.api_v1_prefix}/schemes/{{scheme_id}}/draft/sectors/records/{{sector_record_id}}", response_model=DeleteEntityResponse)
async def delete_draft_sector(
    scheme_id: str,
    sector_record_id: str,
    expected_scheme_version_id: str | None = Query(default=None),
    role: str = Depends(require_api_key),
):
    scheme, version = await get_current_draft_context(
        scheme_id,
        expected_scheme_version_id=expected_scheme_version_id,
    )

    await delete_scheme_version_sector_by_record_id(
        scheme_version_id=version.scheme_version_id,
        sector_record_id=sector_record_id,
    )

    await create_audit_event(
        scheme_id=scheme.scheme_id,
        event_type="draft.sector.deleted",
        object_type="sector",
        object_ref=sector_record_id,
        details={"scheme_version_id": version.scheme_version_id},
    )

    return DeleteEntityResponse(
        scheme_id=scheme.scheme_id,
        scheme_version_id=version.scheme_version_id,
        deleted=True,
        record_id=sector_record_id,
    )


@router.delete(f"{settings.api_v1_prefix}/schemes/{{scheme_id}}/draft/groups/records/{{group_record_id}}", response_model=DeleteEntityResponse)
async def delete_draft_group(
    scheme_id: str,
    group_record_id: str,
    expected_scheme_version_id: str | None = Query(default=None),
    role: str = Depends(require_api_key),
):
    scheme, version = await get_current_draft_context(
        scheme_id,
        expected_scheme_version_id=expected_scheme_version_id,
    )

    await delete_scheme_version_group_by_record_id(
        scheme_version_id=version.scheme_version_id,
        group_record_id=group_record_id,
    )

    await create_audit_event(
        scheme_id=scheme.scheme_id,
        event_type="draft.group.deleted",
        object_type="group",
        object_ref=group_record_id,
        details={"scheme_version_id": version.scheme_version_id},
    )

    return DeleteEntityResponse(
        scheme_id=scheme.scheme_id,
        scheme_version_id=version.scheme_version_id,
        deleted=True,
        record_id=group_record_id,
    )


@router.patch(f"{settings.api_v1_prefix}/schemes/{{scheme_id}}/draft/seats/records/{{seat_record_id}}", response_model=SeatPatchResponse)
async def patch_draft_seat(
    scheme_id: str,
    seat_record_id: str,
    payload: SeatPatchRequest,
    expected_scheme_version_id: str | None = Query(default=None),
    role: str = Depends(require_api_key),
):
    scheme, version = await get_current_draft_context(
        scheme_id,
        expected_scheme_version_id=expected_scheme_version_id,
    )

    await validate_single_seat_patch_uniqueness(
        scheme_version_id=version.scheme_version_id,
        seat_record_id=seat_record_id,
        new_seat_id=payload.seat_id,
    )
    await validate_single_seat_patch_references(
        scheme_version_id=version.scheme_version_id,
        sector_id=payload.sector_id,
        group_id=payload.group_id,
    )

    row = await update_scheme_version_seat_by_record_id(
        scheme_version_id=version.scheme_version_id,
        seat_record_id=seat_record_id,
        seat_id=payload.seat_id,
        sector_id=payload.sector_id,
        group_id=payload.group_id,
        row_label=payload.row_label,
        seat_number=payload.seat_number,
    )

    await create_audit_event(
        scheme_id=scheme.scheme_id,
        event_type="draft.seat.updated",
        object_type="seat",
        object_ref=seat_record_id,
        details={
            "scheme_version_id": version.scheme_version_id,
            "seat_id": payload.seat_id,
            "sector_id": payload.sector_id,
            "group_id": payload.group_id,
            "row_label": payload.row_label,
            "seat_number": payload.seat_number,
        },
    )

    return SeatPatchResponse(
        scheme_id=scheme.scheme_id,
        scheme_version_id=version.scheme_version_id,
        element_id=row.element_id,
        seat_id=row.seat_id,
        sector_id=row.sector_id,
        group_id=row.group_id,
        row_label=row.row_label,
        seat_number=row.seat_number,
    )


@router.post(f"{settings.api_v1_prefix}/schemes/{{scheme_id}}/draft/seats/bulk", response_model=BulkSeatPatchResponse)
async def bulk_patch_draft_seats(
    scheme_id: str,
    payload: BulkSeatPatchRequest,
    expected_scheme_version_id: str | None = Query(default=None),
    role: str = Depends(require_api_key),
):
    scheme, version = await get_current_draft_context(
        scheme_id,
        expected_scheme_version_id=expected_scheme_version_id,
    )

    items = [item.model_dump() for item in payload.items]
    await validate_bulk_seat_patch_uniqueness(
        scheme_version_id=version.scheme_version_id,
        items=items,
    )
    await validate_bulk_seat_patch_references(
        scheme_version_id=version.scheme_version_id,
        items=items,
    )

    rows = await bulk_update_scheme_version_seats_by_record_id(
        scheme_version_id=version.scheme_version_id,
        items=items,
    )

    await create_audit_event(
        scheme_id=scheme.scheme_id,
        event_type="draft.seats.bulk_updated",
        object_type="seat_bulk",
        object_ref=version.scheme_version_id,
        details={
            "scheme_version_id": version.scheme_version_id,
            "updated_count": len(rows),
        },
    )

    return BulkSeatPatchResponse(
        scheme_id=scheme.scheme_id,
        scheme_version_id=version.scheme_version_id,
        updated_count=len(rows),
        items=[
            BulkSeatPatchResultItem(
                seat_record_id=payload.items[idx].seat_record_id,
                updated_seat_id=row.seat_id,
                sector_id=row.sector_id,
                group_id=row.group_id,
                row_label=row.row_label,
                seat_number=row.seat_number,
            )
            for idx, row in enumerate(rows)
        ],
    )


@router.patch(f"{settings.api_v1_prefix}/schemes/{{scheme_id}}/draft/sectors/records/{{sector_record_id}}", response_model=SectorPatchResponse)
async def patch_draft_sector(
    scheme_id: str,
    sector_record_id: str,
    payload: SectorPatchRequest,
    expected_scheme_version_id: str | None = Query(default=None),
    role: str = Depends(require_api_key),
):
    scheme, version = await get_current_draft_context(
        scheme_id,
        expected_scheme_version_id=expected_scheme_version_id,
    )

    await validate_sector_patch_uniqueness(
        scheme_version_id=version.scheme_version_id,
        sector_record_id=sector_record_id,
        new_sector_id=payload.sector_id,
    )

    row, old_sector_id = await update_scheme_version_sector_by_record_id(
        scheme_version_id=version.scheme_version_id,
        sector_record_id=sector_record_id,
        sector_id=payload.sector_id,
        name=payload.name,
    )
    cascaded_count = await cascade_update_seat_sector_reference(
        scheme_version_id=version.scheme_version_id,
        old_sector_id=old_sector_id,
        new_sector_id=payload.sector_id,
    )
    repair_result = await repair_structure_references(
        scheme_version_id=version.scheme_version_id,
    )

    await create_audit_event(
        scheme_id=scheme.scheme_id,
        event_type="draft.sector.updated",
        object_type="sector",
        object_ref=sector_record_id,
        details={
            "scheme_version_id": version.scheme_version_id,
            "old_sector_id": old_sector_id,
            "new_sector_id": payload.sector_id,
            "name": payload.name,
            "cascaded_seats_count": cascaded_count,
            "repair_result": repair_result,
        },
    )

    return SectorPatchResponse(
        scheme_id=scheme.scheme_id,
        scheme_version_id=version.scheme_version_id,
        element_id=row.element_id,
        sector_id=row.sector_id,
        name=row.name,
    )


@router.patch(f"{settings.api_v1_prefix}/schemes/{{scheme_id}}/draft/groups/records/{{group_record_id}}", response_model=GroupPatchResponse)
async def patch_draft_group(
    scheme_id: str,
    group_record_id: str,
    payload: GroupPatchRequest,
    expected_scheme_version_id: str | None = Query(default=None),
    role: str = Depends(require_api_key),
):
    scheme, version = await get_current_draft_context(
        scheme_id,
        expected_scheme_version_id=expected_scheme_version_id,
    )

    await validate_group_patch_uniqueness(
        scheme_version_id=version.scheme_version_id,
        group_record_id=group_record_id,
        new_group_id=payload.group_id,
    )

    row, old_group_id = await update_scheme_version_group_by_record_id(
        scheme_version_id=version.scheme_version_id,
        group_record_id=group_record_id,
        group_id=payload.group_id,
        name=payload.name,
    )
    cascaded_count = await cascade_update_seat_group_reference(
        scheme_version_id=version.scheme_version_id,
        old_group_id=old_group_id,
        new_group_id=payload.group_id,
    )
    repair_result = await repair_structure_references(
        scheme_version_id=version.scheme_version_id,
    )

    await create_audit_event(
        scheme_id=scheme.scheme_id,
        event_type="draft.group.updated",
        object_type="group",
        object_ref=group_record_id,
        details={
            "scheme_version_id": version.scheme_version_id,
            "old_group_id": old_group_id,
            "new_group_id": payload.group_id,
            "name": payload.name,
            "cascaded_seats_count": cascaded_count,
            "repair_result": repair_result,
        },
    )

    return GroupPatchResponse(
        scheme_id=scheme.scheme_id,
        scheme_version_id=version.scheme_version_id,
        element_id=row.element_id,
        group_id=row.group_id,
        name=row.name,
    )


@router.post(f"{settings.api_v1_prefix}/schemes/{{scheme_id}}/draft/repair-references", response_model=RepairReferencesResponse)
async def repair_draft_references(
    scheme_id: str,
    expected_scheme_version_id: str | None = Query(default=None),
    role: str = Depends(require_api_key),
):
    scheme, version = await get_current_draft_context(
        scheme_id,
        expected_scheme_version_id=expected_scheme_version_id,
    )

    result = await repair_structure_references(
        scheme_version_id=version.scheme_version_id,
    )

    await create_audit_event(
        scheme_id=scheme.scheme_id,
        event_type="draft.references.repaired",
        object_type="draft_structure",
        object_ref=version.scheme_version_id,
        details=result,
    )

    return RepairReferencesResponse(
        scheme_id=scheme.scheme_id,
        scheme_version_id=version.scheme_version_id,
        repaired_sector_refs_count=result.get("repaired_sector_refs_count", 0),
        repaired_group_refs_count=result.get("repaired_group_refs_count", 0),
        details=result,
    )