from __future__ import annotations

import inspect

from ...service import (
    approve_settlement_draft as approve_settlement_draft,
    cancel_settlement_draft as cancel_settlement_draft,
    correct_account_valuation as correct_account_valuation,
    create_settlement_draft as create_settlement_draft,
    finalize_settlement_draft as finalize_settlement_draft,
    get_settlement_draft as get_settlement_draft,
    get_monthly_settlement_snapshot as get_monthly_settlement_snapshot,
    list_monthly_settlement_history as list_monthly_settlement_history,
    get_monthly_settlement_history_record as get_monthly_settlement_history_record,
    get_monthly_settlement_record as get_monthly_settlement_record,
    list_account_snapshots_for_settlement as list_account_snapshots_for_settlement,
    link_account_snapshot as link_account_snapshot,
    unlink_account_snapshot as unlink_account_snapshot,
    update_account_snapshot_category as update_account_snapshot_category,
    list_account_valuations as list_account_valuations,
    list_settlement_drafts as list_settlement_drafts,
    refresh_settlement_draft_targets as refresh_settlement_draft_targets,
    register_account_valuation as register_account_valuation,
    review_settlement_draft as review_settlement_draft,
    set_settlement_draft_item as set_settlement_draft_item,
    set_settlement_cashflow_policy as set_settlement_cashflow_policy,
    update_settlement_draft as update_settlement_draft,
)
from ...application import settlement_draft_service as _draft_service
from ...application import monthly_settlement_service as _monthly_service
from ...application.transaction_report_services import get_monthly_cashflow_report as get_monthly_cashflow_report
from ...application.transaction_report_services import get_settlement_cashflow_snapshot as get_settlement_cashflow_snapshot
from ... import service as _service


def _resolve_db_path() -> str:
    from ...db import resolve_db_path
    return str(resolve_db_path())


def _guard(db_path: str | None) -> str:
    return db_path or _resolve_db_path()


def create_monthly_settlement(month: str, created_by: str = "dashboard-admin", *, db_path=None):
    return _monthly_service.create_monthly_settlement(month, created_by=created_by, db_path=_guard(db_path))

def get_monthly_cashflow(month: str, *, settlement_id=None, closed=False, db_path=None):
    if closed:
        return get_settlement_cashflow_snapshot(str(settlement_id), db_path=_guard(db_path))
    return get_monthly_cashflow_report(month, db_path=_guard(db_path))


def review_monthly_settlement(settlement_id: str, *, db_path=None):
    return _monthly_service.review_monthly_settlement(settlement_id, db_path=_guard(db_path))


def approve_monthly_settlement(settlement_id: str, expected_version: int, review_fingerprint: str, approved_by: str = "dashboard-admin", *, db_path=None):
    return _monthly_service.approve_monthly_settlement(settlement_id, expected_version, review_fingerprint, approved_by=approved_by, db_path=_guard(db_path))


def close_monthly_settlement(settlement_id: str, expected_version: int, closed_by: str = "dashboard-admin", *, db_path=None):
    return _monthly_service.close_monthly_settlement(settlement_id, expected_version, closed_by=closed_by, db_path=_guard(db_path))


def cancel_monthly_settlement_approval(settlement_id: str, expected_version: int, approved_by: str = "dashboard-admin", *, db_path=None):
    return _monthly_service.cancel_monthly_settlement_approval(settlement_id, expected_version, approved_by=approved_by, db_path=_guard(db_path))


def _wrap(fn):
    def call(*args, db_path=None, **kwargs):
        if fn.__name__ == "set_settlement_cashflow_policy":
            target = _draft_service
        elif fn.__name__ in {"get_monthly_settlement_snapshot", "list_monthly_settlement_history", "get_monthly_settlement_history_record", "get_monthly_settlement_record", "list_account_snapshots_for_settlement", "link_account_snapshot", "unlink_account_snapshot"}:
            target = _monthly_service
        else:
            target = _draft_service if fn.__name__ in {"create_settlement_draft", "list_settlement_drafts", "get_settlement_draft", "update_settlement_draft", "refresh_settlement_draft_targets", "set_settlement_draft_item", "review_settlement_draft", "approve_settlement_draft", "finalize_settlement_draft", "cancel_settlement_draft"} else _service
        return getattr(target, fn.__name__)(*args, db_path=_guard(db_path), **kwargs)
    call.__name__ = fn.__name__
    call.__doc__ = fn.__doc__
    call.__signature__ = inspect.signature(fn)
    return call


# Keep the service signatures unchanged; path resolution/auth is adapter policy.
for _name in (
    "create_settlement_draft", "list_settlement_drafts", "get_settlement_draft",
    "update_settlement_draft", "refresh_settlement_draft_targets",
    "set_settlement_draft_item", "review_settlement_draft",
    "approve_settlement_draft", "finalize_settlement_draft", "cancel_settlement_draft",
    "cancel_monthly_settlement_approval",
    "register_account_valuation", "list_account_valuations", "correct_account_valuation",
    "set_settlement_cashflow_policy", "get_monthly_settlement_snapshot",
    "list_monthly_settlement_history", "get_monthly_settlement_history_record", "get_monthly_settlement_record", "list_account_snapshots_for_settlement", "link_account_snapshot", "unlink_account_snapshot", "update_account_snapshot_category",
):
    globals()[_name] = _wrap(getattr(_service, _name))

__all__ = [
    "create_settlement_draft", "list_settlement_drafts", "get_settlement_draft",
    "update_settlement_draft", "refresh_settlement_draft_targets",
    "set_settlement_draft_item", "review_settlement_draft",
    "approve_settlement_draft", "finalize_settlement_draft", "cancel_settlement_draft",
    "cancel_monthly_settlement_approval",
    "register_account_valuation", "list_account_valuations", "correct_account_valuation",
    "set_settlement_cashflow_policy", "get_monthly_settlement_snapshot",
    "list_monthly_settlement_history", "get_monthly_settlement_history_record", "get_monthly_settlement_record", "list_account_snapshots_for_settlement",
    "get_monthly_cashflow",
]