from __future__ import annotations

from datetime import datetime, timezone

from sqlalchemy import DateTime, Float, ForeignKey, Integer, String, Text, UniqueConstraint
from sqlalchemy.orm import Mapped, mapped_column

from app.core.db.common import CommonBase


class AccountingBankTransaction(CommonBase):
    __tablename__ = "accounting_bank_transactions"
    __table_args__ = (
        UniqueConstraint("tenant_id", "client_id", "fingerprint", name="uq_accounting_bank_tx_fingerprint"),
    )

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    tenant_id: Mapped[int] = mapped_column(ForeignKey("tenants.id", ondelete="CASCADE"), nullable=False, index=True)
    client_id: Mapped[int] = mapped_column(ForeignKey("clients.id", ondelete="CASCADE"), nullable=False, index=True)
    source_job_id: Mapped[str | None] = mapped_column(ForeignKey("bank_statement_analysis_jobs.id", ondelete="SET NULL"), nullable=True, index=True)
    fingerprint: Mapped[str] = mapped_column(String(80), nullable=False, index=True)

    statement_id: Mapped[str] = mapped_column(String(40), nullable=False, default="")
    bank_name: Mapped[str] = mapped_column(String(160), nullable=False, default="")
    account_number: Mapped[str] = mapped_column(String(100), nullable=False, default="")
    customer_name: Mapped[str] = mapped_column(String(255), nullable=False, default="")
    transaction_date: Mapped[str] = mapped_column(String(20), nullable=False, default="", index=True)
    value_date: Mapped[str] = mapped_column(String(20), nullable=False, default="")
    narration: Mapped[str] = mapped_column(Text, nullable=False, default="")
    reference_no: Mapped[str] = mapped_column(String(180), nullable=False, default="")
    transfer_reference: Mapped[str] = mapped_column(String(180), nullable=False, default="")
    direction: Mapped[str] = mapped_column(String(10), nullable=False, default="")
    debit: Mapped[float] = mapped_column(Float, nullable=False, default=0)
    credit: Mapped[float] = mapped_column(Float, nullable=False, default=0)
    amount: Mapped[float] = mapped_column(Float, nullable=False, default=0)

    auto_party: Mapped[str] = mapped_column(String(255), nullable=False, default="")
    analyzer_category: Mapped[str] = mapped_column(String(255), nullable=False, default="")
    analyzer_nature: Mapped[str] = mapped_column(String(160), nullable=False, default="")
    analyzer_ledger: Mapped[str] = mapped_column(String(255), nullable=False, default="")

    contra_pair_id: Mapped[str] = mapped_column(String(60), nullable=False, default="", index=True)
    contra_counter_bank: Mapped[str] = mapped_column(String(160), nullable=False, default="")
    contra_counter_account: Mapped[str] = mapped_column(String(100), nullable=False, default="")
    contra_confidence: Mapped[float] = mapped_column(Float, nullable=False, default=0)
    contra_reason: Mapped[str | None] = mapped_column(Text, nullable=True)

    tally_guid: Mapped[str] = mapped_column(String(120), nullable=False, default="")
    suggested_nature_id: Mapped[int | None] = mapped_column(ForeignKey("accounting_natures.id", ondelete="SET NULL"), nullable=True)
    suggested_ledger_name: Mapped[str] = mapped_column(String(255), nullable=False, default="")
    suggested_confidence: Mapped[int] = mapped_column(Integer, nullable=False, default=0)
    suggestion_reason_json: Mapped[str | None] = mapped_column(Text, nullable=True)
    suggested_voucher_type: Mapped[str] = mapped_column(String(20), nullable=False, default="")

    review_status: Mapped[str] = mapped_column(String(20), nullable=False, default="pending", index=True)
    final_nature_id: Mapped[int | None] = mapped_column(ForeignKey("accounting_natures.id", ondelete="SET NULL"), nullable=True)
    final_ledger_name: Mapped[str] = mapped_column(String(255), nullable=False, default="")
    final_party_ledger_name: Mapped[str] = mapped_column(String(255), nullable=False, default="")
    final_bank_ledger_name: Mapped[str] = mapped_column(String(255), nullable=False, default="")
    final_other_bank_ledger_name: Mapped[str] = mapped_column(String(255), nullable=False, default="")
    final_voucher_type: Mapped[str] = mapped_column(String(20), nullable=False, default="")
    review_note: Mapped[str | None] = mapped_column(Text, nullable=True)
    reviewed_by_user_id: Mapped[int | None] = mapped_column(ForeignKey("users.id", ondelete="SET NULL"), nullable=True)
    reviewed_at_utc: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)

    workstation_agent_id: Mapped[int | None] = mapped_column(ForeignKey("erp_workstation_agents.id", ondelete="SET NULL"), nullable=True)
    preflight_job_id: Mapped[int | None] = mapped_column(ForeignKey("erp_agent_jobs.id", ondelete="SET NULL"), nullable=True)
    posting_job_id: Mapped[int | None] = mapped_column(ForeignKey("erp_agent_jobs.id", ondelete="SET NULL"), nullable=True)
    preflight_result_json: Mapped[str | None] = mapped_column(Text, nullable=True)
    posting_result_json: Mapped[str | None] = mapped_column(Text, nullable=True)
    posting_status: Mapped[str] = mapped_column(String(30), nullable=False, default="not_started", index=True)
    last_error: Mapped[str | None] = mapped_column(Text, nullable=True)
    tally_voucher_id: Mapped[str] = mapped_column(String(120), nullable=False, default="")
    tally_voucher_number: Mapped[str] = mapped_column(String(160), nullable=False, default="")
    posted_by_user_id: Mapped[int | None] = mapped_column(ForeignKey("users.id", ondelete="SET NULL"), nullable=True)
    posted_at_utc: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)

    created_at_utc: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False, default=lambda: datetime.now(timezone.utc), index=True)
    updated_at_utc: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False, default=lambda: datetime.now(timezone.utc), onupdate=lambda: datetime.now(timezone.utc))