from __future__ import annotations

from datetime import datetime, timezone

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

from app.core.db.common import CommonBase


class BankStatementAnalysisJob(CommonBase):
    __tablename__ = "bank_statement_analysis_jobs"

    id: Mapped[str] = mapped_column(String(32), primary_key=True)
    tenant_id: Mapped[int | None] = mapped_column(ForeignKey("tenants.id", ondelete="CASCADE"), nullable=True, index=True)
    branch_id: Mapped[int | None] = mapped_column(ForeignKey("branches.id", ondelete="SET NULL"), nullable=True, index=True)
    user_id: Mapped[int] = mapped_column(ForeignKey("users.id", ondelete="CASCADE"), nullable=False, index=True)
    role_bucket: Mapped[str] = mapped_column(String(30), nullable=False)

    # Phase 11B: optional client-aware analysis.  Null preserves the existing
    # standalone Work-folder behavior exactly.
    client_id: Mapped[int | None] = mapped_column(ForeignKey("clients.id", ondelete="SET NULL"), nullable=True, index=True)
    engagement_id: Mapped[int | None] = mapped_column(ForeignKey("client_service_subscriptions.id", ondelete="SET NULL"), nullable=True, index=True)
    ownership_confirmation: Mapped[bool] = mapped_column(Boolean, nullable=False, default=False)
    ownership_status: Mapped[str] = mapped_column(String(30), nullable=False, default="not_checked", index=True)
    ownership_validation_json: Mapped[str | None] = mapped_column(Text, nullable=True)
    engagement_archive_status: Mapped[str] = mapped_column(String(30), nullable=False, default="not_requested", index=True)
    engagement_archive_json: Mapped[str | None] = mapped_column(Text, nullable=True)

    selected_bank: Mapped[str] = mapped_column(String(40), nullable=False, default="auto")
    financial_year: Mapped[str | None] = mapped_column(String(20), nullable=True)
    customer_override: Mapped[str | None] = mapped_column(String(255), nullable=True)
    account_override: Mapped[str | None] = mapped_column(String(100), nullable=True)
    classification_enabled: Mapped[bool] = mapped_column(Boolean, nullable=False, default=True)

    # Phase 19: one analyzer, three controlled uses. Existing jobs default to
    # analyze_only and preserve the historical Bank Analyzer behaviour.
    purpose: Mapped[str] = mapped_column(String(30), nullable=False, default="analyze_only", index=True)
    accounting_import_status: Mapped[str] = mapped_column(String(30), nullable=False, default="not_requested", index=True)
    accounting_import_json: Mapped[str | None] = mapped_column(Text, nullable=True)

    status: Mapped[str] = mapped_column(String(20), nullable=False, default="queued", index=True)
    progress_percent: Mapped[int] = mapped_column(Integer, nullable=False, default=0)
    file_count: Mapped[int] = mapped_column(Integer, nullable=False, default=0)
    input_files_json: Mapped[str] = mapped_column(Text, nullable=False)
    job_directory: Mapped[str] = mapped_column(Text, nullable=False)
    output_file: Mapped[str | None] = mapped_column(Text, nullable=True)
    summary_json: Mapped[str | None] = mapped_column(Text, nullable=True)
    error_message: Mapped[str | None] = mapped_column(Text, nullable=True)

    submitted_at_utc: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False, default=lambda: datetime.now(timezone.utc), index=True)
    started_at_utc: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
    completed_at_utc: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
    expires_at_utc: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True, index=True)