from datetime import date, datetime
from decimal import Decimal

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

from app.core.database import Base
from app.modules.business.constants import SourceSystem, StatusValue
from app.modules.business.models.common import TimestampMixin


class Employee(Base, TimestampMixin):
    __tablename__ = "employees"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    code: Mapped[str] = mapped_column(String(64), unique=True, index=True)
    name: Mapped[str] = mapped_column(String(128), index=True)
    department_code: Mapped[str | None] = mapped_column(String(64), nullable=True, index=True)
    department_name: Mapped[str | None] = mapped_column(String(128), nullable=True, index=True)
    title: Mapped[str | None] = mapped_column(String(128), nullable=True)
    employment_status: Mapped[str] = mapped_column(
        String(32), default=StatusValue.UNKNOWN, index=True
    )
    hired_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)
    ding_user_id: Mapped[str | None] = mapped_column(String(64), nullable=True, index=True)
    source_system: Mapped[str] = mapped_column(String(64), default=SourceSystem.LEGACY_MYSQL)
    external_id: Mapped[str] = mapped_column(String(128), index=True)
    source_created_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)
    source_updated_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True, index=True)
    last_seen_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True, index=True)
    is_active: Mapped[bool] = mapped_column(Boolean, default=True, index=True)


class ProjectMember(Base, TimestampMixin):
    __tablename__ = "project_members"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    code: Mapped[str] = mapped_column(String(64), unique=True, index=True)
    project_code: Mapped[str] = mapped_column(String(64), index=True)
    employee_code: Mapped[str] = mapped_column(String(64), index=True)
    role_name: Mapped[str | None] = mapped_column(String(128), nullable=True, index=True)
    is_leader: Mapped[bool] = mapped_column(Boolean, default=False, index=True)
    is_resident: Mapped[bool] = mapped_column(Boolean, default=False)
    work_mode: Mapped[str | None] = mapped_column(Text, nullable=True)
    planned_days: Mapped[int | None] = mapped_column(Integer, nullable=True)
    workload_percent: Mapped[int | None] = mapped_column(Integer, nullable=True)
    source_system: Mapped[str] = mapped_column(String(64), default=SourceSystem.LEGACY_MYSQL)
    external_id: Mapped[str] = mapped_column(String(128), index=True)
    source_created_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)
    last_seen_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True, index=True)
    is_active: Mapped[bool] = mapped_column(Boolean, default=True, index=True)


class ProjectMilestone(Base, TimestampMixin):
    __tablename__ = "project_milestones"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    code: Mapped[str] = mapped_column(String(128), unique=True, index=True)
    project_code: Mapped[str] = mapped_column(String(64), index=True)
    source_stage_id: Mapped[str] = mapped_column(String(64), index=True)
    stage_name: Mapped[str] = mapped_column(String(128), index=True)
    plan_start: Mapped[date | None] = mapped_column(Date, nullable=True)
    plan_end: Mapped[date | None] = mapped_column(Date, nullable=True, index=True)
    status: Mapped[str] = mapped_column(String(32), default=StatusValue.UNKNOWN, index=True)
    is_overdue: Mapped[bool] = mapped_column(Boolean, default=False, index=True)
    activity_total: Mapped[int] = mapped_column(Integer, default=0)
    activity_completed: Mapped[int] = mapped_column(Integer, default=0)
    source_system: Mapped[str] = mapped_column(String(64), default=SourceSystem.LEGACY_MYSQL)
    external_id: Mapped[str] = mapped_column(String(128), index=True)
    source_updated_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True, index=True)
    last_seen_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True, index=True)
    is_active: Mapped[bool] = mapped_column(Boolean, default=True, index=True)


class ProjectContract(Base, TimestampMixin):
    __tablename__ = "project_contracts"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    code: Mapped[str] = mapped_column(String(64), unique=True, index=True)
    project_code: Mapped[str | None] = mapped_column(String(64), nullable=True, index=True)
    contract_type_code: Mapped[str | None] = mapped_column(String(32), nullable=True, index=True)
    contract_type_label: Mapped[str | None] = mapped_column(String(128), nullable=True)
    amount: Mapped[Decimal] = mapped_column(Numeric(16, 2), default=0)
    signed_date: Mapped[date | None] = mapped_column(Date, nullable=True, index=True)
    start_date: Mapped[date | None] = mapped_column(Date, nullable=True)
    end_date: Mapped[date | None] = mapped_column(Date, nullable=True)
    invoice_type_code: Mapped[str | None] = mapped_column(String(32), nullable=True)
    data_quality_status: Mapped[str] = mapped_column(String(32), index=True)
    source_system: Mapped[str] = mapped_column(String(64), default=SourceSystem.LEGACY_MYSQL)
    external_id: Mapped[str] = mapped_column(String(128), index=True)
    source_created_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)
    last_seen_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True, index=True)
    is_active: Mapped[bool] = mapped_column(Boolean, default=True, index=True)


class ProjectCashFlow(Base, TimestampMixin):
    __tablename__ = "project_cash_flows"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    code: Mapped[str] = mapped_column(String(64), unique=True, index=True)
    project_code: Mapped[str | None] = mapped_column(String(64), nullable=True, index=True)
    contract_code: Mapped[str | None] = mapped_column(String(64), nullable=True, index=True)
    flow_type: Mapped[str] = mapped_column(String(32), index=True)
    direction: Mapped[str] = mapped_column(String(16), index=True)
    category_code: Mapped[str | None] = mapped_column(String(32), nullable=True, index=True)
    category_label: Mapped[str | None] = mapped_column(String(128), nullable=True)
    planned_amount: Mapped[Decimal] = mapped_column(Numeric(16, 2), default=0)
    actual_amount: Mapped[Decimal | None] = mapped_column(Numeric(16, 2), nullable=True)
    planned_date: Mapped[date | None] = mapped_column(Date, nullable=True, index=True)
    actual_date: Mapped[date | None] = mapped_column(Date, nullable=True, index=True)
    payment_status: Mapped[str | None] = mapped_column(String(32), nullable=True, index=True)
    invoice_status: Mapped[str | None] = mapped_column(String(32), nullable=True)
    approval_status: Mapped[str | None] = mapped_column(String(32), nullable=True, index=True)
    confirmation_status: Mapped[str | None] = mapped_column(String(32), nullable=True)
    data_quality_status: Mapped[str] = mapped_column(String(32), index=True)
    source_system: Mapped[str] = mapped_column(String(64), default=SourceSystem.LEGACY_MYSQL)
    external_id: Mapped[str] = mapped_column(String(128), index=True)
    source_created_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)
    source_updated_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True, index=True)
    last_seen_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True, index=True)
    is_active: Mapped[bool] = mapped_column(Boolean, default=True, index=True)


class SourceSyncCursor(Base, TimestampMixin):
    __tablename__ = "source_sync_cursors"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    dataset: Mapped[str] = mapped_column(String(64), unique=True, index=True)
    status: Mapped[str] = mapped_column(String(32), default=StatusValue.PENDING, index=True)
    watermark_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)
    watermark_key: Mapped[str | None] = mapped_column(String(128), nullable=True)
    last_run_code: Mapped[str | None] = mapped_column(String(64), nullable=True, index=True)
    last_success_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True, index=True)
    processed_count: Mapped[int] = mapped_column(Integer, default=0)
    error_message: Mapped[str | None] = mapped_column(Text, nullable=True)