"""Phase 6B employee ESS and registration requests

Revision ID: 20260514_phase_6b_employee_ess_registration
Revises: 20260513_phase_6a_employees_core
Create Date: 2026-05-10
"""
from __future__ import annotations

from alembic import op
import sqlalchemy as sa

revision = "20260514_phase_6b_employee_ess_registration"
down_revision = "20260513_phase_6a_employees_core"
branch_labels = None
depends_on = None


def upgrade() -> None:
    op.create_table(
        "employee_registration_requests",
        sa.Column("id", sa.Integer(), autoincrement=True, nullable=False),
        sa.Column("tenant_id", sa.Integer(), nullable=False),
        sa.Column("branch_id", sa.Integer(), nullable=False),
        sa.Column("user_id", sa.Integer(), nullable=False),
        sa.Column("requested_employee_code", sa.String(length=50), nullable=True),
        sa.Column("full_name", sa.String(length=255), nullable=False),
        sa.Column("email", sa.String(length=255), nullable=True),
        sa.Column("mobile", sa.String(length=20), nullable=True),
        sa.Column("department", sa.String(length=100), nullable=True),
        sa.Column("designation", sa.String(length=100), nullable=True),
        sa.Column("date_of_joining", sa.Date(), nullable=True),
        sa.Column("remarks", sa.Text(), nullable=True),
        sa.Column("status", sa.String(length=30), nullable=False, server_default="pending"),
        sa.Column("review_notes", sa.Text(), nullable=True),
        sa.Column("reviewed_by_user_id", sa.Integer(), nullable=True),
        sa.Column("reviewed_at_utc", sa.DateTime(timezone=True), nullable=True),
        sa.Column("created_employee_id", sa.Integer(), nullable=True),
        sa.Column("created_at_utc", sa.DateTime(timezone=True), nullable=False),
        sa.Column("updated_at_utc", sa.DateTime(timezone=True), nullable=False),
        sa.ForeignKeyConstraint(["branch_id"], ["branches.id"]),
        sa.ForeignKeyConstraint(["created_employee_id"], ["employees.id"], ondelete="SET NULL"),
        sa.ForeignKeyConstraint(["reviewed_by_user_id"], ["users.id"], ondelete="SET NULL"),
        sa.ForeignKeyConstraint(["tenant_id"], ["tenants.id"], ondelete="CASCADE"),
        sa.ForeignKeyConstraint(["user_id"], ["users.id"], ondelete="CASCADE"),
        sa.PrimaryKeyConstraint("id"),
    )
    for col in [
        "tenant_id",
        "branch_id",
        "user_id",
        "requested_employee_code",
        "full_name",
        "email",
        "department",
        "designation",
        "status",
        "created_employee_id",
    ]:
        op.create_index(f"ix_employee_registration_requests_{col}", "employee_registration_requests", [col], unique=False)


def downgrade() -> None:
    op.drop_table("employee_registration_requests")