"""phase9: add email_logs table

Revision ID: 002_phase9
Revises: 001_phase5
Create Date: 2026-03-16

Stores every email send attempt for delivery monitoring.
"""
from alembic import op
import sqlalchemy as sa

revision = "002_phase9"
down_revision = "001_phase5"
branch_labels = None
depends_on = None


def upgrade() -> None:
    op.create_table(
        "email_logs",
        sa.Column("id", sa.String(36), primary_key=True),
        sa.Column("school_id", sa.String(36), sa.ForeignKey("schools.id", ondelete="SET NULL"), nullable=True),
        sa.Column("to_email", sa.String(255), nullable=False),
        sa.Column("subject", sa.String(500), nullable=False),
        sa.Column("email_type", sa.String(30), nullable=False),
        sa.Column("status", sa.String(10), nullable=False),
        sa.Column("error_message", sa.Text, nullable=True),
        sa.Column("sent_at", sa.DateTime(timezone=True), nullable=True),
        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
    )
    op.create_index("ix_email_logs_school_id", "email_logs", ["school_id"])
    op.create_index("ix_email_logs_to_email", "email_logs", ["to_email"])
    op.create_index("ix_email_logs_email_type", "email_logs", ["email_type"])
    op.create_index("ix_email_logs_status", "email_logs", ["status"])


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