# alembic/versions/v0a1b2c3d4e5_add_vendor_email_settings.py
"""Add vendor email settings table.

Revision ID: v0a1b2c3d4e5
Revises: u9c0d1e2f3g4
Create Date: 2026-01-05

Changes:
- Create vendor_email_settings table for vendor SMTP/email provider configuration
- Vendors must configure this to send transactional emails
- Premium providers (SendGrid, Mailgun, SES) are tier-gated (Business+)
"""

from alembic import op
import sqlalchemy as sa


# revision identifiers, used by Alembic.
revision = "v0a1b2c3d4e5"
down_revision = "u9c0d1e2f3g4"
branch_labels = None
depends_on = None


def upgrade() -> None:
    # Create vendor_email_settings table
    op.create_table(
        "vendor_email_settings",
        sa.Column("id", sa.Integer(), nullable=False),
        sa.Column("vendor_id", sa.Integer(), nullable=False),
        # Sender Identity
        sa.Column("from_email", sa.String(255), nullable=False),
        sa.Column("from_name", sa.String(100), nullable=False),
        sa.Column("reply_to_email", sa.String(255), nullable=True),
        # Signature/Footer
        sa.Column("signature_text", sa.Text(), nullable=True),
        sa.Column("signature_html", sa.Text(), nullable=True),
        # Provider Configuration
        sa.Column("provider", sa.String(20), nullable=False, default="smtp"),
        # SMTP Settings
        sa.Column("smtp_host", sa.String(255), nullable=True),
        sa.Column("smtp_port", sa.Integer(), nullable=True, default=587),
        sa.Column("smtp_username", sa.String(255), nullable=True),
        sa.Column("smtp_password", sa.String(500), nullable=True),
        sa.Column("smtp_use_tls", sa.Boolean(), nullable=False, default=True),
        sa.Column("smtp_use_ssl", sa.Boolean(), nullable=False, default=False),
        # SendGrid Settings
        sa.Column("sendgrid_api_key", sa.String(500), nullable=True),
        # Mailgun Settings
        sa.Column("mailgun_api_key", sa.String(500), nullable=True),
        sa.Column("mailgun_domain", sa.String(255), nullable=True),
        # Amazon SES Settings
        sa.Column("ses_access_key_id", sa.String(100), nullable=True),
        sa.Column("ses_secret_access_key", sa.String(500), nullable=True),
        sa.Column("ses_region", sa.String(50), nullable=True, default="eu-west-1"),
        # Status & Verification
        sa.Column("is_configured", sa.Boolean(), nullable=False, default=False),
        sa.Column("is_verified", sa.Boolean(), nullable=False, default=False),
        sa.Column("last_verified_at", sa.DateTime(timezone=True), nullable=True),
        sa.Column("verification_error", sa.Text(), nullable=True),
        # Timestamps
        sa.Column("created_at", sa.DateTime(), nullable=False),
        sa.Column("updated_at", sa.DateTime(), nullable=False),
        # Constraints
        sa.PrimaryKeyConstraint("id"),
        sa.ForeignKeyConstraint(
            ["vendor_id"],
            ["vendors.id"],
            name="fk_vendor_email_settings_vendor_id",
            ondelete="CASCADE",
        ),
        sa.UniqueConstraint("vendor_id", name="uq_vendor_email_settings_vendor_id"),
    )

    # Create indexes
    op.create_index(
        "ix_vendor_email_settings_id",
        "vendor_email_settings",
        ["id"],
        unique=False,
    )
    op.create_index(
        "ix_vendor_email_settings_vendor_id",
        "vendor_email_settings",
        ["vendor_id"],
        unique=True,
    )
    op.create_index(
        "idx_vendor_email_settings_configured",
        "vendor_email_settings",
        ["vendor_id", "is_configured"],
    )


def downgrade() -> None:
    # Drop indexes
    op.drop_index("idx_vendor_email_settings_configured", table_name="vendor_email_settings")
    op.drop_index("ix_vendor_email_settings_vendor_id", table_name="vendor_email_settings")
    op.drop_index("ix_vendor_email_settings_id", table_name="vendor_email_settings")

    # Drop table
    op.drop_table("vendor_email_settings")