"""add_missing_user_fields

Revision ID: 002_add_missing_user_fields
Revises: 001_initial_baseline
Create Date: 2026-01-04

Adds missing user fields to sync models.py with database:
- scholarship_reason
- directory_* fields (email, bio, address, phone, dob, partner_name)
- profile_photo_url (rename from profile_image_url)
- social_media_* fields (facebook, instagram, twitter, linkedin)
- email_verification_expires
"""
from typing import Sequence, Union
from alembic import op
import sqlalchemy as sa


# revision identifiers, used by Alembic.
revision: str = '002_add_missing_user_fields'
down_revision: Union[str, None] = '001_initial_baseline'
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    """Add missing user fields (skip if already exists)"""
    from sqlalchemy import inspect

    conn = op.get_bind()
    inspector = inspect(conn)
    existing_columns = {col['name'] for col in inspector.get_columns('users')}

    # Add scholarship_reason
    if 'scholarship_reason' not in existing_columns:
        op.add_column('users', sa.Column('scholarship_reason', sa.Text(), nullable=True))

    # Add directory fields
    if 'directory_email' not in existing_columns:
        op.add_column('users', sa.Column('directory_email', sa.String(), nullable=True))
    if 'directory_bio' not in existing_columns:
        op.add_column('users', sa.Column('directory_bio', sa.Text(), nullable=True))
    if 'directory_address' not in existing_columns:
        op.add_column('users', sa.Column('directory_address', sa.String(), nullable=True))
    if 'directory_phone' not in existing_columns:
        op.add_column('users', sa.Column('directory_phone', sa.String(), nullable=True))
    if 'directory_dob' not in existing_columns:
        op.add_column('users', sa.Column('directory_dob', sa.DateTime(), nullable=True))
    if 'directory_partner_name' not in existing_columns:
        op.add_column('users', sa.Column('directory_partner_name', sa.String(), nullable=True))

    # Rename profile_image_url to profile_photo_url (skip if already renamed)
    if 'profile_image_url' in existing_columns and 'profile_photo_url' not in existing_columns:
        op.alter_column('users', 'profile_image_url', new_column_name='profile_photo_url')

    # Add social media fields
    if 'social_media_facebook' not in existing_columns:
        op.add_column('users', sa.Column('social_media_facebook', sa.String(), nullable=True))
    if 'social_media_instagram' not in existing_columns:
        op.add_column('users', sa.Column('social_media_instagram', sa.String(), nullable=True))
    if 'social_media_twitter' not in existing_columns:
        op.add_column('users', sa.Column('social_media_twitter', sa.String(), nullable=True))
    if 'social_media_linkedin' not in existing_columns:
        op.add_column('users', sa.Column('social_media_linkedin', sa.String(), nullable=True))

    # Add email_verification_expires if missing
    if 'email_verification_expires' not in existing_columns:
        op.add_column('users', sa.Column('email_verification_expires', sa.DateTime(), nullable=True))


def downgrade() -> None:
    """Remove added fields (rollback)"""

    # Remove social media fields
    op.drop_column('users', 'social_media_linkedin')
    op.drop_column('users', 'social_media_twitter')
    op.drop_column('users', 'social_media_instagram')
    op.drop_column('users', 'social_media_facebook')

    # Rename profile_photo_url back to profile_image_url
    op.alter_column('users', 'profile_photo_url', new_column_name='profile_image_url')

    # Remove directory fields
    op.drop_column('users', 'directory_partner_name')
    op.drop_column('users', 'directory_dob')
    op.drop_column('users', 'directory_phone')
    op.drop_column('users', 'directory_address')
    op.drop_column('users', 'directory_bio')
    op.drop_column('users', 'directory_email')

    # Remove scholarship_reason
    op.drop_column('users', 'scholarship_reason')