"""unique post ap id

Revision ID: 299e0384c8f3
Revises: 7f7dfd4d4f1b
Create Date: 2024-11-24 15:18:51.979847

"""
from alembic import op
import sqlalchemy as sa
from sqlalchemy import text

# revision identifiers, used by Alembic.
revision = '299e0384c8f3'
down_revision = '7f7dfd4d4f1b'
branch_labels = None
depends_on = None


def upgrade():
    # Find duplicate posts by ap_id
    dupes_query = text('''
                SELECT ap_id FROM "post" 
                GROUP BY ap_id 
                HAVING COUNT(*) > 1
            ''')

    conn = op.get_bind()
    duplicate_posts = conn.execute(dupes_query).scalars()
    print('Cleaning up duplicate posts, this may take a while...')

    for ap_id in duplicate_posts:
        if ap_id is None:
            continue
        # Get all communities with the same ap_profile_id, ordered by ID
        users_query = text('''
                    SELECT id FROM "post" 
                    WHERE ap_id = :ap_id 
                    ORDER BY id
                ''')
        posts = conn.execute(users_query, {"ap_id": ap_id}).fetchall()

        # Set the lowest ID as the new_id, and collect other IDs to update/delete
        new_id = posts[0].id
        old_ids = [post.id for post in posts[1:]]

        print(ap_id)

        if old_ids:
            # Update tables with batch IN clause
            conn.execute(text('UPDATE "post_reply" SET post_id = :new_id WHERE post_id IN :old_ids'), {"new_id": new_id, "old_ids": tuple(old_ids)})
            conn.execute(text('DELETE FROM "post_tag" WHERE post_id IN :old_ids'), {"old_ids": tuple(old_ids)})
            conn.execute(text('DELETE FROM "read_posts" WHERE read_post_id IN :old_ids'), {"old_ids": tuple(old_ids)})
            conn.execute(text('DELETE FROM "post_vote" WHERE post_id IN :old_ids'), {"old_ids": tuple(old_ids)})
            conn.execute(text('DELETE FROM "report" WHERE suspect_post_id IN :old_ids'), {"old_ids": tuple(old_ids)})

            # Delete the duplicate posts
            conn.execute(text('DELETE FROM "post" WHERE id IN :old_ids'), {"old_ids": tuple(old_ids)})
    # ### commands auto generated by Alembic - please adjust! ###
    with op.batch_alter_table('post', schema=None) as batch_op:
        batch_op.drop_index('ix_post_ap_id')
        batch_op.create_index(batch_op.f('ix_post_ap_id'), ['ap_id'], unique=True)

    # ### end Alembic commands ###


def downgrade():
    # ### commands auto generated by Alembic - please adjust! ###
    with op.batch_alter_table('post', schema=None) as batch_op:
        batch_op.drop_index(batch_op.f('ix_post_ap_id'))
        batch_op.create_index('ix_post_ap_id', ['ap_id'], unique=False)

    # ### end Alembic commands ###