"""Collaboration tables (comments, mentions, notifications, blockers)

Revision ID: 004
Revises: 003
Create Date: 2024-01-XX

"""
from alembic import op
import sqlalchemy as sa

# revision identifiers, used by Alembic.
revision = '004'
down_revision = '003'
branch_labels = None
depends_on = None


def upgrade() -> None:
    # Create notification_type_enum
    notification_type_enum = sa.Enum(
        'mention', 'assignment', 'blocker', 'status_change', 'comment', 'blocker_resolved',
        name='notification_type_enum'
    )
    notification_type_enum.create(op.get_bind(), checkfirst=True)

    # Create pjctrl_comments table
    op.create_table(
        'pjctrl_comments',
        sa.Column('id', sa.String(36), primary_key=True),
        sa.Column('task_id', sa.String(36), sa.ForeignKey('pjctrl_tasks.id', ondelete='CASCADE'), nullable=False),
        sa.Column('parent_comment_id', sa.String(36), sa.ForeignKey('pjctrl_comments.id', ondelete='CASCADE'), nullable=True),
        sa.Column('author_id', sa.String(36), sa.ForeignKey('pjctrl_users.id'), nullable=False),
        sa.Column('content', sa.Text, nullable=False),
        sa.Column('is_edited', sa.Boolean, server_default='0', nullable=False),
        sa.Column('is_deleted', sa.Boolean, server_default='0', nullable=False),
        sa.Column('created_at', sa.DateTime, server_default=sa.func.now(), nullable=False),
        sa.Column('updated_at', sa.DateTime, server_default=sa.func.now(), onupdate=sa.func.now(), nullable=False),
    )
    op.create_index('idx_comments_task', 'pjctrl_comments', ['task_id'])
    op.create_index('idx_comments_author', 'pjctrl_comments', ['author_id'])
    op.create_index('idx_comments_parent', 'pjctrl_comments', ['parent_comment_id'])

    # Create pjctrl_mentions table
    op.create_table(
        'pjctrl_mentions',
        sa.Column('id', sa.String(36), primary_key=True),
        sa.Column('comment_id', sa.String(36), sa.ForeignKey('pjctrl_comments.id', ondelete='CASCADE'), nullable=False),
        sa.Column('mentioned_user_id', sa.String(36), sa.ForeignKey('pjctrl_users.id'), nullable=False),
        sa.Column('created_at', sa.DateTime, server_default=sa.func.now(), nullable=False),
    )
    op.create_index('idx_mentions_comment', 'pjctrl_mentions', ['comment_id'])
    op.create_index('idx_mentions_user', 'pjctrl_mentions', ['mentioned_user_id'])

    # Create pjctrl_notifications table
    op.create_table(
        'pjctrl_notifications',
        sa.Column('id', sa.String(36), primary_key=True),
        sa.Column('user_id', sa.String(36), sa.ForeignKey('pjctrl_users.id', ondelete='CASCADE'), nullable=False),
        sa.Column('type', notification_type_enum, nullable=False),
        sa.Column('reference_type', sa.String(50), nullable=False),
        sa.Column('reference_id', sa.String(36), nullable=False),
        sa.Column('title', sa.String(200), nullable=False),
        sa.Column('message', sa.Text, nullable=True),
        sa.Column('is_read', sa.Boolean, server_default='0', nullable=False),
        sa.Column('created_at', sa.DateTime, server_default=sa.func.now(), nullable=False),
        sa.Column('read_at', sa.DateTime, nullable=True),
    )
    op.create_index('idx_notifications_user', 'pjctrl_notifications', ['user_id'])
    op.create_index('idx_notifications_user_unread', 'pjctrl_notifications', ['user_id', 'is_read'])
    op.create_index('idx_notifications_reference', 'pjctrl_notifications', ['reference_type', 'reference_id'])

    # Create pjctrl_blockers table
    op.create_table(
        'pjctrl_blockers',
        sa.Column('id', sa.String(36), primary_key=True),
        sa.Column('task_id', sa.String(36), sa.ForeignKey('pjctrl_tasks.id', ondelete='CASCADE'), nullable=False),
        sa.Column('reported_by', sa.String(36), sa.ForeignKey('pjctrl_users.id'), nullable=False),
        sa.Column('reason', sa.Text, nullable=False),
        sa.Column('resolved_by', sa.String(36), sa.ForeignKey('pjctrl_users.id'), nullable=True),
        sa.Column('resolution_note', sa.Text, nullable=True),
        sa.Column('created_at', sa.DateTime, server_default=sa.func.now(), nullable=False),
        sa.Column('resolved_at', sa.DateTime, nullable=True),
    )
    op.create_index('idx_blockers_task', 'pjctrl_blockers', ['task_id'])
    op.create_index('idx_blockers_reported_by', 'pjctrl_blockers', ['reported_by'])


def downgrade() -> None:
    op.drop_table('pjctrl_blockers')
    op.drop_table('pjctrl_notifications')
    op.drop_table('pjctrl_mentions')
    op.drop_table('pjctrl_comments')

    # Drop enum type
    notification_type_enum = sa.Enum(name='notification_type_enum')
    notification_type_enum.drop(op.get_bind(), checkfirst=True)