"""Add game models: mtgonline_games, game_players, game_history

Revision ID: 006
Revises: 005
Create Date: 2026-01-05 00:00:00.000000

This migration creates tables for the Core Game Engine:
  - mtgonline_games: Active game sessions
  - game_players: Player associations with games
  - game_history: Historical game records

"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa

# revision identifiers, used by Alembic.
revision: str = '006'
down_revision: Union[str, None] = '005'
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    """Create game engine tables."""

    # ------------------------------------------------------------------
    # 1. MTG Online Games Table  (mtgonline_games)
    #    Mirrors: app/models/models.py – class MTGOnlineGame
    # ------------------------------------------------------------------
    op.create_table(
        'mtgonline_games',
        sa.Column('id', sa.Integer(), primary_key=True, index=True),
        sa.Column('room_id', sa.Integer(),
                  sa.ForeignKey('mtgonline_rooms.id'),
                  nullable=False, index=True),
        sa.Column('host_id', sa.Integer(),
                  sa.ForeignKey('mtgonline_users.id'),
                  nullable=False, index=True),
        sa.Column('game_type', sa.String(50), nullable=False,
                  server_default='Commander'),
        sa.Column('state', sa.String(20), nullable=False,
                  server_default='WAITING'),
        sa.Column('is_password_protected', sa.Boolean(),
                  nullable=False, server_default='false'),
        sa.Column('max_players', sa.Integer(), nullable=False,
                  server_default='4'),
        sa.Column('current_players', sa.Integer(), nullable=False,
                  server_default='0'),
        sa.Column('created_at', sa.DateTime(),
                  server_default=sa.func.now()),
        sa.Column('started_at', sa.DateTime(), nullable=True),
        sa.Column('finished_at', sa.DateTime(), nullable=True),
    )

    # ------------------------------------------------------------------
    # 2. Game Players Table  (game_players)
    #    Mirrors: app/models/models.py – class GamePlayer
    # ------------------------------------------------------------------
    op.create_table(
        'game_players',
        sa.Column('id', sa.Integer(), primary_key=True, index=True),
        sa.Column('game_id', sa.Integer(),
                  sa.ForeignKey('mtgonline_games.id', ondelete='CASCADE'),
                  nullable=False, index=True),
        sa.Column('user_id', sa.Integer(),
                  sa.ForeignKey('mtgonline_users.id'),
                  nullable=False, index=True),
        sa.Column('seat_number', sa.Integer(), nullable=True),
        sa.Column('life_total', sa.Integer(), nullable=False,
                  server_default='20'),
        sa.Column('is_ready', sa.Boolean(), nullable=False,
                  server_default='false'),
        sa.Column('is_host', sa.Boolean(), nullable=False,
                  server_default='false'),
        sa.Column('joined_at', sa.DateTime(),
                  server_default=sa.func.now()),
    )
    # Unique constraint + indexes
    op.create_unique_constraint(
        'uq_game_player_unique', 'game_players',
        ['game_id', 'user_id'])
    op.create_index('idx_game_players_game', 'game_players', ['game_id'])
    op.create_index('idx_game_players_user', 'game_players', ['user_id'])

    # ------------------------------------------------------------------
    # 3. Game History Table  (game_history)
    #    Mirrors: app/models/models.py – class GameHistory
    # ------------------------------------------------------------------
    op.create_table(
        'game_history',
        sa.Column('id', sa.Integer(), primary_key=True, index=True),
        sa.Column('game_id', sa.Integer(),
                  sa.ForeignKey('mtgonline_games.id'),
                  nullable=True),
        sa.Column('room_id', sa.Integer(),
                  sa.ForeignKey('mtgonline_rooms.id'),
                  nullable=True, index=True),
        sa.Column('game_type', sa.String(50), nullable=False,
                  server_default='Commander'),
        sa.Column('winner_id', sa.Integer(),
                  sa.ForeignKey('mtgonline_users.id'),
                  nullable=True, index=True),
        sa.Column('duration_seconds', sa.Integer(), nullable=True),
        sa.Column('result_type', sa.String(50), nullable=True),
        sa.Column('replay_data', sa.JSON(), nullable=True),
        sa.Column('created_at', sa.DateTime(),
                  server_default=sa.func.now()),
    )


def downgrade() -> None:
    """Drop game engine tables in reverse dependency order."""
    op.drop_table('game_history')
    op.drop_table('game_players')
    op.drop_table('mtgonline_games')