"""Initial migration

Revision ID: 001
Revises:
Create Date: 2025-11-30

"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa


revision: str = '001'
down_revision: Union[str, None] = None
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    # Users table
    op.create_table(
        'users',
        sa.Column('id', sa.Integer(), primary_key=True),
        sa.Column('email', sa.String(255), nullable=False, unique=True, index=True),
        sa.Column('username', sa.String(100), nullable=False),
        sa.Column('password_hash', sa.String(255), nullable=False),
        sa.Column('role', sa.String(20), default='participant'),
        sa.Column('is_active', sa.Boolean(), default=True),
        sa.Column('created_at', sa.DateTime(), default=sa.func.now()),
    )

    # Contests table
    op.create_table(
        'contests',
        sa.Column('id', sa.Integer(), primary_key=True),
        sa.Column('title', sa.String(255), nullable=False),
        sa.Column('description', sa.Text(), nullable=True),
        sa.Column('start_time', sa.DateTime(), nullable=False),
        sa.Column('end_time', sa.DateTime(), nullable=False),
        sa.Column('is_active', sa.Boolean(), default=False),
        sa.Column('created_by', sa.Integer(), sa.ForeignKey('users.id'), nullable=True),
        sa.Column('created_at', sa.DateTime(), default=sa.func.now()),
    )

    # Problems table
    op.create_table(
        'problems',
        sa.Column('id', sa.Integer(), primary_key=True),
        sa.Column('contest_id', sa.Integer(), sa.ForeignKey('contests.id', ondelete='CASCADE'), nullable=False),
        sa.Column('title', sa.String(255), nullable=False),
        sa.Column('description', sa.Text(), nullable=False),
        sa.Column('input_format', sa.Text(), nullable=True),
        sa.Column('output_format', sa.Text(), nullable=True),
        sa.Column('constraints', sa.Text(), nullable=True),
        sa.Column('time_limit_ms', sa.Integer(), default=1000),
        sa.Column('memory_limit_kb', sa.Integer(), default=262144),
        sa.Column('total_points', sa.Integer(), default=100),
        sa.Column('order_index', sa.Integer(), default=0),
        sa.Column('created_at', sa.DateTime(), default=sa.func.now()),
    )

    # Test cases table
    op.create_table(
        'test_cases',
        sa.Column('id', sa.Integer(), primary_key=True),
        sa.Column('problem_id', sa.Integer(), sa.ForeignKey('problems.id', ondelete='CASCADE'), nullable=False),
        sa.Column('input', sa.Text(), nullable=False),
        sa.Column('expected_output', sa.Text(), nullable=False),
        sa.Column('is_sample', sa.Boolean(), default=False),
        sa.Column('points', sa.Integer(), default=0),
        sa.Column('order_index', sa.Integer(), default=0),
    )

    # Submissions table
    op.create_table(
        'submissions',
        sa.Column('id', sa.Integer(), primary_key=True),
        sa.Column('user_id', sa.Integer(), sa.ForeignKey('users.id'), nullable=False),
        sa.Column('problem_id', sa.Integer(), sa.ForeignKey('problems.id'), nullable=False),
        sa.Column('contest_id', sa.Integer(), sa.ForeignKey('contests.id'), nullable=False),
        sa.Column('source_code', sa.Text(), nullable=False),
        sa.Column('language_id', sa.Integer(), nullable=False),
        sa.Column('language_name', sa.String(50), nullable=True),
        sa.Column('status', sa.String(50), default='pending'),
        sa.Column('score', sa.Integer(), default=0),
        sa.Column('total_points', sa.Integer(), default=0),
        sa.Column('tests_passed', sa.Integer(), default=0),
        sa.Column('tests_total', sa.Integer(), default=0),
        sa.Column('execution_time_ms', sa.Integer(), nullable=True),
        sa.Column('memory_used_kb', sa.Integer(), nullable=True),
        sa.Column('judge_response', sa.JSON(), nullable=True),
        sa.Column('created_at', sa.DateTime(), default=sa.func.now()),
    )

    # Contest participants table
    op.create_table(
        'contest_participants',
        sa.Column('id', sa.Integer(), primary_key=True),
        sa.Column('contest_id', sa.Integer(), sa.ForeignKey('contests.id'), nullable=False),
        sa.Column('user_id', sa.Integer(), sa.ForeignKey('users.id'), nullable=False),
        sa.Column('joined_at', sa.DateTime(), default=sa.func.now()),
        sa.UniqueConstraint('contest_id', 'user_id', name='unique_contest_participant'),
    )


def downgrade() -> None:
    op.drop_table('contest_participants')
    op.drop_table('submissions')
    op.drop_table('test_cases')
    op.drop_table('problems')
    op.drop_table('contests')
    op.drop_table('users')