"""Initial migration

Revision ID: 001
Revises:
Create Date: 2025-12-18

"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa
from sqlalchemy.dialects import postgresql

# revision identifiers, used by Alembic.
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:
    # Create vehicles table
    op.create_table(
        'vehicles',
        sa.Column('id', sa.Integer(), nullable=False),
        sa.Column('name', sa.String(100), nullable=False),
        sa.Column('type', sa.String(50), nullable=True, default='car'),
        sa.Column('created_at', sa.DateTime(), nullable=True),
        sa.PrimaryKeyConstraint('id')
    )

    # Create positions table
    op.create_table(
        'positions',
        sa.Column('id', sa.Integer(), nullable=False),
        sa.Column('vehicle_id', sa.Integer(), nullable=False),
        sa.Column('timestamp', sa.DateTime(), nullable=False),
        sa.Column('lat', sa.Float(), nullable=False),
        sa.Column('lon', sa.Float(), nullable=False),
        sa.Column('speed', sa.Float(), nullable=True, default=0.0),
        sa.Column('heading', sa.Float(), nullable=True, default=0.0),
        sa.ForeignKeyConstraint(['vehicle_id'], ['vehicles.id'], ondelete='CASCADE'),
        sa.PrimaryKeyConstraint('id')
    )
    op.create_index('idx_positions_vehicle_ts', 'positions', ['vehicle_id', 'timestamp'])

    # Create events table
    op.create_table(
        'events',
        sa.Column('id', sa.Integer(), nullable=False),
        sa.Column('vehicle_id', sa.Integer(), nullable=False),
        sa.Column('timestamp', sa.DateTime(), nullable=False),
        sa.Column('type', sa.String(50), nullable=False),
        sa.Column('payload', postgresql.JSONB(), nullable=True, default={}),
        sa.ForeignKeyConstraint(['vehicle_id'], ['vehicles.id'], ondelete='CASCADE'),
        sa.PrimaryKeyConstraint('id')
    )
    op.create_index('idx_events_vehicle_ts', 'events', ['vehicle_id', 'timestamp'])
    op.create_index('idx_events_type', 'events', ['type'])

    # Insert demo vehicles
    op.execute("""
        INSERT INTO vehicles (name, type, created_at) VALUES
        ('Автобус А-101', 'bus', NOW()),
        ('Автобус А-102', 'bus', NOW()),
        ('Грузовик Г-201', 'truck', NOW()),
        ('Легковой Л-301', 'car', NOW()),
        ('Легковой Л-302', 'car', NOW())
    """)


def downgrade() -> None:
    op.drop_table('events')
    op.drop_table('positions')
    op.drop_table('vehicles')