"""初始数据库模式

Revision ID: 001
Revises:
Create Date: 2024-01-01 00:00:00

"""
from alembic import op
import sqlalchemy as sa
from sqlalchemy.dialects import mysql

# Alembic 使用的版本标识符
revision = '001'
down_revision = None
branch_labels = None
depends_on = None


def upgrade() -> None:
    # 创建 models 表
    op.create_table(
        'models',
        sa.Column('id', sa.Integer(), autoincrement=True, nullable=False),
        sa.Column('name', sa.String(length=128), nullable=False),
        sa.Column('type', sa.String(length=32), nullable=False),
        sa.Column('config', sa.JSON(), nullable=False),
        sa.Column('is_default', sa.Boolean(), nullable=True),
        sa.Column('status', sa.String(length=32), nullable=True),
        sa.Column('created_at', sa.DateTime(), nullable=True),
        sa.PrimaryKeyConstraint('id'),
        sa.UniqueConstraint('name')
    )
    op.create_index('idx_models_type', 'models', ['type'])
    op.create_index('idx_models_status', 'models', ['status'])

    # 创建 knowledge_bases 表
    op.create_table(
        'knowledge_bases',
        sa.Column('id', sa.Integer(), autoincrement=True, nullable=False),
        sa.Column('name', sa.String(length=128), nullable=False),
        sa.Column('description', sa.Text(), nullable=True),
        sa.Column('created_at', sa.DateTime(), nullable=True),
        sa.PrimaryKeyConstraint('id'),
        sa.UniqueConstraint('name')
    )

    # 创建 documents 表
    op.create_table(
        'documents',
        sa.Column('id', sa.BigInteger(), autoincrement=True, nullable=False),
        sa.Column('kb_id', sa.Integer(), nullable=False),
        sa.Column('title', sa.String(length=512), nullable=True),
        sa.Column('content', sa.Text(), nullable=False),
        sa.Column('source', sa.String(length=512), nullable=True),
        sa.Column('doc_metadata', sa.JSON(), nullable=True),
        sa.Column('embedding_id', sa.String(length=128), nullable=True),
        sa.Column('created_at', sa.DateTime(), nullable=True),
        sa.ForeignKeyConstraint(['kb_id'], ['knowledge_bases.id'], ),
        sa.PrimaryKeyConstraint('id')
    )
    op.create_index('idx_documents_kb_id', 'documents', ['kb_id'])

    # 创建 conversations 表
    op.create_table(
        'conversations',
        sa.Column('id', sa.BigInteger(), autoincrement=True, nullable=False),
        sa.Column('user_id', sa.Integer(), nullable=True),
        sa.Column('title', sa.String(length=255), nullable=True),
        sa.Column('created_at', sa.DateTime(), nullable=True),
        sa.PrimaryKeyConstraint('id')
    )

    # 创建 messages 表
    op.create_table(
        'messages',
        sa.Column('id', sa.BigInteger(), autoincrement=True, nullable=False),
        sa.Column('conversation_id', sa.BigInteger(), nullable=False),
        sa.Column('role', sa.String(length=32), nullable=False),
        sa.Column('content', sa.Text(), nullable=False),
        sa.Column('msg_metadata', sa.JSON(), nullable=True),
        sa.Column('created_at', sa.DateTime(), nullable=True),
        sa.ForeignKeyConstraint(['conversation_id'], ['conversations.id'], ),
        sa.PrimaryKeyConstraint('id')
    )
    op.create_index('idx_messages_conv_id', 'messages', ['conversation_id'])

    # 创建 tool_calls 表
    op.create_table(
        'tool_calls',
        sa.Column('id', sa.BigInteger(), autoincrement=True, nullable=False),
        sa.Column('agent_id', sa.String(length=128), nullable=False),
        sa.Column('tool_name', sa.String(length=128), nullable=False),
        sa.Column('call_input', sa.JSON(), nullable=True),
        sa.Column('call_output', sa.JSON(), nullable=True),
        sa.Column('created_at', sa.DateTime(), nullable=True),
        sa.PrimaryKeyConstraint('id')
    )
    op.create_index('idx_tool_calls_agent_id', 'tool_calls', ['agent_id'])


def downgrade() -> None:
    op.drop_index('idx_tool_calls_agent_id', table_name='tool_calls')
    op.drop_table('tool_calls')
    op.drop_index('idx_messages_conv_id', table_name='messages')
    op.drop_table('messages')
    op.drop_table('conversations')
    op.drop_index('idx_documents_kb_id', table_name='documents')
    op.drop_table('documents')
    op.drop_table('knowledge_bases')
    op.drop_index('idx_models_status', table_name='models')
    op.drop_index('idx_models_type', table_name='models')
    op.drop_table('models')