use sea_orm_migration::prelude::*;

#[derive(DeriveMigrationName)]
pub struct Migration;

#[async_trait::async_trait]
impl MigrationTrait for Migration {
    async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
        let sql = include_str!("sql/m20260509_000004_add_message_versioning.sql");
        super::execute_sql(manager, sql).await
    }

    async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr> {
        manager
            .get_connection()
            .execute_raw(sea_orm::Statement::from_string(
                sea_orm::DbBackend::Postgres,
                "DROP INDEX IF EXISTS idx_ai_msg_version_latest; DROP INDEX IF EXISTS idx_ai_msg_version_group; ALTER TABLE ai_message DROP COLUMN IF EXISTS is_latest; ALTER TABLE ai_message DROP COLUMN IF EXISTS version_number; ALTER TABLE ai_message DROP COLUMN IF EXISTS version_group_id;"
                    .to_string(),
            ))
            .await?;
        Ok(())
    }
}