// 用户设置表

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> {
        manager
            .create_table(
                Table::create()
                    .table(UserSettings::Table)
                    .if_not_exists()
                    .col(ColumnDef::new(UserSettings::Id).uuid().not_null().primary_key())
                    .col(ColumnDef::new(UserSettings::TenantId).uuid().not_null())
                    .col(ColumnDef::new(UserSettings::UserId).uuid().not_null())
                    .col(ColumnDef::new(UserSettings::Settings).json_binary().not_null())
                    .col(
                        ColumnDef::new(UserSettings::CreatedAt)
                            .timestamp_with_time_zone()
                            .not_null()
                            .default(Expr::current_timestamp()),
                    )
                    .col(
                        ColumnDef::new(UserSettings::UpdatedAt)
                            .timestamp_with_time_zone()
                            .not_null()
                            .default(Expr::current_timestamp()),
                    )
                    .col(ColumnDef::new(UserSettings::CreatedBy).uuid().not_null())
                    .col(ColumnDef::new(UserSettings::UpdatedBy).uuid().not_null())
                    .col(ColumnDef::new(UserSettings::DeletedAt).timestamp_with_time_zone().null())
                    .col(ColumnDef::new(UserSettings::Version).integer().not_null().default(1))
                    .to_owned(),
            )
            .await?;

        // 用户唯一索引（软删除安全，一个用户一条设置）
        manager.get_connection().execute(sea_orm::Statement::from_string(
            sea_orm::DatabaseBackend::Postgres,
            "CREATE UNIQUE INDEX idx_user_settings_user ON user_settings (user_id) WHERE deleted_at IS NULL".to_string(),
        )).await.map_err(|e| DbErr::Custom(e.to_string()))?;

        Ok(())
    }

    async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr> {
        manager
            .drop_table(Table::drop().table(UserSettings::Table).to_owned())
            .await
    }
}

#[derive(DeriveIden)]
enum UserSettings {
    Table,
    Id,
    TenantId,
    UserId,
    Settings,
    CreatedAt,
    UpdatedAt,
    CreatedBy,
    UpdatedBy,
    DeletedAt,
    Version,
}