/*
 * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
 * SPDX-License-Identifier: Apache-2.0.
 */

use aws_config::meta::region::RegionProviderChain;
use aws_sdk_dynamodb::model::{
    AttributeDefinition, KeySchemaElement, KeyType, ProvisionedThroughput, ScalarAttributeType,
};
use aws_sdk_dynamodb::{Client, Error, Region, PKG_VERSION};

use structopt::StructOpt;

#[derive(Debug, StructOpt)]
struct Opt {
    /// The AWS Region.
    #[structopt(short, long)]
    region: Option<String>,

    /// Whether to display additional information.
    #[structopt(short, long)]
    verbose: bool,
}

/// Lists your DynamoDB tables and creates the table **test-table**.
/// # Arguments
///
/// * `[-r REGION]` - The region in which the client is created.
///    If not supplied, uses the value of the **AWS_REGION** environment variable.
///    If the environment variable is not set, defaults to **us-west-2**.
/// * `[-v]` - Whether to display additional information.
#[tokio::main]
async fn main() -> Result<(), Error> {
    tracing_subscriber::fmt::init();
    let Opt { region, verbose } = Opt::from_args();

    let region_provider = RegionProviderChain::first_try(region.map(Region::new))
        .or_default_provider()
        .or_else(Region::new("us-west-2"));
    let shared_config = aws_config::from_env().region(region_provider).load().await;

    if verbose {
        println!("DynamoDB client version: {}", PKG_VERSION);
        println!(
            "Region:                  {}",
            shared_config.region().unwrap()
        );
        println!();
    }

    let client = Client::new(&shared_config);

    let tables = client.list_tables().send().await?;

    println!("Current DynamoDB tables: {:?}", tables);

    let new_table = client
        .create_table()
        .table_name("test-table")
        .key_schema(
            KeySchemaElement::builder()
                .attribute_name("k")
                .key_type(KeyType::Hash)
                .build(),
        )
        .attribute_definitions(
            AttributeDefinition::builder()
                .attribute_name("k")
                .attribute_type(ScalarAttributeType::S)
                .build(),
        )
        .provisioned_throughput(
            ProvisionedThroughput::builder()
                .write_capacity_units(10)
                .read_capacity_units(10)
                .build(),
        )
        .send()
        .await?;
    println!(
        "new table: {:#?}",
        &new_table.table_description.unwrap().table_arn.unwrap()
    );

    Ok(())
}
