gemini-rust 2.0.0

use display_error_chain::DisplayErrorChain;
use gemini_rust::prelude::*;
use serde_json::json;
use std::process::ExitCode;
use tracing::info;

#[tokio::main]
async fn main() -> ExitCode {
    tracing_subscriber::fmt()
        .with_env_filter(
            tracing_subscriber::EnvFilter::builder()
                .with_default_directive(tracing::level_filters::LevelFilter::INFO.into())
                .from_env_lossy(),
        )
        .init();

    match do_main().await {
        Ok(()) => ExitCode::SUCCESS,
        Err(e) => {
            let error_chain = DisplayErrorChain::new(e.as_ref());
            tracing::error!(error.debug = ?e, error.chained = %error_chain, "execution failed");
            ExitCode::FAILURE
        }
    }
}

async fn do_main() -> Result<(), Box<dyn std::error::Error>> {
    let api_key =
        std::env::var("GEMINI_API_KEY").expect("GEMINI_API_KEY environment variable not set");
    let client = Gemini::new(api_key)?;

    info!("structured output example starting");

    let schema = json!({
        "type": "object",
        "properties": {
            "recipe_name": { "type": "string" },
            "ingredients": {
                "type": "array",
                "items": { "type": "string" }
            },
            "prep_time_minutes": { "type": "integer" }
        },
        "required": ["recipe_name", "ingredients"]
    });

    let interaction = client
        .create_interaction()
        .with_model("gemini-flash-latest")
        .with_text("Give me a recipe for banana bread")
        .with_json_schema(schema)
        .execute()
        .await?;

    let recipe: serde_json::Value = serde_json::from_str(&interaction.output_text())?;
    info!(recipe = %recipe, "parsed JSON recipe");

    info!("structured output example completed");
    Ok(())
}