//! Example: Query world resources from the database
//!
//! Run with: cargo run --example query_world_resources

use diesel::prelude::*;
use diesel::sqlite::SqliteConnection;
use std::env;

fn main() -> Result<(), Box<dyn std::error::Error>> {
    // Connect to database
    let database_url = env::var("DATABASE_URL").unwrap_or_else(|_| "../cursebreaker.db".to_string());
    let mut conn = SqliteConnection::establish(&database_url)?;

    // Use the schema
    use cursebreaker_parser::schema::world_resources::dsl::*;

    // Query all resources
    #[derive(Queryable, Debug)]
    struct WorldResource {
        item_id: i32,
        pos_x: f32,
        pos_y: f32,
    }

    let results = world_resources
        .limit(10)
        .load::<WorldResource>(&mut conn)?;

    println!("Found {} resources (showing first 10):", results.len());
    println!();

    for resource in results {
        println!("Resource:");
        println!("  Item ID: {}", resource.item_id);
        println!("  Position: ({:.2}, {:.2})", resource.pos_x, resource.pos_y);
        println!();
    }

    // Query all resources
    println!("\n--- All world resources ---");
    let all_results = world_resources
        .load::<WorldResource>(&mut conn)?;

    println!("Found {} total resources", all_results.len());

    // Group by item_id
    use std::collections::HashMap;
    let mut item_counts: HashMap<i32, usize> = HashMap::new();
    for resource in &all_results {
        *item_counts.entry(resource.item_id).or_insert(0) += 1;
    }

    println!("\nResource counts by item ID:");
    for (i_id, count) in item_counts {
        println!("  Item {}: {} instances", i_id, count);
    }

    Ok(())
}