use chrono::NaiveDate;
use fidc_core::{CnSmallCapRotationConfig, CnSmallCapRotationStrategy, DataSet, Strategy, StrategyContext, PortfolioState};
use std::path::PathBuf;

#[test]
fn strategy_emits_target_weights_and_diagnostics() {
    let data_dir = PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("../../data/demo");
    let data = DataSet::from_csv_dir(&data_dir).expect("demo data");
    let decision_date = NaiveDate::from_ymd_opt(2024, 1, 10).unwrap();
    let execution_date = NaiveDate::from_ymd_opt(2024, 1, 11).unwrap();
    let portfolio = PortfolioState::new(1_000_000.0);
    let mut cfg = CnSmallCapRotationConfig::demo();
    cfg.base_index_level = 3000.0;
    cfg.base_cap_floor = 38.0;
    cfg.cap_span = 25.0;
    let mut strategy = CnSmallCapRotationStrategy::new(cfg);

    let decision = strategy
        .on_day(&StrategyContext {
            execution_date,
            decision_date,
            decision_index: 0,
            data: &data,
            portfolio: &portfolio,
        })
        .expect("decision");

    assert!(decision.rebalance);
    assert!(!decision.target_weights.is_empty());
    assert!(decision
        .diagnostics
        .iter()
        .any(|line| line.contains("selected=")));
}