//! 外部视角 API 测试：验证 `ddddocr-tract2` 的公开类型与方法在外部 crate 中可正常使用。

use ddddocr_core::Resize;
use ddddocr_core::traits::{Info, Loader};
use ddddocr_core::types::AxisDim;
use ddddocr_tract2::loader::ModelLoader;
use ddddocr_tract2::{
    DetRuntime, ModelMetadata, Normalization, OcrBuilder, OcrRuntime, Session, SlideResult, Slider,
};
use std::path::{Path, PathBuf};

fn model_path(name: &str) -> PathBuf {
    Path::new(env!("CARGO_MANIFEST_DIR"))
        .join("..")
        .join("models")
        .join(name)
}

/// 验证对外导出的类型（含 `Session` 与 core 便捷重导出）均可直接命名。
#[test]
fn public_types_are_nameable() {
    let _: Option<Session> = None;
    let _: Option<OcrBuilder> = None;
    let _: Option<SlideResult> = None;
    let _slider = Slider::new();
}

/// 验证构建器链式 API 可组合使用，且返回的会话类型可显式标注。
#[test]
fn loader_chain_builds_session() -> anyhow::Result<()> {
    let path = model_path("common_sml2h3_f32.onnx");
    assert!(path.exists(), "缺少测试模型: {}", path.display());
    let _session: Session = ModelLoader::default().num_threads(4).build_for_path(path)?;
    Ok(())
}

/// 验证 `Info` trait 能从真实会话中解析输入/输出信息。
#[test]
fn info_trait_returns_model_metadata() -> anyhow::Result<()> {
    let path = model_path("common_sml2h3_f32.onnx");
    assert!(path.exists(), "缺少测试模型: {}", path.display());
    let session: Session = ModelLoader::default().build_for_path(path)?;
    let metadata = ModelMetadata::from_static_slice(
        &["a", "b"],
        false,
        Resize::DynamicWidth(64),
        1,
        Normalization::MinusOneToOne,
    );
    let ocr = OcrRuntime::new(session, metadata);

    let inputs = ocr.input_info()?;
    let outputs = ocr.output_info()?;
    assert!(!inputs.is_empty());
    assert!(!outputs.is_empty());
    assert!(matches!(inputs[0].shape[0], AxisDim::Static(1)));
    assert!(matches!(inputs[0].shape[2], AxisDim::Static(64)));

    let model_info = ocr.model_info()?;
    assert_eq!(model_info.inputs.len(), inputs.len());
    assert_eq!(model_info.outputs.len(), outputs.len());
    assert!(model_info.providers.is_none());
    Ok(())
}

/// 验证检测运行时可以从构建的会话创建。
#[test]
fn det_runtime_builds_from_session() -> anyhow::Result<()> {
    let path = model_path("common_det.onnx");
    assert!(path.exists(), "缺少测试模型: {}", path.display());
    let session: Session = ModelLoader::default().build_for_path(path)?;
    let _det = DetRuntime::new(session);
    Ok(())
}