rsconstruct 0.9.83

use crate::common::{run_rsconstruct, run_rsconstruct_with_env, setup_test_project};
use std::fs;

#[test]
fn explain_first_build() {
    let temp_dir = setup_test_project();
    let project_path = temp_dir.path();

    fs::write(
        project_path.join("tera.templates/explain_first.txt.tera"),
        "hello",
    )
    .unwrap();

    let output =
        run_rsconstruct_with_env(project_path, &["build", "--explain"], &[("NO_COLOR", "1")]);
    assert!(
        output.status.success(),
        "build failed: {}",
        String::from_utf8_lossy(&output.stderr)
    );
    let stdout = String::from_utf8_lossy(&output.stdout);
    assert!(
        stdout.contains("BUILD"),
        "Expected BUILD in explain output, got: {}",
        stdout
    );
    assert!(
        stdout.contains("no cache entry"),
        "Expected 'no cache entry' reason, got: {}",
        stdout
    );
}

#[test]
fn explain_incremental_skip() {
    let temp_dir = setup_test_project();
    let project_path = temp_dir.path();

    fs::write(
        project_path.join("tera.templates/explain_skip.txt.tera"),
        "hello",
    )
    .unwrap();

    // First build
    let output = run_rsconstruct(project_path, &["build"]);
    assert!(output.status.success());

    // Second build with explain
    let output =
        run_rsconstruct_with_env(project_path, &["build", "--explain"], &[("NO_COLOR", "1")]);
    assert!(output.status.success());
    let stdout = String::from_utf8_lossy(&output.stdout);
    assert!(
        stdout.contains("SKIP"),
        "Expected SKIP in explain output, got: {}",
        stdout
    );
    assert!(
        stdout.contains("inputs unchanged"),
        "Expected 'inputs unchanged' reason, got: {}",
        stdout
    );
}

#[test]
fn explain_input_change() {
    let temp_dir = setup_test_project();
    let project_path = temp_dir.path();

    fs::write(
        project_path.join("tera.templates/explain_change.txt.tera"),
        "hello",
    )
    .unwrap();

    // First build
    let output = run_rsconstruct(project_path, &["build"]);
    assert!(output.status.success());

    // Modify the input
    std::thread::sleep(std::time::Duration::from_millis(100));
    fs::write(
        project_path.join("tera.templates/explain_change.txt.tera"),
        "changed",
    )
    .unwrap();

    // Second build with explain
    let output =
        run_rsconstruct_with_env(project_path, &["build", "--explain"], &[("NO_COLOR", "1")]);
    assert!(output.status.success());
    let stdout = String::from_utf8_lossy(&output.stdout);
    assert!(
        stdout.contains("BUILD"),
        "Expected BUILD in explain output, got: {}",
        stdout
    );
    assert!(
        stdout.contains("no cache entry"),
        "Expected 'no cache entry' reason (inputs changed = new key), got: {}",
        stdout
    );
}

#[test]
fn explain_force() {
    let temp_dir = setup_test_project();
    let project_path = temp_dir.path();

    fs::write(
        project_path.join("tera.templates/explain_force.txt.tera"),
        "hello",
    )
    .unwrap();

    // First build
    let output = run_rsconstruct(project_path, &["build"]);
    assert!(output.status.success());

    // Force build with explain
    let output = run_rsconstruct_with_env(
        project_path,
        &["build", "--force", "--explain"],
        &[("NO_COLOR", "1")],
    );
    assert!(output.status.success());
    let stdout = String::from_utf8_lossy(&output.stdout);
    assert!(
        stdout.contains("BUILD"),
        "Expected BUILD in explain output, got: {}",
        stdout
    );
    assert!(
        stdout.contains("forced"),
        "Expected 'forced' reason, got: {}",
        stdout
    );
}

#[test]
fn explain_after_clean() {
    let temp_dir = setup_test_project();
    let project_path = temp_dir.path();

    // Use tera processor which is a generator (produces output files)
    fs::write(
        project_path.join("tera.templates/explain_clean.txt.tera"),
        "hello",
    )
    .unwrap();

    // First build
    let output = run_rsconstruct(project_path, &["build"]);
    assert!(output.status.success());

    // Clean outputs
    let output = run_rsconstruct(project_path, &["clean", "outputs"]);
    assert!(output.status.success());

    // Build with explain — should show RESTORE
    let output =
        run_rsconstruct_with_env(project_path, &["build", "--explain"], &[("NO_COLOR", "1")]);
    assert!(output.status.success());
    let stdout = String::from_utf8_lossy(&output.stdout);
    assert!(
        stdout.contains("RESTORE"),
        "Expected RESTORE in explain output, got: {}",
        stdout
    );
    assert!(
        stdout.contains("output missing"),
        "Expected 'output missing' reason, got: {}",
        stdout
    );
}

#[test]
fn explain_dry_run() {
    let temp_dir = setup_test_project();
    let project_path = temp_dir.path();

    fs::write(
        project_path.join("tera.templates/explain_dry.txt.tera"),
        "hello",
    )
    .unwrap();

    // Dry run with explain on first build
    let output = run_rsconstruct_with_env(
        project_path,
        &["build", "--dry-run", "--explain"],
        &[("NO_COLOR", "1")],
    );
    assert!(output.status.success());
    let stdout = String::from_utf8_lossy(&output.stdout);
    assert!(
        stdout.contains("BUILD"),
        "Expected BUILD in explain dry-run output, got: {}",
        stdout
    );
    assert!(
        stdout.contains("no cache entry"),
        "Expected 'no cache entry' reason in dry-run, got: {}",
        stdout
    );
}