use crate::template::Context;
use crate::utils::recursively_copy;
use std::io::Result;
use std::path::Path;

pub fn generate(source: &Path, _: &Path, target: &Path, _: &Context) -> Result<()> {
    if source.exists() {
        return recursively_copy(source, target);
    }
    Ok(())
}

#[cfg(test)]
mod tests {
    use std::collections::HashMap;
    use std::fs::create_dir_all;

    use super::*;

    use test_utilities::*;

    #[test]
    fn test_copies_files() {
        let test_dir = setup_test_dir();
        let static_dir = test_dir.join("static");
        let template_dir = test_dir.join("templates");
        let output_dir = test_dir.join("output");

        create_dir_all(&static_dir).expect("Could not create static directory");
        create_dir_all(&output_dir).expect("Could not create output directory");
        create_test_file(&static_dir.join("test.jpg"), "Cool hat");

        let context = HashMap::new();

        generate(&static_dir, &template_dir, &output_dir, &context).expect("Generate failed");

        assert_file_contents(&output_dir.join("test.jpg"), "Cool hat");
        cleanup_test_dir(&test_dir);
    }

    #[test]
    fn test_creates_directories_if_they_do_not_exist() {
        let test_dir = setup_test_dir();
        let static_dir = test_dir.join("static");
        let template_dir = test_dir.join("templates");
        let output_dir = test_dir.join("output");

        create_dir_all(&static_dir).expect("Could not create static directory");
        create_dir_all(static_dir.join("nested")).expect("Could not create output directory");
        create_test_file(&static_dir.join("nested/test.mov"), "Cool hats, multiple.");

        let context = HashMap::new();

        generate(&static_dir, &template_dir, &output_dir, &context).expect("Generate failed");

        assert_file_contents(&output_dir.join("nested/test.mov"), "Cool hats, multiple.");
        cleanup_test_dir(&test_dir);
    }

    #[test]
    fn test_it_does_not_fail_if_source_directory_does_not_exist() {
        let test_dir = setup_test_dir();
        let static_dir = test_dir.join("static");
        let template_dir = test_dir.join("templates");
        let output_dir = test_dir.join("output");

        let context = HashMap::new();

        let result = generate(&static_dir, &template_dir, &output_dir, &context);

        assert!(result.is_ok());
        cleanup_test_dir(&test_dir);
    }
}