mod fixtures;

use fixtures::{server, Error, TestServer, DIRECTORIES, FILES};
use rstest::rstest;
use select::predicate::Attr;
use select::{document::Document, node::Node};
use std::fs::{remove_file, File};
use std::io::Write;
use std::path::PathBuf;

fn write_readme_contents(path: PathBuf, filename: &str) -> PathBuf {
    let readme_path = path.join(filename);
    let mut readme_file = File::create(&readme_path).unwrap();
    readme_file
        .write_all(format!("Contents of {filename}").as_bytes())
        .expect("Couldn't write readme");
    readme_path
}

fn assert_readme_contents(parsed_dom: &Document, filename: &str) {
    assert!(parsed_dom.find(Attr("id", "readme")).next().is_some());
    assert!(parsed_dom
        .find(Attr("id", "readme-filename"))
        .next()
        .is_some());
    assert!(
        parsed_dom
            .find(Attr("id", "readme-filename"))
            .next()
            .unwrap()
            .text()
            == filename
    );
    assert!(parsed_dom
        .find(Attr("id", "readme-contents"))
        .next()
        .is_some());
    assert!(parsed_dom
        .find(Attr("id", "readme-contents"))
        .next()
        .unwrap()
        .text()
        .trim()
        .contains(&format!("Contents of {filename}")));
}

/// Do not show readme contents by default
#[rstest]
fn no_readme_contents(server: TestServer) -> Result<(), Error> {
    let body = reqwest::blocking::get(server.url())?.error_for_status()?;
    let parsed = Document::from_read(body)?;

    // Check that the regular file listing still works.
    for &file in FILES {
        assert!(parsed.find(|x: &Node| x.text() == file).next().is_some());
    }
    for &dir in DIRECTORIES {
        assert!(parsed.find(|x: &Node| x.text() == dir).next().is_some());
    }

    // Check that there is no readme stuff here.
    assert!(parsed.find(Attr("id", "readme")).next().is_none());
    assert!(parsed.find(Attr("id", "readme-filename")).next().is_none());
    assert!(parsed.find(Attr("id", "readme-contents")).next().is_none());

    Ok(())
}

/// Show readme contents when told to if there is a readme file in the root
#[rstest(
    readme_name,
    case("Readme.md"),
    case("readme.md"),
    case("README.md"),
    case("README.MD"),
    case("ReAdMe.Md")
)]
fn show_root_readme_contents(
    #[with(&["--readme"])] server: TestServer,
    readme_name: &str,
) -> Result<(), Error> {
    let readme_path = write_readme_contents(server.path().to_path_buf(), readme_name);
    let body = reqwest::blocking::get(server.url())?.error_for_status()?;
    let parsed = Document::from_read(body)?;

    // All the files are still getting listed...
    for &file in FILES {
        assert!(parsed.find(|x: &Node| x.text() == file).next().is_some());
    }
    // ...in addition to the readme contents below the file listing.
    assert_readme_contents(&parsed, readme_name);
    remove_file(readme_path).unwrap();
    Ok(())
}

/// Show readme contents when told to if there is a readme file in any of the directories
#[rstest(
    readme_name,
    case("Readme.md"),
    case("readme.md"),
    case("README.md"),
    case("README.MD"),
    case("ReAdMe.Md"),
    case("Readme.txt"),
    case("README.txt"),
    case("README"),
    case("ReAdMe")
)]
fn show_nested_readme_contents(
    #[with(&["--readme"])] server: TestServer,
    readme_name: &str,
) -> Result<(), Error> {
    for dir in DIRECTORIES {
        let readme_path = write_readme_contents(server.path().join(dir), readme_name);
        let body = reqwest::blocking::get(server.url().join(dir)?)?.error_for_status()?;
        let parsed = Document::from_read(body)?;

        // All the files are still getting listed...
        for &file in FILES {
            assert!(parsed.find(|x: &Node| x.text() == file).next().is_some());
        }
        // ...in addition to the readme contents below the file listing.
        assert_readme_contents(&parsed, readme_name);
        remove_file(readme_path).unwrap();
    }
    Ok(())
}