use crate::utils::*;

use anyhow::Result;
use predicates::prelude::*;

#[test]
fn fails_when_templates_arg_missing() -> Result<()> {
    let package = Package::builder().build()?;

    CargoAbout::new(&package)?
        .generate()
        .assert()
        .failure()
        .stderr(predicate::str::is_match(
            r"handlebars template\(s\) must be specified when using handlebars output format",
        )?);

    Ok(())
}

#[test]
fn fails_when_manifest_absent() -> Result<()> {
    let package = Package::builder().no_manifest().build()?;

    CargoAbout::new(&package)?
        .generate()
        .template(package.template()?)
        .assert()
        .failure()
        .stderr(predicate::str::is_match(
            r"cargo manifest path '.*' does not exist",
        )?);

    Ok(())
}

#[test]
fn fails_when_manifest_invalid() -> Result<()> {
    let package = Package::builder().file("Cargo.toml", "").build()?;

    CargoAbout::new(&package)?
        .generate()
        .template(package.template()?)
        .assert()
        .failure()
        .stderr(predicate::str::contains("failed to parse manifest"));

    Ok(())
}

#[test]
fn fails_back_to_default_about_config_when_absent() -> Result<()> {
    let package = Package::builder().no_about_config().build()?;

    CargoAbout::new(&package)?
        .generate()
        .template(package.template()?)
        .assert()
        .stderr(predicate::str::contains(
            "no 'about.toml' found, falling back to default configuration",
        ));

    Ok(())
}

#[test]
fn fails_when_template_file_missing() -> Result<()> {
    let package = Package::builder().no_template().build()?;

    CargoAbout::new(&package)?
        .generate()
        .template("non-existent-about.hbs")
        .assert()
        .failure()
        .stderr(predicate::str::contains(
            "template(s) path 'non-existent-about.hbs' does not exist",
        ));

    Ok(())
}

#[test]
fn reports_no_licenses_when_no_licenses() -> Result<()> {
    let package = Package::builder().build()?;

    CargoAbout::new(&package)?
        .generate()
        .template(package.template()?)
        .assert()
        .success()
        .stderr(unable_to_synthesize_license_expr_warning(&package))
        .stdout(overview_count(0))
        .stdout(licenses_count(0));

    Ok(())
}

#[test]
fn fails_when_missing_accepted_field() -> Result<()> {
    let package = Package::builder().file("about.toml", "").build()?;

    CargoAbout::new(&package)?
        .generate()
        .template(package.template()?)
        .assert()
        .failure()
        .stderr(predicates::str::contains("missing field `accepted`"));

    Ok(())
}

#[test]
fn reports_no_licenses_when_no_license_and_accepted_field_empty() -> Result<()> {
    let package = Package::builder().build()?;

    CargoAbout::new(&package)?
        .generate()
        .template(package.template()?)
        .assert()
        .success()
        .stderr(unable_to_synthesize_license_expr_warning(&package))
        .stdout(overview_count(0))
        .stdout(licenses_count(0));

    Ok(())
}

#[test]
fn fails_when_license_field_valid_and_accepted_field_empty() -> Result<()> {
    let package = Package::builder().license(Some("MIT")).build()?;

    CargoAbout::new(&package)?
        .generate()
        .template(package.template()?)
        .assert()
        .failure()
        .stderr(predicates::str::contains(
            "failed to satisfy license requirements",
        ))
        .stdout("");

    Ok(())
}

#[test]
fn reports_no_licenses_when_license_field_unknown() -> Result<()> {
    let package = Package::builder()
        .license(Some("MIT"))
        .accepted(&["MIT"])
        .license(Some("UNKNOWN"))
        .build()?;

    CargoAbout::new(&package)?
        .generate()
        .template(package.template()?)
        .assert()
        .success()
        .stderr(predicates::str::contains(
            "unable to parse license expression for 'package 0.0.0': UNKNOWN",
        ))
        .stdout(overview_count(0))
        .stdout(licenses_count(0));

    Ok(())
}

#[test]
fn reports_a_license_when_license_field_valid() -> Result<()> {
    let package = Package::builder()
        .license(Some("MIT"))
        .accepted(&["MIT"])
        .build()?;

    CargoAbout::new(&package)?
        .generate()
        .template(package.template()?)
        .assert()
        .success()
        .stderr("")
        .stdout(overview_count(1))
        .stdout(licenses_count(1))
        .stdout(contains_default_mit_license_content());

    Ok(())
}

// TODO: might be nice to let the user know that there was a license file field, but
// that the file was missing.
#[test]
fn reports_no_licenses_when_license_file_field_but_no_file() -> Result<()> {
    let package = Package::builder()
        .license_file("LICENSE", None)
        .accepted(&["MIT"])
        .build()?;

    CargoAbout::new(&package)?
        .generate()
        .template(package.template()?)
        .assert()
        .success()
        .stderr(unable_to_synthesize_license_expr_warning(&package))
        .stdout(overview_count(0))
        .stdout(licenses_count(0));

    Ok(())
}

// TODO: might be nice to let the user know that there was a license file field, but
// that the file was empty / unrecognizable.
#[test]
fn reports_no_licenses_when_license_file_field_but_file_empty() -> Result<()> {
    let package = Package::builder()
        .license_file("LICENSE", Some(""))
        .accepted(&["MIT"])
        .build()?;

    CargoAbout::new(&package)?
        .generate()
        .template(package.template()?)
        .assert()
        .success()
        .stderr(unable_to_synthesize_license_expr_warning(&package))
        .stdout(overview_count(0))
        .stdout(licenses_count(0));

    Ok(())
}

// TODO: This seems like incorrect behavior.... IMO the report should be generated
// and maybe custom and/or non-accepted licenses should be included with some
// additional metadata noting that it is not accepted..
#[test]
fn reports_no_licenses_when_manifest_has_license_file_field_with_non_spdx_text() -> Result<()> {
    let package = Package::builder()
        .license_file(
            "LICENSE",
            Some("Copyright (c) 2022 Big Birdz. No permissions granted ever."),
        )
        .build()?;

    CargoAbout::new(&package)?
        .generate()
        .template(package.template()?)
        .assert()
        .success()
        .stderr(unable_to_synthesize_license_expr_warning(&package))
        .stdout(overview_count(0))
        .stdout(licenses_count(0));

    Ok(())
}

#[test]
fn reports_custom_spdx_license_text_when_manifest_has_license_file_field_with_spdx_text(
) -> Result<()> {
    let license_text = mit_license_text("2022", "Big Birdz");

    let package = Package::builder()
        .license_file("LICENSE", Some(&license_text))
        .accepted(&["MIT"])
        .build()?;

    CargoAbout::new(&package)?
        .generate()
        .template(package.template()?)
        .assert()
        .success()
        // TODO: There should not be a warning about a missing licenses field
        // since the manifest does have a license file field and according to the
        // cargo docs, a manifest should have a license field or a license file
        // field but not both.
        .stderr(contains_missing_license_field_warning(&package))
        .stdout(overview_count(1))
        .stdout(licenses_count(1))
        .stdout(predicates::str::contains(&license_text));

    Ok(())
}

#[test]
fn reports_no_licenses_when_manifest_has_license_file_field_with_spdx_license_text_and_non_std_filename(
) -> Result<()> {
    let license_text = mit_license_text("2022", "Big Birdz");

    let package = Package::builder()
        .license_file("NON_STD_LICENSE_FILENAME", Some(&license_text))
        .accepted(&["MIT"])
        .build()?;

    CargoAbout::new(&package)?
        .generate()
        .template(package.template()?)
        .assert()
        .success()
        // TODO: There should not be a warning about a missing licenses field
        // since the manifest does have a license file field and according to the
        // cargo docs, a manifest should have a license field or a license file
        // field but not both.
        .stderr(contains_missing_license_field_warning(&package))
        // TODO: I would've expected this test case to succeed given that the
        // name of the license file is given in the manifest and it is clear
        // that the license can be detected from its text (which works when
        // the license file is named `LICENSE`).
        // I suppose I can understand if scanning all files in the repo would
        // make the tool annoyingly slow.
        .stderr(unable_to_synthesize_license_expr_warning(&package))
        .stdout(overview_count(0))
        .stdout(licenses_count(0));

    Ok(())
}

#[test]
fn reports_custom_spdx_license_file_when_spdx_license_file_has_std_naming_but_not_specifed_in_manifest(
) -> Result<()> {
    let license_content = mit_license_text("2022", "Big Birdz");

    let package = Package::builder()
        .license(Some("MIT"))
        .file("LICENSE", &license_content)
        .accepted(&["MIT"])
        .build()?;

    CargoAbout::new(&package)?
        .generate()
        .template(package.template()?)
        .assert()
        .success()
        .stderr("")
        .stdout(overview_count(1))
        .stdout(licenses_count(1))
        .stdout(predicates::str::contains(&license_content));

    Ok(())
}

#[test]
fn reports_one_license_when_when_dependency_has_same_spdx_license_and_text() -> Result<()> {
    let package_b = Package::builder()
        .name("package-b")
        .license(Some("MIT"))
        .build()?;

    let package_a = Package::builder()
        .name("package-a")
        .license(Some("MIT"))
        .accepted(&["MIT"])
        .dependency(&package_b)
        .build()?;

    CargoAbout::new(&package_a)?
        .generate()
        .template(package_a.template()?)
        .assert()
        .success()
        .stderr("")
        .stdout(overview_count(1))
        .stdout(licenses_count(1))
        .stdout(contains_default_mit_license_content());

    Ok(())
}

#[test]
fn reports_all_licenses_when_dependency_has_same_spdx_license_and_different_text() -> Result<()> {
    let package_b_license_text = mit_license_text("2022", "Package B Owner");
    let package_b = Package::builder()
        .license_file("LICENSE", Some(&package_b_license_text))
        .name("package-b")
        .build()?;

    let package_a_license_text = mit_license_text("2022", "Package A Owner");
    let package_a = Package::builder()
        .name("package-a")
        .license_file("LICENSE", Some(&package_a_license_text))
        .dependency(&package_b)
        .accepted(&["MIT"])
        .build()?;

    CargoAbout::new(&package_a)?
        .generate()
        .template(package_a.template()?)
        .assert()
        .success()
        .stdout(overview_count(1))
        .stdout(licenses_count(2))
        .stdout(predicates::str::contains(package_a_license_text))
        .stdout(predicates::str::contains(package_b_license_text));

    Ok(())
}

#[test]
fn reports_all_licenses_when_dependency_has_different_license_and_text() -> Result<()> {
    let package_b = Package::builder()
        .name("package-b")
        .license(Some("Apache-2.0"))
        .build()?;

    let package_a = Package::builder()
        .name("package-a")
        .license(Some("MIT"))
        .dependency(&package_b)
        .accepted(&["MIT", "Apache-2.0"])
        .build()?;

    CargoAbout::new(&package_a)?
        .generate()
        .template(package_a.template()?)
        .assert()
        .success()
        .stdout(overview_count(2))
        .stdout(licenses_count(2))
        .stdout(contains_default_mit_license_content())
        .stdout(contains_default_apache2_license_content());

    Ok(())
}

#[test]
fn fails_when_dependency_has_non_accepted_license_field() -> Result<()> {
    let mut package_builder = Package::builder();

    let package_b = package_builder
        .license(Some("Apache-2.0"))
        .name("package-b")
        .build()?;

    let package_a = package_builder
        .license(Some("MIT"))
        .name("package-a")
        .accepted(&["MIT"])
        .dependency(&package_b)
        .build()?;

    CargoAbout::new(&package_a)?
        .generate()
        .template(package_a.template()?)
        .assert()
        .failure()
        .stderr(predicates::str::contains(
            "encountered 1 errors resolving licenses, unable to generate output",
        ));

    Ok(())
}