//
// Copyright (c) 2020-2021 science+computing ag and other contributors
//
// This program and the accompanying materials are made
// available under the terms of the Eclipse Public License 2.0
// which is available at https://www.eclipse.org/legal/epl-2.0/
//
// SPDX-License-Identifier: EPL-2.0
//

use anyhow::Result;
use clap::ArgMatches;
use log::trace;
use resiter::Filter;
use resiter::Map;

use crate::commands::util::getbool;
use crate::config::*;
use crate::package::PackageName;
use crate::repository::Repository;

/// Implementation of the "what_depends" subcommand
pub async fn what_depends(
    matches: &ArgMatches,
    config: &Configuration,
    repo: Repository,
) -> Result<()> {
    use filters::failable::filter::FailableFilter;

    let print_runtime_deps = getbool(
        matches,
        "dependency_type",
        crate::cli::IDENT_DEPENDENCY_TYPE_RUNTIME,
    );
    let print_build_deps = getbool(
        matches,
        "dependency_type",
        crate::cli::IDENT_DEPENDENCY_TYPE_BUILD,
    );

    let package_filter = {
        let name = matches
            .value_of("package_name")
            .map(String::from)
            .map(PackageName::from)
            .unwrap();

        crate::util::filters::build_package_filter_by_dependency_name(
            &name,
            print_build_deps,
            print_runtime_deps,
        )
    };

    let format = config.package_print_format();
    let mut stdout = std::io::stdout();

    let packages = repo
        .packages()
        .map(|package| package_filter.filter(package).map(|b| (b, package)))
        .filter_ok(|(b, _)| *b)
        .map_ok(|tpl| tpl.1)
        .inspect(|pkg| trace!("Found package: {:?}", pkg))
        .collect::<Result<Vec<_>>>()?;

    let flags = crate::ui::PackagePrintFlags {
        print_all: false,
        print_runtime_deps,
        print_build_deps,
        print_sources: false,
        print_dependencies: true,
        print_patches: false,
        print_env: false,
        print_flags: false,
        print_allowed_images: false,
        print_denied_images: false,
        print_phases: false,
        print_script: false,
        script_line_numbers: false,
        script_highlighting: false,
    };

    crate::ui::print_packages(&mut stdout, format, packages.into_iter(), config, &flags)
}