// Copyright 2010 Google Inc.
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#include "cli/cmd_list.hpp"

#include <cstdlib>
#include <utility>
#include <vector>

#include "cli/common.ipp"
#include "engine/drivers/list_tests.hpp"
#include "engine/filters.hpp"
#include "engine/test_case.hpp"
#include "engine/test_program.hpp"
#include "utils/cmdline/options.hpp"
#include "utils/cmdline/parser.ipp"
#include "utils/cmdline/ui.hpp"
#include "utils/defs.hpp"
#include "utils/format/macros.hpp"
#include "utils/fs/path.hpp"

namespace cmdline = utils::cmdline;
namespace config = utils::config;
namespace fs = utils::fs;
namespace list_tests = engine::drivers::list_tests;


namespace {


/// Hooks for list_tests to print test cases as they come.
class progress_hooks : public list_tests::base_hooks {
    /// The ui object to which to print the test cases.
    cmdline::ui* _ui;

    /// Whether to print test case details or just their names.
    bool _verbose;

public:
    /// Initializes the hooks.
    ///
    /// \param ui_ The ui object to which to print the test cases.
    /// \param verbose_ Whether to print test case details or just their names.
    progress_hooks(cmdline::ui* ui_, const bool verbose_) :
        _ui(ui_),
        _verbose(verbose_)
    {
    }

    /// Reports a test case as soon as it is found.
    ///
    /// \param test_case The test case to report.
    void
    got_test_case(const engine::test_case& test_case)
    {
        cli::detail::list_test_case(_ui, _verbose, test_case);
    }
};


}  // anonymous namespace


/// Lists a single test case.
///
/// \param [out] ui Object to interact with the I/O of the program.
/// \param verbose Whether to be verbose or not.
/// \param test_case The test case to print.
void
cli::detail::list_test_case(cmdline::ui* ui, const bool verbose,
                            const engine::test_case& test_case)
{
    const std::string id = format_test_case_id(test_case);
    if (!verbose) {
        ui->out(id);
    } else {
        ui->out(F("%s (%s)") % id %
                test_case.container_test_program().test_suite_name());

        // TODO(jmmv): Running these for every test case is probably not the
        // fastest thing to do.
        const engine::metadata default_md = engine::metadata_builder().build();
        const engine::properties_map default_props = default_md.to_properties();

        const engine::metadata& test_md = test_case.get_metadata();
        const engine::properties_map test_props = test_md.to_properties();

        for (engine::properties_map::const_iterator iter = test_props.begin();
             iter != test_props.end(); iter++) {
            const engine::properties_map::const_iterator default_iter =
                default_props.find((*iter).first);
            if (default_iter == default_props.end() ||
                (*iter).second != (*default_iter).second)
                ui->out(F("    %s = %s") % (*iter).first % (*iter).second);
        }
    }
}


/// Default constructor for cmd_list.
cli::cmd_list::cmd_list(void) :
    cli_command("list", "[test-program ...]", 0, -1,
                "Lists test cases and their meta-data")
{
    add_option(build_root_option);
    add_option(kyuafile_option);
    add_option(cmdline::bool_option('v', "verbose", "Show properties"));
}


/// Entry point for the "list" subcommand.
///
/// \param ui Object to interact with the I/O of the program.
/// \param cmdline Representation of the command line to the subcommand.
/// \param unused_user_config The runtime configuration of the program.
///
/// \return 0 to indicate success.
int
cli::cmd_list::run(cmdline::ui* ui, const cmdline::parsed_cmdline& cmdline,
                   const config::tree& UTILS_UNUSED_PARAM(user_config))
{
    progress_hooks hooks(ui, cmdline.has_option("verbose"));
    const list_tests::result result = list_tests::drive(
        kyuafile_path(cmdline), build_root_path(cmdline),
        parse_filters(cmdline.arguments()), hooks);

    return report_unused_filters(result.unused_filters, ui) ?
        EXIT_FAILURE : EXIT_SUCCESS;
}