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/// \file cli/cmd_report.hpp
/// Provides the cmd_report class.

#if !defined(CLI_CMD_REPORT_HPP)
#define CLI_CMD_REPORT_HPP

#include <fstream>
#include <memory>

#include "cli/common.hpp"
#include "utils/cmdline/options.hpp"
#include "utils/cmdline/ui.hpp"
#include "utils/fs/path.hpp"
#include "utils/noncopyable.hpp"

namespace cli {


/// Wrapper class to send messages through the UI or to a file.
///
/// The cmdline::ui object provides methods to write messages to stdout and
/// stderr.  We are interested in using these methods when dumping a report to
/// any of these channels, because this provides us proper logging among other
/// goodies during testing.  However, these are unsuitable to write the output
/// to an arbitrary file, which is a necessity for reports.
///
/// Therefore, this class provides a mechanism to write stdout and stderr
/// messages through the cmdline::ui object if the user so wishes, but otherwise
/// prints messages to the user selected file.
class file_writer : utils::noncopyable {
    /// The UI object to write stdout and stderr messages through.
    utils::cmdline::ui* const _ui;

    /// The path to the output file.
    const utils::fs::path _output_path;

    /// The output file, if not stdout nor stderr.
    std::auto_ptr< std::ofstream > _output_file;

    /// Constant that represents the path to stdout.
    static const utils::fs::path _stdout_path;

    /// Constant that represents the path to stderr.
    static const utils::fs::path _stderr_path;

public:
    file_writer(utils::cmdline::ui* const, const utils::fs::path&);
    ~file_writer(void);

    void operator()(const std::string&);
};


/// Implementation of the "report" subcommand.
class cmd_report : public cli_command
{
public:
    cmd_report(void);

    int run(utils::cmdline::ui*, const utils::cmdline::parsed_cmdline&,
            const utils::config::tree&);
};


}  // namespace cli


#endif  // !defined(CLI_CMD_REPORT_HPP)