import * as yargs from "yargs";
import * as table from "./table";
import * as scanner from "./scanner";

export var help = "Counts the number of works in the given input";

export function args(argv)
{
    return argv
        .help("help")

        .default('fields', ['_basename', '_words:r'])
        .describe(
            'fields',
            'The dotted fields in the metadata to display, or _basename for ' +
            'the name of the file, or _words to count the number of words. ' +
            'Appending a `:r` at the end right-aligns the output.')

        .default('table-start', '')
        .default('table-end', '')
        .default('table-delimiter', ': ')
        .boolean('table-rule')
        .default('table-rule', false)
        .boolean('table-header')
        .default('table-header', false)

        .boolean('total')
        .alias('t', 'total')
        .describe(
            'total',
            'If provided, adds a special entry with a _basename of Totals ' +
            'that adds up all the words.')

        .boolean('separator')
        .alias('s', 'separator')
        .describe(
            'separator',
            'If provided, then the word counts will have comma separators ' +
            'for thousands.'
        )

        .alias('o', 'output')
        .default('output', '-')

        .demand(1)
        .argv;
}

export function run(argv)
{
    var files = argv._.splice(1);
    var data = scanner.scanFiles(argv, files);

    if (argv.total)
    {
        argv.fields[1] += "t";
    }

    if (argv.separator)
    {
        argv.fields[1] += "s";
    }

    table.render(argv, data);
}