#!/usr/bin/env node

const version = require('./version')

const args = process.argv

function help()
{
    console.log('\nUsage: json-bump FILENAME [FLAGS]')
    console.log('Bumps the version in a json file using semver (MAJOR.MINOR.PATCH)\n')
    console.log('  --replace=semver   this replaces the entire semver with the given string\n')
    console.log('  --major=1          increment the major version (increments by 1 if not specified)')
    console.log('  --minor=1          increment the minor version (increments by 1 if not specified)')
    console.log('  --patch=1          increment the patch version (increments by 1 if not specified)')
    console.log('  --entry=name       change entry updated (defaults is "version")\n')
    console.log('  --spaces=4         number of spaces to format the .json file (set to 0 to remove spaces)')
    console.log('If no flags are specified, increments PATCH by 1\n')
}

if (args.length < 3)
{
    help()
    process.exit(1)
}

let filename, flags = {}

for (let i = 2; i < args.length; i++)
{
    const arg = args[i]
    if (arg.substr(0, 2) === '--')
    {
        let value = arg.substr(2)
        if (value.indexOf('=') !== -1)
        {
            const split = value.split('=')
            flags[split[0].toLowerCase] = split[1]
        }
        else
        {
            value = value.toLowerCase()
            if (value === 'major' || value === 'minor' || value == 'patch')
            {
                flags[value] = 1
            }
            else
            {
                console.error('ERROR: Unknown arg: ' + arg)
                process.exit(2)
            }
        }
    }
    else
    {
        if (!filename)
        {
            filename = arg
        }
        else
        {
            console.error('ERROR: Unknown arg: ' + arg)
            process.exit(2)
        }
    }
}

const results = version(filename, { entry: flags['entry'], replace: flags['replace'], major: flags['major'], minor: flags['minor'], patch: flags['patch'] })

console.log('Updated ' + filename + ' version from ' + results.original + ' to ' + results.updated)