package main

import (
	"strconv"
	"strings"
	"time"

	"github.com/drhodes/golorem"
)

// zs var <filename> -- returns list of variables and their values
// zs var <filename> <var...> -- returns list of variable values
func Var(args []string) string {
	if len(args) == 0 {
		return "var: filename expected"
	} else {
		s := ""
		if vars, _, err := md(args[0], globals()); err != nil {
			return "var: " + err.Error()
		} else {
			if len(args) > 1 {
				for _, a := range args[1:] {
					s = s + vars[a] + "\n"
				}
			} else {
				for k, v := range vars {
					s = s + k + ":" + v + "\n"
				}
			}
		}
		return strings.TrimSpace(s)
	}
}

// zs lorem <n> -- returns <n> random lorem ipsum sentences
func Lorem(args []string) string {
	if len(args) > 1 {
		return "lorem: invalid usage"
	}
	if len(args) == 0 {
		return lorem.Paragraph(5, 5)
	}
	if n, err := strconv.Atoi(args[0]); err == nil {
		return lorem.Paragraph(n, n)
	} else {
		return "lorem: " + err.Error()
	}
}

// zs datefmt <fmt> <date> -- returns formatted date from unix time
func DateFmt(args []string) string {
	if len(args) == 0 || len(args) > 2 {
		return "datefmt: invalid usage"
	}
	if n, err := strconv.ParseInt(args[1], 10, 64); err == nil {
		return time.Unix(n, 0).Format(args[0])
	} else {
		return "datefmt: " + err.Error()
	}
}

// zs dateparse <fmt> <date> -- returns unix time from the formatted date
func DateParse(args []string) string {
	if len(args) == 0 || len(args) > 2 {
		return "dateparse: invalid usage"
	}
	if d, err := time.Parse(args[0], args[1]); err != nil {
		return "dateparse: " + err.Error()
	} else {
		return strconv.FormatInt(d.Unix(), 10)
	}
}