package cli_test

import (
	"fmt"
	"github.com/codegangsta/cli"
	"os"
	"testing"
)

func ExampleApp() {
	// set args for examples sake
	os.Args = []string{"greet", "--name", "Jeremy"}

	app := cli.NewApp()
	app.Name = "greet"
	app.Flags = []cli.Flag{
		cli.StringFlag{"name", "bob", "a name to say"},
	}
	app.Action = func(c *cli.Context) {
		fmt.Printf("Hello %v\n", c.String("name"))
	}
	app.Run(os.Args)
	// Output:
	// Hello Jeremy
}

func TestApp_Run(t *testing.T) {
	s := ""

	app := cli.NewApp()
	app.Action = func(c *cli.Context) {
		s = s + c.Args()[0]
	}

	app.Run([]string{"command", "foo"})
	app.Run([]string{"command", "bar"})
	expect(t, s, "foobar")
}

var commandAppTests = []struct {
	name     string
	expected bool
}{
	{"foobar", true},
	{"batbaz", true},
	{"b", true},
	{"f", true},
	{"bat", false},
	{"nothing", false},
}

func TestApp_Command(t *testing.T) {
	app := cli.NewApp()
	fooCommand := cli.Command{Name: "foobar", ShortName: "f"}
	batCommand := cli.Command{Name: "batbaz", ShortName: "b"}
	app.Commands = []cli.Command{
		fooCommand,
		batCommand,
	}

	for _, test := range commandAppTests {
		expect(t, app.Command(test.name) != nil, test.expected)
	}
}

func TestApp_CommandWithArgBeforeFlags(t *testing.T) {
	var parsedOption, firstArg string

	app := cli.NewApp()
	command := cli.Command{
		Name: "cmd",
		Flags: []cli.Flag{
			cli.StringFlag{"option", "", "some option"},
		},
		Action: func(c *cli.Context) {
			parsedOption = c.String("option")
			firstArg = c.Args()[0]
		},
	}
	app.Commands = []cli.Command{command}

	app.Run([]string{"", "cmd", "my-arg", "--option", "my-option"})

	expect(t, parsedOption, "my-option")
	expect(t, firstArg, "my-arg")
}