package cli

import (
	"reflect"
	"testing"
)

func Test_SettingFlags(t *testing.T) {
	msg := ""
	app := NewApp()
	app.Flags = []Flag{
		StringFlag{"foo", "default", "a string flag"},
		IntFlag{"bar", 42, "an int flag"},
		BoolFlag{"bat", "a bool flag"},
	}
	app.Action = func(c *Context) {
		expect(t, c.String("foo"), "hello world")
		expect(t, c.Int("bar"), 245)
		expect(t, c.Bool("bat"), true)
		msg = "foobar"
	}
	app.Run([]string{"command", "--foo", "hello world", "--bar", "245", "--bat"})
	expect(t, msg, "foobar")
}

func Test_FlagDefaults(t *testing.T) {
	msg := ""
	app := NewApp()
	app.Flags = []Flag{
		StringFlag{"foo", "default", "a string flag"},
		IntFlag{"bar", 42, "an int flag"},
		BoolFlag{"bat", "a bool flag"},
	}
	app.Action = func(c *Context) {
		expect(t, c.String("foo"), "default")
		expect(t, c.Int("bar"), 42)
		expect(t, c.Bool("bat"), false)
		msg = "foobar"
	}
	app.Run([]string{"command"})
	expect(t, msg, "foobar")
}

func TestCommands(t *testing.T) {
	app := NewApp()
	app.Flags = []Flag{
		StringFlag{"name", "jeremy", "a name to print"},
	}
	app.Commands = []Command{
		{
			Name: "print",
			Flags: []Flag{
				IntFlag{"age", 50, "the age of the person"},
			},
			Action: func(c *Context) {
				expect(t, c.GlobalString("name"), "jordie")
				expect(t, c.Int("age"), 21)
			},
		},
	}
	app.Action = func(c *Context) {
		t.Error("default action should not be called")
	}
	app.Run([]string{"command", "--name", "jordie", "print", "--age", "21"})
}

/* Test Helpers */
func expect(t *testing.T, a interface{}, b interface{}) {
	if a != b {
		t.Errorf("Expected %v (type %v) - Got %v (type %v)", b, reflect.TypeOf(b), a, reflect.TypeOf(a))
	}
}

func refute(t *testing.T, a interface{}, b interface{}) {
	if a == b {
		t.Errorf("Did not expect %v (type %v) - Got %v (type %v)", b, reflect.TypeOf(b), a, reflect.TypeOf(a))
	}
}