package irc

import (
	"testing"

	"github.com/stretchr/testify/assert"
)

func TestParseMessage(t *testing.T) {
	cases := []struct {
		input    string
		expected *Message
	}{
		{
			":user CMD #chan :some message\r\n",
			&Message{
				Prefix:  "user",
				Nick:    "user",
				Command: "CMD",
				Params:  []string{"#chan", "some message"},
			},
		}, {
			":nick!user@host.com CMD a b\r\n",
			&Message{
				Prefix:  "nick!user@host.com",
				Nick:    "nick",
				Command: "CMD",
				Params:  []string{"a", "b"},
			},
		}, {
			"CMD a b :\r\n",
			&Message{
				Command: "CMD",
				Params:  []string{"a", "b", ""},
			},
		}, {
			"CMD a b\r\n",
			&Message{
				Command: "CMD",
				Params:  []string{"a", "b"},
			},
		}, {
			"CMD\r\n",
			&Message{
				Command: "CMD",
			},
		}, {
			"CMD :tests and stuff\r\n",
			&Message{
				Command: "CMD",
				Params:  []string{"tests and stuff"},
			},
		}, {
			":nick@host.com CMD\r\n",
			&Message{
				Prefix:  "nick@host.com",
				Nick:    "nick",
				Command: "CMD",
			},
		}, {
			":ni@ck!user!name@host!.com CMD\r\n",
			&Message{
				Prefix:  "ni@ck!user!name@host!.com",
				Nick:    "ni@ck",
				Command: "CMD",
			},
		},
	}

	for _, tc := range cases {
		assert.Equal(t, tc.expected, parseMessage(tc.input))
	}
}

func TestLastParam(t *testing.T) {
	assert.Equal(t, "some message", parseMessage(":user CMD #chan :some message\r\n").LastParam())
	assert.Equal(t, "", parseMessage("NO_PARAMS").LastParam())
}

func TestBadMessagePanic(t *testing.T) {
	parseMessage(":user\r\n")
	parseMessage(":\r\n")
	parseMessage(":")
	parseMessage("")
}