package cp3000

import (
	"bytes"
	"testing"

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

func TestSend(t *testing.T) {
	var buffer bytes.Buffer
	assert.Nil(t, Send(&buffer, "SENDSMS", "0655866244", "I still know what you did last summer"))
	assert.Equal(t, "$SENDSMS,\"0655866244\",\"I still know what you did last summer\"*5C\n", buffer.String())

	buffer.Reset()
	assert.Nil(t, Send(&buffer, "SENDSMS", "0629584133", "I still know what you did last summer"))
	assert.Equal(t, "$SENDSMS,\"0629584133\",\"I still know what you did last summer\"*55\n", buffer.String())

	buffer.Reset()
	assert.Nil(t, Send(&buffer, "SENDSMS", "0629584133", "Rik is cool"))
	assert.Equal(t, "$SENDSMS,\"0629584133\",\"Rik is cool\"*11\n", buffer.String())
}

func TestDecode(t *testing.T) {
	testcmds := []struct {
		input string
		cmd   Command
		args  []string
		t     Type
	}{
		{
			input: `$SENDSMS,"+31627151473","Project 'RC functional test' has been returned"*6E`,
			cmd:   CommandSendSMS,
			args:  []string{"+31627151473", "Project 'RC functional test' has been returned"},
			t:     TypeCommand,
		},
		{
			input: `$WD*13`,
			cmd:   CommandWatchdog,
			args:  []string{},
			t:     TypeCommand,
		},
		{
			input: `!00*00`,
			cmd:   Command("00"),
			args:  []string{},
			t:     TypeReply,
		},
		{
			input: `$RETR,hallo*5B`,
			cmd:   CommandRetrieve,
			args:  []string{"hallo"},
			t:     TypeCommand,
		},
		{
			input: `$SENDSMS,"+31627151473","Periode 'A' \"van\" project 'RC functional test' is gedeactiveerd"*2D`,
			cmd:   CommandSendSMS,
			args:  []string{"+31627151473", "Periode 'A' \"van\" project 'RC functional test' is gedeactiveerd"},
			t:     TypeCommand,
		},
	}
	for _, cmd := range testcmds {
		msg, err := Decode(cmd.input)
		assert.Nil(t, err)
		assert.Equal(t, cmd.cmd, msg.Command)
		assert.Equal(t, cmd.t, msg.Type)
		assert.Equal(t, len(cmd.args), len(msg.Params))
		assert.ElementsMatch(t, cmd.args, msg.Params)
	}
}

func TestDecodeError(t *testing.T) {
	testcmds := []struct {
		input string
		err   string
	}{
		{
			input: `#SENDSMS,"+31627151473","Project 'RC functional test' has been returned"*6E`,
			err:   "no cmd start: #",
		},
		{
			input: `$WD*14`,
			err:   "checksum mismatch (recv 14, calc 13)",
		},
		{
			input: `$SENDSMS,"+31627151473","Perd*2D`,
			err:   "incomplete message",
		},
	}
	for _, cmd := range testcmds {
		msg, err := Decode(cmd.input)
		assert.NotNil(t, err)
		assert.Nil(t, msg)
		assert.Equal(t, cmd.err, err.Error())
	}
}