package types

import (
	"encoding/json"
	"testing"

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

func TestAppendEvents(t *testing.T) {
	e1 := NewEvent("transfer", NewAttribute("sender", "foo"))
	e2 := NewEvent("transfer", NewAttribute("sender", "bar"))
	a := Events{e1}
	b := Events{e2}
	c := a.AppendEvents(b)
	require.Equal(t, c, Events{e1, e2})
	require.Equal(t, c, Events{e1}.AppendEvent(NewEvent("transfer", NewAttribute("sender", "bar"))))
	require.Equal(t, c, Events{e1}.AppendEvents(Events{e2}))
}

func TestAppendAttributes(t *testing.T) {
	e := NewEvent("transfer", NewAttribute("sender", "foo"))
	e = e.AppendAttributes(NewAttribute("recipient", "bar"))
	require.Len(t, e.Attributes, 2)
	require.Equal(t, e, NewEvent("transfer", NewAttribute("sender", "foo"), NewAttribute("recipient", "bar")))
}

func TestEmptyEvents(t *testing.T) {
	require.Equal(t, EmptyEvents(), Events{})
}

func TestAttributeString(t *testing.T) {
	require.Equal(t, "foo: bar", NewAttribute("foo", "bar").String())
}

func TestToABCIEvents(t *testing.T) {
	e := Events{NewEvent("transfer", NewAttribute("sender", "foo"))}
	abciEvents := e.ToABCIEvents()
	require.Len(t, abciEvents, 1)
	require.Equal(t, abciEvents[0].Type, e[0].Type)
	require.Equal(t, abciEvents[0].Attributes, e[0].Attributes)
}

func TestEventManager(t *testing.T) {
	em := NewEventManager()
	event := NewEvent("reward", NewAttribute("x", "y"))
	events := Events{NewEvent("transfer", NewAttribute("sender", "foo"))}

	em.EmitEvents(events)
	em.EmitEvent(event)

	require.Len(t, em.Events(), 2)
	require.Equal(t, em.Events(), events.AppendEvent(event))
}

func TestStringifyEvents(t *testing.T) {
	e := Events{
		NewEvent("message", NewAttribute("sender", "foo")),
		NewEvent("message", NewAttribute("module", "bank")),
	}
	se := StringifyEvents(e.ToABCIEvents())

	expectedTxtStr := "\t\t- message\n\t\t\t- sender: foo\n\t\t\t- module: bank"
	require.Equal(t, expectedTxtStr, se.String())

	bz, err := json.Marshal(se)
	require.NoError(t, err)

	expectedJSONStr := "[{\"type\":\"message\",\"attributes\":[{\"key\":\"sender\",\"value\":\"foo\"},{\"key\":\"module\",\"value\":\"bank\"}]}]"
	require.Equal(t, expectedJSONStr, string(bz))
}