package nodes

import (
	"os"
	"testing"
	"time"

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

var np *NodesProcessor

const testDumpFile = "nodes.json"

func TestMain(m *testing.M) {
	np = NewNodesProcessor(testDumpFile, 2)

	os.Exit(m.Run())
}

func TestNodesProcessor_GarbageCollect(t *testing.T) {
	np.Refresh("test", Labels{"mylabel"}, KV{"mykey": "my value"})
	assert.Equal(t, 1, len(np.List()))
	time.Sleep(5 * time.Second)
	np.garbageCollect()
	assert.Equal(t, 0, len(np.List()))
}

func TestNodesProcessor_Refresh(t *testing.T) {
	np.Reset()

	np.Refresh("test", Labels{"mylabel"}, KV{"mykey": "my value"})
	np.Refresh("test2", Labels{"mylabel3"}, KV{"mykey3": "my value3"})

	nodes := np.List()
	assert.Equal(t, "test", nodes[0].HostName)
	assert.Contains(t, nodes[0].Labels, "mylabel")
	assert.Equal(t, "test2", nodes[1].HostName)
	assert.Contains(t, nodes[1].Labels, "mylabel3")
}

func TestNodesProcessor_DumpLoad(t *testing.T) {
	np.Reset()

	np.Refresh("test", Labels{"mylabel"}, KV{"mykey": "my value"})
	np.Refresh("test2", Labels{"mylabel3"}, KV{"mykey3": "my value3"})

	os.Remove(testDumpFile)

	np.Dump()
	np.Reset()
	assert.Equal(t, 0, len(np.List()))

	np.Load()
	assert.Equal(t, 2, len(np.List()))

	nodes := np.List()
	assert.Len(t, nodes, 2)
}

func TestNodesProcessor_List(t *testing.T) {
	np.Reset()

	np.Refresh("test", Labels{"mylabel"}, KV{"mykey": "my value"})
	nodes := np.List()
	assert.Equal(t, "test", nodes[0].HostName)
	assert.Contains(t, nodes[0].Labels, "mylabel")

}

func TestNodesProcessor_Get(t *testing.T) {
	np.Reset()
	np.Refresh("test", Labels{"mylabel"}, KV{"mykey": "my value"})
	node, _ := np.Get("test")

	assert.Contains(t, node.Labels, "mylabel")

}

func TestNodesProcessor_Drop(t *testing.T) {
	np.Reset()
	np.Refresh("test", Labels{"mylabel"}, KV{"mykey": "my value"})
	node, _ := np.Get("test")

	assert.Contains(t, node.Labels, "mylabel")

	np.Drop("test")
	assert.Zero(t, len(np.List()))

}

// TODO: TestNodesProcessor_GetMetrics