package logrus

import (
	"bytes"
	"encoding/json"
	"fmt"
	"testing"

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

func TestFieldValueError(t *testing.T) {
	buf := &bytes.Buffer{}
	l := &Logger{
		Out:       buf,
		Formatter: new(JSONFormatter),
		Hooks:     make(LevelHooks),
		Level:     DebugLevel,
	}
	l.WithField("func", func() {}).Info("test")
	fmt.Println(buf.String())
	var data map[string]interface{}
	if err := json.Unmarshal(buf.Bytes(), &data); err != nil {
		t.Error("unexpected error", err)
	}
	_, ok := data[FieldKeyLogrusError]
	require.True(t, ok, `cannot found expected "logrus_error" field: %v`, data)
}

func TestNoFieldValueError(t *testing.T) {
	buf := &bytes.Buffer{}
	l := &Logger{
		Out:       buf,
		Formatter: new(JSONFormatter),
		Hooks:     make(LevelHooks),
		Level:     DebugLevel,
	}
	l.WithField("str", "str").Info("test")
	fmt.Println(buf.String())
	var data map[string]interface{}
	if err := json.Unmarshal(buf.Bytes(), &data); err != nil {
		t.Error("unexpected error", err)
	}
	_, ok := data[FieldKeyLogrusError]
	require.False(t, ok)
}

func TestWarninglnNotEqualToWarning(t *testing.T) {
	buf := &bytes.Buffer{}
	bufln := &bytes.Buffer{}

	formatter := new(TextFormatter)
	formatter.DisableTimestamp = true
	formatter.DisableLevelTruncation = true

	l := &Logger{
		Out:       buf,
		Formatter: formatter,
		Hooks:     make(LevelHooks),
		Level:     DebugLevel,
	}
	l.Warning("hello,", "world")

	l.SetOutput(bufln)
	l.Warningln("hello,", "world")

	assert.NotEqual(t, buf.String(), bufln.String(), "Warning() and Wantingln() should not be equal")
}

type testBufferPool struct {
	buffers []*bytes.Buffer
	get int
}

func (p *testBufferPool) Get() *bytes.Buffer {
	p.get++
	return new(bytes.Buffer)
}

func (p *testBufferPool) Put(buf *bytes.Buffer) {
	p.buffers = append(p.buffers, buf)
}

func TestLogger_SetBufferPool(t *testing.T) {
	out := &bytes.Buffer{}
	l := New()
	l.SetOutput(out)

	pool := new(testBufferPool)
	l.SetBufferPool(pool)

	l.Info("test")

	assert.Equal(t, pool.get, 1, "Logger.SetBufferPool(): The BufferPool.Get() must be called")
	assert.Len(t, pool.buffers, 1, "Logger.SetBufferPool(): The BufferPool.Put() must be called")
}