package formatters

import (
	"bufio"
	"bytes"
	"fmt"
	"testing"
	"time"

	"codeberg.org/danjones000/my-log/models"
	"codeberg.org/danjones000/my-log/tools"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func TestPlainLogs(t *testing.T) {
	m := []models.Meta{
		{"foo", "bar"},
		{"baz", 42},
	}
	e := []models.Entry{
		{Title: "one", Date: time.Now(), Fields: m},
		{Title: "small", Date: time.Now()},
	}
	l := models.Log{"stuff", e}
	e2 := models.Entry{
		Title: "three",
		Date:  time.Now(),
	}
	l2 := models.Log{"more-stuff", []models.Entry{e2}}
	logs := []models.Log{l, l2}

	f, err := New("plain")
	require.NoError(t, err)

	out, err := f.Logs(logs)
	require.NoError(t, err)

	read := bytes.NewReader(out)
	scan := bufio.NewScanner(read)

	scan.Scan()
	line := scan.Text()
	assert.Equal(t, l.Name, line)

	scan.Scan()
	line = scan.Text()
	assert.Equal(t, "#######", line)

	scan.Scan()
	scan.Scan()
	line = scan.Text()
	assert.Equal(t, "Title: "+e[0].Title, line)

	scan.Scan()
	line = scan.Text()
	assert.Equal(t, "Date: "+e[0].Date.Format(tools.DateFormat), line)

	scan.Scan()
	line = scan.Text()
	assert.Equal(t, "foo: bar", line)

	scan.Scan()
	line = scan.Text()
	assert.Equal(t, "baz: 42", line)

	scan.Scan()
	scan.Scan()
	line = scan.Text()
	assert.Equal(t, "Title: "+e[1].Title, line)

	scan.Scan()
	line = scan.Text()
	assert.Equal(t, "Date: "+e[1].Date.Format(tools.DateFormat), line)

	scan.Scan()
	scan.Scan()
	line = scan.Text()
	assert.Equal(t, l2.Name, line)

	scan.Scan()
	line = scan.Text()
	assert.Equal(t, "#######", line)

	scan.Scan()
	scan.Scan()
	line = scan.Text()
	assert.Equal(t, "Title: "+e2.Title, line)

	scan.Scan()
	line = scan.Text()
	assert.Equal(t, "Date: "+e2.Date.Format(tools.DateFormat), line)

	more := scan.Scan()
	assert.False(t, more)
}

func TestPlainName(t *testing.T) {
	f, _ := New("plain")
	assert.Equal(t, "plain", f.Name())
}

func TestPlainLogNone(t *testing.T) {
	f, _ := New("plain")
	out, err := f.Logs([]models.Log{})
	assert.NoError(t, err)
	assert.Len(t, out, 0)
}

func TestPlainLogNoEntries(t *testing.T) {
	f, _ := New("plain")
	out, err := f.Log(models.Log{Name: "foo"})
	assert.NoError(t, err)
	assert.Len(t, out, 0)
}

func TestPlainMetaEmpty(t *testing.T) {
	f, _ := New("plain")
	out, err := f.Meta(models.Meta{"foo", ""})
	assert.NoError(t, err)
	assert.Len(t, out, 0)
}

func TestPlainMetaError(t *testing.T) {
	f, _ := New("plain")
	out, err := f.Meta(models.Meta{"foo", make(chan bool)})
	assert.Error(t, err)
	assert.Len(t, out, 0)
}

func TestPlainEntry(t *testing.T) {
	f, _ := New("plain")
	now := time.Now()
	out, err := f.Entry(models.Entry{
		Title: "foo",
		Date:  now,
	})
	assert.NoError(t, err)
	assert.Equal(t, fmt.Sprintf("Title: foo\nDate: %s", now.Format(tools.DateFormat)), string(out))
}