package excelize

import (
	"bytes"
	"encoding/xml"
	"testing"

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

func TestChartSize(t *testing.T) {
	xlsx := NewFile()
	sheet1 := xlsx.GetSheetName(1)

	categories := map[string]string{
		"A2": "Small",
		"A3": "Normal",
		"A4": "Large",
		"B1": "Apple",
		"C1": "Orange",
		"D1": "Pear",
	}
	for cell, v := range categories {
		xlsx.SetCellValue(sheet1, cell, v)
	}

	values := map[string]int{
		"B2": 2,
		"C2": 3,
		"D2": 3,
		"B3": 5,
		"C3": 2,
		"D3": 4,
		"B4": 6,
		"C4": 7,
		"D4": 8,
	}
	for cell, v := range values {
		xlsx.SetCellValue(sheet1, cell, v)
	}

	xlsx.AddChart("Sheet1", "E4", `{"type":"col3DClustered","dimension":{"width":640, "height":480},`+
		`"series":[{"name":"Sheet1!$A$2","categories":"Sheet1!$B$1:$D$1","values":"Sheet1!$B$2:$D$2"},`+
		`{"name":"Sheet1!$A$3","categories":"Sheet1!$B$1:$D$1","values":"Sheet1!$B$3:$D$3"},`+
		`{"name":"Sheet1!$A$4","categories":"Sheet1!$B$1:$D$1","values":"Sheet1!$B$4:$D$4"}],`+
		`"title":{"name":"Fruit 3D Clustered Column Chart"}}`)

	var (
		buffer bytes.Buffer
	)

	// Save xlsx file by the given path.
	err := xlsx.Write(&buffer)
	if !assert.NoError(t, err) {
		t.FailNow()
	}

	newFile, err := OpenReader(&buffer)
	if !assert.NoError(t, err) {
		t.FailNow()
	}

	chartsNum := newFile.countCharts()
	if !assert.Equal(t, 1, chartsNum, "Expected 1 chart, actual %d", chartsNum) {
		t.FailNow()
	}

	var (
		workdir decodeWsDr
		anchor  decodeTwoCellAnchor
	)

	content, ok := newFile.XLSX["xl/drawings/drawing1.xml"]
	assert.True(t, ok, "Can't open the chart")

	err = xml.Unmarshal([]byte(content), &workdir)
	if !assert.NoError(t, err) {
		t.FailNow()
	}

	err = xml.Unmarshal([]byte("<decodeTwoCellAnchor>"+
		workdir.TwoCellAnchor[0].Content+"</decodeTwoCellAnchor>"), &anchor)
	if !assert.NoError(t, err) {
		t.FailNow()
	}

	if !assert.Equal(t, 4, anchor.From.Col, "Expected 'from' column 4") ||
		!assert.Equal(t, 3, anchor.From.Row, "Expected 'from' row 3") {

		t.FailNow()
	}

	if !assert.Equal(t, 14, anchor.To.Col, "Expected 'to' column 14") ||
		!assert.Equal(t, 27, anchor.To.Row, "Expected 'to' row 27") {

		t.FailNow()
	}
}

func TestAddDrawingChart(t *testing.T) {
	f := NewFile()
	assert.EqualError(t, f.addDrawingChart("SheetN", "", "", 0, 0, 0, nil), `cannot convert cell "" to coordinates: invalid cell name ""`)
}