package excelize

import (
	"path/filepath"
	"testing"

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

func TestMergeCell(t *testing.T) {
	f, err := OpenFile(filepath.Join("test", "Book1.xlsx"))
	if !assert.NoError(t, err) {
		t.FailNow()
	}
	assert.EqualError(t, f.MergeCell("Sheet1", "A", "B"), newCellNameToCoordinatesError("A", newInvalidCellNameError("A")).Error())
	for _, cells := range [][]string{
		{"D9", "D9"},
		{"D9", "E9"},
		{"H14", "G13"},
		{"C9", "D8"},
		{"F11", "G13"},
		{"H7", "B15"},
		{"D11", "F13"},
		{"G10", "K12"},
	} {
		assert.NoError(t, f.MergeCell("Sheet1", cells[0], cells[1]))
	}
	assert.NoError(t, f.SetCellValue("Sheet1", "G11", "set value in merged cell"))
	assert.NoError(t, f.SetCellInt("Sheet1", "H11", 100))
	assert.NoError(t, f.SetCellValue("Sheet1", "I11", 0.5))
	assert.NoError(t, f.SetCellHyperLink("Sheet1", "J11", "https://github.com/xuri/excelize", "External"))
	assert.NoError(t, f.SetCellFormula("Sheet1", "G12", "SUM(Sheet1!B19,Sheet1!C19)"))
	value, err := f.GetCellValue("Sheet1", "H11")
	assert.Equal(t, "100", value)
	assert.NoError(t, err)
	// Merged cell ref is single coordinate
	value, err = f.GetCellValue("Sheet2", "A6")
	assert.Equal(t, "", value)
	assert.NoError(t, err)
	value, err = f.GetCellFormula("Sheet1", "G12")
	assert.Equal(t, "SUM(Sheet1!B19,Sheet1!C19)", value)
	assert.NoError(t, err)

	_, err = f.NewSheet("Sheet3")
	assert.NoError(t, err)

	for _, cells := range [][]string{
		{"D11", "F13"},
		{"G10", "K12"},
		{"B1", "D5"}, // B1:D5
		{"E1", "F5"}, // E1:F5
		{"H2", "I5"},
		{"I4", "J6"}, // H2:J6
		{"M2", "N5"},
		{"L4", "M6"}, // L2:N6
		{"P4", "Q7"},
		{"O2", "P5"}, // O2:Q7
		{"A9", "B12"},
		{"B7", "C9"}, // A7:C12
		{"E9", "F10"},
		{"D8", "G12"},
		{"I8", "I12"},
		{"I10", "K10"},
		{"M8", "Q13"},
		{"N10", "O11"},
	} {
		assert.NoError(t, f.MergeCell("Sheet3", cells[0], cells[1]))
	}

	// Test merge cells on not exists worksheet
	assert.EqualError(t, f.MergeCell("SheetN", "N10", "O11"), "sheet SheetN does not exist")
	// Test merged cells with invalid sheet name
	assert.EqualError(t, f.MergeCell("Sheet:1", "N10", "O11"), ErrSheetNameInvalid.Error())
	assert.NoError(t, f.SaveAs(filepath.Join("test", "TestMergeCell.xlsx")))
	assert.NoError(t, f.Close())

	f = NewFile()
	assert.NoError(t, f.MergeCell("Sheet1", "A2", "B3"))
	ws, ok := f.Sheet.Load("xl/worksheets/sheet1.xml")
	assert.True(t, ok)
	ws.(*xlsxWorksheet).MergeCells = &xlsxMergeCells{Cells: []*xlsxMergeCell{nil, nil}}
	assert.NoError(t, f.MergeCell("Sheet1", "A2", "B3"))
	// Test getting merged cells with the same start and end axis
	ws.(*xlsxWorksheet).MergeCells = &xlsxMergeCells{Cells: []*xlsxMergeCell{{Ref: "A1"}}}
	mergedCells, err := f.GetMergeCells("Sheet1")
	assert.NoError(t, err)
	assert.Equal(t, "A1", mergedCells[0].GetStartAxis())
	assert.Equal(t, "A1", mergedCells[0].GetEndAxis())
	assert.Empty(t, mergedCells[0].GetCellValue())
}

func TestMergeCellOverlap(t *testing.T) {
	f := NewFile()
	assert.NoError(t, f.MergeCell("Sheet1", "A1", "C2"))
	assert.NoError(t, f.MergeCell("Sheet1", "B2", "D3"))
	assert.NoError(t, f.SaveAs(filepath.Join("test", "TestMergeCellOverlap.xlsx")))

	f, err := OpenFile(filepath.Join("test", "TestMergeCellOverlap.xlsx"))
	if !assert.NoError(t, err) {
		t.FailNow()
	}
	mc, err := f.GetMergeCells("Sheet1")
	assert.NoError(t, err)
	assert.Len(t, mc, 1)
	assert.Equal(t, "A1", mc[0].GetStartAxis())
	assert.Equal(t, "D3", mc[0].GetEndAxis())
	assert.Equal(t, "", mc[0].GetCellValue())
	assert.NoError(t, f.Close())
}

func TestGetMergeCells(t *testing.T) {
	wants := []struct {
		value string
		start string
		end   string
	}{{
		value: "A1",
		start: "A1",
		end:   "B1",
	}, {
		value: "A2",
		start: "A2",
		end:   "A3",
	}, {
		value: "A4",
		start: "A4",
		end:   "B5",
	}, {
		value: "A7",
		start: "A7",
		end:   "C10",
	}}

	f, err := OpenFile(filepath.Join("test", "MergeCell.xlsx"))
	if !assert.NoError(t, err) {
		t.FailNow()
	}
	sheet1 := f.GetSheetName(0)

	mergeCells, err := f.GetMergeCells(sheet1)
	if !assert.Len(t, mergeCells, len(wants)) {
		t.FailNow()
	}
	assert.NoError(t, err)

	for i, m := range mergeCells {
		assert.Equal(t, wants[i].value, m.GetCellValue())
		assert.Equal(t, wants[i].start, m.GetStartAxis())
		assert.Equal(t, wants[i].end, m.GetEndAxis())
	}
	// Test get merged cells with invalid sheet name
	_, err = f.GetMergeCells("Sheet:1")
	assert.EqualError(t, err, ErrSheetNameInvalid.Error())
	// Test get merged cells on not exists worksheet
	_, err = f.GetMergeCells("SheetN")
	assert.EqualError(t, err, "sheet SheetN does not exist")
	assert.NoError(t, f.Close())
}

func TestUnmergeCell(t *testing.T) {
	f, err := OpenFile(filepath.Join("test", "MergeCell.xlsx"))
	if !assert.NoError(t, err) {
		t.FailNow()
	}
	sheet1 := f.GetSheetName(0)

	sheet, err := f.workSheetReader(sheet1)
	assert.NoError(t, err)

	mergeCellNum := len(sheet.MergeCells.Cells)

	assert.EqualError(t, f.UnmergeCell("Sheet1", "A", "A"), newCellNameToCoordinatesError("A", newInvalidCellNameError("A")).Error())

	// Test unmerge the merged cells that contains A1
	assert.NoError(t, f.UnmergeCell(sheet1, "A1", "A1"))
	if len(sheet.MergeCells.Cells) != mergeCellNum-1 {
		t.FailNow()
	}

	assert.NoError(t, f.SaveAs(filepath.Join("test", "TestUnmergeCell.xlsx")))
	assert.NoError(t, f.Close())

	f = NewFile()
	assert.NoError(t, f.MergeCell("Sheet1", "A2", "B3"))
	// Test unmerged range reference on not exists worksheet
	assert.EqualError(t, f.UnmergeCell("SheetN", "A1", "A1"), "sheet SheetN does not exist")

	// Test unmerge the merged cells with invalid sheet name
	assert.EqualError(t, f.UnmergeCell("Sheet:1", "A1", "A1"), ErrSheetNameInvalid.Error())

	ws, ok := f.Sheet.Load("xl/worksheets/sheet1.xml")
	assert.True(t, ok)
	ws.(*xlsxWorksheet).MergeCells = nil
	assert.NoError(t, f.UnmergeCell("Sheet1", "H7", "B15"))

	ws, ok = f.Sheet.Load("xl/worksheets/sheet1.xml")
	assert.True(t, ok)
	ws.(*xlsxWorksheet).MergeCells = &xlsxMergeCells{Cells: []*xlsxMergeCell{nil, nil}}
	assert.NoError(t, f.UnmergeCell("Sheet1", "H15", "B7"))

	ws, ok = f.Sheet.Load("xl/worksheets/sheet1.xml")
	assert.True(t, ok)
	ws.(*xlsxWorksheet).MergeCells = &xlsxMergeCells{Cells: []*xlsxMergeCell{{Ref: "A1"}}}
	assert.NoError(t, f.UnmergeCell("Sheet1", "A2", "B3"))

	ws, ok = f.Sheet.Load("xl/worksheets/sheet1.xml")
	assert.True(t, ok)
	ws.(*xlsxWorksheet).MergeCells = &xlsxMergeCells{Cells: []*xlsxMergeCell{{Ref: "A:A"}}}
	assert.EqualError(t, f.UnmergeCell("Sheet1", "A2", "B3"), newCellNameToCoordinatesError("A", newInvalidCellNameError("A")).Error())
}

func TestFlatMergedCells(t *testing.T) {
	ws := &xlsxWorksheet{MergeCells: &xlsxMergeCells{Cells: []*xlsxMergeCell{{Ref: ""}}}}
	assert.EqualError(t, flatMergedCells(ws, [][]*xlsxMergeCell{}), "cannot convert cell \"\" to coordinates: invalid cell name \"\"")
}

func TestMergeCellsParser(t *testing.T) {
	ws := &xlsxWorksheet{MergeCells: &xlsxMergeCells{Cells: []*xlsxMergeCell{nil}}}
	_, err := ws.mergeCellsParser("A1")
	assert.NoError(t, err)
}