package excelize

import (
	"encoding/xml"
	"strconv"
	"strings"
)

// GetRows return all the rows in a sheet, for example:
//
//    rows := xlsx.GetRows("Sheet2")
//    for _, row := range rows {
//        for _, colCell := range row {
//            fmt.Print(colCell, "\t")
//        }
//        fmt.Println()
//    }
//
func (f *File) GetRows(sheet string) [][]string {
	xlsx := xlsxWorksheet{}
	r := [][]string{}
	name := `xl/worksheets/` + strings.ToLower(sheet) + `.xml`
	err := xml.Unmarshal([]byte(f.readXML(name)), &xlsx)
	if err != nil {
		return r
	}
	rows := xlsx.SheetData.Row
	for _, row := range rows {
		c := []string{}
		for _, colCell := range row.C {
			val, _ := colCell.getValueFrom(f)
			c = append(c, val)
		}
		r = append(r, c)
	}
	return r
}

// readXMLSST read xmlSST simple function.
func readXMLSST(f *File) (xlsxSST, error) {
	shardStrings := xlsxSST{}
	err := xml.Unmarshal([]byte(f.readXML(`xl/sharedStrings.xml`)), &shardStrings)
	return shardStrings, err
}

// getValueFrom return a value from a column/row cell,
// this function is inteded to be used with for range on rows
// an argument with the xlsx opened file.
func (xlsx *xlsxC) getValueFrom(f *File) (string, error) {
	switch xlsx.T {
	case "s":
		xlsxSI := 0
		xlsxSI, _ = strconv.Atoi(xlsx.V)
		d, err := readXMLSST(f)
		if err != nil {
			return "", err
		}
		return d.SI[xlsxSI].T, nil
	case "str":
		return xlsx.V, nil
	default:
		return xlsx.V, nil
	}
}