var containerStyle = function (urls, multipleSize, gapRow, gapColumn) {
    if (urls.length === 2 || urls.length === 4) {
        return 'width:' + (2 * multipleSize + gapRow) + 'rpx; grid-row-gap:' + gapColumn + 'rpx; grid-column-gap:' + gapRow + 'rpx;grid-template-columns:repeat(auto-fit, ' + multipleSize + 'rpx);'
    } else {
        return 'width:' + (3 * multipleSize + 2 * gapRow) + 'rpx; grid-row-gap:' + gapColumn + 'rpx; grid-column-gap:' + gapRow + 'rpx;grid-template-columns:repeat(auto-fit, ' + multipleSize + 'rpx);'
    }

}

var blockClass = function (urls, horizontalScreen) {
    if (urls.length === 1) {
        if (horizontalScreen) {
            return 'l-single-image-class'
        } else {
            return 'vertical l-single-image-class'
        }
    } else {
        return 'l-multi-image-class'
    }
}

var blockStyle = function (urls, horizontalScreen, shortSideValue, singleSize, multipleSize) {
    if (urls.length === 1) {
        if (horizontalScreen) {
            return 'height:' + shortSideValue + 'rpx;width:' + singleSize + 'rpx;'
        } else {
            return 'width:' + shortSideValue + 'rpx;height:' + singleSize + 'rpx;'
        }
    } else {
        return 'height:' + multipleSize + 'rpx;width:' + multipleSize + 'rpx;'
    }
}

var gridStyle = function (gapRow, gapColumn, multipleSize, everyRowNumber) {
    return 'display:inline-grid;grid-template-columns: repeat(' + everyRowNumber + ',' + multipleSize + 'rpx);grid-row-gap:' + gapRow + 'rpx;grid-column-gap:' + gapColumn + 'rpx;'
}

var dimBack = function (isLong, index, maxNumber, previewFullImage) {
    if (previewFullImage) {
        if (isLong) {
            if (index == maxNumber - 1) {
                return 'dimback'
            }
        }
    }
    return ''
}

var dim = function (isLong, index, maxNumber, previewFullImage) {
    if (previewFullImage) {
        if (isLong) {
            if (index == maxNumber - 1) {
                return 'dim'
            }
        }
    }
    return ''
}

var image = function (isLong, index, maxNumber, previewFullImage) {
    if (previewFullImage) {
        if (isLong) {
            if (index == maxNumber - 1) {
                return true
            }
        }
    }
    return false
}

module.exports = {
    containerStyle: containerStyle,
    blockClass: blockClass,
    blockStyle: blockStyle,
    gridStyle: gridStyle,
    dimBack: dimBack,
    dim: dim,
    image: image,
}