import $store from '@/peach/store'
import { staticUrl } from '@/peach/config'

const cdn = (url = '', cdnurl = '') => {
    if (!url) return ''
    if (url.indexOf('http') === 0) {
        return url
    }
    if (cdnurl === '') {
        cdnurl = $store('app').info.cdnurl
    }
    return cdnurl + url
}
export default {
    // 添加cdn域名前缀
    cdn,
    // 对象存储自动剪裁缩略图
    thumb: (url = '', params) => {
        url = cdn(url)
        return append_thumbnail_params(url, params)
    },
    // 静态资源地址
    static: (url = '', staticurl = '') => {
        if (staticurl === '') {
            staticurl = staticUrl
        }
        if (staticurl !== 'local') {
            url = cdn(url, staticurl)
        }
        return url
    },
    // css背景图片地址
    css: (url = '', staticurl = '') => {
        if (staticurl === '') {
            staticurl = staticUrl
        }
        if (staticurl !== 'local') {
            url = cdn(url, staticurl)
        }
        // #ifdef APP-PLUS
        if (staticurl === 'local') {
            url = plus.io.convertLocalFileSystemURL(url)
        }
        // #endif
        return `url(${url})`
    },
}

/**
 * 追加对象存储自动裁剪/压缩参数
 *
 * @return string
 */
function append_thumbnail_params(url, params) {
    const filesystem = $store('app').info.filesystem
    if (filesystem === 'public') {
        return url
    }
    let width = params.width || '200' // 宽度
    let height = params.height || '200' // 高度
    let mode = params.mode || 'lfit' // 缩放模式
    let quality = params.quality || 90 // 压缩质量
    let gravity = params.gravity || 'center' // 剪裁质量
    let suffix = ''
    let crop_str = ''
    let quality_str = ''
    let size = width + 'x' + height
    switch (filesystem) {
        case 'aliyun':
            // 裁剪
            if (!gravity && gravity != 'center') {
                // 指定了裁剪区域
                mode = 'mfit'
                crop_str = '/crop,g_' + gravityFormatMap('aliyun', gravity) + ',w_' + width + ',h_' + height
            }

            // 质量压缩
            if (quality > 0 && quality < 100) {
                quality_str = '/quality,q_' + quality
            }

            // 缩放参数
            suffix = 'x-oss-process=image/resize,m_' + mode + ',w_' + width + ',h_' + height

            // 拼接裁剪和质量压缩
            suffix += crop_str + quality_str
            break
        case 'qcloud':
            let mode_str = 'thumbnail'
            if (mode == 'fill' || (!gravity && gravity != 'center')) {
                // 指定了裁剪区域
                mode_str = 'crop'
                mode = 'fill'
                crop_str = '/gravity/' + gravityFormatMap('qcloud', gravity)
            }

            // 质量压缩
            if (quality > 0 && quality < 100) {
                quality_str = '/rquality/' + quality
            }

            switch (mode) {
                case 'lfit':
                    size = '' + size + '>'
                    break
                case 'mfit':
                    size = '!' + size + 'r'
                case 'fill':
                    break
                case 'pad':
                    size = size + '/pad/1'
                    break
                case 'fixed':
                    size = size + '!'
                    break
            }

            suffix = 'imageMogr2/' + mode_str + '/' + size + crop_str + quality_str
            break
        case 'qiniu':
            if (mode == 'fill' || (!gravity && gravity != 'center')) {
                // 指定了裁剪区域,全部转为 mfit
                mode = 'mfit'
                crop_str = '/gravity/' + gravityFormatMap('qiniu', gravity) + '/crop/' + size
            }
            // 质量压缩
            if (quality > 0 && quality < 100) {
                quality_str = '/quality/' + quality
            }

            switch (mode) {
                case 'lfit':
                case 'pad': // 七牛不支持在缩放之后，尺寸不足时，填充背景色,所以这里和 lfit 模式一样
                    size = size + '>'
                    break
                case 'mfit':
                    size = '!' + size + 'r'
                    break
                case 'fill':
                    // 会被转为 mfit
                    break
                case 'fixed':
                    size = size + '!'
                    break
            }

            suffix = 'imageMogr2/thumbnail/' + size + crop_str + quality_str
            break
    }
    return url + '?' + suffix
}

/**
 * 裁剪区域格式转换
 *
 * @param string $type aliyun|qcloud|qiniu
 * @param string $gravity 统一的裁剪区域字符
 *
 * @return string
 */
function gravityFormatMap(type, gravity) {
    let gravityFormat = {
        aliyun: {
            north_west: 'nw', // 左上
            north: 'north', // 中上
            north_east: 'ne', // 右上
            west: 'west', // 左中
            center: 'center', // 中部
            east: 'east', // 右中
            south_west: 'sw', // 左下
            south: 'south', // 中下
            south_east: 'se', // 右下
        },
        qcloud: {
            northwest: 'nw', // 左上
            north: 'north', // 中上
            northeast: 'ne', // 右上
            west: 'west', // 左中
            center: 'center', // 中部
            east: 'east', // 右中
            southwest: 'sw', // 左下
            south: 'south', // 中下
            southeast: 'se', // 右下
        },
        qiniu: {
            NorthWest: 'nw', // 左上
            North: 'north', // 中上
            NorthEast: 'ne', // 右上
            West: 'west', // 左中
            Center: 'center', // 中部
            East: 'east', // 右中
            SouthWest: 'sw', // 左下
            South: 'south', // 中下
            SouthEast: 'se', // 右下
        },
    }

    return gravityFormat[type][gravity]
}