function formattedFiles(list) {
    if (list.length == 0) return [];
    let suffixList = {
            image: ['png', 'jpg', 'jpeg', 'bmp', 'gif', 'webp', 'svg', 'tiff'],
            video: ['mp4', 'ogg', 'webm'],
            word: ['doc', 'docx'],
            excel: ['xls', 'xlsx'],
            ppt: ['ppt', 'pptx'],
            txt: ['txt', 'md', 'js', 'json'],
            pdf: ['pdf'],
            rar: ['7z', 'zip', 'rar', 'kz', 'ace', 'arj', 'bz2', 'cab', 'gz', 'iso', 'jar', 'lzh', 'tar', 'z'],
            folder: ['folder']
        },
        typeList = [];
    for (let key in suffixList) typeList.push(key);
    for (let i = 0; i < list.length; i++) {
        list[i].fileType = 'unknown';
        const suffix = list[i].postfix.toLowerCase();
        if (suffix != "folder") {
            for (var key in suffixList) {
                if (suffixList[key].some(value => value == suffix)) list[i].fileType = key;
            }
        } else {
            list[i].fileType = "folder";
        }
    }
    return list;
}

/* 预览媒体 */
function viewMedias(files, index, type) {
    // #ifndef MP
    if (type == 'image') {
        uni.previewImage({
            current: index,
            urls: files,
            loop: true,
        })
    } else {
        window.open(files[index].url)
    }
    // #endif
    // #ifdef MP-WEIXIN
    uni.previewMedia({
        current: index,
        sources: files,
    })
    // #endif       
}

/* 预览图片 */
function viewImage(url) {
    // #ifndef MP
    uni.previewImage({
        current: 0,
        urls: [url],
        loop: true,
    })
    // #endif
    // #ifdef MP-WEIXIN
    uni.previewImage({
        urls: [url]
    })
    // #endif       
}

/* 预览文档 */
function viewFlies(item) {
    uni.showLoading({
        title: '加载中...',
    })
    uni.downloadFile({
        url: item.url,
        complete({
            statusCode,
            tempFilePath
        }) {
            if (statusCode != 200) return;
            uni.openDocument({
                filePath: tempFilePath,
                fileType: item.postfix,
                showMenu: true,
                complete({
                    errMsg
                }) {
                    uni.hideLoading();
                    if (errMsg != "openDocument:ok") uni.showToast({
                        title: '打开失败',
                        icon: "none"
                    })
                }
            })
        }
    })
}

function wxSaveFile(file) {
    const fs = uni.getFileSystemManager(),
        basePath = String(`${uni.env.USER_DATA_PATH}/${file.postfix}`);
    fs.access({
        path: basePath,
        success(res) {
            fs.getSavedFileList({
                success: res => {
                    console.log("临时文件列表", res)
                }
            })
        },
        fail(res) {
            fs.mkdir({
                dirPath: basePath,
                recursive: true,
                success(res) {
                    console.log("创建目录", res)
                },
                fail(res) {
                    console.error("创建目录", res)
                }
            })
        }
    })
    const downloadTask = uni.downloadFile({
        url: file.url,
        filePath: basePath + '/' + file.document,
        timeout: 6000000,
        success(res) {
            console.log("下载文件", res)
            if (file.fileType == "video") {
                saveVideo(res.filePath)
            } else {
                saveImage(res.filePath)
            }

            function shareVideo() {
                uni.shareVideoMessage({
                    videoPath: res.tempFilePath,
                    complete(res) {
                        console.log("转发", res)
                        clearFile(filePath)
                        /* uni.showToast({
                            title: `转发失败:${err.errMsg}`,
                            icon: "none"
                        }) */
                    }
                })
            }

            function saveImage(filePath) {
                uni.saveImageToPhotosAlbum({
                    filePath,
                    success(res) {
                        console.log("保存图片", res)
                        uni.showModal({
                            title: '提示',
                            content: '文件已保存到系统相册',
                            showCancel: false
                        })
                        uni.hideLoading()
                        clearFile(filePath)
                    },
                    fail(err) {
                        console.log("保存失败", err)
                        if (err.errno == 103) {
                            uni.showModal({
                                title: '提示',
                                content: '未获取保存相册权限,无法保存!',
                                confirmText: "前去授权",
                                success({
                                    confirm
                                }) {
                                    if (confirm) uni.openSetting({
                                        success(res) {
                                            console.log(res.authSetting["scope.writePhotosAlbum"])
                                            if (res.authSetting["scope.writePhotosAlbum"]) {
                                                saveVideo(filePath)
                                            } else {
                                                uni.showToast({
                                                    title: '未获得授权',
                                                    icon: "none"
                                                })
                                            }
                                        }
                                    })
                                }
                            })
                        } else {
                            clearFile(filePath)
                            uni.showToast({
                                title: err,
                                icon: "none"
                            })
                        }
                    }
                })
            }

            function saveVideo(filePath) {
                uni.saveVideoToPhotosAlbum({
                    filePath,
                    success(res) {
                        console.log("保存商品", res)
                        uni.showModal({
                            title: '提示',
                            content: '视频已保存到系统相册',
                            showCancel: false
                        })
                        uni.hideLoading()
                        clearFile(filePath)
                    },
                    fail(err) {
                        console.log("保存失败", err)
                        if (err.errno == 103) {
                            uni.showModal({
                                title: '提示',
                                content: '未获取保存相册权限,无法保存!',
                                confirmText: "前去授权",
                                success({
                                    confirm
                                }) {
                                    if (confirm) uni.openSetting({
                                        success(res) {
                                            console.log(res.authSetting["scope.writePhotosAlbum"])
                                            if (res.authSetting["scope.writePhotosAlbum"]) {
                                                saveVideo(filePath)
                                            } else {
                                                uni.showToast({
                                                    title: '未获得授权',
                                                    icon: "none"
                                                })
                                            }
                                        }
                                    })
                                }
                            })
                        } else {
                            clearFile(filePath)
                            uni.showToast({
                                title: err,
                                icon: "none"
                            })
                        }
                    }
                })
            }

            function clearFile(filePath) {
                let fs = uni.getFileSystemManager()
                fs.unlink({
                    filePath,
                    success(res) {
                        console.log("文件删除", res)
                    },
                    fail(res) {
                        console.log("删除失败", res)
                    }
                })
            }

        },
        fail(err) {
            console.log("下载失败", err)
            uni.showToast({
                title: `下载失败:${err.errMsg}`,
                icon: "none"
            })
            if (err.errMsg == 'downloadFile:fail exceed max file size') uni.showToast({
                title: '视频体积超大,无法保存！请尝试打开视频长按保存下载',
                icon: "none"
            })
        }
    })
    downloadTask.onProgressUpdate((res) => {
        uni.showLoading({
            title: res.progress + `%`,
            mask: true
        })
        if (res.progress == 100) uni.hideLoading()
    })
}
module.exports = {
    viewMedias,
    viewFlies,
    formattedFiles,
    viewImage,
    wxSaveFile
}