import { BaseApi } from './baseApi.js'
import api from './index.js'

function parseResult(response) {
	let result = response && response.data
	if (typeof result === 'string') {
		try {
			result = JSON.parse(result)
		} catch (error) {
			throw new Error('上传失败，请重试')
		}
	}
	if (!response || response.statusCode !== 200 || !result || result.code !== 0) {
		throw new Error(result && result.msg ? result.msg : '上传失败，请重试')
	}
	return result.data
}

function unwrap(response) {
	const result = response && response.data
	if (!result || result.code !== 0) {
		throw new Error(result && result.msg ? result.msg : '请求失败，请重试')
	}
	return result.data
}

function getHeader(headers, name) {
	if (!headers || typeof headers !== 'object') return ''
	const expectedName = name.toLowerCase()
	for (const key of Object.keys(headers)) {
		if (key.toLowerCase() === expectedName) return String(headers[key] || '')
	}
	return ''
}

function isDocumentDownload(headers) {
	const contentType = getHeader(headers, 'content-type').split(';')[0].trim().toLowerCase()
	const disposition = getHeader(headers, 'content-disposition').trim()
	if (!contentType || !/^attachment(?:\s*;|$)/i.test(disposition)) return false
	if (contentType === 'application/json' || contentType === 'text/json'
		|| contentType.endsWith('+json') || contentType === 'text/html'
		|| contentType === 'application/xhtml+xml') return false
	return true
}

export function uploadTeamBackgroundFile(teamId, filePath, onProgress = () => {}) {
	return new Promise((resolve, reject) => {
		const task = uni.uploadFile({
			url: `${BaseApi}/core/user/team/${teamId}/background-files`,
			filePath,
			name: 'file',
			header: { token: uni.getStorageSync('token') },
			success: response => {
				try {
					resolve(parseResult(response))
				} catch (error) {
					reject(error)
				}
			},
			fail: reject
		})
		task.onProgressUpdate(progress => onProgress(progress.progress))
	})
}

export const listTeamBackgroundFiles = teamId => api
	.get(`/core/user/team/${teamId}/background-files`, {}, false)
	.then(unwrap)

export const disableTeamBackgroundFile = (teamId, fileId) => api
	.del(`/core/user/team/${teamId}/background-files/${fileId}`, {}, false)
	.then(unwrap)

export const createTeamBackgroundSession = teamId => api
	.post(`/core/user/team/${teamId}/background-upload-session`, {}, false)
	.then(unwrap)

export function downloadTeamBackgroundFile(teamId, fileId) {
	return new Promise((resolve, reject) => {
		let responseHeaders
		const task = uni.downloadFile({
			url: `${BaseApi}/core/user/team/${teamId}/background-files/${fileId}/download`,
			header: { token: uni.getStorageSync('token') },
			success: result => {
				const resultHeaders = result && (result.header || result.headers)
				if (!result || result.statusCode !== 200
					|| !isDocumentDownload(responseHeaders || resultHeaders)) {
					reject(new Error('下载失败，请重试'))
					return
				}
				wx.openDocument({
					filePath: result.tempFilePath,
					showMenu: true,
					success: resolve,
					fail: reject
				})
			},
			fail: reject
		})
		if (task && typeof task.onHeadersReceived === 'function') {
			task.onHeadersReceived(result => {
				responseHeaders = result && (result.header || result.headers)
			})
		}
	})
}