/**
 * 截取日期
 */
export const runcation = (date) => {
	return date.substring(0, 16)
}

// 返回距离
export function distance(lat1, lng1, lat2, lng2) {
	var that = this;
	let rad1 = lat1 * Math.PI / 180.0;
	let rad2 = lat2 * Math.PI / 180.0;
	let a = rad1 - rad2;
	let b = lng1 * Math.PI / 180.0 - lng2 * Math.PI / 180.0;
	let s = 2 * Math.asin(Math.sqrt(Math.pow(Math.sin(a / 2), 2) + Math.cos(rad1) *
		Math.cos(
			rad2) * Math.pow(
			Math.sin(b / 2), 2)));
	s = s * 6378.137 * 1000;
	
	s = (Math.round(s * 10000) / 10000).toFixed(2);
	console.log(s)
	// s = s.toString();
	// s = s.substring(0, s.indexOf('.') + 2);
	
	return s
}

// 登录
export function userLogin() {
	let that = this;
	let promise = new Promise((resolve, reject) => {
		uni.login({
			provider: 'weixin',
			success: async function(loginRes) {
				let { code } = loginRes;
				let res = await that.$u.api.wxLogin({ code })
				if (res.code === 200) {
					resolve(res);
					// that.$store.commit('setToken', res.data.token)
					// that.$store.commit('setUserInfo', res.data.userResponse)
				} else {
					reject(err)
				}
			}
		});
	})
	return promise;
}

const LOCATION_NOTICE_STORAGE_KEY = 'location_permission_notice_shown'
const IMAGE_NOTICE_STORAGE_KEY = 'image_permission_notice_shown'

const DEFAULT_LOCATION_NOTICE = {
	title: '获取位置信息',
	content: '为了给您分配附近的订单，并计算接送货的精准距离与导航路线，本应用需要获取您的位置信息。',
	confirmText: '已知晓'
}

const DEFAULT_IMAGE_NOTICE = {
	title: '获取相机权限',
	content: '为了支持您进行司机身份认证，以及方便您在取送件时拍照留存凭证，本应用需要获取您的相机与相册权限。',
	confirmText: '已知晓'
}

export function ensureLocationPermissionNotice(modalOptions = {}) {
	const hasShown = uni.getStorageSync(LOCATION_NOTICE_STORAGE_KEY)
	if (hasShown) {
		return Promise.resolve(true)
	}

	const options = Object.assign({}, DEFAULT_LOCATION_NOTICE, modalOptions)

	return new Promise((resolve) => {
		uni.showModal({
			title: options.title,
			content: options.content,
			confirmText: options.confirmText,
			showCancel: false,
			success: (res) => {
				if (res.confirm) {
					uni.setStorageSync(LOCATION_NOTICE_STORAGE_KEY, true)
					resolve(true)
					return
				}
				resolve(false)
			},
			fail: () => {
				resolve(false)
			}
		})
	})
}

export function getLocationWithNotice(locationOptions = {}, modalOptions = {}) {
	return ensureLocationPermissionNotice(modalOptions).then((confirmed) => {
		if (!confirmed) {
			return Promise.reject({ errMsg: 'location permission notice canceled' })
		}

		return new Promise((resolve, reject) => {
			uni.getLocation(Object.assign({}, locationOptions, {
				success: (res) => {
					uni.$emit('locationPermissionGranted', res)
					if (typeof locationOptions.success === 'function') {
						locationOptions.success(res)
					}
					resolve(res)
				},
				fail: (err) => {
					if (typeof locationOptions.fail === 'function') {
						locationOptions.fail(err)
					}
					reject(err)
				}
			}))
		})
	})
}

export function ensureImagePermissionNotice(modalOptions = {}) {
	const hasShown = uni.getStorageSync(IMAGE_NOTICE_STORAGE_KEY)
	if (hasShown) {
		return Promise.resolve(true)
	}

	const options = Object.assign({}, DEFAULT_IMAGE_NOTICE, modalOptions)

	return new Promise((resolve) => {
		uni.showModal({
			title: options.title,
			content: options.content,
			confirmText: options.confirmText,
			showCancel: false,
			success: (res) => {
				if (res.confirm) {
					uni.setStorageSync(IMAGE_NOTICE_STORAGE_KEY, true)
					resolve(true)
					return
				}
				resolve(false)
			},
			fail: () => {
				resolve(false)
			}
		})
	})
}

export function chooseImageWithNotice(imageOptions = {}, modalOptions = {}) {
	return ensureImagePermissionNotice(modalOptions).then((confirmed) => {
		if (!confirmed) {
			return Promise.reject({ errMsg: 'image permission notice canceled' })
		}

		return new Promise((resolve, reject) => {
			uni.chooseImage(Object.assign({}, imageOptions, {
				success: (res) => {
					if (typeof imageOptions.success === 'function') {
						imageOptions.success(res)
					}
					resolve(res)
				},
				fail: (err) => {
					const errMsg = (err && err.errMsg) || ''
					if (errMsg && !/cancel/i.test(errMsg)) {
						uni.showToast({
							title: '需要授权相机权限',
							icon: 'none'
						})
					}
					if (typeof imageOptions.fail === 'function') {
						imageOptions.fail(err)
					}
					reject(err)
				}
			}))
		})
	})
}

export function checkLocationPermission() {
	return new Promise((resolve) => {
		if (typeof uni.getAppAuthorizeSetting === 'function') {
			try {
				const setting = uni.getAppAuthorizeSetting()
				const locationAuthorized = setting.locationAuthorized
				resolve(locationAuthorized === 'authorized' || locationAuthorized === 'authorizedAlways')
				return
			} catch (e) {
				console.log('getAppAuthorizeSetting fail', e)
			}
		}

		uni.getSetting({
			success: (res) => {
				const authSetting = res.authSetting || {}
				resolve(!!authSetting['scope.userLocation'])
			},
			fail: () => {
				resolve(false)
			}
		})
	})
}