/**
 * 太阳码 / 扫码进入参数解析（冷启动 onLoad + 热启动 App.onShow 共用）
 */

/** 微信「扫小程序码 / 长按识别 / 相册选取」等进入场景值 */
export const SCAN_ENTRY_SCENES = [1011, 1012, 1013, 1047, 1048, 1049]

/**
 * 解析 scene 字符串为键值对，如 s=123&a=456&id=789
 */
export function parseSceneString(sceneRaw) {
	if (!sceneRaw) {
		return {}
	}
	const scene = decodeURIComponent(String(sceneRaw))
	const params = {}
	scene.split('&').forEach((pair) => {
		if (!pair) {
			return
		}
		const eq = pair.indexOf('=')
		if (eq === -1) {
			params[pair] = ''
			return
		}
		const key = pair.slice(0, eq)
		const val = pair.slice(eq + 1)
		if (key) {
			params[key] = val != null ? decodeURI(val) : ''
		}
	})
	return params
}

/**
 * 将 scene 内字段展开为页面 query（account / hdId / id 等）
 */
export function sceneParamsToQuery(sceneParams, baseQuery) {
	const q = Object.assign({}, baseQuery || {})
	if (sceneParams.s) {
		q.account = sceneParams.s
	}
	if (sceneParams.a) {
		if (!q.account) {
			q.account = sceneParams.a
		}
		q.staffId = sceneParams.a
	}
	if (sceneParams.id) {
		q.id = sceneParams.id
	}
	if (sceneParams.hdId) {
		q.hdId = sceneParams.hdId
	}
	delete q.scene
	return q
}

/**
 * 合并 onLoad 的 option：scene 展开 + 普通二维码 q 参数
 */
export function applyLaunchQuery(option) {
	const merged = Object.assign({}, option || {})
	if (merged.scene) {
		const sceneParams = parseSceneString(merged.scene)
		Object.assign(merged, sceneParamsToQuery(sceneParams, merged))
		delete merged.scene
	}
	if (merged.q) {
		const currentUrl = decodeURIComponent(String(merged.q))
		const marker = 'account='
		const idx = currentUrl.lastIndexOf(marker)
		if (idx >= 0) {
			let account = currentUrl.substring(idx + marker.length)
			const amp = account.indexOf('&')
			if (amp >= 0) {
				account = account.substring(0, amp)
			}
			merged.account = account
		}
	}
	return merged
}

/**
 * 拼 reLaunch 地址
 */
export function buildLaunchUrl(path, query) {
	const normalizedPath = path && path.indexOf('/') === 0 ? path : '/' + (path || '')
	const parts = []
	const q = query || {}
	Object.keys(q).forEach((key) => {
		const val = q[key]
		if (val !== undefined && val !== null && val !== '') {
			parts.push(key + '=' + encodeURIComponent(val))
		}
	})
	return parts.length ? normalizedPath + '?' + parts.join('&') : normalizedPath
}

/**
 * 写入 account / hdId / currentQuery（与原 globalMixins 一致）
 */
export function persistLaunchStorage(option) {
	if (option.account) {
		uni.setStorageSync('account', option.account)
	} else {
		uni.setStorageSync('account', 0)
	}
	if (option.hdId) {
		uni.setStorageSync('hdId', option.hdId)
	} else {
		uni.setStorageSync('hdId', 0)
	}
	uni.setStorageSync('currentQuery', JSON.stringify(option))
}

/** 分享邀请人 customId 的 storage key（按门店隔离） */
export function getShareInviterStorageKey(account) {
	const shopId = account || uni.getStorageSync('account') || ''
	return shopId ? 'shareInviter_' + shopId : ''
}

/**
 * 缓存分享链接中的邀请人 xhCustom.id，供注册后拉新绑定
 */
export function persistShareInviter(option) {
	const inviterCustomId = option && option.inviterCustomId ? Number(option.inviterCustomId) : 0
	const account = option && option.account ? option.account : uni.getStorageSync('account')
	const key = getShareInviterStorageKey(account)
	if (!key || inviterCustomId <= 0) {
		return
	}
	uni.setStorageSync(key, inviterCustomId)
}

/** 读取当前门店缓存的邀请人 ID */
export function getShareInviterCustomId(account) {
	const key = getShareInviterStorageKey(account)
	if (!key) {
		return 0
	}
	const val = uni.getStorageSync(key)
	return val ? Number(val) : 0
}

/** 绑定成功后清除邀请人缓存 */
export function clearShareInviter(account) {
	const key = getShareInviterStorageKey(account)
	if (key) {
		uni.removeStorageSync(key)
	}
}

/**
 * 热启动：根据 getEnterOptionsSync 判断是否需要 reLaunch 到展开 query 的目标页
 * @returns {boolean} 是否已触发 reLaunch
 */
export function tryReLaunchFromScanEnter(globalData) {
	if (!uni.getEnterOptionsSync) {
		return false
	}
	const enter = uni.getEnterOptionsSync()
	if (!enter || !enter.query || !enter.query.scene) {
		return false
	}

	const launchKey = (enter.path || '') + '|' + enter.query.scene
	const sceneCode = Number(enter.scene)
	const isScanEntry = SCAN_ENTRY_SCENES.indexOf(sceneCode) >= 0

	if (!isScanEntry && globalData.lastLaunchKey === launchKey) {
		return false
	}

	const sceneParams = parseSceneString(enter.query.scene)
	const expandedQuery = sceneParamsToQuery(sceneParams, Object.assign({}, enter.query))
	const targetUrl = buildLaunchUrl(enter.path, expandedQuery)
	const targetRoute = (enter.path || '').replace(/^\//, '')

	const pages = getCurrentPages()
	const current = pages.length ? pages[pages.length - 1] : null
	if (current) {
		const curRoute = current.route || ''
		const curOpts = current.options || {}
		// 已在目标页且参数已展开（无 scene），无需重复 reLaunch
		if (curRoute === targetRoute && !curOpts.scene && (curOpts.account || curOpts.id || curOpts.hdId)) {
			globalData.lastLaunchKey = launchKey
			return false
		}
	}

	globalData.lastLaunchKey = launchKey
	uni.reLaunch({ url: targetUrl })
	return true
}