import type { StudentAlert, StudentHomeMetrics, StudentHomeProfile } from '../api/student'

// 仅在本次登录会话内缓存首页学生资料，切换一级页面时不重复请求。
export const homeStudentProfile = ref<StudentHomeProfile | null>(null)
export const homeStudentMetrics = ref<StudentHomeMetrics | null>(null)
export const homeStudentAlerts = ref<StudentAlert[] | null>(null)

export function setHomeStudentProfile(profile: StudentHomeProfile) {
	const userInfo = uni.getStorageSync('userInfo') as { userId?: string } | null
	const boundStudent = userInfo?.userId
		? uni.getStorageSync(`selectedStudent_${userInfo.userId}`) as { id?: string, name?: string, account?: string, grade?: string, school?: string, className?: string, avatar?: string } | null
		: null
	const currentProfile = homeStudentProfile.value?.id === profile.id ? homeStudentProfile.value : null
	const savedStudent = boundStudent?.id === profile.id ? boundStudent : null
	homeStudentProfile.value = {
		...profile,
		name: savedStudent?.name ?? currentProfile?.name ?? profile.name,
		account: savedStudent?.account ?? currentProfile?.account ?? profile.account,
		grade: savedStudent?.grade ?? currentProfile?.grade ?? profile.grade,
		school: savedStudent?.school ?? currentProfile?.school ?? profile.school,
		className: savedStudent?.className ?? currentProfile?.className ?? profile.className,
		avatar: savedStudent?.avatar ?? currentProfile?.avatar ?? profile.avatar
	}
}

export function saveSelectedStudent(student: { id: string, name: string, account: string, grade: string, school: string, className: string, avatar: string }) {
	const userInfo = uni.getStorageSync('userInfo') as { userId?: string } | null
	if (userInfo?.userId) uni.setStorageSync(`selectedStudent_${userInfo.userId}`, student)
}

export function getSavedSelectedStudent(): { id: string, name: string, account: string, grade: string, school: string, className: string, avatar: string } | null {
	const userInfo = uni.getStorageSync('userInfo') as { userId?: string } | null
	if (!userInfo?.userId) return null
	return uni.getStorageSync(`selectedStudent_${userInfo.userId}`) as { id: string, name: string, account: string, grade: string, school: string, className: string, avatar: string } | null
}

export function applyBoundStudent(student: { id: string, name: string, account: string, grade: string, school: string, className: string, avatar: string }) {
	const comprehensiveLevel = homeStudentProfile.value?.id === student.id ? homeStudentProfile.value.comprehensiveLevel : 'good'
	setHomeStudentProfile({ ...student, comprehensiveLevel })
}

export function setHomeStudentMetrics(metrics: StudentHomeMetrics) {
	homeStudentMetrics.value = metrics
}

export function setHomeStudentAlerts(alerts: StudentAlert[]) {
	homeStudentAlerts.value = alerts
}

export function clearHomeStudentProfile() {
	homeStudentProfile.value = null
	homeStudentMetrics.value = null
	homeStudentAlerts.value = null
}