import type { CloudDetail } from '@/types/view-models'

export type AdminSection = 'dashboard' | 'review' | 'images' | 'users' | 'cloud-types'
export type ReviewStatus = CloudDetail['status']

export const statusMeta = {
    pending: { label: '待审核', type: 'warning' },
    approved: { label: '已通过', type: 'success' },
    rejected: { label: '已拒绝', type: 'error' },
} as const

export function formatDateTime(value: string | null) {
    if (!value) return '未记录'
    const date = new Date(value)
    return Number.isNaN(date.getTime())
        ? '未记录'
        : date.toLocaleString('zh-CN', {
              year: 'numeric',
              month: '2-digit',
              day: '2-digit',
              hour: '2-digit',
              minute: '2-digit',
          })
}

export function visibilityLabel(cloud: Pick<CloudDetail, 'status' | 'is_hidden'>) {
    if (cloud.is_hidden) return '用户隐藏'
    return cloud.status === 'approved' ? '公开可见' : '尚未公开'
}

export function serializeCsv(headers: string[], rows: unknown[][]) {
    const escape = (value: unknown) => {
        let text = String(value ?? '')
        // Spreadsheet programs interpret these prefixes as formulas, even inside quoted cells.
        if (/^[\s]*[=+@-]/.test(text) || /^[\t\r\n]/.test(text)) text = `'${text}`
        return `"${text.replaceAll('"', '""')}"`
    }
    return '\uFEFF' + [headers, ...rows].map(row => row.map(escape).join(',')).join('\r\n')
}

export function exportCsv(name: string, headers: string[], rows: unknown[][]) {
    const url = URL.createObjectURL(
        new Blob([serializeCsv(headers, rows)], { type: 'text/csv;charset=utf-8;' }),
    )
    const link = document.createElement('a')
    link.href = url
    link.download = `${name}-${new Date().toISOString().slice(0, 10)}.csv`
    link.click()
    setTimeout(() => URL.revokeObjectURL(url), 1000)
}