import supa from '@/components/supadb/aksupainstance.uts'

export type AnalyticsReport = {
  id: string
  title: string
  type: string
  period: string
  generated_at: string
  description: string
}

export type AnalyticsReportMetric = {
  key: string
  label: string
  value: number
  format: string
  icon: string
  color: string
  change: number
}

export type AnalyticsReportRow = {
  row_date: string
  gmv: number
  orders: number
  users: number
  conversion: number
  avg_order_amount: number
}

export type AnalyticsInsight = {
  id: string
  type: string
  title: string
  content: string
  impact: string
}

export type AnalyticsRelatedReport = AnalyticsReport

function safeNumber(v: any): number {
  const n = Number(v)
  return isFinite(n) ? n : 0
}

export async function fetchReport(reportId: string): Promise<AnalyticsReport | null> {
  const reportRes: any = await supa
    .from('analytics_reports')
    .select('id, title, type, period, generated_at, description')
    .eq('id', reportId)

  if (reportRes?.error != null) throw reportRes.error

  const rows: Array<any> = Array.isArray(reportRes.data) ? (reportRes.data as Array<any>) : []
  if (rows.length === 0) return null
  const r = rows[0]
  return {
    id: `${r.id}`,
    title: `${r.title}`,
    type: `${r.type}`,
    period: `${r.period}`,
    generated_at: `${r.generated_at}`,
    description: `${r.description || ''}`
  }
}

export async function fetchReportMetrics(reportId: string): Promise<Array<AnalyticsReportMetric>> {
  const metricRes: any = await supa
    .from('analytics_report_metrics')
    .select('metric_key, metric_label, metric_value_num, format, icon, color, change_pct')
    .eq('report_id', reportId)

  if (metricRes?.error != null) throw metricRes.error

  const metricRows: Array<any> = Array.isArray(metricRes.data) ? (metricRes.data as Array<any>) : []
  return metricRows.map((m: any) => ({
    key: `${m.metric_key}`,
    label: `${m.metric_label}`,
    value: safeNumber(m.metric_value_num),
    format: `${m.format || 'number'}`,
    icon: `${m.icon || '📊'}`,
    color: `${m.color || '#4caf50'}`,
    change: safeNumber(m.change_pct)
  }))
}

export async function fetchReportRows(reportId: string): Promise<Array<AnalyticsReportRow>> {
  const rowsRes: any = await supa
    .from('analytics_report_rows')
    .select('row_date, gmv, orders, users, conversion, avg_order_amount')
    .eq('report_id', reportId)
    .order('row_date', { ascending: true } as any)

  if (rowsRes?.error != null) throw rowsRes.error

  const rows: Array<any> = Array.isArray(rowsRes.data) ? (rowsRes.data as Array<any>) : []
  return rows.map((row: any) => ({
    row_date: `${row.row_date}`,
    gmv: safeNumber(row.gmv),
    orders: safeNumber(row.orders),
    users: safeNumber(row.users),
    conversion: safeNumber(row.conversion),
    avg_order_amount: safeNumber(row.avg_order_amount)
  }))
}

export async function fetchReportInsights(reportId: string): Promise<Array<AnalyticsInsight>> {
  const insightRes: any = await supa
    .from('analytics_insights')
    .select('id, type, title, content, impact')
    .eq('report_id', reportId)
    .order('created_at', { ascending: false } as any)

  if (insightRes?.error != null) throw insightRes.error

  const insRows: Array<any> = Array.isArray(insightRes.data) ? (insightRes.data as Array<any>) : []
  return insRows.map((it: any) => ({
    id: `${it.id}`,
    type: `${it.type || 'info'}`,
    title: `${it.title}`,
    content: `${it.content}`,
    impact: `${it.impact || 'medium'}`
  }))
}

export async function fetchRelatedReports(reportType: string, excludeReportId: string): Promise<Array<AnalyticsRelatedReport>> {
  const relatedRes: any = await supa
    .from('analytics_reports')
    .select('id, title, type, period, generated_at, description')
    .eq('type', reportType)
    .neq('id', excludeReportId)
    .order('generated_at', { ascending: false } as any)
    .limit(3 as any)

  if (relatedRes?.error != null) throw relatedRes.error

  const relRows: Array<any> = Array.isArray(relatedRes.data) ? (relatedRes.data as Array<any>) : []
  return relRows.map((it: any) => ({
    id: `${it.id}`,
    title: `${it.title}`,
    type: `${it.type}`,
    period: `${it.period}`,
    generated_at: `${it.generated_at}`,
    description: `${it.description || ''}`
  }))
}