import type { ReportMeta, ReportResult, WorksheetData, ForecastReportData, WeeklyActualData } from './types'

const BASE = '/reports/api'

async function request<T>(path: string, opts: RequestInit = {}): Promise<T> {
  const res = await fetch(`${BASE}${path}`, {
    credentials: 'include',
    headers: { 'Content-Type': 'application/json', ...opts.headers },
    ...opts,
  })
  if (res.status === 401) {
    ;(window.top ?? window).location.href = '/login'
    throw new Error('Unauthenticated')
  }
  if (!res.ok) {
    const err = await res.json().catch(() => ({ error: res.statusText }))
    throw new Error((err as { error?: string }).error || `Request failed: ${res.status}`)
  }
  return res.json()
}

export function fetchReports(): Promise<ReportMeta[]> {
  return request('/reports')
}

export function runReport(id: string, dateFrom: string, dateTo: string): Promise<ReportResult> {
  return request(`/reports/${encodeURIComponent(id)}/run`, {
    method: 'POST',
    body: JSON.stringify({ dateFrom, dateTo }),
  })
}

// ── Weekly Actuals API ──────────────────────────────────────────────────────

export function getWeeklyActual(weekEnding: string): Promise<WeeklyActualData> {
  return request<WeeklyActualData>(`/weekly-actual/${weekEnding}`)
}

// ── Directors Forecast API ──────────────────────────────────────────────────

export function dfGetWorksheet(year: number, month: number, dowAlign = true): Promise<WorksheetData> {
  return request<WorksheetData>(`/directors-forecast/worksheet/${year}/${month}?dow_align=${dowAlign}`)
}

export function dfSaveWorksheet(year: number, month: number, data: { pickup_avg_rate: number; overrides: object[] }): Promise<{ ok: boolean }> {
  return request<{ ok: boolean }>(`/directors-forecast/worksheet/${year}/${month}`, {
    method: 'PUT', body: JSON.stringify(data),
  })
}

export function dfGetReport(year: number, month: number, dowAlign = true): Promise<ForecastReportData> {
  return request<ForecastReportData>(`/directors-forecast/report/${year}/${month}?dow_align=${dowAlign}`)
}

export function dfSaveSnapshot(year: number, month: number, data: object) {
  return request(`/directors-forecast/report/${year}/${month}/snapshot`, {
    method: 'POST', body: JSON.stringify(data),
  })
}

export function dfDeleteSnapshot(year: number, month: number, id: number) {
  return request(`/directors-forecast/report/${year}/${month}/snapshot/${id}`, {
    method: 'DELETE',
  })
}

// ── Settings ──────────────────────────────────────────────────────────────────
export type AppSetting = { key: string; value: string; updated_at: string }

export function getSettings(): Promise<{ settings: AppSetting[] }> {
  return request('/settings')
}

export function saveSettings(settings: { key: string; value: string }[]): Promise<{ ok: boolean }> {
  return request('/settings', { method: 'PUT', body: JSON.stringify({ settings }) })
}