import { http, unwrapApiResponse, type ApiEnvelope } from '@/shared/api/http'
import type { ScheduleEvent } from './schedule'

export interface TripCalendarEntry {
  sourceType: 'TRIP_PLAN'
  tripNo: string
  status: string
  originWarehouseId: string | null
  originWarehouseCode: string | null
  originWarehouseName: string | null
  originCountryCode: string | null
  originTimezone: string | null
  originWarehouseStatus: string | null
  plannedDepartureAt: string | null
  expectedDriverEndAt: string | null
  departedAt: string | null
  completedAt: string | null
  stops: Array<{ name: string; address?: string | null; destinationKey?: string | null }>
  incompleteReasons: string[]
}
export interface TripCalendarResult { records: TripCalendarEntry[]; unresolvedRecords: TripCalendarEntry[] }
export const tripIssueLabels: Record<string, string> = {
  ORIGIN_WAREHOUSE_UNKNOWN: '起运仓资料缺失', ORIGIN_COUNTRY_UNKNOWN: '起运国家待核实',
  ORIGIN_TIMEZONE_UNKNOWN: '起运仓时区待核实', ROUTE_INCOMPLETE: '路线资料不完整',
  LOCAL_DATE_UNRESOLVED: '无法确定当地日期',
}
export function tripIssues(row: TripCalendarEntry) {
  return row.incompleteReasons.map(reason => tripIssueLabels[reason] || '资料待核实').join('；')
}
export function tripQueryWindow(range: { from: string; to: string }) {
  const start = Date.parse(`${range.from}T00:00:00Z`), end = Date.parse(`${range.to}T00:00:00Z`)
  if (!Number.isFinite(start) || !Number.isFinite(end) || end <= start || end - start > 42 * 86400000) throw new Error('日历日期范围无效')
  // Query all possible location dates, then place each record using its actual origin zone.
  return { from: new Date(start - 14 * 3600000).toISOString(), to: new Date(end + 14 * 3600000).toISOString() }
}
export async function listTripCalendar(range: { from: string; to: string }, signal?: AbortSignal) {
  return unwrapApiResponse(await http.get<ApiEnvelope<TripCalendarResult>, ApiEnvelope<TripCalendarResult>>(
    '/platform/v1/last-leg/fleet/trips/calendar', { params: tripQueryWindow(range), signal },
  ))
}
const formatters = new Map<string, Intl.DateTimeFormat>()
function localStamp(value: string | null, zone: string | null) {
  if (!value || !/(Z|[+-]\d{2}:\d{2})$/.test(value) || !zone?.includes('/') || /^(Etc|SystemV)\//.test(zone)) return null
  const instant = new Date(value)
  if (!Number.isFinite(instant.getTime())) return null
  try {
    let formatter = formatters.get(zone)
    if (!formatter) {
      formatter = new Intl.DateTimeFormat('en-CA', { timeZone: zone, year: 'numeric', month: '2-digit', day: '2-digit', hour: '2-digit', minute: '2-digit', hourCycle: 'h23' })
      formatters.set(zone, formatter)
    }
    const parts = Object.fromEntries(formatter.formatToParts(instant).map(part => [part.type, part.value]))
    return { date: `${parts.year}-${parts.month}-${parts.day}`, time: `${parts.hour}:${parts.minute}` }
  } catch { return null }
}
export function projectTripCalendar(result: TripCalendarResult, range: { from: string; to: string }) {
  const events: ScheduleEvent[] = [], unresolved = [...result.unresolvedRecords]
  const labels: Record<string, string> = { PLANNED: '计划中', IN_TRANSIT: '运输中', COMPLETED: '货物已结案', CANCELLED: '已取消' }
  for (const row of new Map(result.records.map(row => [row.tripNo, row])).values()) {
    if (row.status === 'CANCELLED') continue
    // Executed work stays on its actual local date even if the plan changes later.
    const occurrence = localStamp(row.departedAt ?? row.plannedDepartureAt, row.originTimezone)
    if (row.originCountryCode !== 'US' || !occurrence) {
      unresolved.push({ ...row, incompleteReasons: [...row.incompleteReasons, 'LOCAL_DATE_UNRESOLVED'] }); continue
    }
    if (occurrence.date < range.from || occurrence.date >= range.to) continue
    const actual = localStamp(row.departedAt, row.originTimezone)
    const driverEnd = localStamp(row.expectedDriverEndAt, row.originTimezone)
    events.push({ key: `trip-${row.tripNo}`, type: 'dispatch', date: occurrence.date, time: occurrence.time,
      title: `${row.tripNo} ${row.departedAt ? '实际发车' : '排车'}`, subtitle: row.departedAt ? '按起运仓当地实际发车时间展示' : '海外仓送往 FBA／客户仓的车辆安排',
      sourcePath: `/overseas-master-data/trips/${encodeURIComponent(row.tripNo)}`,
      fields: [
        { label: '车次状态', value: labels[row.status] || '待核实' },
        { label: '起运仓', value: row.originWarehouseName || row.originWarehouseCode },
        { label: '地点时区', value: row.originTimezone },
        { label: '计划出发（UTC）', value: row.plannedDepartureAt },
        { label: '路线', value: row.stops.slice(0, 3).map(stop => stop.name).join(' → ') + (row.stops.length > 3 ? ` 等${row.stops.length}站` : '') },
        { label: '实际出发', value: actual ? `${actual.date} ${actual.time}` : row.departedAt ? '时刻待核实' : '尚未记录' },
        { label: '预计司机结束', value: driverEnd ? `${driverEnd.date} ${driverEnd.time}` : '待核实' },
        { label: '资料提示', value: tripIssues(row) },
      ].filter(field => field.value),
    })
  }
  return { events, unresolved }
}