/* ============================================================
   jobStats.js — per-job pipeline stage counts (GET /job/stats/fetch).

   Live aggregation over inbox + manual upload + unpromoted sheet rows,
   deduped by email. Needs jobs.view or pipeline.view.
   ============================================================ */

import { request } from '../lib/apiClient'
import { toDate } from '../lib/format'
import { REQUISITION_STATUSES } from './jobs'

const REQ_STATUS_LABEL = Object.fromEntries(REQUISITION_STATUSES.map((s) => [s.value, s.label]))

/**
 * List or single-job stage counts.
 * Omit jobPostId for a paged list; pass jobPostId for one object.
 */
export function list({ jobPostId, search, ids, top, skip, activeOnly } = {}) {
  return request('/job/stats/fetch', {
    params: {
      job_post_id: jobPostId,
      search,
      ids: Array.isArray(ids) ? ids.join(',') : ids,
      top,
      skip,
      active_only: activeOnly,
    },
  })
}

/** Whole days from created_at to the browser clock. Null if timestamp missing. */
export function daysOpen(createdAt, now = Date.now()) {
  if (!createdAt) return null
  const start = toDate(createdAt)?.getTime()
  if (!Number.isFinite(start)) return null
  return Math.max(0, Math.floor((now - start) / 86_400_000))
}

/** API row -> what Progress cards and the table render. */
export function toJobStatsView(row) {
  const createdAt = row.created_at || null
  return {
    id: row.job_post_id,
    title: row.title || 'Untitled role',
    department: row.department || null,
    location: row.location || null,
    status: REQ_STATUS_LABEL[row.requisition_status] ?? row.requisition_status ?? '—',
    requisitionStatus: row.requisition_status,
    recruiterId: row.current_recruiter_id || null,
    recruiterName: row.recruiter_name || null,
    createdAt,
    daysOpen: daysOpen(createdAt),
    total: Number(row.total_applicants) || 0,
    shortlist: Number(row.shortlisting) || 0,
    screened: Number(row.screened) || 0,
    assessment: Number(row.assessment) || 0,
    interviewed: Number(row.interviewed) || 0,
    offered: Number(row.offered) || 0,
    onHold: Number(row.on_hold) || 0,
    rejected: Number(row.rejected) || 0,
    approved: Number(row.approved) || 0,
    hired: Number(row.hired) || 0,
    reapplied: Number(row.reapplied) || 0,
  }
}