import { request } from '../lib/apiClient'

/* ============================================================
   assignments.js — who owns a requisition, and who owns an application.

   Two parallel tables behind four routes (backend/job/app.py):
     job_assignments          — recruiter OR hiring manager on a JOB POST
     application_assignments  — a recruiter on ONE APPLICATION

   Rows are valid-time intervals: `valid_to === null` is the assignment in force
   now. Fetch defaults to current-only; pass currentOnly: false for the history
   log. Reassignment closes the previous open interval of the SAME role.

   Recruiter pickers use /tasks/assignees/fetch; hiring-manager pickers use
   /managers/fetch. Neither needs rbac_users.view. The current pointers also
   live on job_posts (current_recruiter_id, hiring_manager_id) and PATCH
   /jobs/update is the Jobs-screen write path.
   ============================================================ */

/** Current or historical owners of one requisition. */
export function listJob(jobPostId, { currentOnly, assignmentRole } = {}) {
  return request('/job/assignments/fetch', {
    params: {
      job_post_id: jobPostId,
      current_only: currentOnly,
      assignment_role: assignmentRole,
    },
  })
}

/** Assign a recruiter to a requisition. Supersedes whoever held it. */
export function assignJob({ jobPostId, userId, assignmentRole }) {
  return request('/job/assignments/create', {
    method: 'POST',
    body: {
      job_post_id: jobPostId,
      user_id: userId,
      assignment_role: assignmentRole || 'primary_recruiter',
    },
  })
}

/** Current recruiter(s) on one application. */
export function listApplication(inboxId) {
  return request('/candidate/assignments/fetch', { params: { inbox_id: inboxId } })
}

/** Assign a recruiter to one application. */
export function assignApplication({ inboxId, userId, assignmentRole }) {
  return request('/candidate/assignments/create', {
    method: 'POST',
    body: {
      inbox_id: inboxId,
      user_id: userId,
      assignment_role: assignmentRole || 'primary_recruiter',
    },
  })
}

/**
 * The serializers return `user_id` and nothing else about the person, so the
 * caller resolves names from the assignee list it already holds.
 */
export function toAssignmentView(row, namesById) {
  return {
    id: row.id,
    userId: row.user_id,
    name: row.user_name || namesById?.get(String(row.user_id)) || null,
    assignedByName: row.assigned_by_name ?? null,
    role: row.assignment_role || 'primary_recruiter',
    jobPostId: row.job_post_id ?? null,
    inboxId: row.inbox_id ?? null,
    validFrom: row.valid_from ? new Date(row.valid_from) : null,
    validTo: row.valid_to ? new Date(row.valid_to) : null,
    assignedBy: row.assigned_by ?? null,
  }
}