/* ============================================================
   Suggested-role picker — shared by Job Matching and Recruitment Inbox.

   JobCard is the AI/manual radiogroup row. PickRoleModal is the "choose a
   different role" search popup. Requirement chips light green when the
   resume text contains them (client-side substring, same as Matching).
   ============================================================ */

import { useState } from 'react'
import { useQuery } from '@tanstack/react-query'

import Modal from './Modal'
import { Badge, EmptyState, Icon, ScoreChip } from './primitives'
import { friendlyAuthError } from '../lib/errors'
import { qk } from '../lib/queryKeys'
import * as jobPostsApi from '../api/jobPosts'

/** Requirement chip lights green when the resume text contains it (client-side). */
export function reqInResume(req, resumeText) {
  if (!req || !resumeText) return false
  const needle = (typeof req === 'string' ? req : (req?.name || req?.label || '')).trim().toLowerCase()
  if (!needle) return false
  return resumeText.toLowerCase().includes(needle)
}

function reqLabel(req) {
  if (req == null) return ''
  if (typeof req === 'string' || typeof req === 'number') return String(req)
  if (typeof req === 'object') return String(req.name || req.label || req.skill || '')
  return String(req)
}

export function JobCard({ post, rank, selected, onSelect, resumeText, manual, badge }) {
  const unavailable = Boolean(post?.unavailable) || !post?.title
  const title = post?.title || 'Unavailable'
  const meta = [
    post?.employment_type,
    post?.location,
    post?.experience_min != null || post?.experience_max != null
      ? `${post?.experience_min ?? '?'}–${post?.experience_max ?? '?'} yrs`
      : null,
  ].filter(Boolean).join(' · ')
  const tag = badge ?? (manual ? 'Manual' : `AI #${rank}`)

  return (
    <div
      role="radio"
      aria-checked={selected}
      tabIndex={0}
      className="list-row"
      onClick={() => !unavailable && onSelect(post.id)}
      onKeyDown={(e) => {
        if (unavailable) return
        if (e.key === 'Enter' || e.key === ' ') {
          e.preventDefault()
          onSelect(post.id)
        }
      }}
      style={{
        cursor: unavailable ? 'not-allowed' : 'pointer',
        opacity: unavailable ? 0.55 : 1,
        borderColor: selected ? 'var(--primary)' : undefined,
        boxShadow: selected ? 'var(--ring)' : undefined,
        marginBottom: 8,
        alignItems: 'flex-start',
      }}
    >
      <div className="lr-main" style={{ minWidth: 0 }}>
        <div className="flex items-center gap-8" style={{ marginBottom: 4, flexWrap: 'wrap' }}>
          <span className="tag">{tag}</span>
          <div className="lr-title">{title}</div>
          {unavailable ? (
            <Badge className="b-gray">Unavailable</Badge>
          ) : (
            <Badge>{post.status || 'draft'}</Badge>
          )}
          {post?.overall_score != null && <ScoreChip score={post.overall_score} />}
          {selected && <Icon name="check-circle" />}
        </div>
        {meta && <div className="cell-sub">{meta}</div>}
        {!unavailable && Array.isArray(post.requirements) && post.requirements.length > 0 && (
          <div className="k-tags" style={{ marginTop: 8 }}>
            {post.requirements.slice(0, 8).map((req, i) => {
              const label = reqLabel(req)
              if (!label) return null
              const hit = reqInResume(req, resumeText)
              return (
                <span
                  key={`${label}-${i}`}
                  className="tag"
                  style={hit ? {
                    background: 'var(--success-soft)',
                    color: 'var(--success-fg)',
                  } : undefined}
                >
                  {label}
                </span>
              )
            })}
          </div>
        )}
      </div>
    </div>
  )
}

export function PickRoleModal({ onClose, onPick }) {
  const [q, setQ] = useState('')
  const { data = [], isPending, isError, error } = useQuery({
    queryKey: qk.jobPosts.list({ search: q || undefined, top: 30 }),
    queryFn: async () => {
      const res = await jobPostsApi.list({ search: q || undefined, top: 30 })
      return Array.isArray(res?.data) ? res.data : []
    },
  })

  return (
    <Modal
      title="Choose a different role"
      subtitle="Search open job posts"
      size="modal-lg"
      onClose={onClose}
      footer={<button className="btn btn-secondary" onClick={onClose}>Cancel</button>}
    >
      <div className="toolbar-search" style={{ maxWidth: 'none', marginBottom: 14 }}>
        <Icon name="search" />
        <input value={q} onChange={(e) => setQ(e.target.value)} placeholder="Search title or location…" autoFocus />
      </div>
      {isPending && <EmptyState icon="briefcase" title="Loading…">Fetching job posts.</EmptyState>}
      {isError && (
        <EmptyState icon="alert" title="Couldn’t load roles">
          {friendlyAuthError(error, 'Request failed')}
        </EmptyState>
      )}
      {!isPending && !isError && data.length === 0 && (
        <EmptyState icon="briefcase" title="No roles found">Try a different search.</EmptyState>
      )}
      <div className="list-tight">
        {data.map((p) => (
          <div
            key={p.id}
            className="list-row"
            style={{ cursor: 'pointer' }}
            onClick={() => { onPick(p); onClose() }}
          >
            <div className="lr-main">
              <div className="lr-title">{p.title}</div>
              <div className="lr-sub">
                {[p.employment_type, p.location].filter(Boolean).join(' · ') || '—'}
              </div>
            </div>
            <Badge>{p.status}</Badge>
          </div>
        ))}
      </div>
    </Modal>
  )
}