import { ArrowLeft, CheckCircle2, MapPin, Printer } from 'lucide-react'
import { Link, useLocation, useParams } from 'react-router-dom'
import { SeverityLabel, StatusBadge } from '../components/Badges'
import { ActionsSection } from '../components/incident/ActionsSection'
import { ActivitySection } from '../components/incident/ActivitySection'
import { AttachmentsSection } from '../components/incident/AttachmentsSection'
import { DetailsSection } from '../components/incident/DetailsSection'
import { InvestigationSection } from '../components/incident/InvestigationSection'
import { WorkflowPanel } from '../components/incident/WorkflowPanel'
import { Page } from '../components/Page'
import { ErrorMessage, Loading } from '../components/QueryState'
import { secondaryButton } from '../components/styles'
import { ApiError } from '../lib/api'
import { formatDateTime } from '../lib/dates'
import { incidentTypeLabel } from '../lib/labels'
import { useIncident } from '../lib/queries'

export function IncidentDetail() {
  const number = Number(useParams().number)
  const location = useLocation()
  const query = useIncident(number)
  const incident = query.data

  if (query.isPending) return <Loading />
  if (!incident) {
    return (
      <Page>
        {query.error instanceof ApiError && query.error.status === 404 ? (
          <p className="text-sm text-muted">
            This incident doesn’t exist or you don’t have access to it.{' '}
            <Link to="/incidents" className="text-coral underline">
              Back to incidents
            </Link>
          </p>
        ) : (
          <ErrorMessage error={query.error} />
        )}
      </Page>
    )
  }

  const justReported = (location.state as { justReported?: boolean } | null)?.justReported

  return (
    <Page>
      <Link to="/incidents" className="mb-4 inline-flex items-center gap-1 text-2xs font-semibold text-muted hover:text-ink print:hidden">
        <ArrowLeft size={14} /> All incidents
      </Link>
      {justReported && (
        <div className="mb-5 flex items-start gap-2 rounded-md bg-mint-soft px-4 py-3 text-xs text-[#2b6e4f] print:hidden" role="status">
          <CheckCircle2 size={16} className="mt-px flex-none" />
          <span>
            <strong>Thanks, {incident.reference} has been reported.</strong> The safety team has been notified{incident.severity === 'high' || incident.severity === 'critical' ? ' straight away' : ''}.
          </span>
        </div>
      )}

      <div className="mb-6 flex flex-col gap-4 sm:flex-row sm:items-start sm:justify-between">
        <div>
          <span className="font-mono text-3xs font-medium tracking-[0.09em] text-[#8da29b] uppercase">
            {incident.reference} · {incidentTypeLabel[incident.type]}
          </span>
          <h1 className="mt-1.5 mb-3 font-display text-[26px] leading-tight font-semibold tracking-[-0.5px] text-ink sm:text-[30px]">{incident.title}</h1>
          <div className="flex flex-wrap items-center gap-x-4 gap-y-2 text-2xs text-body">
            <StatusBadge status={incident.status} />
            <SeverityLabel severity={incident.severity} />
            <span className="inline-flex items-center gap-1">
              <MapPin size={13} />
              {[incident.site.name, incident.area?.name].filter(Boolean).join(' · ')}
            </span>
            <span>Occurred {formatDateTime(incident.occurredAt)}</span>
            <span>
              Reported by {incident.anonymous ? 'anonymous' : (incident.reporter?.name ?? incident.reporterName ?? 'former user')}
              {incident.kiosk && ` via ${incident.kiosk.name}`} · {formatDateTime(incident.reportedAt)}
            </span>
          </div>
        </div>
        <button type="button" className={`${secondaryButton} flex-none print:hidden`} onClick={() => window.print()}>
          <Printer size={16} /> Print / PDF
        </button>
      </div>

      <div className="grid gap-5 lg:grid-cols-[minmax(0,1fr)_320px] print:block">
        <div className="min-w-0 space-y-5">
          <DetailsSection incident={incident} />
          <InvestigationSection incident={incident} />
          <ActionsSection incident={incident} />
          <ActivitySection incident={incident} />
        </div>
        <div className="space-y-5 print:mt-5">
          <div className="print:hidden">
            <WorkflowPanel incident={incident} />
          </div>
          <AttachmentsSection incident={incident} />
        </div>
      </div>
    </Page>
  )
}