export const dynamic = 'force-dynamic'

import Link from 'next/link'
import { createClient } from '@/lib/supabase/server'
import { redirect } from 'next/navigation'
import { StatCard } from '@/components/dashboard/stat-card'

const STATUS_LABELS: Record<string, string> = {
  open: 'Open',
  in_progress: 'In Progress',
  overdue: 'Overdue',
  pending_verification: 'Pending Verification',
  verified: 'Verified',
  reopened: 'Reopened',
  closed: 'Closed',
}

const STATUS_COLORS: Record<string, string> = {
  open: 'bg-gray-100 text-gray-700',
  in_progress: 'bg-blue-100 text-blue-700',
  overdue: 'bg-red-100 text-red-700',
  pending_verification: 'bg-purple-100 text-purple-700',
  verified: 'bg-green-100 text-green-700',
  reopened: 'bg-orange-100 text-orange-700',
  closed: 'bg-gray-100 text-gray-500',
}

export default async function CapaOwnerPage() {
  const supabase = await createClient()
  const { data: { user } } = await supabase.auth.getUser()
  if (!user) redirect('/login')

  const { data: profile } = await supabase.from('users').select('name, role').eq('id', user.id).single()
  if (!profile || !['capa_owner', 'admin', 'hse', 'supervisor'].includes(profile.role)) redirect('/')

  const { data: capas } = await supabase
    .from('capa_actions')
    .select('id, description, due_date, priority, status, incident_id, incidents (reference_no)')
    .eq('owner_user_id', user.id)
    .order('due_date', { ascending: true, nullsFirst: false })

  const rows = capas ?? []
  const openCount = rows.filter(c => ['open', 'in_progress', 'reopened'].includes(c.status)).length
  const overdueCount = rows.filter(c => c.status === 'overdue').length
  const doneCount = rows.filter(c => ['verified', 'closed'].includes(c.status)).length

  const PRIORITY_COLORS: Record<string, string> = {
    high: 'text-red-600 font-semibold',
    med: 'text-orange-500 font-medium',
    low: 'text-gray-400',
  }

  const activeRows = rows.filter(c => !['verified', 'closed'].includes(c.status))
  const doneRows = rows.filter(c => ['verified', 'closed'].includes(c.status))

  return (
    <main className="max-w-4xl mx-auto px-4 py-6">
      <h1 className="text-2xl font-bold text-gray-900 mb-6">My CAPAs</h1>

      <div className="grid grid-cols-3 gap-4 mb-6">
        <StatCard label="Active" value={openCount} accent={openCount > 0 ? 'yellow' : 'green'} />
        <StatCard label="Overdue" value={overdueCount} accent={overdueCount > 0 ? 'red' : 'green'} />
        <StatCard label="Completed" value={doneCount} accent="green" />
      </div>

      {activeRows.length === 0 ? (
        <div className="bg-white rounded-xl shadow-sm p-8 text-center">
          <p className="text-gray-400 text-sm">No active CAPAs assigned to you.</p>
        </div>
      ) : (
        <div className="bg-white rounded-xl shadow-sm divide-y divide-gray-50">
          {activeRows.map(capa => {
            const incRef = (capa.incidents as unknown as { reference_no: string | null } | null)?.reference_no
            const isOverdue = capa.status === 'overdue'
            return (
              <div key={capa.id} className={`p-4 ${isOverdue ? 'bg-red-50' : ''}`}>
                <div className="flex items-start justify-between gap-4">
                  <div className="flex-1 min-w-0">
                    <p className="text-sm text-gray-800">{capa.description}</p>
                    {incRef && (
                      <Link href={`/hse/incidents/${capa.incident_id}`} className="text-xs text-blue-600 hover:underline mt-0.5 block">
                        {incRef}
                      </Link>
                    )}
                  </div>
                  <div className="shrink-0 text-right">
                    <span className={`text-xs rounded-full px-2 py-0.5 ${STATUS_COLORS[capa.status] ?? 'bg-gray-100 text-gray-600'}`}>
                      {STATUS_LABELS[capa.status] ?? capa.status}
                    </span>
                    <p className={`text-xs mt-1 ${isOverdue ? 'text-red-600 font-semibold' : 'text-gray-400'}`}>
                      {capa.due_date ? `Due ${new Date(capa.due_date as string).toLocaleDateString('en-MY')}` : 'No due date'}
                    </p>
                    {capa.priority && (
                      <p className={`text-xs mt-0.5 ${PRIORITY_COLORS[capa.priority as string] ?? ''}`}>
                        {(capa.priority as string).toUpperCase()} priority
                      </p>
                    )}
                  </div>
                </div>
              </div>
            )
          })}
        </div>
      )}

      {doneRows.length > 0 && (
        <div className="mt-6">
          <h2 className="text-xs font-semibold text-gray-400 uppercase tracking-wide mb-2">Completed ({doneCount})</h2>
          <div className="bg-white rounded-xl shadow-sm divide-y divide-gray-50 opacity-60">
            {doneRows.map(capa => (
              <div key={capa.id} className="p-4 flex items-center justify-between">
                <p className="text-sm text-gray-500 line-clamp-1">{capa.description}</p>
                <span className={`text-xs rounded-full px-2 py-0.5 ml-4 shrink-0 ${STATUS_COLORS[capa.status] ?? 'bg-gray-100'}`}>
                  {STATUS_LABELS[capa.status] ?? capa.status}
                </span>
              </div>
            ))}
          </div>
        </div>
      )}
    </main>
  )
}