import { useState } from 'react'
import { useParams, useNavigate, Link } from 'react-router-dom'
import { AdminTable, type Column } from '../../components/admin/AdminTable'
import { RouteFormModal } from '../../components/admin/RouteFormModal'
import { DeleteConfirmModal } from '../../components/admin/DeleteConfirmModal'
import { useGame } from '../../hooks/useGames'
import {
  useCreateRoute,
  useUpdateRoute,
  useDeleteRoute,
  useReorderRoutes,
} from '../../hooks/useAdmin'
import type { Route as GameRoute, CreateRouteInput, UpdateRouteInput } from '../../types'

export function AdminGameDetail() {
  const { gameId } = useParams<{ gameId: string }>()
  const navigate = useNavigate()
  const id = Number(gameId)
  const { data: game, isLoading } = useGame(id)

  const createRoute = useCreateRoute(id)
  const updateRoute = useUpdateRoute(id)
  const deleteRoute = useDeleteRoute(id)
  const reorderRoutes = useReorderRoutes(id)

  const [showCreate, setShowCreate] = useState(false)
  const [editing, setEditing] = useState<GameRoute | null>(null)
  const [deleting, setDeleting] = useState<GameRoute | null>(null)

  if (isLoading) return <div className="py-8 text-center text-gray-500">Loading...</div>
  if (!game) return <div className="py-8 text-center text-gray-500">Game not found</div>

  const routes = game.routes ?? []

  const moveRoute = (route: GameRoute, direction: 'up' | 'down') => {
    const idx = routes.findIndex((r) => r.id === route.id)
    if (direction === 'up' && idx <= 0) return
    if (direction === 'down' && idx >= routes.length - 1) return

    const swapIdx = direction === 'up' ? idx - 1 : idx + 1
    const newRoutes = routes.map((r, i) => {
      if (i === idx) return { id: r.id, order: routes[swapIdx].order }
      if (i === swapIdx) return { id: r.id, order: routes[idx].order }
      return { id: r.id, order: r.order }
    })
    reorderRoutes.mutate(newRoutes)
  }

  const columns: Column<GameRoute>[] = [
    { header: 'Order', accessor: (r) => r.order, className: 'w-16' },
    { header: 'Name', accessor: (r) => r.name },
    {
      header: 'Actions',
      className: 'w-48',
      accessor: (r) => {
        const idx = routes.findIndex((rt) => rt.id === r.id)
        return (
          <div className="flex gap-2" onClick={(e) => e.stopPropagation()}>
            <button
              onClick={() => moveRoute(r, 'up')}
              disabled={idx === 0}
              className="text-gray-600 hover:text-gray-800 dark:text-gray-400 disabled:opacity-30 text-sm"
              title="Move up"
            >
              Up
            </button>
            <button
              onClick={() => moveRoute(r, 'down')}
              disabled={idx === routes.length - 1}
              className="text-gray-600 hover:text-gray-800 dark:text-gray-400 disabled:opacity-30 text-sm"
              title="Move down"
            >
              Down
            </button>
            <button
              onClick={() => setEditing(r)}
              className="text-blue-600 hover:text-blue-800 dark:text-blue-400 text-sm"
            >
              Edit
            </button>
            <button
              onClick={() => setDeleting(r)}
              className="text-red-600 hover:text-red-800 dark:text-red-400 text-sm"
            >
              Delete
            </button>
          </div>
        )
      },
    },
  ]

  return (
    <div>
      <nav className="text-sm mb-4 text-gray-500 dark:text-gray-400">
        <Link to="/admin/games" className="hover:underline">
          Games
        </Link>
        {' / '}
        <span className="text-gray-900 dark:text-gray-100">{game.name}</span>
      </nav>

      <div className="mb-6">
        <h2 className="text-xl font-semibold">{game.name}</h2>
        <p className="text-sm text-gray-500 dark:text-gray-400">
          {game.region} &middot; Gen {game.generation}
          {game.releaseYear ? ` \u00b7 ${game.releaseYear}` : ''}
        </p>
      </div>

      <div className="flex justify-between items-center mb-4">
        <h3 className="text-lg font-medium">Routes ({routes.length})</h3>
        <button
          onClick={() => setShowCreate(true)}
          className="px-4 py-2 text-sm font-medium rounded-md bg-blue-600 text-white hover:bg-blue-700"
        >
          Add Route
        </button>
      </div>

      <AdminTable
        columns={columns}
        data={routes}
        emptyMessage="No routes yet. Add one to get started."
        onRowClick={(r) => navigate(`/admin/games/${id}/routes/${r.id}`)}
        keyFn={(r) => r.id}
      />

      {showCreate && (
        <RouteFormModal
          nextOrder={routes.length > 0 ? Math.max(...routes.map((r) => r.order)) + 1 : 1}
          onSubmit={(data) =>
            createRoute.mutate(data as CreateRouteInput, {
              onSuccess: () => setShowCreate(false),
            })
          }
          onClose={() => setShowCreate(false)}
          isSubmitting={createRoute.isPending}
        />
      )}

      {editing && (
        <RouteFormModal
          route={editing}
          onSubmit={(data) =>
            updateRoute.mutate(
              { routeId: editing.id, data: data as UpdateRouteInput },
              { onSuccess: () => setEditing(null) },
            )
          }
          onClose={() => setEditing(null)}
          isSubmitting={updateRoute.isPending}
        />
      )}

      {deleting && (
        <DeleteConfirmModal
          title={`Delete ${deleting.name}?`}
          message="This will permanently delete the route. Routes with existing encounters cannot be deleted."
          onConfirm={() =>
            deleteRoute.mutate(deleting.id, {
              onSuccess: () => setDeleting(null),
            })
          }
          onCancel={() => setDeleting(null)}
          isDeleting={deleteRoute.isPending}
        />
      )}
    </div>
  )
}