"use client";

import * as React from "react";
import { gateLabelForStatus } from "@tasks/shared/convoy-lifecycle";
import type { ConvoyStatus } from "@tasks/shared/convoy-lifecycle";
import { Loader2 } from "lucide-react";

import { cn } from "@/lib/utils";
import { api } from "@/lib/trpc";

type ConvoyCard = {
  id: string;
  title: string;
  status: ConvoyStatus;
  content: { convoySlug: string; classification: string; successMetric: string } | null;
};

export function ConvoyKanban({
  workspaceSlug,
  selectedId,
  onSelect,
}: {
  workspaceSlug: string;
  selectedId: string | null;
  onSelect: (id: string) => void;
}) {
  const kanbanQuery = api.convoys.kanban.useQuery(
    { workspace: workspaceSlug },
    { enabled: Boolean(workspaceSlug) },
  );

  if (kanbanQuery.isLoading) {
    return (
      <div className="flex items-center gap-2 p-6 text-sm text-muted-foreground">
        <Loader2 className="size-4 animate-spin" />
        Loading kanban…
      </div>
    );
  }

  const columns = kanbanQuery.data?.columns ?? [];

  return (
    <div className="flex min-h-0 flex-1 gap-3 overflow-x-auto p-4">
      {columns.map((column) => (
        <div
          key={column.status}
          className="flex w-56 shrink-0 flex-col rounded-lg border border-border bg-muted/20"
        >
          <div className="border-b border-border px-3 py-2">
            <p className="text-xs font-semibold uppercase tracking-wide text-muted-foreground">
              {column.label}
            </p>
            <p className="text-[10px] text-muted-foreground">{column.convoys.length}</p>
          </div>
          <ul className="flex flex-1 flex-col gap-2 overflow-y-auto p-2">
            {column.convoys.map((convoy) => (
              <li key={convoy.id}>
                <button
                  type="button"
                  onClick={() => onSelect(convoy.id)}
                  className={cn(
                    "w-full rounded-md border border-border bg-background p-2 text-left text-sm transition-colors hover:bg-muted",
                    selectedId === convoy.id && "ring-2 ring-primary",
                  )}
                >
                  <p className="font-medium">{convoy.content?.convoySlug ?? convoy.title}</p>
                  {convoy.content?.classification && (
                    <p className="mt-0.5 text-[10px] text-muted-foreground">
                      {convoy.content.classification}
                    </p>
                  )}
                </button>
              </li>
            ))}
          </ul>
        </div>
      ))}
    </div>
  );
}

export function GateInbox({
  workspaceSlug,
  selectedId,
  onSelect,
}: {
  workspaceSlug: string;
  selectedId: string | null;
  onSelect: (id: string) => void;
}) {
  const kanbanQuery = api.convoys.kanban.useQuery(
    { workspace: workspaceSlug },
    { enabled: Boolean(workspaceSlug) },
  );

  const inbox = kanbanQuery.data?.gateInbox ?? [];

  return (
    <div className="border-b border-border p-4">
      <h2 className="text-sm font-semibold">Needs you</h2>
      <p className="text-xs text-muted-foreground">Gate 1, 2, and 3 approvals</p>
      {inbox.length === 0 ? (
        <p className="mt-3 text-sm text-muted-foreground">No pending gates.</p>
      ) : (
        <ul className="mt-3 space-y-2">
          {inbox.map((convoy: ConvoyCard) => (
            <li key={convoy.id}>
              <button
                type="button"
                onClick={() => onSelect(convoy.id)}
                className={cn(
                  "w-full rounded-md border border-amber-500/30 bg-amber-500/5 p-3 text-left text-sm hover:bg-amber-500/10",
                  selectedId === convoy.id && "ring-2 ring-amber-500",
                )}
              >
                <p className="font-medium">{convoy.content?.convoySlug ?? convoy.title}</p>
                <p className="text-xs text-amber-700 dark:text-amber-300">
                  {gateLabelForStatus(convoy.status)}
                </p>
              </button>
            </li>
          ))}
        </ul>
      )}
    </div>
  );
}