"use client";

export const dynamic = "force-dynamic";

import { useMemo, useState } from "react";
import Link from "next/link";
import { useRouter } from "next/navigation";

import { SignedIn, SignedOut, useAuth } from "@/auth/clerk";

import { ApiError } from "@/api/mutator";
import { useCreateBoardApiV1BoardsPost } from "@/api/generated/boards/boards";
import {
  type listBoardGroupsApiV1BoardGroupsGetResponse,
  useListBoardGroupsApiV1BoardGroupsGet,
} from "@/api/generated/board-groups/board-groups";
import {
  type listGatewaysApiV1GatewaysGetResponse,
  useListGatewaysApiV1GatewaysGet,
} from "@/api/generated/gateways/gateways";
import { useOrganizationMembership } from "@/lib/use-organization-membership";
import type { BoardGroupRead } from "@/api/generated/model";
import { AdminOnlyNotice } from "@/components/auth/AdminOnlyNotice";
import { SignedOutPanel } from "@/components/auth/SignedOutPanel";
import { DashboardSidebar } from "@/components/organisms/DashboardSidebar";
import { DashboardShell } from "@/components/templates/DashboardShell";
import { Button } from "@/components/ui/button";
import { Input } from "@/components/ui/input";
import SearchableSelect from "@/components/ui/searchable-select";

const slugify = (value: string) =>
  value
    .toLowerCase()
    .trim()
    .replace(/[^a-z0-9]+/g, "-")
    .replace(/(^-|-$)/g, "") || "board";

export default function NewBoardPage() {
  const router = useRouter();
  const { isSignedIn } = useAuth();

  const { isAdmin } = useOrganizationMembership(isSignedIn);

  const [name, setName] = useState("");
  const [gatewayId, setGatewayId] = useState<string>("");
  const [boardGroupId, setBoardGroupId] = useState<string>("none");

  const [error, setError] = useState<string | null>(null);

  const gatewaysQuery = useListGatewaysApiV1GatewaysGet<
    listGatewaysApiV1GatewaysGetResponse,
    ApiError
  >(undefined, {
    query: {
      enabled: Boolean(isSignedIn && isAdmin),
      refetchOnMount: "always",
      retry: false,
    },
  });

  const groupsQuery = useListBoardGroupsApiV1BoardGroupsGet<
    listBoardGroupsApiV1BoardGroupsGetResponse,
    ApiError
  >(undefined, {
    query: {
      enabled: Boolean(isSignedIn && isAdmin),
      refetchOnMount: "always",
      retry: false,
    },
  });

  const createBoardMutation = useCreateBoardApiV1BoardsPost<ApiError>({
    mutation: {
      onSuccess: (result) => {
        if (result.status === 200) {
          router.push(`/boards/${result.data.id}/edit?onboarding=1`);
        }
      },
      onError: (err) => {
        setError(err.message || "Something went wrong.");
      },
    },
  });

  const gateways = useMemo(() => {
    if (gatewaysQuery.data?.status !== 200) return [];
    return gatewaysQuery.data.data.items ?? [];
  }, [gatewaysQuery.data]);
  const groups = useMemo<BoardGroupRead[]>(() => {
    if (groupsQuery.data?.status !== 200) return [];
    return groupsQuery.data.data.items ?? [];
  }, [groupsQuery.data]);
  const displayGatewayId = gatewayId || gateways[0]?.id || "";
  const isLoading =
    gatewaysQuery.isLoading ||
    groupsQuery.isLoading ||
    createBoardMutation.isPending;
  const errorMessage =
    error ?? gatewaysQuery.error?.message ?? groupsQuery.error?.message ?? null;

  const isFormReady = Boolean(name.trim() && displayGatewayId);

  const gatewayOptions = useMemo(
    () =>
      gateways.map((gateway) => ({ value: gateway.id, label: gateway.name })),
    [gateways],
  );

  const groupOptions = useMemo(
    () => [
      { value: "none", label: "No group" },
      ...groups.map((group) => ({ value: group.id, label: group.name })),
    ],
    [groups],
  );

  const handleSubmit = (event: React.FormEvent<HTMLFormElement>) => {
    event.preventDefault();
    if (!isSignedIn) return;
    const trimmedName = name.trim();
    const resolvedGatewayId = displayGatewayId;
    if (!trimmedName) {
      setError("Board name is required.");
      return;
    }
    if (!resolvedGatewayId) {
      setError("Select a gateway before creating a board.");
      return;
    }

    setError(null);

    createBoardMutation.mutate({
      data: {
        name: trimmedName,
        slug: slugify(trimmedName),
        gateway_id: resolvedGatewayId,
        board_group_id: boardGroupId === "none" ? null : boardGroupId,
      },
    });
  };

  return (
    <DashboardShell>
      <SignedOut>
        <SignedOutPanel
          message="Sign in to create a board."
          forceRedirectUrl="/boards/new"
          signUpForceRedirectUrl="/boards/new"
        />
      </SignedOut>
      <SignedIn>
        <DashboardSidebar />
        <main className="flex-1 overflow-y-auto bg-slate-50">
          <div className="border-b border-slate-200 bg-white px-8 py-6">
            <div>
              <h1 className="font-heading text-2xl font-semibold text-slate-900 tracking-tight">
                Create board
              </h1>
              <p className="mt-1 text-sm text-slate-500">
                Boards organize tasks and agents by mission context.
              </p>
            </div>
          </div>

          <div className="p-8">
            {!isAdmin ? (
              <AdminOnlyNotice message="Only organization owners and admins can create boards." />
            ) : (
              <form
                onSubmit={handleSubmit}
                className="space-y-6 rounded-xl border border-slate-200 bg-white p-6 shadow-sm"
              >
                <div className="space-y-4">
                  <div className="grid gap-6 md:grid-cols-2">
                    <div className="space-y-2">
                      <label className="text-sm font-medium text-slate-900">
                        Board name <span className="text-red-500">*</span>
                      </label>
                      <Input
                        value={name}
                        onChange={(event) => setName(event.target.value)}
                        placeholder="e.g. Release operations"
                        disabled={isLoading}
                      />
                    </div>
                    <div className="space-y-2">
                      <label className="text-sm font-medium text-slate-900">
                        Gateway <span className="text-red-500">*</span>
                      </label>
                      <SearchableSelect
                        ariaLabel="Select gateway"
                        value={displayGatewayId}
                        onValueChange={setGatewayId}
                        options={gatewayOptions}
                        placeholder="Select gateway"
                        searchPlaceholder="Search gateways..."
                        emptyMessage="No gateways found."
                        triggerClassName="w-full h-11 rounded-xl border border-slate-300 bg-white px-3 py-2 text-sm font-medium text-slate-900 shadow-sm focus:border-blue-500 focus:ring-2 focus:ring-blue-200"
                        contentClassName="rounded-xl border border-slate-200 shadow-lg"
                        itemClassName="px-4 py-3 text-sm text-slate-700 data-[selected=true]:bg-slate-50 data-[selected=true]:text-slate-900"
                      />
                    </div>
                  </div>

                  <div className="grid gap-6 md:grid-cols-2">
                    <div className="space-y-2">
                      <label className="text-sm font-medium text-slate-900">
                        Board group
                      </label>
                      <SearchableSelect
                        ariaLabel="Select board group"
                        value={boardGroupId}
                        onValueChange={setBoardGroupId}
                        options={groupOptions}
                        placeholder="No group"
                        searchPlaceholder="Search groups..."
                        emptyMessage="No groups found."
                        triggerClassName="w-full h-11 rounded-xl border border-slate-300 bg-white px-3 py-2 text-sm font-medium text-slate-900 shadow-sm focus:border-blue-500 focus:ring-2 focus:ring-blue-200"
                        contentClassName="rounded-xl border border-slate-200 shadow-lg"
                        itemClassName="px-4 py-3 text-sm text-slate-700 data-[selected=true]:bg-slate-50 data-[selected=true]:text-slate-900"
                        disabled={isLoading}
                      />
                      <p className="text-xs text-slate-500">
                        Optional. Groups increase cross-board visibility.
                      </p>
                    </div>
                  </div>
                </div>

                {gateways.length === 0 ? (
                  <div className="rounded-lg border border-slate-200 bg-slate-50 px-4 py-3 text-sm text-slate-600">
                    <p>
                      No gateways available. Create one in{" "}
                      <Link
                        href="/gateways"
                        className="font-medium text-blue-600 hover:text-blue-700"
                      >
                        Gateways
                      </Link>{" "}
                      to continue.
                    </p>
                  </div>
                ) : null}

                {errorMessage ? (
                  <p className="text-sm text-red-500">{errorMessage}</p>
                ) : null}

                <div className="flex justify-end gap-3">
                  <Button
                    type="button"
                    variant="ghost"
                    onClick={() => router.push("/boards")}
                    disabled={isLoading}
                  >
                    Cancel
                  </Button>
                  <Button type="submit" disabled={isLoading || !isFormReady}>
                    {isLoading ? "Creating…" : "Create board"}
                  </Button>
                </div>
              </form>
            )}
          </div>
        </main>
      </SignedIn>
    </DashboardShell>
  );
}