"use client";

import { Button } from "@kandev/ui/button";
import { Checkbox } from "@kandev/ui/checkbox";
import {
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuLabel,
  DropdownMenuSeparator,
  DropdownMenuTrigger,
} from "@kandev/ui/dropdown-menu";
import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@kandev/ui/select";
import { IconAdjustmentsHorizontal } from "@tabler/icons-react";
import { useKanbanDisplaySettings } from "@/hooks/use-kanban-display-settings";
import type { Workspace, Repository } from "@/lib/types/http";
import type { WorkflowsState } from "@/lib/state/slices";
import type { ComponentProps } from "react";

type KanbanDisplayDropdownProps = {
  triggerSize?: ComponentProps<typeof Button>["size"];
};

function getRepositoryPlaceholder(
  repositoriesLoading: boolean,
  repositoriesEmpty: boolean,
): string {
  if (repositoriesLoading) return "Loading repositories...";
  if (repositoriesEmpty) return "No repositories";
  return "Select repository";
}

function WorkspaceSection({
  activeWorkspaceId,
  workspaces,
  onWorkspaceChange,
}: {
  activeWorkspaceId: string | null;
  workspaces: Workspace[];
  onWorkspaceChange: (id: string | null) => void;
}) {
  return (
    <div className="space-y-1.5">
      <DropdownMenuLabel className="px-0 text-foreground">Workspace</DropdownMenuLabel>
      <Select
        value={activeWorkspaceId ?? ""}
        onValueChange={(value) => onWorkspaceChange(value || null)}
      >
        <SelectTrigger className="w-full border-border" data-testid="workspace-select-trigger">
          <SelectValue placeholder="Select workspace" />
        </SelectTrigger>
        <SelectContent>
          {workspaces.map((workspace: Workspace) => (
            <SelectItem
              key={workspace.id}
              value={workspace.id}
              data-testid={`workspace-select-item-${workspace.id}`}
            >
              {workspace.name}
            </SelectItem>
          ))}
        </SelectContent>
      </Select>
    </div>
  );
}

function WorkflowSection({
  activeWorkflowId,
  workflows,
  onWorkflowChange,
}: {
  activeWorkflowId: string | null;
  workflows: WorkflowsState["items"];
  onWorkflowChange: (id: string | null) => void;
}) {
  return (
    <div className="space-y-1.5">
      <DropdownMenuLabel className="px-0 text-foreground">Workflow</DropdownMenuLabel>
      <Select
        value={activeWorkflowId ?? "all"}
        onValueChange={(value) => onWorkflowChange(value === "all" ? null : value)}
      >
        <SelectTrigger data-testid="display-workflow-filter" className="w-full border-border">
          <SelectValue placeholder="Select workflow" />
        </SelectTrigger>
        <SelectContent>
          <SelectItem value="all">All Workflows</SelectItem>
          {workflows.map((workflow: WorkflowsState["items"][number]) => (
            <SelectItem key={workflow.id} value={workflow.id}>
              {workflow.name}
            </SelectItem>
          ))}
        </SelectContent>
      </Select>
    </div>
  );
}

function RepositorySection({
  repositoryValue,
  repositories,
  repositoriesLoading,
  onRepositoryChange,
}: {
  repositoryValue: string;
  repositories: Repository[];
  repositoriesLoading: boolean;
  onRepositoryChange: (value: string | "all") => void;
}) {
  return (
    <div className="space-y-1.5">
      <DropdownMenuLabel className="px-0 text-foreground">Repository</DropdownMenuLabel>
      <Select
        value={repositoryValue}
        onValueChange={(value) => onRepositoryChange(value as string | "all")}
        disabled={repositories.length === 0}
      >
        <SelectTrigger data-testid="display-repository-filter" className="w-full border-border">
          <SelectValue
            placeholder={getRepositoryPlaceholder(repositoriesLoading, repositories.length === 0)}
          />
        </SelectTrigger>
        <SelectContent>
          <SelectItem value="all">All repositories</SelectItem>
          {repositories.map((repo: Repository) => (
            <SelectItem key={repo.id} value={repo.id}>
              {repo.name}
            </SelectItem>
          ))}
        </SelectContent>
      </Select>
    </div>
  );
}

export function KanbanDisplayDropdown({ triggerSize = "icon" }: KanbanDisplayDropdownProps) {
  const {
    workspaces,
    workflows,
    activeWorkspaceId,
    activeWorkflowId,
    repositories,
    repositoriesLoading,
    allRepositoriesSelected,
    selectedRepositoryId,
    enablePreviewOnClick,
    onWorkspaceChange,
    onWorkflowChange,
    onRepositoryChange,
    onTogglePreviewOnClick,
  } = useKanbanDisplaySettings();

  const repositoryValue = allRepositoriesSelected ? "all" : (selectedRepositoryId ?? "all");

  return (
    <DropdownMenu>
      <DropdownMenuTrigger asChild>
        <Button
          variant="outline"
          size={triggerSize}
          data-testid="display-button"
          className="cursor-pointer"
        >
          <IconAdjustmentsHorizontal className="h-4 w-4" />
        </Button>
      </DropdownMenuTrigger>
      <DropdownMenuContent align="end" className="w-[280px] p-3">
        <div className="space-y-3">
          <WorkspaceSection
            activeWorkspaceId={activeWorkspaceId}
            workspaces={workspaces}
            onWorkspaceChange={onWorkspaceChange}
          />
          <DropdownMenuSeparator />
          <WorkflowSection
            activeWorkflowId={activeWorkflowId}
            workflows={workflows}
            onWorkflowChange={onWorkflowChange}
          />
          <DropdownMenuSeparator />
          <RepositorySection
            repositoryValue={repositoryValue}
            repositories={repositories}
            repositoriesLoading={repositoriesLoading}
            onRepositoryChange={onRepositoryChange}
          />
          <DropdownMenuSeparator />
          <div className="space-y-1.5">
            <DropdownMenuLabel className="px-0 text-foreground">Preview Panel</DropdownMenuLabel>
            <label className="flex items-center gap-2 cursor-pointer">
              <Checkbox
                checked={enablePreviewOnClick ?? false}
                onCheckedChange={(checked) => {
                  onTogglePreviewOnClick?.(!!checked);
                }}
              />
              <span className="text-sm text-foreground">Open preview on click</span>
            </label>
            <p className="text-xs text-muted-foreground pl-6">
              When enabled, clicking a task opens the preview panel. When disabled, clicking
              navigates directly to the session.
            </p>
          </div>
        </div>
      </DropdownMenuContent>
    </DropdownMenu>
  );
}