"use client";

import { DialogTitle } from "@kandev/ui/dialog";
import { RepositorySelector, InlineTaskName } from "@/components/task-create-dialog-selectors";
import type { useRepositoryOptions } from "@/components/task-create-dialog-options";

function getRepositoryPlaceholder(
  workspaceId: string | null,
  repositoriesLoading: boolean,
  discoverReposLoading: boolean,
) {
  if (!workspaceId) return "Select workspace first";
  if (repositoriesLoading || discoverReposLoading) return "Loading...";
  return "Select repository";
}

export type DialogHeaderContentProps = {
  isCreateMode: boolean;
  isEditMode: boolean;
  isTaskStarted: boolean;
  sessionRepoName?: string;
  initialTitle?: string;
  taskName: string;
  repositoryId: string;
  discoveredRepoPath: string;
  workspaceId: string | null;
  repositoriesLoading: boolean;
  discoverReposLoading: boolean;
  headerRepositoryOptions: ReturnType<typeof useRepositoryOptions>["headerRepositoryOptions"];
  onRepositoryChange: (v: string) => void;
  onTaskNameChange: (v: string) => void;
  useGitHubUrl: boolean;
  githubUrl: string;
  githubUrlError: string | null;
  onToggleGitHubUrl: () => void;
  onGitHubUrlChange: (v: string) => void;
};

function RepoSourceInput({
  useGitHubUrl,
  githubUrl,
  githubUrlError,
  onGitHubUrlChange,
  isTaskStarted,
  headerRepositoryOptions,
  repositoryId,
  discoveredRepoPath,
  onRepositoryChange,
  workspaceId,
  repositoriesLoading,
  discoverReposLoading,
}: Pick<
  DialogHeaderContentProps,
  | "useGitHubUrl"
  | "githubUrl"
  | "githubUrlError"
  | "onGitHubUrlChange"
  | "isTaskStarted"
  | "headerRepositoryOptions"
  | "repositoryId"
  | "discoveredRepoPath"
  | "onRepositoryChange"
  | "workspaceId"
  | "repositoriesLoading"
  | "discoverReposLoading"
>): React.ReactNode {
  if (useGitHubUrl) {
    return (
      <div className="relative">
        <input
          type="text"
          value={githubUrl}
          onChange={(e) => onGitHubUrlChange(e.target.value)}
          placeholder="github.com/owner/repo"
          data-testid="github-url-input"
          aria-label="GitHub repository URL"
          aria-invalid={!!githubUrlError}
          aria-describedby={githubUrlError ? "github-url-error" : undefined}
          size={Math.max((githubUrl || "").length + 1, "github.com/owner/repo".length)}
          className={`bg-transparent border-none outline-none focus:ring-0 text-sm font-medium min-w-0 h-7 rounded-md px-2 hover:bg-muted focus:bg-muted transition-colors placeholder:text-muted-foreground ${githubUrlError ? "text-destructive" : ""}`}
          disabled={isTaskStarted}
          autoFocus
        />
        {githubUrlError && (
          <div
            id="github-url-error"
            role="alert"
            className="absolute left-0 top-full mt-1 z-50 rounded-md border bg-popover px-2 py-1 text-[11px] text-destructive shadow-md whitespace-nowrap"
            data-testid="github-url-error"
          >
            {githubUrlError}
          </div>
        )}
      </div>
    );
  }
  return (
    <RepositorySelector
      options={headerRepositoryOptions}
      value={repositoryId || discoveredRepoPath}
      onValueChange={onRepositoryChange}
      placeholder={getRepositoryPlaceholder(workspaceId, repositoriesLoading, discoverReposLoading)}
      searchPlaceholder="Search repositories..."
      emptyMessage={
        repositoriesLoading || discoverReposLoading
          ? "Loading repositories..."
          : "No repositories found."
      }
      disabled={isTaskStarted || !workspaceId || repositoriesLoading || discoverReposLoading}
      triggerClassName="w-auto text-sm"
    />
  );
}

export function DialogHeaderContent(props: DialogHeaderContentProps) {
  const { isCreateMode, isEditMode, isTaskStarted, sessionRepoName, initialTitle } = props;
  const { taskName, onTaskNameChange, useGitHubUrl, onToggleGitHubUrl } = props;

  if (isCreateMode || isEditMode) {
    return (
      <>
        <DialogTitle asChild>
          <div className="flex items-center gap-1 text-sm font-medium min-w-0">
            <RepoSourceInput {...props} />
            <span className="text-muted-foreground mr-2">/</span>
            <InlineTaskName
              value={taskName}
              onChange={onTaskNameChange}
              autoFocus={!isEditMode && !useGitHubUrl}
            />
          </div>
        </DialogTitle>
        {!isTaskStarted && (
          <div className="flex items-center gap-2 pl-2">
            <button
              type="button"
              onClick={onToggleGitHubUrl}
              className="text-xs text-muted-foreground hover:text-foreground cursor-pointer transition-colors"
              data-testid="toggle-github-url"
            >
              {useGitHubUrl ? "or select a repository" : "or paste a GitHub URL"}
            </button>
          </div>
        )}
      </>
    );
  }
  return (
    <DialogTitle asChild>
      <div className="flex items-center gap-1 min-w-0 text-sm font-medium">
        {sessionRepoName && (
          <>
            <span className="truncate text-muted-foreground">{sessionRepoName}</span>
            <span className="text-muted-foreground mx-0.5">/</span>
          </>
        )}
        <span className="truncate">{initialTitle || "Task"}</span>
        <span className="text-muted-foreground mx-0.5">/</span>
        <span className="text-muted-foreground whitespace-nowrap">new session</span>
      </div>
    </DialogTitle>
  );
}