import { Link } from "react-router-dom";
import type { Issue } from "@paperclip/shared";
import { useQuery } from "@tanstack/react-query";
import { agentsApi } from "../api/agents";
import { projectsApi } from "../api/projects";
import { useCompany } from "../context/CompanyContext";
import { queryKeys } from "../lib/queryKeys";
import { StatusIcon } from "./StatusIcon";
import { PriorityIcon } from "./PriorityIcon";
import { formatDate } from "../lib/utils";
import { timeAgo } from "../lib/timeAgo";
import { Separator } from "@/components/ui/separator";

interface IssuePropertiesProps {
  issue: Issue;
  onUpdate: (data: Record<string, unknown>) => void;
}

function PropertyRow({ label, children }: { label: string; children: React.ReactNode }) {
  return (
    <div className="flex items-center justify-between py-1.5">
      <span className="text-xs text-muted-foreground">{label}</span>
      <div className="flex items-center gap-1.5">{children}</div>
    </div>
  );
}

function statusLabel(status: string): string {
  return status.replace(/_/g, " ").replace(/\b\w/g, (c) => c.toUpperCase());
}

function priorityLabel(priority: string): string {
  return priority.charAt(0).toUpperCase() + priority.slice(1);
}

export function IssueProperties({ issue, onUpdate }: IssuePropertiesProps) {
  const { selectedCompanyId } = useCompany();

  const { data: agents } = useQuery({
    queryKey: queryKeys.agents.list(selectedCompanyId!),
    queryFn: () => agentsApi.list(selectedCompanyId!),
    enabled: !!selectedCompanyId,
  });

  const { data: projects } = useQuery({
    queryKey: queryKeys.projects.list(selectedCompanyId!),
    queryFn: () => projectsApi.list(selectedCompanyId!),
    enabled: !!selectedCompanyId && !!issue.projectId,
  });

  const agentName = (id: string | null) => {
    if (!id || !agents) return null;
    const agent = agents.find((a) => a.id === id);
    return agent?.name ?? id.slice(0, 8);
  };

  const projectName = (id: string | null) => {
    if (!id || !projects) return id?.slice(0, 8) ?? "None";
    const project = projects.find((p) => p.id === id);
    return project?.name ?? id.slice(0, 8);
  };

  const assignee = issue.assigneeAgentId
    ? agents?.find((a) => a.id === issue.assigneeAgentId)
    : null;

  return (
    <div className="space-y-4">
      <div className="space-y-1">
        <PropertyRow label="Status">
          <StatusIcon
            status={issue.status}
            onChange={(status) => onUpdate({ status })}
          />
          <span className="text-sm">{statusLabel(issue.status)}</span>
        </PropertyRow>

        <PropertyRow label="Priority">
          <PriorityIcon
            priority={issue.priority}
            onChange={(priority) => onUpdate({ priority })}
          />
          <span className="text-sm">{priorityLabel(issue.priority)}</span>
        </PropertyRow>

        <PropertyRow label="Assignee">
          {assignee ? (
            <Link
              to={`/agents/${assignee.id}`}
              className="text-sm hover:underline"
            >
              {assignee.name}
            </Link>
          ) : (
            <span className="text-sm text-muted-foreground">Unassigned</span>
          )}
        </PropertyRow>

        {issue.projectId && (
          <PropertyRow label="Project">
            <Link
              to={`/projects/${issue.projectId}`}
              className="text-sm hover:underline"
            >
              {projectName(issue.projectId)}
            </Link>
          </PropertyRow>
        )}

        {issue.parentId && (
          <PropertyRow label="Parent">
            <Link
              to={`/issues/${issue.parentId}`}
              className="text-sm hover:underline"
            >
              {issue.ancestors?.[0]?.title ?? issue.parentId.slice(0, 8)}
            </Link>
          </PropertyRow>
        )}

        {issue.requestDepth > 0 && (
          <PropertyRow label="Depth">
            <span className="text-sm font-mono">{issue.requestDepth}</span>
          </PropertyRow>
        )}
      </div>

      <Separator />

      <div className="space-y-1">
        {issue.startedAt && (
          <PropertyRow label="Started">
            <span className="text-sm">{formatDate(issue.startedAt)}</span>
          </PropertyRow>
        )}
        {issue.completedAt && (
          <PropertyRow label="Completed">
            <span className="text-sm">{formatDate(issue.completedAt)}</span>
          </PropertyRow>
        )}
        <PropertyRow label="Created">
          <span className="text-sm">{formatDate(issue.createdAt)}</span>
        </PropertyRow>
        <PropertyRow label="Updated">
          <span className="text-sm">{timeAgo(issue.updatedAt)}</span>
        </PropertyRow>
      </div>
    </div>
  );
}