import { Button, Panel, Spinner } from "@/shared";
import { useProjectPlugins } from "./useProjectPlugins";

export interface ProjectPluginsPanelProps {
  projectId: string;
  onAssignAgents?: () => void;
}

function countLabel(count: number, singular: string, plural: string): string {
  return `${count} ${count === 1 ? singular : plural}`;
}

export function ProjectPluginsPanel({
  projectId,
  onAssignAgents,
}: ProjectPluginsPanelProps) {
  const vm = useProjectPlugins(projectId);

  if (vm.loading && !vm.settings) {
    return (
      <Panel aria-label="plugins du projet" className="flex items-center gap-2">
        <Spinner size={14} />
        <span className="text-sm text-muted">Chargement des plugins du projet…</span>
      </Panel>
    );
  }

  const installedIds = new Set(vm.installed.map((plugin) => plugin.id));
  const missing = (vm.settings?.plugins ?? []).filter(
    (activation) => !installedIds.has(activation.pluginId),
  );

  return (
    <section aria-label="plugins du projet" className="flex flex-col gap-3">
      <div className="flex items-start justify-between gap-4">
        <div>
          <h2 className="text-sm font-semibold text-content">Plugins du projet</h2>
          <p className="mt-1 text-xs text-muted">
            Activez les plugins utilisés par ce projet, puis attribuez leurs skills et
            tools MCP à chaque agent.
          </p>
        </div>
        {onAssignAgents && (
          <Button size="sm" variant="primary" onClick={onAssignAgents}>
            Attribuer aux agents
          </Button>
        )}
      </div>

      {vm.error && <p role="alert" className="text-sm text-danger">{vm.error}</p>}

      {vm.installed.length === 0 && missing.length === 0 ? (
        <Panel><p className="text-sm text-muted">Aucun plugin installé globalement.</p></Panel>
      ) : (
        <ul className="flex flex-col gap-2">
          {vm.installed.map((plugin) => {
            const enabled = vm.settings?.plugins.some(
              (entry) => entry.pluginId === plugin.id && entry.enabled,
            ) ?? false;
            const skills = plugin.contributes.skills ?? [];
            const servers = plugin.contributes.mcpServers ?? [];
            return (
              <li key={plugin.id}>
                <Panel className="flex flex-col gap-3">
                  <div className="flex items-start justify-between gap-4">
                    <div className="min-w-0">
                      <div className="flex flex-wrap items-center gap-2">
                        <span className="text-sm font-semibold text-content">{plugin.displayName}</span>
                        <span className="text-xs text-faint">v{plugin.version}</span>
                        <span className="rounded bg-raised px-1.5 py-0.5 text-[0.65rem] text-muted">
                          Installé globalement
                        </span>
                      </div>
                      <p className="mt-1 text-xs text-muted">
                        {countLabel(skills.length, "skill", "skills")} · {countLabel(servers.length, "serveur MCP", "serveurs MCP")}
                      </p>
                    </div>
                    <label className="flex shrink-0 items-center gap-2 text-xs text-content">
                      <input
                        type="checkbox"
                        checked={enabled}
                        disabled={vm.busy}
                        onChange={(event) => void vm.setEnabled(plugin.id, event.target.checked)}
                      />
                      Activé pour ce projet
                    </label>
                  </div>

                  <details>
                    <summary className="cursor-pointer text-xs font-medium text-primary">
                      Voir les capabilities
                    </summary>
                    <div className="mt-3 grid gap-3 sm:grid-cols-2">
                      <div>
                        <h3 className="text-xs font-semibold text-content">Skills fournis</h3>
                        {skills.length === 0 ? (
                          <p className="mt-1 text-xs text-muted">Aucun skill fourni.</p>
                        ) : (
                          <ul className="mt-1 flex flex-col gap-1">
                            {skills.map((skill) => (
                              <li key={skill.id} className="text-xs text-muted">
                                <span className="font-medium text-content">{skill.name}</span>
                                {skill.description ? ` — ${skill.description}` : ""}
                              </li>
                            ))}
                          </ul>
                        )}
                      </div>
                      <div>
                        <h3 className="text-xs font-semibold text-content">Tools MCP fournis</h3>
                        {servers.length === 0 ? (
                          <p className="mt-1 text-xs text-muted">Aucun serveur MCP fourni.</p>
                        ) : (
                          <ul className="mt-1 flex flex-col gap-1">
                            {servers.map((server) => (
                              <li key={server.id} className="text-xs text-muted">
                                <span className="font-medium text-content">{server.displayName}</span>
                                <span className="text-faint"> · {server.id}</span>
                              </li>
                            ))}
                          </ul>
                        )}
                      </div>
                    </div>
                  </details>
                </Panel>
              </li>
            );
          })}

          {missing.map((activation) => (
            <li key={activation.pluginId}>
              <Panel className="flex items-center justify-between gap-4 border-warning/40">
                <div>
                  <span className="text-sm font-semibold text-content">{activation.pluginId}</span>
                  <p className="text-xs text-warning">Plugin manquant · configuration conservée</p>
                </div>
                <label className="flex items-center gap-2 text-xs text-muted">
                  <input
                    type="checkbox"
                    checked={activation.enabled}
                    disabled={vm.busy || !activation.enabled}
                    onChange={(event) => void vm.setEnabled(activation.pluginId, event.target.checked)}
                  />
                  Activé pour ce projet
                </label>
              </Panel>
            </li>
          ))}
        </ul>
      )}
    </section>
  );
}