// Сервис для хранения данных в localStorage

import type { Story, GameSession } from "../types";

const STORIES_KEY = "resekai_stories";
const SESSIONS_KEY = "resekai_sessions";

// Истории
export function getStories(): Story[] {
  const data = localStorage.getItem(STORIES_KEY);
  if (!data) return [];

  const stories = JSON.parse(data);
  return stories.map((s: Story) => ({
    ...s,
    createdAt: new Date(s.createdAt),
    updatedAt: new Date(s.updatedAt),
  }));
}

export function getStoryById(id: string): Story | undefined {
  const stories = getStories();
  return stories.find((s) => s.id === id);
}

export function saveStory(story: Story): void {
  const stories = getStories();
  const index = stories.findIndex((s) => s.id === story.id);

  if (index >= 0) {
    stories[index] = story;
  } else {
    stories.push(story);
  }

  localStorage.setItem(STORIES_KEY, JSON.stringify(stories));
}

export function deleteStory(id: string): void {
  const stories = getStories().filter((s) => s.id !== id);
  localStorage.setItem(STORIES_KEY, JSON.stringify(stories));

  // Удаляем связанные сессии
  const sessions = getSessions().filter((s) => s.storyId !== id);
  localStorage.setItem(SESSIONS_KEY, JSON.stringify(sessions));
}

// Игровые сессии
export function getSessions(): GameSession[] {
  const data = localStorage.getItem(SESSIONS_KEY);
  if (!data) return [];

  const sessions = JSON.parse(data);
  return sessions.map((s: GameSession) => ({
    ...s,
    createdAt: s.createdAt ? new Date(s.createdAt) : new Date(),
    updatedAt: s.updatedAt ? new Date(s.updatedAt) : new Date(),
    messages: s.messages.map((m) => ({
      ...m,
      timestamp: new Date(m.timestamp),
    })),
  }));
}

export function getSessionByStoryId(storyId: string): GameSession | undefined {
  const sessions = getSessions();
  return sessions.find((s) => s.storyId === storyId);
}

export function getSessionById(id: string): GameSession | undefined {
  const sessions = getSessions();
  return sessions.find((s) => s.id === id);
}

export function saveSession(session: GameSession): void {
  const sessions = getSessions();
  const index = sessions.findIndex((s) => s.id === session.id);

  if (index >= 0) {
    sessions[index] = session;
  } else {
    sessions.push(session);
  }

  localStorage.setItem(SESSIONS_KEY, JSON.stringify(sessions));
}

export function deleteSession(id: string): void {
  const sessions = getSessions().filter((s) => s.id !== id);
  localStorage.setItem(SESSIONS_KEY, JSON.stringify(sessions));
}

// Генерация ID
export function generateId(): string {
  return `${Date.now()}-${Math.random().toString(36).substr(2, 9)}`;
}