// ObsWiki Frontend JavaScript
class ObsWiki {
  constructor() {
    this.searchInput = document.getElementById("search");
    this.currentUser = null;
    this.searchTimeout = null;

    this.init();
  }

  init() {
    this.setupSearch();
    this.setupAuth();
    this.setupWikiLinks();
    this.setupTags();
  }

  setupSearch() {
    if (this.searchInput) {
      this.searchInput.addEventListener("input", (e) => {
        clearTimeout(this.searchTimeout);
        this.searchTimeout = setTimeout(() => {
          this.performSearch(e.target.value);
        }, 300);
      });

      this.searchInput.addEventListener("keydown", (e) => {
        if (e.key === "Enter") {
          e.preventDefault();
          this.performSearch(e.target.value);
        }
      });
    }
  }

  async performSearch(query) {
    if (query.length < 2) {
      this.hideSearchResults();
      return;
    }

    try {
      const response = await fetch(
        `/api/search?q=${encodeURIComponent(query)}&limit=5`,
      );
      if (response.ok) {
        const results = await response.json();
        this.showSearchResults(results);
      }
    } catch (error) {
      console.error("Search error:", error);
    }
  }

  showSearchResults(results) {
    let resultsContainer = document.getElementById("search-results");

    if (!resultsContainer) {
      resultsContainer = document.createElement("div");
      resultsContainer.id = "search-results";
      this.searchInput.parentNode.appendChild(resultsContainer);
    }

    if (results.length === 0) {
      resultsContainer.innerHTML =
        '<div>No results found</div>';
    } else {
      resultsContainer.innerHTML = results
        .map(
          (page) => `
                <a href="/wiki/${this.encodePath(page.path)}">
                    <div>${this.escapeHtml(page.title)}</div>
                    <div>${this.escapeHtml(page.path)}</div>
                </a>
            `,
        )
        .join("");
    }

    resultsContainer.style.display = "block";
  }

  hideSearchResults() {
    const resultsContainer = document.getElementById("search-results");
    if (resultsContainer) {
      resultsContainer.style.display = "none";
    }
  }

  setupAuth() {
    const token = localStorage.getItem("obswiki_token");
    if (token) {
      this.verifyToken(token);
    }

    // Handle login form
    const loginForm = document.getElementById("login-form");
    if (loginForm) {
      loginForm.addEventListener("submit", (e) => {
        e.preventDefault();
        this.handleLogin(new FormData(loginForm));
      });
    }

    // Handle register form
    const registerForm = document.getElementById("register-form");
    if (registerForm) {
      registerForm.addEventListener("submit", (e) => {
        e.preventDefault();
        this.handleRegister(new FormData(registerForm));
      });
    }

    // Handle logout
    const logoutBtn = document.getElementById("logout-btn");
    if (logoutBtn) {
      logoutBtn.addEventListener("click", (e) => {
        e.preventDefault();
        this.logout();
      });
    }
  }

  async handleLogin(formData) {
    try {
      const response = await fetch("/auth/login", {
        method: "POST",
        headers: {
          "Content-Type": "application/json",
        },
        body: JSON.stringify({
          username: formData.get("username"),
          password: formData.get("password"),
        }),
      });

      if (response.ok) {
        const data = await response.json();
        this.setAuth(data.token, data.user);
        window.location.href = "/";
      } else {
        this.showError("Invalid username or password");
      }
    } catch (error) {
      console.error("Login error:", error);
      this.showError("Login failed");
    }
  }

  async handleRegister(formData) {
    try {
      const response = await fetch("/auth/register", {
        method: "POST",
        headers: {
          "Content-Type": "application/json",
        },
        body: JSON.stringify({
          username: formData.get("username"),
          email: formData.get("email"),
          password: formData.get("password"),
        }),
      });

      if (response.ok) {
        const data = await response.json();
        this.setAuth(data.token, data.user);
        window.location.href = "/";
      } else {
        this.showError("Registration failed");
      }
    } catch (error) {
      console.error("Register error:", error);
      this.showError("Registration failed");
    }
  }

  async verifyToken(token) {
    try {
      const response = await fetch("/api/me", {
        headers: {
          Authorization: `Bearer ${token}`,
        },
      });

      if (response.ok) {
        const user = await response.json();
        this.setAuth(token, user, false);
      } else {
        localStorage.removeItem("obswiki_token");
      }
    } catch (error) {
      console.error("Token verification error:", error);
      localStorage.removeItem("obswiki_token");
    }
  }

  setAuth(token, user, store = true) {
    if (store) {
      localStorage.setItem("obswiki_token", token);
    }
    this.currentUser = user;
    this.updateAuthUI();
  }

  logout() {
    localStorage.removeItem("obswiki_token");
    this.currentUser = null;
    this.updateAuthUI();
    window.location.href = "/";
  }

  updateAuthUI() {
    const authContainer = document.querySelector(".auth");
    if (!authContainer) return;

    if (this.currentUser) {
      authContainer.innerHTML = `
                <span>Welcome, ${this.escapeHtml(this.currentUser.username)}</span>
                <a href="#" id="logout-btn">Logout</a>
            `;

      const logoutBtn = document.getElementById("logout-btn");
      if (logoutBtn) {
        logoutBtn.addEventListener("click", (e) => {
          e.preventDefault();
          this.logout();
        });
      }
    } else {
      authContainer.innerHTML = `
                <a href="/auth/login">Login</a>
                <a href="/auth/register">Register</a>
            `;
    }
  }

  setupWikiLinks() {
    // Handle wiki link clicks for better navigation
    document.addEventListener("click", (e) => {
      if (e.target.classList.contains("wiki-link")) {
        // Add loading state or other UX improvements here
      }
    });
  }

  setupTags() {
    // Handle tag clicks
    document.addEventListener("click", (e) => {
      if (e.target.classList.contains("tag")) {
        const tag = e.target.getAttribute("data-tag");
        if (tag) {
          this.searchByTag(tag);
        }
      }
    });
  }

  searchByTag(tag) {
    if (this.searchInput) {
      this.searchInput.value = `#${tag}`;
      this.performSearch(`#${tag}`);
    }
  }

  showError(message) {
    // Create or update error message
    let errorDiv = document.getElementById("error-message");
    if (!errorDiv) {
      errorDiv = document.createElement("div");
      errorDiv.id = "error-message";
      errorDiv.id = "error-message";
      document.body.insertBefore(errorDiv, document.body.firstChild);
    }

    errorDiv.textContent = message;
    errorDiv.style.display = "block";

    // Auto-hide after 5 seconds
    setTimeout(() => {
      errorDiv.style.display = "none";
    }, 5000);
  }

  escapeHtml(text) {
    const div = document.createElement("div");
    div.textContent = text;
    return div.innerHTML;
  }

  encodePath(path) {
    // Split path by '/' and encode each component separately, then rejoin with '/'
    return path
      .split("/")
      .map((component) => encodeURIComponent(component))
      .join("/");
  }



  // Utility method for making authenticated requests
  async authenticatedFetch(url, options = {}) {
    const token = localStorage.getItem("obswiki_token");
    if (token) {
      options.headers = {
        ...options.headers,
        Authorization: `Bearer ${token}`,
      };
    }
    return fetch(url, options);
  }
}

// Initialize when DOM is loaded
document.addEventListener("DOMContentLoaded", () => {
  window.obswiki = new ObsWiki();
});