let isDarkMode = false;
let fontData = [];

// Load available fonts when page loads
async function loadAvailableFonts() {
  try {
    const response = await fetch("/api/fonts");
    fontData = await response.json();

    // Populate both quote and author font family selects
    const quoteFontFamily = document.getElementById("quoteFontFamily");
    const authorFontFamily = document.getElementById("authorFontFamily");

    const fontOptions = fontData
      .map((font) => `<option value="${font.family}">${font.family}</option>`)
      .join("");

    quoteFontFamily.innerHTML = fontOptions;
    authorFontFamily.innerHTML = fontOptions;

    // Initialize variations for both
    if (fontData.length > 0) {
      updateFontVariations("quote", fontData[0].family);
      updateFontVariations("author", fontData[0].family);
      generateQuote();
    }
  } catch (error) {
    console.error("Error loading fonts:", error);
    showStatus("Error loading fonts", "error");
  }
}

// Update font variations based on selected font family
function updateFontVariations(type, family) {
  const font = fontData.find((f) => f.family === family);
  if (!font) return;

  const styleSelect = document.getElementById(`${type}FontStyle`);

  // Get unique styles
  const styles = new Set(font.variations.map((v) => v.style));

  // Update style options
  styleSelect.innerHTML = Array.from(styles)
    .map(
      (style) => `<option value="${style}">${formatFontStyle(style)}</option>`
    )
    .join("");
}

// Format font weight for display
function formatFontWeight(weight) {
  switch (weight) {
    case "normal":
      return "Regular";
    case "bold":
      return "Bold";
    case "light":
      return "Light";
    case "medium":
      return "Medium";
    default:
      return weight.charAt(0).toUpperCase() + weight.slice(1);
  }
}

// Format font style for display
function formatFontStyle(style) {
  switch (style) {
    case "normal":
      return "Normal";
    case "italic":
      return "Italic";
    default:
      return style.charAt(0).toUpperCase() + style.slice(1);
  }
}

// Setup color pickers with hex input sync
function setupColorPickers() {
  const colorInputs = document.querySelectorAll('input[type="color"]');
  colorInputs.forEach((input) => {
    const textInput = document.getElementById(input.id + "Text");

    // Update text input when color changes
    input.addEventListener("input", () => {
      textInput.value = input.value.toUpperCase();
    });

    // Update color input when valid hex is entered
    textInput.addEventListener("input", () => {
      let hex = textInput.value.trim();
      if (!hex.startsWith("#")) {
        hex = "#" + hex;
      }
      if (/^#[0-9A-F]{6}$/i.test(hex)) {
        input.value = hex;
      }
    });

    // Format hex on blur
    textInput.addEventListener("blur", () => {
      let hex = textInput.value.trim();
      if (!hex.startsWith("#")) {
        hex = "#" + hex;
      }
      if (/^#[0-9A-F]{6}$/i.test(hex)) {
        textInput.value = hex.toUpperCase();
        input.value = hex;
      } else {
        textInput.value = input.value.toUpperCase();
      }
    });
  });
}

async function generateQuote() {
  const generateBtn = document.querySelector(".btn-primary");
  const btnText = generateBtn.querySelector(".btn-text");
  const btnLoader = generateBtn.querySelector(".btn-loader");

  try {
    // Show loading state
    generateBtn.disabled = true;
    btnText.style.opacity = "0";
    btnLoader.style.display = "block";
    document.getElementById("loading").style.display = "flex";
    document.getElementById("quoteImage").style.opacity = "0.5";

    const data = {
      text: document.getElementById("quoteText").value,
      author: document.getElementById("author").value,
      bgColor: document.getElementById("bgColor").value,
      barColor: document.getElementById("barColor").value,
      textColor: document.getElementById("textColor").value,
      authorColor: document.getElementById("authorColor").value,
      quoteFontFamily: document.getElementById("quoteFontFamily").value,
      quoteFontWeight: "bold", // Force bold for quote
      quoteFontStyle: document.getElementById("quoteFontStyle").value,
      authorFontFamily: document.getElementById("authorFontFamily").value,
      authorFontWeight: "normal", // Force normal for author
      authorFontStyle: document.getElementById("authorFontStyle").value,
      barWidth: parseInt(document.getElementById("barWidth").value),
    };

    const response = await fetch("/api/generate-quote", {
      method: "POST",
      headers: {
        "Content-Type": "application/json",
      },
      body: JSON.stringify(data),
    });

    const result = await response.json();

    if (result.success) {
      const img = document.getElementById("quoteImage");
      img.src = result.imageUrl;
      img.style.opacity = "1";
      showStatus("Quote generated successfully!", "success");
    } else {
      throw new Error(result.error);
    }
  } catch (error) {
    showStatus(error.message || "Error generating quote", "error");
    console.error(error);
  } finally {
    // Reset loading state
    generateBtn.disabled = false;
    btnText.style.opacity = "1";
    btnLoader.style.display = "none";
    document.getElementById("loading").style.display = "none";
  }
}

function downloadQuote() {
  const img = document.getElementById("quoteImage");
  if (!img.src || img.src === window.location.href) {
    showStatus("Generate a quote first!", "error");
    return;
  }

  const link = document.createElement("a");
  const timestamp = new Date().toISOString().split("T")[0];
  link.download = `quote-${timestamp}.png`;
  link.href = img.src;
  link.click();
}

async function viewRequests() {
  try {
    const response = await fetch("/api/requests-history");
    const requests = await response.json();

    const requestsList = document.getElementById("requestsList");
    requestsList.innerHTML = requests
      .map(
        (req) => `
            <div class="request-item">
                <div class="request-time">${new Date(
                  req.timestamp
                ).toLocaleString()}</div>
                <pre class="request-data">${JSON.stringify(
                  req.request,
                  null,
                  2
                )}</pre>
            </div>
        `
      )
      .join("");

    document.getElementById("requestsModal").style.display = "block";
  } catch (error) {
    showStatus("Error fetching requests", "error");
    console.error(error);
  }
}

function closeModal() {
  document.getElementById("requestsModal").style.display = "none";
}

function toggleTheme() {
  isDarkMode = !isDarkMode;
  document.documentElement.setAttribute(
    "data-theme",
    isDarkMode ? "dark" : "light"
  );
  document.querySelector(".theme-toggle").textContent = isDarkMode
    ? "☀️"
    : "🌙";
}

function showStatus(message, type) {
  const status = document.getElementById("status");
  status.textContent = message;
  status.style.color = type === "success" ? "var(--success)" : "#ef4444";
  status.style.display = "block";

  setTimeout(() => {
    status.style.display = "none";
  }, 3000);
}

// Event Listeners
document.addEventListener("DOMContentLoaded", () => {
  loadAvailableFonts();
  setupColorPickers();

  // Font family change listeners
  document.getElementById("quoteFontFamily").addEventListener("change", (e) => {
    updateFontVariations("quote", e.target.value);
  });

  document
    .getElementById("authorFontFamily")
    .addEventListener("change", (e) => {
      updateFontVariations("author", e.target.value);
    });

  // Check system theme preference
  if (
    window.matchMedia &&
    window.matchMedia("(prefers-color-scheme: dark)").matches
  ) {
    toggleTheme();
  }

  // Setup bar width value display
  const barWidthSlider = document.getElementById("barWidth");
  const barWidthValue = document.getElementById("barWidthValue");
  barWidthSlider.addEventListener("input", () => {
    barWidthValue.textContent = `${barWidthSlider.value}px`;
  });
});

// Close modal when clicking outside
window.onclick = function (event) {
  const modal = document.getElementById("requestsModal");
  if (event.target === modal) {
    closeModal();
  }
};