/**
 * Utility module for processing and populating the treasure map SVG.
 * Handles clue points, their status, and interaction.
 */

/**
 * Populates the SVG map with clue points
 * @param {SVGElement} svgElement - The SVG DOM element to process
 * @returns {Promise<boolean>} - Success flag
 */
export async function populateMap(svgElement) {
  try {
    if (!svgElement) {
      console.error("No SVG element provided");
      return false;
    }

    console.log("Starting map population process");

    // First, find all existing circle elements in the SVG
    const existingCircles = Array.from(svgElement.querySelectorAll("circle"));
    console.log(`Found ${existingCircles.length} existing circles in SVG`);

    // Hide all existing circles initially
    existingCircles.forEach((circle) => {
      circle.style.display = "none";
    });

    // Query the number of clues via API
    const clueCountResponse = await fetch("/api/clues/count", {
      credentials: "include",
      cache: "no-cache",
    });

    if (!clueCountResponse.ok) {
      throw new Error(
        `Failed to fetch clue count: ${clueCountResponse.status}`
      );
    }

    const { count: clueCount } = await clueCountResponse.json();
    console.log(`Total clues: ${clueCount}`);

    // Determine how many circles to display (min of existing circles and clue count)
    const circlesToShow = Math.min(existingCircles.length, clueCount);
    console.log(`Will display ${circlesToShow} circles`);

    // Sort circles by vertical position (top to bottom)
    const sortedCircles = existingCircles.sort((a, b) => {
      const aY = parseFloat(a.getAttribute("cy"));
      const bY = parseFloat(b.getAttribute("cy"));
      return aY - bY;
    });

    // Display only the needed circles and add clue-point class
    for (let i = 0; i < circlesToShow; i++) {
      const circle = sortedCircles[i];
      circle.style.display = "";
      circle.classList.add("clue-point");
      circle.setAttribute("data-clue-id", i + 1);

      // Set default appearance
      circle.style.fill = "#9e9e9e"; // Default grey color
      circle.style.stroke = "#757575";
      circle.style.strokeWidth = "2";
    }

    return true;
  } catch (error) {
    console.error("Error populating map:", error);
    return false;
  }
}

/**
 * Updates the status of each clue point based on clues data
 * @param {SVGElement} svgElement - The SVG DOM element
 * @param {Array} clues - Array of clue objects with their status
 */
export function updateCluePointStatus(svgElement, clues) {
  if (!svgElement || !clues || !clues.length) {
    console.error("Missing required parameters for updating clue status");
    return;
  }

  console.log("Updating clue point status");

  try {
    // Get all clue points
    const cluePoints = svgElement.querySelectorAll(".clue-point");

    if (!cluePoints.length) {
      console.error("No clue points found in SVG");
      return;
    }

    // Find the first unfound clue (the current one)
    const currentClueIndex = clues.findIndex((clue) => !clue.found);
    const currentClueId =
      currentClueIndex !== -1 ? clues[currentClueIndex].id : null;

    // Process each clue point
    cluePoints.forEach((circle, index) => {
      if (index >= clues.length) return;

      const clue = clues[index];
      const clueId = clue.id;

      // Determine status and apply appropriate color
      if (clue.found) {
        // Found/completed clue - Dark Green
        circle.style.fill = "#2e7d32"; // Dark green
      } else if (clueId === currentClueId) {
        // Current clue - Orange
        circle.style.fill = "#ff9800"; // Orange
      } else if (clueId < currentClueId) {
        // Skipped clue - Blue
        circle.style.fill = "#1976d2"; // Blue
      } else {
        // Not accessible yet - Grey
        circle.style.fill = "#9e9e9e"; // Grey
      }

      // Mark whether this clue point is available
      const isAvailable = clue.found || clueId === currentClueId;
      circle.setAttribute("data-available", isAvailable.toString());
    });

    console.log("Clue points updated successfully");
  } catch (error) {
    console.error("Error updating clue status:", error);
  }
}

/**
 * Attaches click handlers to clue points
 * @param {SVGElement} svgElement - The SVG DOM element
 * @param {Array} clues - Array of clue objects with their status
 * @param {Function} navigationHandler - Function to handle navigation
 */
export function attachClueClickHandlers(svgElement, clues, navigationHandler) {
  if (!svgElement || !clues || !navigationHandler) {
    console.error("Missing required parameters for attaching click handlers");
    return;
  }

  try {
    const cluePoints = svgElement.querySelectorAll(".clue-point");

    cluePoints.forEach((circle, index) => {
      if (index >= clues.length) return;

      const clue = clues[index];
      const isAvailable = circle.getAttribute("data-available") === "true";

      // Set cursor style based on availability
      circle.style.cursor = isAvailable ? "pointer" : "not-allowed";

      // Add click handler
      circle.onclick = (e) => {
        e.preventDefault();
        e.stopPropagation();

        if (isAvailable) {
          console.log(`Clicked on clue ${clue.id}`);
          navigationHandler(clue.id);
        } else {
          // Alert or other feedback if clue is not accessible
          console.log("Clue not available yet");
          // Could show a tooltip or message here
        }
      };
    });
  } catch (error) {
    console.error("Error attaching click handlers:", error);
  }
}