import fs from "fs";
import path from "path";
import { SkillCategory } from "./types";

/**
 * Load all skill categories from JSON files in the data/skills directory
 */
export function loadSkillCategoriesFromFiles(): SkillCategory[] {
  const dataDir = path.join(process.cwd(), "data", "skills");
  const skillCategories: SkillCategory[] = [];

  try {
    // Read all JSON files in the skills directory
    const files = fs
      .readdirSync(dataDir)
      .filter((file) => file.endsWith(".json"));
    console.log(`📁 Found ${files.length} JSON files: ${files.join(", ")}`);

    // Load all JSON files
    for (const file of files) {
      const filePath = path.join(dataDir, file);
      const categoryName = path.basename(file, ".json");

      try {
        console.log(`📖 Loading ${file}...`);
        const fileContent = fs.readFileSync(filePath, "utf-8");
        const data = JSON.parse(fileContent);

        // Validate that it's a proper SkillCategory
        if (data.category && data.icon && Array.isArray(data.skills)) {
          skillCategories.push(data);
        } else {
          console.warn(`⚠️ Invalid skill category format in ${file}`);
        }
      } catch (error) {
        console.error(`❌ Error loading ${file}:`, error);
        // Continue with other files instead of failing completely
      }
    }

    console.log(`📊 Successfully loaded ${skillCategories.length} categories`);
    return skillCategories;
  } catch (error) {
    console.error("❌ Error reading skills directory:", error);
    return [];
  }
}

/**
 * Get the list of available skill category files
 */
export function getSkillCategoryFiles(): string[] {
  try {
    const dataDir = path.join(process.cwd(), "data", "skills");
    return fs
      .readdirSync(dataDir)
      .filter((file) => file.endsWith(".json"))
      .map((file) => path.basename(file, ".json"));
  } catch (error) {
    console.error("❌ Error reading skills directory:", error);
    return [];
  }
}

/**
 * Load a specific skill category by filename
 */
export function loadSkillCategoryFromFile(
  categoryName: string
): SkillCategory | null {
  try {
    const dataDir = path.join(process.cwd(), "data", "skills");
    const filePath = path.join(dataDir, `${categoryName}.json`);

    if (!fs.existsSync(filePath)) {
      console.warn(`⚠️ Skill category file not found: ${categoryName}.json`);
      return null;
    }

    const fileContent = fs.readFileSync(filePath, "utf-8");
    const data = JSON.parse(fileContent);

    // Validate that it's a proper SkillCategory
    if (data.category && data.icon && Array.isArray(data.skills)) {
      return data;
    } else {
      console.warn(`⚠️ Invalid skill category format in ${categoryName}.json`);
      return null;
    }
  } catch (error) {
    console.error(`❌ Error loading skill category ${categoryName}:`, error);
    return null;
  }
}