import {
  SkillLevel,
  SKILL_LEVEL_VALUES,
  CategoryEvaluation,
  RadarChartData,
  UserEvaluation,
  SkillCategory,
} from "./types";

export function calculateCategoryScore(
  categoryEvaluation: CategoryEvaluation
): number {
  if (categoryEvaluation.skills.length === 0) return 0;

  const evaluatedSkills = categoryEvaluation.skills.filter(
    (skill) => skill.level !== null
  );
  if (evaluatedSkills.length === 0) return 0;

  const totalScore = evaluatedSkills.reduce((sum, skill) => {
    return sum + SKILL_LEVEL_VALUES[skill.level!];
  }, 0);

  return totalScore / evaluatedSkills.length;
}

export function generateRadarData(
  evaluations: CategoryEvaluation[],
  categories: SkillCategory[]
): RadarChartData[] {
  const maxScore = 3; // Expert level

  return categories.map((category) => {
    const evaluation = evaluations.find(
      (e) => e.category === category.category
    );
    const score = evaluation ? calculateCategoryScore(evaluation) : 0;

    return {
      category: category.category,
      score: Math.round(score * 10) / 10, // Round to 1 decimal
      maxScore,
    };
  });
}

export function saveUserEvaluation(evaluation: UserEvaluation): void {
  try {
    localStorage.setItem(
      "peakSkills_userEvaluation",
      JSON.stringify(evaluation)
    );
  } catch (error) {
    console.error("Failed to save user evaluation:", error);
  }
}

export function loadUserEvaluation(): UserEvaluation | null {
  try {
    const saved = localStorage.getItem("peakSkills_userEvaluation");
    return saved ? JSON.parse(saved) : null;
  } catch (error) {
    console.error("Failed to load user evaluation:", error);
    return null;
  }
}

export function createEmptyEvaluation(
  categories: SkillCategory[]
): CategoryEvaluation[] {
  return categories.map((category) => ({
    category: category.category,
    skills: [],
    selectedSkillIds: [],
  }));
}