export type MoodDefinition = {
  id: string;
  label: string;
  emoji: string;
  color: string;
  score: number;
};

export const MOOD_CATALOG: MoodDefinition[] = [
  { id: "happy", label: "Happy", emoji: "😊", color: "#f4b740", score: 5 },
  { id: "excited", label: "Excited", emoji: "🤩", color: "#ff8c42", score: 5 },
  { id: "grateful", label: "Grateful", emoji: "🙏", color: "#7cb342", score: 4 },
  { id: "calm", label: "Calm", emoji: "😌", color: "#64b5f6", score: 4 },
  { id: "neutral", label: "Neutral", emoji: "😐", color: "#90a4ae", score: 3 },
  { id: "tired", label: "Tired", emoji: "😴", color: "#8d6e63", score: 2 },
  { id: "anxious", label: "Anxious", emoji: "😰", color: "#ab47bc", score: 2 },
  { id: "stressed", label: "Stressed", emoji: "😣", color: "#e57373", score: 1 },
  { id: "sad", label: "Sad", emoji: "😢", color: "#5c6bc0", score: 1 },
  { id: "angry", label: "Angry", emoji: "😠", color: "#d84315", score: 2 },
];

const moodById = new Map(MOOD_CATALOG.map((mood) => [mood.id, mood]));

export function getMoodById(id: string): MoodDefinition | undefined {
  return moodById.get(id);
}

export function averageMoodScore(moodIds: string[]): number | null {
  if (moodIds.length === 0) return null;
  const scores = moodIds
    .map((id) => moodById.get(id)?.score)
    .filter((score): score is number => typeof score === "number");
  if (scores.length === 0) return null;
  return scores.reduce((sum, score) => sum + score, 0) / scores.length;
}

export function validateMoodIds(moodIds: string[]): string[] {
  return moodIds.filter((id) => moodById.has(id));
}