import type { Profile } from './types';

const STORAGE_KEY = 'kd_profiles';

export function loadProfiles(): Profile[] {

  try {

    const raw = localStorage.getItem(STORAGE_KEY);

    if (!raw) return [];

    const parsed = JSON.parse(raw);

    if (!Array.isArray(parsed)) return [];

    return parsed.filter(

      (p: any) =>

        p &&

        typeof p.id === 'string' &&

        typeof p.name === 'string' &&

        Array.isArray(p.aggregations),

    );

  } catch {

    return [];

  }

}

export function saveProfile(profile: Profile): void {

  const profiles = loadProfiles();

  profiles.push(profile);

  localStorage.setItem(STORAGE_KEY, JSON.stringify(profiles));

}

export function deleteProfile(id: string): void {

  const profiles = loadProfiles().filter((p) => p.id !== id);

  localStorage.setItem(STORAGE_KEY, JSON.stringify(profiles));

}

export function exportProfile(profile: Profile): void {

  const json = JSON.stringify(profile, null, 2);

  const blob = new Blob([json], { type: 'application/json' });

  const url = URL.createObjectURL(blob);

  const a = document.createElement('a');

  a.href = url;

  a.download = `${profile.name.replace(/[^a-z0-9_-]/gi, '_')}.json`;

  a.click();

  URL.revokeObjectURL(url);

}

export function importProfile(file: File): Promise<Profile> {

  return new Promise((resolve, reject) => {

    const reader = new FileReader();

    reader.onload = () => {

      try {

        const profile = JSON.parse(reader.result as string);

        if (

          !profile ||

          typeof profile.name !== 'string' ||

          !Array.isArray(profile.aggregations)

        ) {

          reject(new Error('Invalid profile format'));

          return;

        }

        // Assign a new ID to avoid collisions

        profile.id = crypto.randomUUID();

        resolve(profile as Profile);

      } catch {

        reject(new Error('Failed to parse profile JSON'));

      }

    };

    reader.onerror = () => reject(new Error('Failed to read file'));

    reader.readAsText(file);

  });

}