/**
 * Chrono Manager - Collections Store
 */

import { defineStore } from 'pinia';
import { ref } from 'vue';
import { collectionService } from '../services/collectionService';
import type {
  SourceSelector,
  ListFilter,
  ListSort,
} from '../types/common';
import { CollectionObject } from '../models/collection';
import type { ServiceObject } from '../models/service';
import type { CollectionInterface } from '../types/collection';

export const useCollectionsStore = defineStore('chronoCollectionsStore', () => {
  // State
  const collections = ref<CollectionObject[]>([]);

  // Actions

  /**
   * Retrieve collections from the server
   */
  async function list(
    sources?: SourceSelector,
    filter?: ListFilter,
    sort?: ListSort,
    uid?: string
  ): Promise<CollectionObject[]> {
    try {
      const response = await collectionService.list({ sources, filter, sort, uid });
      
      // Flatten the nested response into a flat array
      const flatCollections: CollectionObject[] = [];
      Object.entries(response).forEach(([_providerId, providerCollections]) => {
        Object.entries(providerCollections).forEach(([_serviceId, serviceCollections]) => {
          Object.values(serviceCollections).forEach((collection: CollectionInterface) => {
            flatCollections.push(new CollectionObject().fromJson(collection));
          });
        });
      });
      
      console.debug('[Chrono Manager](Store) - Successfully retrieved', flatCollections.length, 'collections:', flatCollections.map(c => ({
        id: c.id,
        label: c.label,
        service: c.service,
        provider: c.provider
      })));
      
      collections.value = flatCollections;
      return flatCollections;
    } catch (error: any) {
      console.error('[Chrono Manager](Store) - Failed to retrieve collections:', error);
      throw error;
    }
  }

  /**
   * Fetch a specific collection
   */
  async function fetch(
    provider: string,
    service: string,
    identifier: string | number,
    uid?: string
  ): Promise<CollectionObject | null> {
    try {
      const response = await collectionService.fetch({ provider, service, identifier, uid });

      return new CollectionObject().fromJson(response);
    } catch (error: any) {
      console.error('[Chrono Manager](Store) - Failed to fetch collection:', error);
      throw error;
    }
  }

  /**
   * Create a fresh collection object with default values
   */
  function fresh(): CollectionObject {
    return new CollectionObject();
  }

  /**
   * Create a new collection
   */
  async function create(
    service: ServiceObject,
    collection: CollectionObject,
    options?: string[],
    uid?: string
  ): Promise<CollectionObject | null> {
    try {
      if (service.provider === null || service.id === null) {
        throw new Error('Invalid service object, must have a provider and identifier');
      }

      const response = await collectionService.create({
        provider: service.provider,
        service: service.id,
        data: collection.toJson(),
        options,
        uid
      });
      
      const createdCollection = new CollectionObject().fromJson(response);
      collections.value.push(createdCollection);
      
      console.debug('[Chrono Manager](Store) - Successfully created collection');
      
      return createdCollection;
    } catch (error: any) {
      console.error('[Chrono Manager](Store) - Failed to create collection:', error);
      throw error;
    }
  }

  /**
   * Modify an existing collection
   */
  async function modify(
    collection: CollectionObject,
    uid?: string
  ): Promise<CollectionObject | null> {
    try {
      if (!collection.provider || !collection.service || !collection.id) {
        throw new Error('Collection must have provider, service, and id');
      }

      const response = await collectionService.modify({
        provider: collection.provider,
        service: collection.service,
        identifier: collection.id,
        data: collection.toJson(),
        uid
      });
      
      const modifiedCollection = new CollectionObject().fromJson(response);
      const index = collections.value.findIndex(c => c.id === collection.id);
      if (index !== -1) {
        collections.value[index] = modifiedCollection;
      }
      
      console.debug('[Chrono Manager](Store) - Successfully modified collection');
      
      return modifiedCollection;
    } catch (error: any) {
      console.error('[Chrono Manager](Store) - Failed to modify collection:', error);
      throw error;
    }
  }

  /**
   * Delete a collection
   */
  async function destroy(
    collection: CollectionObject,
    uid?: string
  ): Promise<boolean> {
    try {
      if (!collection.provider || !collection.service || !collection.id) {
        throw new Error('Collection must have provider, service, and id');
      }

      const response = await collectionService.destroy({
        provider: collection.provider,
        service: collection.service,
        identifier: collection.id,
        uid
      });
      
      if (response.success) {
        const index = collections.value.findIndex(c => c.id === collection.id);
        if (index !== -1) {
          collections.value.splice(index, 1);
        }
      }
      
      console.debug('[Chrono Manager](Store) - Successfully destroyed collection');
      
      return response.success;
    } catch (error: any) {
      console.error('[Chrono Manager](Store) - Failed to destroy collection:', error);
      throw error;
    }
  }

  return {
    // State
    collections,

    // Actions
    list,
    fetch,
    fresh,
    create,
    modify,
    destroy,
  };
});