import { defineStore } from 'pinia'

// main is the name of the store. It is unique across your application
// and will appear in devtools
export const useMainStore = defineStore('main', {
  // a function that returns a fresh state
  state: () => ({
    counter: 0,
    name: 'Eduardo',
  }),
  // optional getters
  getters: {
    // getters receive the state as first parameter
    doubleCounter: (state) => state.counter * 2,
    // use getters in other getters
    doubleCounterPlusOne(): number {
      return this.doubleCounter   1
    },
  },
  // optional actions
  actions: {
    reset() {
      // `this` is the store instance
      this.counter = 0
    },
  },
})

import { useMainStore } from '@/stores/main'
import { storeToRefs } from 'pinia'

export default defineComponent({
  setup() {
    const main = useMainStore()

    // extract specific store properties
    const { counter, doubleCounter } = storeToRefs(main)

    return {
      // gives access to the whole store in the template
      main,
      // gives access only to specific state or getter
      counter,
      doubleCounter,
    }
  },
})