import { createStore } from 'vuex'
import { getHouseholdByPerson, getCourseByPerson, getRelationship } from './api'

const debug = process.env.NODE_ENV !== 'production'

const store = createStore({
    strict: debug,
    state: {
        persons: [],
        households: [],
        courses: [],
        relationships: [],
        householdLoadingIds: [],
    },
    getters: {
        nodes(state) {
            let nodes = []
            state.persons.forEach(p => {
                nodes.push(p)
            })
            state.households.forEach(h => {
                nodes.push(h)
            })
            return nodes
        },
        edges(state) {
            let edges = []
            state.relationships.forEach(r => {
                edges.push(r)
            })
            return edges
        },
        isHouseholdLoading: (state) => (household_id) => {
            return state.householdLoadingIds.includes(household_id)
        },
    },
    mutations: {
        addPerson(state, person) {
            console.log('+ addPerson', person.id)
            person.label = person.text          // vis need label
            person.id = `person_${person.id}`   // vis need unique id
            state.persons.push(person)
        },
        addHousehold(state, household) {
            console.log('+ addHousehold', household.id)
            household.label = `Ménage n° ${household.id}`   // vis need label
            household.id = `household_${household.id}`      // vis need unique id
            state.households.push(household)
        },
        addCourse(state, course) {
           console.log('+ addCourse', course.id)
           state.courses.push(course)
        },
        addRelationship(state, relationship) {
           console.log('+ addRelationship', relationship)
           state.relationships.push(relationship)
        },
        markHouseholdLoading(state, id) {
            console.log('..loading household', id)
            state.householdLoadingIds.push(id)
        },
        unmarkHouseholdLoading(state, id) {
            state.householdLoadingIds = state.householdLoadingIds.filter(i => i !== id)
        },
    },
    actions: {
        addPerson({ commit, dispatch }, person) {
            commit('addPerson', person)
            dispatch('fetchInfoForPerson', person)
        },
        fetchInfoForPerson({ dispatch }, person) {
            dispatch('fetchHouseholdForPerson', person)
            //dispatch('fetchCourseByPerson', person)
            //dispatch('fetchRelationship', person)
        },

        /**
         *  Fetch person current household if it is not already loading
         *  check first isHouseholdLoading to fetch household once
         */
        fetchHouseholdForPerson({ commit, getters, dispatch }, person) {
            console.log('  isHouseholdLoading ?', getters.isHouseholdLoading(person.current_household_id))
            if (! getters.isHouseholdLoading(person.current_household_id)) {
                commit('markHouseholdLoading', person.current_household_id)
                getHouseholdByPerson(person)
                    .then(household => new Promise(resolve => {
                        //console.log('getHouseholdByPerson', household)
                        commit('addHousehold', household)
                        dispatch('addLinkFromPersonsToHousehold', household)
                        resolve()
                        })
                    ).catch( () => {
                        commit('unmarkHouseholdLoading', person.current_household_id)
                })
            }
        },

        addLinkFromPersonsToHousehold({ commit }, household) {
            const members = household.members.filter(v => household.current_members_id.includes(v.id))
            members.forEach(m => {
                //console.log('-> addLink from person', m.person.id, 'to household', m.person.current_household_id)
                commit('addRelationship', {
                    from: `${m.person.type}_${m.person.id}`,
                    to: `household_${m.person.current_household_id}`,
                    id: `p${m.person.id}-h${m.person.current_household_id}`
                })
            })

        },

        /**
         *  Fetch person current AccompanyingCourses
         */
        fetchCourseByPerson({ commit, getters }, person) {
            console.log('fetchCourseByPerson', person)
            getCourseByPerson(person)
                .then(course => new Promise(resolve => {
                    console.log('getCourseByPerson', course)
                    commit('addCourse', course)
                    resolve()
                }))

        },

        /**
         *  Fetch Relationship
         */
        fetchRelationship({ commit, getters }, person) {
            console.log('fetchRelationship', person)
            getRelationship(person)
                .then(relationship => new Promise(resolve => {
                    console.log('getRelationship', relationship)
                    commit('addRelationship', relationship)
                    resolve()
                }))

        },

    }
})

export { store }