import Vue from 'vue'

import api from '@/api'
import {
  DATA_LEVELS,
  ID_VARIANTS,
  RELATIONS // FIXME REMOVE WHEN DB MAJ
} from '@/store/utils'
import {
  AllNodesOfVariant
} from '@/api/queries'


export default {
  state: {
    nodes: {},

    history: [],

    // IDS
    ids: {
      // depart: undefined,
      // kit: undefined,
      // creation: undefined
    }
  },

  mutations: {
    'SET_ALL_NODES_IDS' (state, [variant, nodes]) {
      Vue.set(state.ids, variant, nodes.map(({ id }) => id))
    },

    'ADD_NODES' (state, [nodes, dataLevel]) {
      for (const node of nodes) {
        const stateNode = node.id in state.nodes ? state.nodes[node.id] : undefined
        // FIXME UPDATE AFTER DB MAJ
        if (node.variant === null || Array.isArray(node.variant)) {
          node.variant = node.variant !== null ? ID_VARIANTS[node.variant[0].id] : 'dark'
        }
        if (node.type) {
          node.type = node.type === 'texte' ? 'ref' : 'prod'
        }
        // FIXME REMOVE AFTER DB MAJ
        for (const relation of RELATIONS) {
          if (relation in node && node[relation]) {
            node[relation] = node[relation].map(subNode => {
              if (!(subNode.id in state.nodes)) {
                subNode.variant = subNode.variant !== null ? ID_VARIANTS[subNode.variant[0].id] : 'black'
                subNode.dataLevel = -1
                Vue.set(state.nodes, subNode.id, subNode)
              }
              return state.nodes[subNode.id]
            })
          }
          if (node[relation] === null) {
            node[relation] = []
          }
        }
        if (!stateNode || stateNode.dataLevel < dataLevel) {
          node.dataLevel = dataLevel
        }
        Vue.set(state.nodes, node.id, stateNode ? { ...stateNode, ...node } : node)
      }
    }
  },

  actions: {
    async 'GET_ALL_NODES_IDS' ({ state, commit }, variant) {
      if (state.ids[variant] === undefined) {
        // FIXME UPDATE WHEN QUERY OK
        // await api.query(AllNodesOfVariant, { variantId: VARIANT_IDS[variant] }).then(data => {
        await api.query(AllNodesOfVariant).then(data => {
          commit('SET_ALL_NODES_IDS', [variant, data.nodes])
        })
      }
      return state.ids[variant]
    },

    async 'GET_NODES' ({ state, commit, getters }, { ids, dataLevel = 'partial' }) {
      const lvl = DATA_LEVELS[dataLevel]
      const nodesIdsToQuery = []
      let lowestLvl = lvl
      for (const id of ids) {
        const nodeLvl = id in state.nodes ? state.nodes[id].dataLevel : -1
        if (nodeLvl < lvl) {
          nodesIdsToQuery.push(id)
        }
        if (nodeLvl < lowestLvl) {
          lowestLvl = nodeLvl
        }
      }

      if (nodesIdsToQuery.length) {
        const levelsToQuery = Array(lvl - lowestLvl).fill(lowestLvl + 1).map((v, i) => v + i)
        await api.queryNodes(nodesIdsToQuery, levelsToQuery).then(data => {
          commit('ADD_NODES', [data.nodes, lvl])
        })
      }

      return getters.nodes(ids)
    },

    async 'GET_NODE' ({ state, commit, getters }, { id, dataLevel = 'full' }) {
      const lvl = DATA_LEVELS[dataLevel]
      const nodeLvl = id in state.nodes ? state.nodes[id].dataLevel : -1
      if (nodeLvl < lvl) {
        const levelsToQuery = Array(lvl - nodeLvl).fill(nodeLvl + 1).map((v, i) => v + i)
        await api.queryNode(id, levelsToQuery).then(data => {
          commit('ADD_NODES', [[data.node], lvl])
        })
      }

      return getters.node(id)
    }
  },

  getters: {
    allNodes: state => state.nodes,
    // Args getters
    nodes: state => ids => ids.map(id => state.nodes[id]),
    node: state => id => state.nodes[id]
  }
}