<template>
  <div class="main d-flex">
    <Sidebar v-bind:isOverlay="false"></Sidebar>
    <div class="d-flex content flex-column">
        <div class="d-flex flex-row">
          <div :class="userlistStyle">
            <div class="card">
                <div class="card-header shadow-sm text-white bg-info mb-3">
                  Users
                </div>
                <div class="card-body">
                  <table id="datatable" :class="tableStyle">
                    <thead>
                      <tr>
                        <th scope="col" @click="sortBy('user')" ><span>Username&nbsp;<i v-if="sortCriterion=='user'" class="fa fa-angle-down"></i></span></th>
                        <th scope="col" @click="sortBy('country')"><span>Country&nbsp;<i v-if="sortCriterion=='country'" class="fa fa-angle-down"></i></span></th>
                        <th scope="col" @click="sortBy('email')"><span>Email&nbsp;<i v-if="sortCriterion=='email'" class="fa fa-angle-down"></i></span></th>
                        <th scope="col" @click="sortBy('role')"><span>Role&nbsp;<i v-if="sortCriterion=='role'" class="fa fa-angle-down"></i></span></th>
                        <th scope="col"></th>
                      </tr>
                    </thead>
                    <tbody>
                    <tr v-for="user in users" :key="user.user" @click="selectUser(user.user)">
                      <td>{{ user.user }}</td>
                      <td>{{ user.country }}</td>
                      <td>{{ user.email}}</td>
                      <td>{{ user.role }}</td>
                      <td><i @click="deleteUser(user.user)" class="fa fa-trash-o"></i></td>
                      </tr>
                    </tbody>
                </table>
              </div>
              <div><i @click="prevPage" v-if="this.currentPage!=1" class="pages fa fa-caret-left"></i> {{this.currentPage}} / {{this.pages}} <i @click="nextPage" class="pages fa fa-caret-right"></i></div>
                <div class="adduser">
                  <button @click="addUser" class="btn btn-info pull-right shadow-sm">Add User</button>
                </div>
            </div>
          </div>
          <Userdetail v-if="isUserDetailsVisible"></Userdetail>
      </div>
    </div>
  </div>
</template>

<style lang="scss">
@import "../assets/application.scss";
.main {
  height: 100vh;
}

.content {
  margin-top: $large-offset;
  margin-left: auto;
  margin-right: auto;
}

.adduser {
  margin-right: $offset;
  padding-bottom: $offset;
}

.userlist {
  margin-top: $large-offset;
  margin-right: $offset;
  min-width: 520px;
}

.userlistsmall {
  width: 35vw;
}

.userlistextended {
  width: 70vw;
}

.table {
  width: 90% !important;
  margin: auto;
}

.table th,
.pages {
  cursor: pointer;
}

.table th,
td {
  font-size: 0.9rem;
  border-top: 0px !important;
  text-align: left;
  padding: 0.5rem !important;
}

.table td {
  font-size: 0.9rem;
  cursor: pointer;
}

tr span {
  display: flex;
}
</style>

<script>
import Sidebar from "../components/Sidebar";
import Userdetail from "../components/Userdetail";
import store from "../store";
import { mapGetters } from "vuex";
import { displayError } from "../lib/errors.js";

export default {
  name: "userview",
  data() {
    return {
      sortCriterion: "user",
      pageSize: 10,
      currentPage: 1
    };
  },
  components: {
    Sidebar,
    Userdetail
  },
  computed: {
    ...mapGetters("usermanagement", ["isUserDetailsVisible"]),
    users() {
      let users = [...this.$store.getters["usermanagement/users"]];
      users.sort((a, b) => {
        if (
          a[this.sortCriterion].toLowerCase() <
          b[this.sortCriterion].toLowerCase()
        )
          return -1;
        if (
          a[this.sortCriterion].toLowerCase() >
          b[this.sortCriterion].toLowerCase()
        )
          return 1;
        return 0;
      });
      const start = (this.currentPage - 1) * this.pageSize;
      return users.slice(start, start + this.pageSize);
    },
    pages() {
      let users = [...this.$store.getters["usermanagement/users"]];
      return Math.ceil(users.length / this.pageSize);
    },
    tableStyle() {
      return {
        table: true,
        "table-hover": true,
        "table-sm": this.isUserDetailsVisible,
        fadeIn: true,
        animated: true
      };
    },
    userlistStyle() {
      return {
        userlist: true,
        shadow: true,
        userlistsmall: this.isUserDetailsVisible,
        userlistextended: !this.isUserDetailsVisible
      };
    }
  },
  methods: {
    tween() {},
    nextPage() {
      if (this.currentPage < this.pages) {
        document.querySelector("#datatable").classList.add("fadeOut");
        setTimeout(() => {
          document.querySelector("#datatable").classList.remove("fadeOut");
          this.currentPage += 1;
        }, 10);
      }
      return;
    },
    prevPage() {
      if (this.currentPage > 0) {
        document.querySelector("#datatable").classList.add("fadeOut");
        setTimeout(() => {
          document.querySelector("#datatable").classList.remove("fadeOut");
          this.currentPage -= 1;
        }, 10);
      }
      return;
    },
    sortBy(criterion) {
      this.sortCriterion = criterion;
    },
    deleteUser(name) {
      this.$store
        .dispatch("usermanagement/deleteUser", { name: name })
        .then(() => {
          this.submitted = false;
          this.$store.dispatch("usermanagement/loadUsers").catch(error => {
            const { status, data } = error.response;
            displayError({
              title: "Backend Error",
              message: `${status}: ${data.message}`
            });
          });
        })
        .catch(error => {
          const { status, data } = error.response;
          displayError({
            title: "Backend Error",
            message: `${status}: ${data.message}`
          });
        });
    },
    addUser() {
      this.$store.commit("usermanagement/clearCurrentUser");
      this.$store.commit("usermanagement/setUserDetailsVisible");
    },
    selectUser(name) {
      const user = this.$store.getters["usermanagement/getUserByName"](name);
      this.$store.commit("usermanagement/setCurrentUser", user);
    }
  },
  beforeRouteEnter(to, from, next) {
    store
      .dispatch("usermanagement/loadUsers")
      .then(next)
      .catch(error => {
        const { status, data } = error.response;
        displayError({
          title: "Backend Error",
          message: `${status}: ${data}`
        });
      });
  },
  beforeRouteLeave(to, from, next) {
    store.commit("usermanagement/clearCurrentUser");
    store.commit("usermanagement/setUserDetailsInvisible");
    next();
  }
};
</script>