<script>
import { mapGetters, mapState, mapActions } from 'vuex';
import tooltip from '../../vue_shared/directives/tooltip';
import icon from '../../vue_shared/components/icon.vue';
import modal from '../../vue_shared/components/modal.vue';
import commitFilesList from './commit_sidebar/list.vue';

export default {
  components: {
    modal,
    icon,
    commitFilesList,
  },
  directives: {
    tooltip,
  },
  data() {
    return {
      showNewBranchModal: false,
      submitCommitsLoading: false,
      startNewMR: false,
      commitMessage: '',
    };
  },
  computed: {
    ...mapState([
      'currentProjectId',
      'currentBranchId',
      'rightPanelCollapsed',
    ]),
    ...mapGetters([
      'changedFiles',
    ]),
    commitButtonDisabled() {
      return this.commitMessage === '' || this.submitCommitsLoading || !this.changedFiles.length;
    },
    commitMessageCount() {
      return this.commitMessage.length;
    },
  },
  methods: {
    ...mapActions([
      'checkCommitStatus',
      'commitChanges',
      'getTreeData',
      'setPanelCollapsedStatus',
    ]),
    makeCommit(newBranch = false) {
      const createNewBranch = newBranch || this.startNewMR;

      const payload = {
        branch: createNewBranch ?
          `${this.currentBranchId}-${new Date().getTime().toString()}` :
          this.currentBranchId,
        commit_message: this.commitMessage,
        actions: this.changedFiles.map(f => ({
          action: f.tempFile ? 'create' : 'update',
          file_path: f.path,
          content: f.content,
          encoding: f.base64 ? 'base64' : 'text',
        })),
        start_branch: createNewBranch ? this.currentBranchId : undefined,
      };

      this.showNewBranchModal = false;
      this.submitCommitsLoading = true;

      this.commitChanges({ payload, newMr: this.startNewMR })
        .then(() => {
          this.submitCommitsLoading = false;
          this.$store.dispatch('getTreeData', {
            projectId: this.currentProjectId,
            branch: this.currentBranchId,
            endpoint: `/tree/${this.currentBranchId}`,
            force: true,
          });
        })
        .catch(() => {
          this.submitCommitsLoading = false;
        });
    },
    tryCommit() {
      this.submitCommitsLoading = true;

      this.checkCommitStatus()
        .then((branchChanged) => {
          if (branchChanged) {
            this.showNewBranchModal = true;
          } else {
            this.makeCommit();
          }
        })
        .catch(() => {
          this.submitCommitsLoading = false;
        });
    },
    toggleCollapsed() {
      this.setPanelCollapsedStatus({
        side: 'right',
        collapsed: !this.rightPanelCollapsed,
      });
    },
  },
};
</script>

<template>
  <div class="multi-file-commit-panel-section">
    <modal
      v-if="showNewBranchModal"
      :primary-button-label="__('Create new branch')"
      kind="primary"
      :title="__('Branch has changed')"
      :text="__(`This branch has changed since
you started editing. Would you like to create a new branch?`)"
      @cancel="showNewBranchModal = false"
      @submit="makeCommit(true)"
    />
    <commit-files-list
      title="Staged"
      :file-list="changedFiles"
      :collapsed="rightPanelCollapsed"
      @toggleCollapsed="toggleCollapsed"
    />
    <form
      class="form-horizontal multi-file-commit-form"
      @submit.prevent="tryCommit"
      v-if="!rightPanelCollapsed"
    >
      <div class="multi-file-commit-fieldset">
        <textarea
          class="form-control multi-file-commit-message"
          name="commit-message"
          v-model="commitMessage"
          placeholder="Commit message"
        >
        </textarea>
      </div>
      <div class="multi-file-commit-fieldset">
        <label
          v-tooltip
          title="Create a new merge request with these changes"
          data-container="body"
          data-placement="top"
        >
          <input
            type="checkbox"
            v-model="startNewMR"
          />
          Merge Request
        </label>
        <button
          type="submit"
          :disabled="commitButtonDisabled"
          class="btn btn-default btn-sm append-right-10 prepend-left-10"
        >
          <i
            v-if="submitCommitsLoading"
            class="js-commit-loading-icon fa fa-spinner fa-spin"
            aria-hidden="true"
            aria-label="loading"
          >
          </i>
          Commit
        </button>
        <div
          class="multi-file-commit-message-count"
        >
          {{ commitMessageCount }}
        </div>
      </div>
    </form>
  </div>
</template>
