<template>
  <QuickNav selected="Projects"></QuickNav>
  <TopMessage />

  <section id="Content" class="p-6 pb-24 max-w-3xl mx-auto">
    <!-- Heading -->
    <h1 id="ViewHeading" class="text-4xl text-center font-light pt-4 mb-8">
      Your Ideas
    </h1>

    <!-- Result Tabs -->
    <div class="text-center text-slate-500 border-b border-slate-300">
      <ul class="flex flex-wrap justify-center gap-4 -mb-px">
        <li>
          <a
            href="#"
            @click="
              offers = [];
              projects = [];
              showOffers = true;
              showProjects = false;
              loadOffers();
            "
            v-bind:class="computedOfferTabClassNames()"
          >
            Offers
          </a>
        </li>
        <li>
          <a
            href="#"
            @click="
              offers = [];
              projects = [];
              showOffers = false;
              showProjects = true;
              loadProjects();
            "
            v-bind:class="computedProjectTabClassNames()"
          >
            Projects
          </a>
        </li>
      </ul>
    </div>

    <!-- Quick Search -->
    <!--
    <div id="QuickSearch" class="mb-4 flex">
      <input
        type="text"
        placeholder="Search…"
        class="block w-full rounded-l border border-r-0 border-slate-400 px-3 py-2"
      />
      <button
        class="px-4 rounded-r bg-slate-200 border border-l-0 border-slate-400"
      >
        <fa icon="magnifying-glass" class="fa-fw"></fa>
      </button>
    </div>
    -->

    <!-- New Project -->
    <button
      v-if="showProjects"
      class="fixed right-6 bottom-24 text-center text-4xl leading-none bg-blue-600 text-white w-14 py-2.5 rounded-full"
      @click="onClickNewProject()"
    >
      <fa icon="plus" class="fa-fw"></fa>
    </button>

    <!-- Loading Animation -->
    <div
      class="fixed left-6 bottom-24 text-center text-4xl leading-none bg-slate-400 text-white w-14 py-2.5 rounded-full"
      v-if="isLoading"
    >
      <fa icon="spinner" class="fa-spin-pulse"></fa>
    </div>

    <!-- Offer Results List -->
    <InfiniteScroll v-if="showOffers" @reached-bottom="loadMoreOfferData">
      <ul class="border-t border-slate-300">
        <li
          class="border-b border-slate-300"
          v-for="offer in offers"
          :key="offer.handleId"
        >
          <div class="block py-4 flex gap-4">
            <div v-if="offer.fulfillsPlanHandleId" class="flex-none w-12">
              <ProjectIcon
                :entityId="offer.fulfillsPlanHandleId"
                :iconSize="48"
                class="inline-block align-middle border border-slate-300 rounded-md"
              ></ProjectIcon>
            </div>
            <div v-if="offer.recipientDid" class="flex-none w-12">
              <EntityIcon
                :entityId="offer.recipientDid"
                :iconSize="48"
                class="inline-block align-middle border border-slate-300 rounded-md"
              />
            </div>

            <div>
              <div>
                {{ offer.objectDescription }}
              </div>

              <span class="text-sm">
                <span v-if="offer.amount">
                  <fa
                    :icon="libsUtil.iconForUnitCode(offer.unit)"
                    class="fa-fw text-slate-400"
                  />

                  <span v-if="offer.amountGiven >= offer.amount">
                    <fa icon="check-circle" class="fa-fw text-green-500" />
                    All {{ offer.amount }} given
                  </span>
                  <span v-else>
                    <fa
                      icon="triangle-exclamation"
                      class="fa-fw text-yellow-500"
                    />
                    {{ offer.amountGiven ? "" : "All" }}
                    {{ offer.amount - (offer.amountGiven || 0) }} remaining
                  </span>

                  <span v-if="offer.amountGiven > 0">
                    <span class="text-sm text-slate-400">
                      ({{ offer.amountGiven }} given,
                      <span
                        v-if="offer.amountGivenConfirmed >= offer.amountGiven"
                      >
                        <!-- no need for green icon; unnecessary if there's already a green, confusing if there's a yellow -->
                        all
                      </span>
                      <span v-else>
                        <!-- only show icon if there's not already a warning -->
                        <fa
                          v-if="offer.amountGiven >= offer.amount"
                          icon="triangle-exclamation"
                          class="fa-fw text-yellow-300"
                        />
                        {{ offer.amountGivenConfirmed || 0 }}
                      </span>
                      of that is confirmed)
                    </span>
                  </span>
                </span>
                <span v-else>
                  <!-- Non-amount offer -->
                  <span v-if="offer.nonAmountGivenConfirmed">
                    <fa icon="check-circle" class="fa-fw text-green-500" />
                    {{ offer.nonAmountGivenConfirmed }}
                    {{ offer.nonAmountGivenConfirmed == 1 ? "give" : "gives" }}
                    are confirmed.
                  </span>
                  <span v-else>
                    <fa
                      icon="triangle-exclamation"
                      class="fa-fw text-yellow-500"
                    />
                    <span class="text-sm">Not confirmed by anyone</span>
                  </span>
                </span>

                <a @click="onClickLoadClaim(offer.jwtId)">
                  <fa
                    icon="file-lines"
                    class="pl-2 text-blue-500 cursor-pointer"
                  ></fa>
                </a>
              </span>
            </div>
          </div>
        </li>
      </ul>
    </InfiniteScroll>
    <!-- Project Results List -->
    <InfiniteScroll v-if="showProjects" @reached-bottom="loadMoreProjectData">
      <ul class="border-t border-slate-300">
        <li
          class="border-b border-slate-300"
          v-for="project in projects"
          :key="project.handleId"
        >
          <a
            @click="onClickLoadProject(project.handleId)"
            class="block py-4 flex gap-4"
          >
            <div class="flex-none w-12">
              <ProjectIcon
                :entityId="project.handleId"
                :iconSize="48"
                class="inline-block align-middle border border-slate-300 rounded-md"
              ></ProjectIcon>
            </div>

            <div class="grow overflow-hidden">
              <h2 class="text-base font-semibold">{{ project.name }}</h2>
              <div class="text-sm truncate">
                {{ project.description }}
              </div>
            </div>
          </a>
        </li>
      </ul>
    </InfiniteScroll>
  </section>
</template>

<script lang="ts">
import { Component, Vue } from "vue-facing-decorator";

import { NotificationIface } from "@/constants/app";
import { accountsDB, db } from "@/db/index";
import { MASTER_SETTINGS_KEY } from "@/db/tables/settings";
import { accessToken } from "@/libs/crypto";
import * as libsUtil from "@/libs/util";
import { IIdentifier } from "@veramo/core";
import InfiniteScroll from "@/components/InfiniteScroll.vue";
import QuickNav from "@/components/QuickNav.vue";
import ProjectIcon from "@/components/ProjectIcon.vue";
import TopMessage from "@/components/TopMessage.vue";
import { OfferSummaryRecord, PlanData } from "@/libs/endorserServer";
import EntityIcon from "@/components/EntityIcon.vue";

@Component({
  components: { EntityIcon, InfiniteScroll, QuickNav, ProjectIcon, TopMessage },
})
export default class ProjectsView extends Vue {
  $notify!: (notification: NotificationIface, timeout?: number) => void;

  apiServer = "";
  projects: PlanData[] = [];
  currentIid: IIdentifier;
  isLoading = false;
  numAccounts = 0;
  offers: OfferSummaryRecord[] = [];
  showOffers = true;
  showProjects = false;

  libsUtil = libsUtil;

  /**
   * 'created' hook runs when the Vue instance is first created
   **/
  async created() {
    try {
      await db.open();
      const settings = await db.settings.get(MASTER_SETTINGS_KEY);
      const activeDid: string = (settings?.activeDid as string) || "";
      this.apiServer = (settings?.apiServer as string) || "";

      await accountsDB.open();
      this.numAccounts = await accountsDB.accounts.count();
      if (this.numAccounts === 0) {
        console.error("No accounts found.");
        this.$notify(
          {
            group: "alert",
            type: "danger",
            title: "Error",
            text: "You need an identifier to load your projects.",
          },
          -1,
        );
      } else {
        this.currentIid = await this.getIdentity(activeDid);
        await this.loadOffers();
      }
    } catch (err) {
      console.error("Error initializing:", err);
      this.$notify(
        {
          group: "alert",
          type: "danger",
          title: "Error",
          text: "Something went wrong loading your projects.",
        },
        -1,
      );
    }
  }

  /**
   * Core project data loader
   * @param url the url used to fetch the data
   * @param token Authorization token
   **/
  async projectDataLoader(url: string, token: string) {
    const headers: { [key: string]: string } = {
      "Content-Type": "application/json",
      Authorization: `Bearer ${token}`,
    };

    try {
      this.isLoading = true;
      const resp = await this.axios.get(url, { headers });
      if (resp.status === 200 && resp.data.data) {
        const plans: PlanData[] = resp.data.data;
        for (const plan of plans) {
          const { name, description, handleId, issuerDid, rowid } = plan;
          this.projects.push({ name, description, handleId, issuerDid, rowid });
        }
      } else {
        console.error(
          "Bad server response & data for plans:",
          resp.status,
          resp.data,
        );
        this.$notify(
          {
            group: "alert",
            type: "danger",
            title: "Error",
            text: "Failed to get projects from the server. Try again later.",
          },
          -1,
        );
      }
      // eslint-disable-next-line @typescript-eslint/no-explicit-any
    } catch (error: any) {
      console.error("Got error loading plans:", error.message || error);
      this.$notify(
        {
          group: "alert",
          type: "danger",
          title: "Error",
          text: "Got an error loading projects.",
        },
        -1,
      );
    } finally {
      this.isLoading = false;
    }
  }

  /**
   * Data loader used by infinite scroller
   * @param payload is the flag from the InfiniteScroll indicating if it should load
   **/
  async loadMoreProjectData(payload: boolean) {
    if (this.projects.length > 0 && payload) {
      const latestProject = this.projects[this.projects.length - 1];
      await this.loadProjects(
        this.currentIid,
        `beforeId=${latestProject.rowid}`,
      );
    }
  }

  /**
   * Load projects initially
   * @param identifier of the user
   * @param urlExtra additional url parameters in a string
   **/
  async loadProjects(identifier?: IIdentifier, urlExtra: string = "") {
    const identity = identifier || this.currentIid;
    const url = `${this.apiServer}/api/v2/report/plansByIssuer?${urlExtra}`;
    const token: string = await accessToken(identity);
    await this.projectDataLoader(url, token);
  }

  public async getIdentity(activeDid: string): Promise<IIdentifier> {
    await accountsDB.open();
    const account = await accountsDB.accounts
      .where("did")
      .equals(activeDid)
      .first();
    const identity = JSON.parse((account?.identity as string) || "null");

    if (!identity) {
      throw new Error(
        "Attempted to load project records with no identifier available.",
      );
    }
    return identity;
  }

  /**
   * Handle clicking on a project entry found in the list
   * @param id of the project
   **/
  onClickLoadProject(id: string) {
    localStorage.setItem("projectId", id);
    const route = {
      path: "/project/" + encodeURIComponent(id),
    };
    this.$router.push(route);
  }

  /**
   * Handling clicking on the new project button
   **/
  onClickNewProject(): void {
    localStorage.removeItem("projectId");
    const route = {
      name: "new-edit-project",
    };
    this.$router.push(route);
  }

  onClickLoadClaim(jwtId: string) {
    const route = {
      path: "/claim/" + encodeURIComponent(jwtId),
    };
    this.$router.push(route);
  }

  /**
   * Core offer data loader
   * @param url the url used to fetch the data
   * @param token Authorization token
   **/
  async offerDataLoader(url: string, token: string) {
    const headers: { [key: string]: string } = {
      "Content-Type": "application/json",
      Authorization: `Bearer ${token}`,
    };

    try {
      this.isLoading = true;
      const resp = await this.axios.get(url, { headers });
      if (resp.status === 200 && resp.data.data) {
        this.offers = this.offers.concat(resp.data.data);
      } else {
        console.error(
          "Bad server response & data for offers:",
          resp.status,
          resp.data,
        );
        this.$notify(
          {
            group: "alert",
            type: "danger",
            title: "Error",
            text: "Failed to get offers from the server. Try again later.",
          },
          -1,
        );
      }
      // eslint-disable-next-line @typescript-eslint/no-explicit-any
    } catch (error: any) {
      console.error("Got error loading offers:", error.message || error);
      this.$notify(
        {
          group: "alert",
          type: "danger",
          title: "Error",
          text: "Got an error loading offers.",
        },
        -1,
      );
    } finally {
      this.isLoading = false;
    }
  }

  /**
   * Data loader used by infinite scroller
   * @param payload is the flag from the InfiniteScroll indicating if it should load
   **/
  async loadMoreOfferData(payload: boolean) {
    if (this.offers.length > 0 && payload) {
      const latestOffer = this.offers[this.offers.length - 1];
      await this.loadOffers(this.currentIid, `&beforeId=${latestOffer.jwtId}`);
    }
  }

  /**
   * Load offers initially
   * @param identifier of the user
   * @param urlExtra additional url parameters in a string
   **/
  async loadOffers(identifier?: IIdentifier, urlExtra: string = "") {
    const identity = identifier || this.currentIid;
    const url = `${this.apiServer}/api/v2/report/offers?offeredByDid=${identity.did}${urlExtra}`;
    const token: string = await accessToken(identity);
    await this.offerDataLoader(url, token);
  }

  public computedOfferTabClassNames() {
    return {
      "inline-block": true,
      "py-3": true,
      "rounded-t-lg": true,
      "border-b-2": true,

      active: this.showOffers,
      "text-black": this.showOffers,
      "border-black": this.showOffers,
      "font-semibold": this.showOffers,

      "text-blue-600": !this.showOffers,
      "border-transparent": !this.showOffers,
      "hover:border-slate-400": !this.showOffers,
    };
  }

  public computedProjectTabClassNames() {
    return {
      "inline-block": true,
      "py-3": true,
      "rounded-t-lg": true,
      "border-b-2": true,

      active: this.showProjects,
      "text-black": this.showProjects,
      "border-black": this.showProjects,
      "font-semibold": this.showProjects,

      "text-blue-600": !this.showProjects,
      "border-transparent": !this.showProjects,
      "hover:border-slate-400": !this.showProjects,
    };
  }
}
</script>
