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

  <!-- CONTENT -->
  <section id="Content" class="p-2 pb-24 max-w-3xl mx-auto">
    <h1 id="ViewHeading" class="text-4xl text-center font-light px-4 mb-8">
      Time Safari
    </h1>

    <!-- prompt to install notifications -->
    <div class="mb-8">
      <div
        v-if="!notificationsSupported()"
        class="bg-amber-200 rounded-md overflow-hidden text-center px-4 py-3 mb-4"
      >
        <p style="display: inline; align-items: center">
          This currently doesn't support notifications, so let's fix that.
          <br />
          <!-- Note that that exact verbiage shows in the help. -->

          <span v-if="userAgentInfo.getOS().name === 'iOS'">
            Tap on "Share"<img
              src="../assets/help/apple-share-icon.svg"
              alt="Apple 'share' icon"
              width="30"
              style="display: inline; margin: 0 5px; vertical-align: middle"
            />and then "Add to Home Screen"
            <fa icon="square-plus" title="Apple 'Add' icon" />
            and go click on that new app.
          </span>
          <span
            v-else-if="userAgentInfo.getBrowser()?.name?.startsWith('Chrome')"
          >
            You should see a prompt to install, or you can click on the
            top-right dots
            <fa
              icon="ellipsis-vertical"
              title="vertical ellipsis"
              class="fa-fw"
            />
            and then "Install"<img
              src="../assets/help/install-android-chrome.png"
              alt="Android 'install' icon"
              width="30"
              style="display: inline; margin: 0 5px; vertical-align: middle"
            />
            and go use that app. If you already did these steps, reload this app
            so that it is fully detected.
          </span>
          <span v-else>
            Try
            <a href="https://www.google.com/chrome/" class="text-blue-500"
              >Google Chrome</a
            >
            or look for a way to install as an app from this browser.
          </span>
        </p>
      </div>
    </div>

    <div v-if="showShortcutBvc" class="mb-4">
      <router-link
        :to="{ name: 'quick-action-bvc' }"
        class="block text-center text-md font-bold bg-gradient-to-b from-blue-400 to-blue-700 shadow-[inset_0_-1px_0_0_rgba(0,0,0,0.5)] text-white mt-2 px-2 py-3 rounded-md"
      >
        Bountiful Voluntaryist Community Actions</router-link
      >
    </div>

    <!-- show the actions for recognizing a give -->
    <div class="mb-8">
      <div v-if="isCreatingIdentifier">
        <p class="text-slate-500 text-center italic mt-4 mb-4">
          <fa icon="spinner" class="fa-spin-pulse"></fa> Loading&hellip;
        </p>
      </div>
      <div
        v-if="!activeDid && !isCreatingIdentifier"
        class="bg-amber-200 rounded-md overflow-hidden text-center px-4 py-3 mb-4"
      >
        <p class="text-lg mb-3">
          Want to connect with your contacts, or share contributions or
          projects?
        </p>
        <router-link
          :to="{ name: 'start' }"
          class="block text-center text-md font-bold bg-gradient-to-b from-blue-400 to-blue-700 shadow-[inset_0_-1px_0_0_rgba(0,0,0,0.5)] text-white mt-2 px-2 py-3 rounded-md"
        >
          Create An Identifier</router-link
        >
      </div>

      <div
        v-else-if="!isRegistered"
        class="bg-amber-200 rounded-md overflow-hidden text-center px-4 py-3 mb-4"
      >
        Someone must register you before you can give or offer.
        <router-link
          :to="{ name: 'contact-qr' }"
          class="block text-center text-md font-bold bg-gradient-to-b from-blue-400 to-blue-700 shadow-[inset_0_-1px_0_0_rgba(0,0,0,0.5)] text-white mt-2 px-2 py-3 rounded-md"
        >
          Show Them Your Identifier Info
        </router-link>
      </div>

      <div v-else>
        <!-- activeDid && isRegistered -->
        <div class="mb-4">
          <h2 class="text-xl font-bold">Record Something Given By:</h2>
        </div>

        <ul
          class="grid grid-cols-4 sm:grid-cols-5 md:grid-cols-6 gap-x-3 gap-y-5 text-center mb-5"
        >
          <li @click="openDialog()">
            <img
              src="../assets/blank-square.svg"
              class="mx-auto border border-slate-300 rounded-md mb-1"
            />
            <h3
              class="text-xs italic font-medium text-ellipsis whitespace-nowrap overflow-hidden"
            >
              Unnamed/Unknown
            </h3>
          </li>
          <li
            v-for="contact in allContacts.slice(0, 7)"
            :key="contact.did"
            @click="openDialog(contact)"
          >
            <EntityIcon
              :contact="contact"
              :iconSize="64"
              class="mx-auto border border-slate-300 rounded-md mb-1"
            />
            <h3
              class="text-xs font-medium text-ellipsis whitespace-nowrap overflow-hidden"
            >
              {{ contact.name || contact.did }}
            </h3>
          </li>
        </ul>

        <div class="flex justify-between">
          <router-link
            v-if="allContacts.length >= 7"
            :to="{ name: 'contact-gives' }"
            class="block text-center text-md font-bold bg-gradient-to-b from-slate-400 to-slate-700 shadow-[inset_0_-1px_0_0_rgba(0,0,0,0.5)] text-white px-2 py-3 rounded-md"
          >
            Choose From All Contacts
          </router-link>
          <button
            @click="openGiftedPrompts()"
            class="block text-center text-md bg-gradient-to-b from-slate-400 to-slate-700 shadow-[inset_0_-1px_0_0_rgba(0,0,0,0.5)] text-white px-4 py-2 rounded-md"
          >
            Ideas...
          </button>
        </div>
      </div>
    </div>

    <GiftedDialog ref="customDialog" />
    <GiftedPrompts ref="giftedPrompts" />
    <FeedFilters ref="feedFilters" />

    <!-- Results List -->
    <div class="bg-slate-100 rounded-md overflow-hidden px-4 py-3 mb-4">
      <div class="flex items-center mb-4">
        <h2 class="text-xl font-bold">Latest Activity</h2>
        <button @click="openFeedFilters()" class="block text-center ml-auto">
          <span class="text-sm text-white">
            <span
              v-if="resultsAreFiltered()"
              class="bg-gradient-to-b from-blue-400 to-blue-700 shadow-[inset_0_-1px_0_0_rgba(0,0,0,0.5)] px-3 py-1.5 rounded-md"
            >
              Filtered
            </span>
            <span
              v-else
              class="bg-gradient-to-b from-slate-400 to-slate-700 shadow-[inset_0_-1px_0_0_rgba(0,0,0,0.5)] px-3 py-1.5 rounded-md"
            >
              Unfiltered
            </span>
          </span>
        </button>
      </div>
      <InfiniteScroll @reached-bottom="loadMoreGives">
        <ul class="border-t border-slate-300">
          <li
            class="border-b border-slate-300 py-2"
            v-for="record in feedData"
            :key="record.jwtId"
          >
            <div
              class="border-b border-dashed border-slate-400 text-orange-400 pb-2 mb-2 font-bold text-sm"
              v-if="record.jwtId == feedLastViewedClaimId"
            >
              You've already seen all the following
            </div>

            <div class="grid grid-cols-12">
              <span class="col-span-1 justify-self-start">
                <span>
                  <fa
                    v-if="record.giver.known || record.receiver.known"
                    icon="circle-user"
                    class="pt-1 text-slate-500"
                  />
                  <fa v-else icon="gift" class="pt-1 pl-3 text-slate-500" />
                </span>
              </span>
              <span class="col-span-10 justify-self-stretch">
                <!-- show giver and/or receiver profiles... which seemed like a good idea but actually adds clutter
                <span
                  v-if="
                    record.giver.profileImageUrl ||
                    record.receiver.profileImageUrl
                  "
                >
                  <EntityIcon
                    v-if="record.agentDid !== activeDid"
                    :icon-size="32"
                    :profile-image-url="record.giver.profileImageUrl"
                    class="inline-block align-middle border border-slate-300 rounded-md mr-1"
                  />
                  <fa
                    v-if="
                      record.agentDid !== activeDid &&
                      record.recipientDid !== activeDid &&
                      !record.fulfillsPlanHandleId
                    "
                    icon="ellipsis"
                    class="text-slate"
                  />
                  <EntityIcon
                    v-if="
                      record.recipientDid !== activeDid &&
                      !record.fulfillsPlanHandleId
                    "
                    :iconSize="32"
                    :profile-image-url="record.receiver.profileImageUrl"
                    class="inline-block align-middle border border-slate-300 rounded-md ml-1"
                  />
                </span>
                -->
                <span class="pl-2">
                  {{ giveDescription(record) }}
                </span>
                <a @click="onClickLoadClaim(record.jwtId)">
                  <fa
                    icon="file-lines"
                    class="pl-2 text-blue-500 cursor-pointer"
                  ></fa>
                </a>
              </span>
              <span class="col-span-1 justify-self-end">
                <router-link
                  v-if="record.fulfillsPlanHandleId"
                  :to="
                    '/project/' +
                    encodeURIComponent(record.fulfillsPlanHandleId)
                  "
                >
                  <fa icon="hammer" class="text-blue-500"></fa>
                </router-link>
              </span>
            </div>
            <div v-if="record.image" class="flex justify-center">
              <a :href="record.image" target="_blank">
                <img :src="record.image" class="h-24 mt-2 rounded-xl" />
              </a>
            </div>
          </li>
        </ul>
      </InfiniteScroll>
      <div v-if="isFeedLoading">
        <p class="text-slate-500 text-center italic mt-4 mb-4">
          <fa icon="spinner" class="fa-spin-pulse"></fa> Loading&hellip;
        </p>
      </div>
      <div v-if="!isFeedLoading && feedData.length === 0">
        <p class="text-slate-500 text-center italic mt-4 mb-4">
          No claims match your filters.
        </p>
      </div>
    </div>
  </section>
</template>

<script lang="ts">
import { UAParser } from "ua-parser-js";
import { IIdentifier } from "@veramo/core";
import { Component, Vue } from "vue-facing-decorator";
import { Router } from "vue-router";

import EntityIcon from "@/components/EntityIcon.vue";
import GiftedDialog from "@/components/GiftedDialog.vue";
import GiftedPrompts from "@/components/GiftedPrompts.vue";
import FeedFilters from "@/components/FeedFilters.vue";
import InfiniteScroll from "@/components/InfiniteScroll.vue";
import QuickNav from "@/components/QuickNav.vue";
import TopMessage from "@/components/TopMessage.vue";
import { NotificationIface } from "@/constants/app";
import { db, accountsDB } from "@/db/index";
import { Account } from "@/db/tables/accounts";
import { Contact } from "@/db/tables/contacts";
import {
  BoundingBox,
  isAnyFeedFilterOn,
  MASTER_SETTINGS_KEY,
  Settings,
} from "@/db/tables/settings";
import { accessToken } from "@/libs/crypto";
import {
  contactForDid,
  containsNonHiddenDid,
  didInfoForContact,
  fetchEndorserRateLimits,
  getPlanFromCache,
  GiverReceiverInputInfo,
  GiveSummaryRecord,
} from "@/libs/endorserServer";
import { generateSaveAndActivateIdentity } from "@/libs/util";

interface GiveRecordWithContactInfo extends GiveSummaryRecord {
  giver: {
    displayName: string;
    known: boolean;
    profileImageUrl?: string;
  };
  image?: string;
  recipientProjectName?: string;
  receiver: {
    displayName: string;
    known: boolean;
    profileImageUrl?: string;
  };
}

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

  activeDid = "";
  allContacts: Array<Contact> = [];
  allMyDids: Array<string> = [];
  apiServer = "";
  feedData: GiveRecordWithContactInfo[] = [];
  feedPreviousOldestId?: string;
  feedLastViewedClaimId?: string;
  isAnyFeedFilterOn: boolean;
  isCreatingIdentifier = false;
  isFeedFilteredByVisible = false;
  isFeedFilteredByNearby = false;
  isFeedLoading = true;
  isRegistered = false;
  searchBoxes: Array<{
    name: string;
    bbox: BoundingBox;
  }> = [];
  showShortcutBvc = false;
  userAgentInfo = new UAParser(); // see https://docs.uaparser.js.org/v2/api/ua-parser-js/get-os.html

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

  public async getHeaders(identity: IIdentifier) {
    const token = await accessToken(identity);
    const headers = {
      "Content-Type": "application/json",
      Authorization: "Bearer " + token,
    };
    return headers;
  }

  async mounted() {
    try {
      await accountsDB.open();
      const allAccounts = await accountsDB.accounts.toArray();
      this.allMyDids = allAccounts.map((acc) => acc.did);

      await db.open();
      const settings = (await db.settings.get(MASTER_SETTINGS_KEY)) as Settings;
      this.apiServer = settings?.apiServer || "";
      this.activeDid = settings?.activeDid || "";
      this.allContacts = await db.contacts.toArray();
      this.feedLastViewedClaimId = settings?.lastViewedClaimId;
      this.isFeedFilteredByVisible = !!settings?.filterFeedByVisible;
      this.isFeedFilteredByNearby = !!settings?.filterFeedByNearby;
      this.isRegistered = !!settings?.isRegistered;
      this.searchBoxes = settings?.searchBoxes || [];
      this.showShortcutBvc = !!settings?.showShortcutBvc;

      this.isAnyFeedFilterOn = isAnyFeedFilterOn(settings);

      if (this.allMyDids.length === 0) {
        this.isCreatingIdentifier = true;
        this.activeDid = await generateSaveAndActivateIdentity();
        this.allMyDids = [this.activeDid];
        this.isCreatingIdentifier = false;
      }

      // someone may have have registered after sharing contact info
      if (!this.isRegistered && this.activeDid) {
        const identity = await this.getIdentity(this.activeDid);
        try {
          const resp = await fetchEndorserRateLimits(
            this.apiServer,
            this.axios,
            identity as IIdentifier,
          );
          if (resp.status === 200) {
            // we just needed to know that they're registered
            await db.open();
            db.settings.update(MASTER_SETTINGS_KEY, {
              isRegistered: true,
            });
            this.isRegistered = true;
          }
        } catch (e) {
          // ignore the error... just keep us unregistered
        }
      }

      // this returns a Promise but we don't need to wait for it
      await this.updateAllFeed();

      // eslint-disable-next-line @typescript-eslint/no-explicit-any
    } catch (err: any) {
      console.error("Error retrieving settings or feed.", err);
      this.$notify(
        {
          group: "alert",
          type: "danger",
          title: "Error",
          text:
            err.userMessage ||
            "There was an error retrieving your settings or the latest activity.",
        },
        -1,
      );
    }
  }

  resultsAreFiltered() {
    return this.isFeedFilteredByVisible || this.isFeedFilteredByNearby;
  }

  notificationsSupported() {
    return "Notification" in window;
  }

  public async buildHeaders() {
    const headers: HeadersInit = {
      "Content-Type": "application/json",
    };

    const identity = await this.getIdentity(this.activeDid);
    if (this.activeDid) {
      if (identity) {
        headers["Authorization"] = "Bearer " + (await accessToken(identity));
      } else {
        throw new Error(
          "An ID is chosen but there are no keys for it so it cannot be used to talk with the service. Switch your ID.",
        );
      }
    } else {
      // it's OK without auth... we just won't get any identifiers
    }
    return headers;
  }

  // only called when a setting was changed
  async reloadFeedOnChange() {
    await db.open();
    const settings = (await db.settings.get(MASTER_SETTINGS_KEY)) as Settings;
    this.isFeedFilteredByVisible = !!settings?.filterFeedByVisible;
    this.isFeedFilteredByNearby = !!settings?.filterFeedByNearby;
    this.isAnyFeedFilterOn = isAnyFeedFilterOn(settings);

    this.feedData = [];
    this.feedPreviousOldestId = undefined;
    this.updateAllFeed();
  }

  /**
   * Data loader used by infinite scroller
   * @param payload is the flag from the InfiniteScroll indicating if it should load
   **/
  public async loadMoreGives(payload: boolean) {
    // Since feed now loads projects along the way, it takes longer
    // and the InfiniteScroll component triggers a load before finished.
    // One alternative is to totally separate the project link loading.
    if (payload && !this.isFeedLoading) {
      this.updateAllFeed();
    }
  }

  latLongInAnySearchBox(lat: number, long: number) {
    for (const boxInfo of this.searchBoxes) {
      if (
        boxInfo.bbox.westLong <= long &&
        long <= boxInfo.bbox.eastLong &&
        boxInfo.bbox.minLat <= lat &&
        lat <= boxInfo.bbox.maxLat
      ) {
        return true;
      }
    }
  }

  public async updateAllFeed() {
    this.isFeedLoading = true;
    let endOfResults = true;
    await this.retrieveGives(this.apiServer, this.feedPreviousOldestId)
      .then(async (results) => {
        if (results.data.length > 0) {
          endOfResults = false;
          // include the descriptions of the giver and receiver
          const identity = await this.getIdentity(this.activeDid);
          for (const record: GiveSummaryRecord of results.data) {
            // similar code is in endorser-mobile utility.ts
            // claim.claim happen for some claims wrapped in a Verifiable Credential
            // eslint-disable-next-line @typescript-eslint/no-explicit-any
            const claim = (record.fullClaim as any).claim || record.fullClaim;
            // agent.did is for legacy data, before March 2023
            const giverDid =
              claim.agent?.identifier || (claim.agent as any)?.did; // eslint-disable-line @typescript-eslint/no-explicit-any
            // recipient.did is for legacy data, before March 2023
            const recipientDid =
              claim.recipient?.identifier || (claim.recipient as any)?.did; // eslint-disable-line @typescript-eslint/no-explicit-any

            // This has indeed proven problematic. See loadMoreGives
            // We should display it immediately and then get the plan later.
            const plan = await getPlanFromCache(
              record.fulfillsPlanHandleId,
              identity,
              this.axios,
              this.apiServer,
            );

            // check if the record should be filtered out
            let anyMatch = false;
            if (this.isFeedFilteredByVisible && containsNonHiddenDid(record)) {
              // has a visible DID so it's a keeper
              anyMatch = true;
            }
            if (!anyMatch && this.isFeedFilteredByNearby) {
              // check if the associated project has a location inside user's search box
              if (record.fulfillsPlanHandleId) {
                if (plan?.locLat && plan?.locLon) {
                  if (this.latLongInAnySearchBox(plan.locLat, plan.locLon)) {
                    anyMatch = true;
                  }
                }
              }
            }
            if (this.isAnyFeedFilterOn && !anyMatch) {
              continue;
            }

            const newRecord: GiveRecordWithContactInfo = {
              ...record,
              giver: didInfoForContact(
                giverDid,
                this.activeDid,
                contactForDid(giverDid, this.allContacts),
                this.allMyDids,
              ),
              image: claim.image,
              recipientProjectName: plan?.name as string,
              receiver: didInfoForContact(
                recipientDid,
                this.activeDid,
                contactForDid(recipientDid, this.allContacts),
                this.allMyDids,
              ),
            };
            this.feedData.push(newRecord);
          }
          this.feedPreviousOldestId =
            results.data[results.data.length - 1].jwtId;
          // The following update is only done on the first load.
          if (
            this.feedLastViewedClaimId == null ||
            this.feedLastViewedClaimId < results.data[0].jwtId
          ) {
            await db.open();
            db.settings.update(MASTER_SETTINGS_KEY, {
              lastViewedClaimId: results.data[0].jwtId,
            });
          }
        }
      })
      .catch((e) => {
        console.error("Error with feed load:", e);
        this.$notify(
          {
            group: "alert",
            type: "danger",
            title: "Feed Error",
            text: e.userMessage || "There was an error retrieving feed data.",
          },
          -1,
        );
      });
    if (this.feedData.length === 0 && !endOfResults) {
      // repeat until there's at least some data
      this.updateAllFeed();
    }
    this.isFeedLoading = false;
  }

  /**
   * Retrieve claims in reverse chronological order
   *
   * @param beforeId the earliest ID (of previous searches) to search earlier
   * @return claims in reverse chronological order
   */
  public async retrieveGives(endorserApiServer: string, beforeId?: string) {
    const beforeQuery = beforeId == null ? "" : "&beforeId=" + beforeId;
    const response = await fetch(
      endorserApiServer +
        "/api/v2/report/gives?giftNotTrade=true" +
        beforeQuery,
      {
        method: "GET",
        headers: await this.buildHeaders(),
      },
    );

    if (!response.ok) {
      throw await response.text();
    }

    const results = await response.json();

    if (results.data) {
      return results;
    } else {
      throw JSON.stringify(results);
    }
  }

  giveDescription(giveRecord: GiveRecordWithContactInfo) {
    // similar code is in endorser-mobile utility.ts
    // claim.claim happen for some claims wrapped in a Verifiable Credential
    // eslint-disable-next-line @typescript-eslint/no-explicit-any
    const claim = (giveRecord.fullClaim as any).claim || giveRecord.fullClaim;

    let gaveAmount = claim.object?.amountOfThisGood
      ? this.displayAmount(claim.object.unitCode, claim.object.amountOfThisGood)
      : "";
    if (claim.description) {
      if (gaveAmount) {
        gaveAmount = " (and " + gaveAmount + ")";
      }
      gaveAmount = claim.description + gaveAmount;
    }
    if (!gaveAmount) {
      gaveAmount = "something not described";
    }

    /**
     * Only show giver and/or receiver info first if they're named.
     * - If only giver is named, show "... gave"
     * - If only receiver is named, show "... received"
     */

    const giverInfo = giveRecord.giver;
    const recipientInfo = giveRecord.receiver;
    if (giverInfo.known && recipientInfo.known) {
      // both giver and recipient are named
      return `${giverInfo.displayName} gave to ${recipientInfo.displayName}: ${gaveAmount}`;
    } else if (giverInfo.known) {
      // giver is named but recipient is not

      // show the project name if to one
      if (giveRecord.recipientProjectName) {
        // retrieve the project name
        return `${giverInfo.displayName} gave: ${gaveAmount} (to the project ${giveRecord.recipientProjectName})`;
      }

      // it's not to a project
      return `${giverInfo.displayName} gave: ${gaveAmount} (to ${recipientInfo.displayName})`;
    } else if (recipientInfo.known) {
      // recipient is named but giver is not
      return `${recipientInfo.displayName} received: ${gaveAmount} (from ${giverInfo.displayName})`;
    } else {
      // neither giver nor recipient are named

      // show the project name if to one
      if (giveRecord.recipientProjectName) {
        // retrieve the project name
        return `${gaveAmount} (to the project ${giveRecord.recipientProjectName})`;
      }

      // it's not to a project
      let peopleInfo;
      if (giverInfo.displayName === recipientInfo.displayName) {
        peopleInfo = `between two who are ${giverInfo.displayName}`;
      } else {
        peopleInfo = `from ${giverInfo.displayName} to ${recipientInfo.displayName}`;
      }
      return gaveAmount + " (" + peopleInfo + ")";
    }
  }

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

  displayAmount(code: string, amt: number) {
    return "" + amt + " " + this.currencyShortWordForCode(code, amt === 1);
  }

  currencyShortWordForCode(unitCode: string, single: boolean) {
    return unitCode === "HUR" ? (single ? "hour" : "hours") : unitCode;
  }

  openDialog(giver?: GiverReceiverInputInfo) {
    (this.$refs.customDialog as GiftedDialog).open(
      giver,
      {
        did: this.activeDid,
        name: "you",
      },
      undefined,
      "Given by " + (giver?.name || "someone not named"),
    );
  }

  openGiftedPrompts() {
    (this.$refs.giftedPrompts as GiftedPrompts).open();
  }

  openFeedFilters() {
    (this.$refs.feedFilters as FeedFilters).open(this.reloadFeedOnChange);
  }
}
</script>
