<template>
  <QuickNav selected="Profile"></QuickNav>
  <!-- CONTENT -->
  <section id="Content" class="p-6 pb-24">
    <!-- Heading -->
    <h1 id="ViewHeading" class="text-4xl text-center font-light pt-4 mb-4">
      Your Identity
    </h1>

    <div class="flex justify-between">
      <span />
      <span class="whitespace-nowrap">
        <router-link
          :to="{ name: 'contact-qr' }"
          class="text-xs uppercase bg-slate-500 text-white px-1.5 py-1 rounded-md"
        >
          <fa icon="qrcode" class="fa-fw"></fa>
        </router-link>
      </span>
      <span />
    </div>

    <div class="flex justify-between py-2">
      <span />
      <span>
        <router-link
          :to="{ name: 'help' }"
          class="text-xs uppercase bg-blue-500 text-white px-1.5 py-1 rounded-md ml-1"
        >
          Help
        </router-link>
      </span>
    </div>

    <!-- Registration notice -->
    <!-- We won't show any loading indicator; we'll just pop the message in once we know they need it. -->
    <div
      v-if="!loadingLimits && !limits?.nextWeekBeginDateTime"
      class="bg-amber-200 text-amber-900 border-amber-500 border-dashed border text-center rounded-md overflow-hidden px-4 py-3 mb-4"
    >
      <p class="mb-4">
        <b>Note:</b> Before you can publicly announce a new project or time
        commitment, a friend needs to register you.
      </p>
      <router-link
        :to="{ name: 'contact-qr' }"
        class="inline-block text-md uppercase bg-amber-600 text-white px-4 py-2 rounded-md"
      >
        Share Your Info
      </router-link>
    </div>

    <!-- Identity Details -->
    <div class="bg-slate-100 rounded-md overflow-hidden px-4 py-3 mb-4">
      <h2 class="text-xl font-semibold mb-2">{{ firstName }} {{ lastName }}</h2>

      <div class="text-slate-500 text-sm font-bold">ID</div>
      <div class="text-sm text-slate-500 flex justify-start items-center mb-1">
        <code class="truncate">{{ activeDid }}</code>
        <button
          @click="
            doCopyTwoSecRedo(activeDid, () => (showDidCopy = !showDidCopy))
          "
          class="ml-2"
        >
          <fa icon="copy" class="text-slate-400 fa-fw"></fa>
        </button>
        <span v-show="showDidCopy">Copied!</span>
      </div>

      <div class="text-slate-500 text-sm font-bold">Public Key (base 64)</div>
      <div class="text-sm text-slate-500 flex justify-start items-center mb-1">
        <code class="truncate">{{ publicBase64 }}</code>
        <button
          @click="
            doCopyTwoSecRedo(publicBase64, () => (showB64Copy = !showB64Copy))
          "
          class="ml-2"
        >
          <fa icon="copy" class="text-slate-400 fa-fw"></fa>
        </button>
        <span v-show="showB64Copy">Copied!</span>
      </div>

      <div class="text-slate-500 text-sm font-bold">Public Key (hex)</div>
      <div class="text-sm text-slate-500 flex justify-start items-center mb-1">
        <code class="truncate">{{ publicHex }}</code>
        <button
          @click="
            doCopyTwoSecRedo(publicHex, () => (showPubCopy = !showPubCopy))
          "
          class="ml-2"
        >
          <fa icon="copy" class="text-slate-400 fa-fw"></fa>
        </button>
        <span v-show="showPubCopy">Copied!</span>
      </div>

      <div class="text-slate-500 text-sm font-bold">Derivation Path</div>
      <div class="text-sm text-slate-500 flex justify-start items-center mb-1">
        <code class="truncate">{{ derivationPath }}</code>
        <button
          @click="
            doCopyTwoSecRedo(derivationPath, () => (showDerCopy = !showDerCopy))
          "
          class="ml-2"
        >
          <fa icon="copy" class="text-slate-400 fa-fw"></fa>
        </button>
        <span v-show="showDerCopy">Copied!</span>
      </div>
    </div>

    <router-link
      :to="{ name: 'new-edit-account' }"
      class="block text-center text-lg font-bold uppercase bg-blue-600 text-white px-2 py-3 rounded-md mb-8"
    >
      Edit Identity
    </router-link>

    <h3 class="text-sm uppercase font-semibold mb-3">Data</h3>

    <router-link
      :to="{ name: 'seed-backup' }"
      href=""
      class="block w-full text-center text-md uppercase bg-slate-500 text-white px-1.5 py-2 rounded-md mb-2"
    >
      Backup Identifier Seed
    </router-link>
    <a
      class="block w-full text-center text-md uppercase bg-slate-500 text-white px-1.5 py-2 rounded-md mb-6"
      @click="exportDatabase()"
    >
      Download Settings & Contacts (excluding Identifier Data)
    </a>
    <a ref="downloadLink" />

    <!-- QR code popup -->
    <dialog id="dlgQR" class="backdrop:bg-black/75 rounded-md">
      <form method="dialog">
        <div class="text-slate-500 text-center">
          <b>ID:</b> <code>did:peer:kl45kj41lk451kl3</code>
        </div>
        <img src="/img/sample-qr-code.png" class="w-full mb-3" />

        <button
          value="cancel"
          class="block w-full text-center text-md uppercase bg-slate-500 text-white px-1.5 py-2 rounded-md mb-2"
        >
          Copy to Clipboard
        </button>
        <button
          value="cancel"
          class="block w-full text-center text-md uppercase bg-slate-500 text-white px-1.5 py-2 rounded-md"
        >
          Close
        </button>
      </form>
    </dialog>

    <h3
      class="text-sm uppercase font-semibold mb-3"
      @click="showAdvanced = !showAdvanced"
    >
      Advanced
    </h3>
    <div v-if="showAdvanced">
      <label
        for="toggleShowAmounts"
        class="flex items-center cursor-pointer mb-6"
        @click="handleChange"
      >
        <!-- toggle -->
        <div class="relative">
          <!-- input -->
          <input
            type="checkbox"
            v-model="showContactGives"
            name="showContactGives"
            class="sr-only"
          />
          <!-- line -->
          <div class="block bg-slate-500 w-14 h-8 rounded-full"></div>
          <!-- dot -->
          <div
            class="dot absolute left-1 top-1 bg-slate-400 w-6 h-6 rounded-full transition"
          ></div>
        </div>
        <!-- label -->
        <div class="ml-2">Show amounts given with contacts</div>
      </label>

      <div class="flex py-2">
        <button
          class="text-center text-md text-blue-500"
          @click="checkLimits()"
        >
          Check Limits
        </button>
        <!-- show spinner if loading limits -->
        <div v-if="loadingLimits" class="ml-2">
          Checking... <fa icon="spinner" class="fa-spin"></fa>
        </div>
        <div class="ml-2">
          {{ limitsMessage }}
        </div>
        <div v-if="!!limits?.nextWeekBeginDateTime" class="px-9">
          <span class="font-bold">Rate Limits</span>
          <p>
            You have done {{ limits.doneClaimsThisWeek }} claims out of
            {{ limits.maxClaimsPerWeek }} for this week. Your claims counter
            resets at {{ readableTime(limits.nextWeekBeginDateTime) }}
          </p>
          <p>
            You have done {{ limits.doneRegistrationsThisMonth }} registrations
            out of {{ limits.maxRegistrationsPerMonth }} for this month. Your
            registrations counter resets at
            {{ readableTime(limits.nextMonthBeginDateTime) }}
          </p>
        </div>
      </div>

      <div class="flex py-2">
        Claim Server
        <input
          type="text"
          class="block w-full rounded border border-slate-400 px-3 py-2"
          v-model="apiServerInput"
        />
        <button
          v-if="apiServerInput != apiServer"
          class="px-4 rounded bg-red-500 border border-slate-400"
          @click="onClickSaveApiServer()"
        >
          <fa icon="floppy-disk" class="fa-fw" color="white"></fa>
        </button>
        <button
          class="px-4 rounded bg-slate-200 border border-slate-400"
          @click="setApiServerInput(Constants.PROD_ENDORSER_API_SERVER)"
        >
          Use Prod
        </button>
        <button
          class="px-4 rounded bg-slate-200 border border-slate-400"
          @click="setApiServerInput(Constants.TEST_ENDORSER_API_SERVER)"
        >
          Use Test
        </button>
        <button
          class="px-4 rounded bg-slate-200 border border-slate-400"
          @click="setApiServerInput(Constants.LOCAL_ENDORSER_API_SERVER)"
        >
          Use Local
        </button>
      </div>

      <div v-if="numAccounts > 0" class="flex py-2">
        Switch Identifier
        <span>
          <button class="text-blue-500 px-2" @click="switchAccount(0)">
            None
          </button>
        </span>
        <span v-for="accountNum in numAccounts" :key="accountNum">
          <button class="text-blue-500 px-2" @click="switchAccount(accountNum)">
            #{{ accountNum }}
          </button>
        </span>
      </div>

      <div>
        <button class="text-blue-500">
          <router-link
            :to="{ name: 'statistics' }"
            class="block text-center py-3"
          >
            See Achievements & Statistics
          </router-link>
        </button>
      </div>
    </div>
    <AlertMessage
      :alertTitle="alertTitle"
      :alertMessage="alertMessage"
    ></AlertMessage>
  </section>
</template>

<script lang="ts">
import "dexie-export-import";
import { Component, Vue } from "vue-facing-decorator";
import { useClipboard } from "@vueuse/core";

import { AppString } from "@/constants/app";
import { db, accountsDB } from "@/db";
import { AccountsSchema } from "@/db/tables/accounts";
import { MASTER_SETTINGS_KEY } from "@/db/tables/settings";
import { accessToken } from "@/libs/crypto";
import { AxiosError } from "axios/index";
import AlertMessage from "@/components/AlertMessage";
import QuickNav from "@/components/QuickNav";

// eslint-disable-next-line @typescript-eslint/no-var-requires
const Buffer = require("buffer/").Buffer;

interface RateLimits {
  doneClaimsThisWeek: string;
  doneRegistrationsThisMonth: string;
  maxClaimsPerWeek: string;
  maxRegistrationsPerMonth: string;
  nextMonthBeginDateTime: string;
  nextWeekBeginDateTime: string;
}

interface ErrorResponse {
  error?: {
    message?: string;
  };
}

@Component({ components: { AlertMessage, QuickNav } })
export default class AccountViewView extends Vue {
  Constants = AppString;

  activeDid = "";
  apiServer = "";
  apiServerInput = "";
  derivationPath = "";
  firstName = "";
  lastName = "";
  numAccounts = 0;
  publicHex = "";
  publicBase64 = "";
  limits: RateLimits | null = null;
  limitsMessage = "";
  loadingLimits = true; // might as well now that we do it on mount, to avoid flashing the registration message
  showContactGives = false;
  private accounts: AccountsSchema;

  showDidCopy = false;
  showDerCopy = false;
  showB64Copy = false;
  showPubCopy = false;

  showAdvanced = false;
  alertMessage = "";
  alertTitle = "";

  public async getIdentity(activeDid) {
    await accountsDB.open();
    const account = await accountsDB.accounts
      .where("did")
      .equals(activeDid)
      .first();
    const identity = JSON.parse(account?.identity || "null");

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

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

  // call fn, copy text to the clipboard, then redo fn after 2 seconds
  doCopyTwoSecRedo(text, fn) {
    fn();
    useClipboard()
      .copy(text)
      .then(() => setTimeout(fn, 2000));
  }

  handleChange() {
    this.showContactGives = !this.showContactGives;
    this.updateShowContactAmounts();
  }

  readableTime(timeStr: string) {
    return timeStr.substring(0, timeStr.indexOf("T"));
  }

  async beforeCreate() {
    accountsDB.open();
    this.accounts = accountsDB.accounts;
    this.numAccounts = await this.accounts.count();
  }

  async created() {
    // Uncomment this to register this user on the test server.
    // To manage within the vue devtools browser extension https://devtools.vuejs.org/
    // assign this to a class variable, eg. "registerThisUser = testServerRegisterUser",
    // select a component in the extension, and enter in the console: $vm.ctx.registerThisUser()
    //testServerRegisterUser();

    try {
      await db.open();
      const settings = await db.settings.get(MASTER_SETTINGS_KEY);
      this.activeDid = settings?.activeDid || "";
      this.apiServer = settings?.apiServer || "";
      this.apiServerInput = settings?.apiServer || "";
      this.firstName = settings?.firstName || "";
      this.lastName = settings?.lastName || "";
      this.showContactGives = !!settings?.showContactGivesInline;

      const identity = await this.getIdentity(this.activeDid);

      this.publicHex = identity.keys[0].publicKeyHex;
      this.publicBase64 = Buffer.from(this.publicHex, "hex").toString("base64");
      this.derivationPath = identity.keys[0].meta.derivationPath;

      db.settings.update(MASTER_SETTINGS_KEY, {
        activeDid: identity.did,
      });
      this.checkLimits();
    } catch (err) {
      if (
        err.message ===
        "Attempted to load account records with no identity available."
      ) {
        this.limitsMessage = "No identity.";
        this.loadingLimits = false;
      } else {
        this.alertMessage =
          "Clear your cache and start over (after data backup).";
        console.error(
          "Telling user to clear cache at page create because:",
          err,
        );
        this.alertTitle = "Error Creating Account";
      }
    }
  }

  public async updateShowContactAmounts() {
    try {
      await db.open();
      db.settings.update(MASTER_SETTINGS_KEY, {
        showContactGivesInline: this.showContactGives,
      });
    } catch (err) {
      this.alertMessage =
        "Clear your cache and start over (after data backup).";
      console.error(
        "Telling user to clear cache after contact setting update because:",
        err,
      );
      this.alertTitle = "Error Updating Contact Setting";
    }
  }

  public async exportDatabase() {
    try {
      const blob = await db.export({ prettyJson: true });
      const url = URL.createObjectURL(blob);

      const downloadAnchor = this.$refs.downloadLink as HTMLAnchorElement;
      downloadAnchor.href = url;
      downloadAnchor.download = db.name + "-backup.json";
      downloadAnchor.click();

      URL.revokeObjectURL(url);

      this.alertTitle = "Download Started";
      this.alertMessage = "See your downloads directory for the backup.";
    } catch (error) {
      this.alertTitle = "Export Error";
      this.alertMessage = "See console logs for more info.";
      console.error("Export Error:", error);
    }
  }

  async checkLimits() {
    this.loadingLimits = true;
    this.limitsMessage = "";

    try {
      const url = this.apiServer + "/api/report/rateLimits";
      const identity = await this.getIdentity(this.activeDid);
      const headers = await this.getHeaders(identity);

      const resp = await this.axios.get(url, { headers });
      // axios throws an exception on a 400
      if (resp.status === 200) {
        this.limits = resp.data;
      }
    } catch (error: unknown) {
      if (
        error.message ===
        "Attempted to load Give records with no identity available."
      ) {
        this.limitsMessage = "No identity.";
        this.loadingLimits = false;
      } else {
        const serverError = error as AxiosError;
        console.error("Bad response retrieving limits: ", serverError);

        const data: ErrorResponse | undefined =
          serverError.response && serverError.response.data;
        if (data && data.error && data.error.message) {
          this.limitsMessage = data.error.message;
        } else {
          this.limitsMessage = "Bad server response.";
        }
      }
    }

    this.loadingLimits = false;
  }

  async switchAccount(accountNum: number) {
    // 0 means none
    if (accountNum === 0) {
      await db.open();
      db.settings.update(MASTER_SETTINGS_KEY, {
        activeDid: undefined,
      });
      this.activeDid = "";
      this.derivationPath = "";
      this.publicHex = "";
      this.publicBase64 = "";
    } else {
      await accountsDB.open();
      const accounts = await accountsDB.accounts.toArray();
      const account = accounts[accountNum - 1];

      await db.open();
      db.settings.update(MASTER_SETTINGS_KEY, {
        activeDid: account.did,
      });

      this.activeDid = account.did;
      this.derivationPath = account.derivationPath;
      this.publicHex = account.publicKeyHex;
      this.publicBase64 = Buffer.from(this.publicHex, "hex").toString("base64");
    }
  }

  public showContactGivesClassNames() {
    return {
      "bg-slate-900": !this.showContactGives,
      "bg-green-600": this.showContactGives,
    };
  }

  async onClickSaveApiServer() {
    await db.open();
    db.settings.update(MASTER_SETTINGS_KEY, {
      apiServer: this.apiServerInput,
    });
    this.apiServer = this.apiServerInput;
  }

  setApiServerInput(value) {
    this.apiServerInput = value;
  }
}
</script>
