<template>
  <div v-if="visible" class="dialog-overlay">
    <div class="dialog">
      <h1 class="text-xl font-bold text-center mb-4">
        {{ message }} {{ giver?.name || "somebody not named" }}
      </h1>
      <input
        type="text"
        class="block w-full rounded border border-slate-400 mb-2 px-3 py-2"
        placeholder="What was received"
        v-model="description"
      />
      <div class="flex flex-row">
        <span
          class="rounded-l border border-r-0 border-slate-400 bg-slate-200 w-1/3 text-center text-blue-500 px-2 py-2"
          @click="changeUnitCode()"
        >
          {{ libsUtil.UNIT_SHORT[unitCode] }}
        </span>
        <div
          class="border border-r-0 border-slate-400 bg-slate-200 px-4 py-2"
          @click="decrement()"
          v-if="amountInput !== '0'"
        >
          <fa icon="chevron-left" />
        </div>
        <input
          type="number"
          class="w-full border border-r-0 border-slate-400 px-2 py-2 text-center"
          v-model="amountInput"
        />
        <div
          class="rounded-r border border-slate-400 bg-slate-200 px-4 py-2"
          @click="increment()"
        >
          <fa icon="chevron-right" />
        </div>
      </div>
      <div class="mt-2 text-right">
        <span v-if="showGivenToUser" class="mr-16">
          <input type="checkbox" class="mr-2" v-model="givenToUser" />
          <label class="text-sm">Given to you</label>
        </span>
        <span>
          <input type="checkbox" class="mr-2" v-model="isTrade" />
          <label class="text-sm">Trade (not a gift)</label>
        </span>
      </div>
      <p class="text-center mb-2 mt-6 italic">
        Sign & Send to publish to the world
      </p>
      <button
        class="block w-full text-center text-lg font-bold uppercase bg-blue-600 text-white px-2 py-3 rounded-md mb-2"
        @click="confirm"
      >
        Sign &amp; Send
      </button>
      <button
        class="block w-full text-center text-md uppercase bg-slate-500 text-white px-1.5 py-2 rounded-md"
        @click="cancel"
      >
        Cancel
      </button>
    </div>
  </div>
</template>

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

import { NotificationIface } from "@/constants/app";
import {
  createAndSubmitGive,
  didInfo,
  GiverInputInfo,
} from "@/libs/endorserServer";
import * as libsUtil from "@/libs/util";
import { accountsDB, db } from "@/db/index";
import { MASTER_SETTINGS_KEY, Settings } from "@/db/tables/settings";
import { Account } from "@/db/tables/accounts";
import { Contact } from "@/db/tables/contacts";

@Component
export default class GiftedDialog extends Vue {
  $notify!: (notification: NotificationIface, timeout?: number) => void;

  @Prop message = "";
  @Prop projectId = "";
  @Prop showGivenToUser = false;

  activeDid = "";
  allContacts: Array<Contact> = [];
  allMyDids: Array<string> = [];
  apiServer = "";

  amountInput = "0";
  giver?: GiverInputInfo; // undefined means no identified giver agent
  description = "";
  givenToUser = false;
  isTrade = false;
  offerId = "";
  unitCode = "HUR";
  visible = false;

  libsUtil = libsUtil;

  async open(giver?: GiverInputInfo, offerId?: string) {
    this.description = "";
    this.giver = giver || {};
    // if we show "given to user" selection, default checkbox to true
    this.givenToUser = this.showGivenToUser;
    this.amountInput = "0";
    this.offerId = offerId || "";

    try {
      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();

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

      if (!this.giver.name) {
        this.giver.name = didInfo(
          this.giver.did,
          this.activeDid,
          this.allMyDids,
          this.allContacts,
        );
      }
      // eslint-disable-next-line @typescript-eslint/no-explicit-any
    } catch (err: any) {
      console.error("Error retrieving settings from database:", err);
      this.$notify(
        {
          group: "alert",
          type: "danger",
          title: "Error",
          text: err.message || "There was an error retrieving your settings.",
        },
        -1,
      );
    }

    this.visible = true;
  }

  close() {
    // close the dialog but don't change values (since it might be submitting info)
    this.visible = false;
  }

  changeUnitCode() {
    const units = Object.keys(this.libsUtil.UNIT_SHORT);
    const index = units.indexOf(this.unitCode);
    this.unitCode = units[(index + 1) % units.length];
  }

  increment() {
    this.amountInput = `${(parseFloat(this.amountInput) || 0) + 1}`;
  }

  decrement() {
    this.amountInput = `${Math.max(
      0,
      (parseFloat(this.amountInput) || 1) - 1,
    )}`;
  }

  cancel() {
    this.close();
    this.eraseValues();
  }

  eraseValues() {
    this.description = "";
    this.giver = undefined;
    this.givenToUser = this.showGivenToUser;
    this.amountInput = "0";
    this.unitCode = "HUR";
  }

  async confirm() {
    this.close();
    this.$notify(
      {
        group: "alert",
        type: "toast",
        text: "Recording the give...",
        title: "",
      },
      1000,
    );
    // this is asynchronous, but we don't need to wait for it to complete
    await this.recordGive(
      (this.giver?.did as string) || null,
      this.description,
      parseFloat(this.amountInput),
      this.unitCode,
    ).then(() => {
      this.eraseValues();
    });
  }

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

    if (!identity) {
      throw new Error(
        "Attempted to load Give records for DID ${activeDid} but no identifier was found",
      );
    }
    return identity;
  }

  /**
   *
   * @param giverDid may be null
   * @param description may be an empty string
   * @param amountInput may be 0
   * @param unitCode may be omitted, defaults to "HUR"
   */
  public async recordGive(
    giverDid: string | null,
    description: string,
    amountInput: number,
    unitCode: string = "HUR",
  ) {
    if (!this.activeDid) {
      this.$notify(
        {
          group: "alert",
          type: "danger",
          title: "Error",
          text: "You must select an identifier before you can record a give.",
        },
        -1,
      );
      return;
    }

    if (!description && !amountInput) {
      this.$notify(
        {
          group: "alert",
          type: "danger",
          title: "Error",
          text: `You must enter a description or some number of ${this.libsUtil.UNIT_LONG[unitCode]}.`,
        },
        -1,
      );
      return;
    }

    try {
      const identity = await this.getIdentity(this.activeDid);
      const result = await createAndSubmitGive(
        this.axios,
        this.apiServer,
        identity,
        giverDid,
        this.givenToUser ? this.activeDid : undefined,
        description,
        amountInput,
        unitCode,
        this.projectId,
        this.offerId,
        this.isTrade,
      );

      if (
        result.type === "error" ||
        this.isGiveCreationError(result.response)
      ) {
        const errorMessage = this.getGiveCreationErrorMessage(result);
        console.error("Error with give creation result:", result);
        this.$notify(
          {
            group: "alert",
            type: "danger",
            title: "Error",
            text: errorMessage || "There was an error creating the give.",
          },
          -1,
        );
      } else {
        this.$notify(
          {
            group: "alert",
            type: "success",
            title: "Success",
            text: `That ${this.isTrade ? "trade" : "gift"} was recorded.`,
          },
          7000,
        );
      }
      // eslint-disable-next-line @typescript-eslint/no-explicit-any
    } catch (error: any) {
      console.error("Error with give recordation caught:", error);
      const message =
        error.userMessage ||
        error.response?.data?.error?.message ||
        "There was an error recording the give.";
      this.$notify(
        {
          group: "alert",
          type: "danger",
          title: "Error",
          text: message,
        },
        -1,
      );
    }
  }

  // Helper functions for readability

  /**
   * @param result response "data" from the server
   * @returns true if the result indicates an error
   */
  // eslint-disable-next-line @typescript-eslint/no-explicit-any
  isGiveCreationError(result: any) {
    return result.status !== 201 || result.data?.error;
  }

  /**
   * @param result direct response eg. ErrorResult or SuccessResult (potentially with embedded "data")
   * @returns best guess at an error message
   */
  // eslint-disable-next-line @typescript-eslint/no-explicit-any
  getGiveCreationErrorMessage(result: any) {
    return (
      result.error?.userMessage ||
      result.error?.error ||
      result.response?.data?.error?.message
    );
  }
}
</script>

<style>
.dialog-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 1.5rem;
}

.dialog {
  background-color: white;
  padding: 1rem;
  border-radius: 0.5rem;
  width: 100%;
  max-width: 500px;
}
</style>
