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

  <!-- CONTENT -->
  <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">
      Discover Projects
    </h1>

    <!-- Quick Search -->
    <div id="QuickSearch" class="mb-4 flex" v-on:keyup.enter="searchSelected()">
      <input
        type="text"
        v-model="searchTerms"
        placeholder="Search…"
        class="block w-full rounded-l border border-r-0 border-slate-400 px-3 py-2"
      />
      <button
        @click="searchSelected()"
        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>

    <!-- 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="
              projects = [];
              isLocalActive = true;
              isRemoteActive = false;
              searchLocal();
            "
            v-bind:class="computedLocalTabClassNames()"
          >
            Nearby
            <span
              class="font-semibold text-sm bg-slate-200 px-1.5 py-0.5 rounded-md"
              v-if="isLocalActive"
            >
              {{ localCount > -1 ? localCount : "?" }}
            </span>
          </a>
        </li>
        <li>
          <a
            href="#"
            @click="
              projects = [];
              isRemoteActive = true;
              isLocalActive = false;
              searchAll();
            "
            v-bind:class="computedRemoteTabClassNames()"
          >
            Anywhere
            <span
              class="font-semibold text-sm bg-slate-200 px-1.5 py-0.5 rounded-md"
              v-if="isRemoteActive"
            >
              {{ remoteCount > -1 ? remoteCount : "?" }}
            </span>
          </a>
        </li>
      </ul>
    </div>

    <div v-if="isLocalActive">
      <div>
        <button
          class="ml-2 mt-2 px-4 py-2 rounded-md bg-blue-200 text-blue-500"
          @click="$router.push({ name: 'search-area' })"
        >
          Select a {{ searchBox ? "Different" : "" }} Location for Nearby Search
        </button>
      </div>
    </div>

    <!-- 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>

    <!-- Results List -->
    <InfiniteScroll @reached-bottom="loadMoreData">
      <ul>
        <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 cursor-pointer"
          >
            <div>
              <ProjectIcon
                :entityId="project.handleId"
                :iconSize="48"
                :imageUrl="project.image"
                class="block border border-slate-300 rounded-md max-h-12 max-w-12"
              />
            </div>

            <div class="grow">
              <h2 class="text-base font-semibold">{{ project.name }}</h2>
              <div class="text-sm">
                <fa icon="user" class="fa-fw text-slate-400"></fa>
                {{
                  didInfo(project.issuerDid, activeDid, allMyDids, allContacts)
                }}
              </div>
            </div>
          </a>
        </li>
      </ul>
    </InfiniteScroll>
  </section>
</template>

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

import QuickNav from "@/components/QuickNav.vue";
import InfiniteScroll from "@/components/InfiniteScroll.vue";
import ProjectIcon from "@/components/ProjectIcon.vue";
import TopMessage from "@/components/TopMessage.vue";
import { NotificationIface } from "@/constants/app";
import { accountsDB, db } from "@/db/index";
import { Contact } from "@/db/tables/contacts";
import { BoundingBox, MASTER_SETTINGS_KEY } from "@/db/tables/settings";
import { accessToken } from "@/libs/crypto";
import { didInfo, PlanData } from "@/libs/endorserServer";

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

  activeDid = "";
  allContacts: Array<Contact> = [];
  allMyDids: Array<string> = [];
  apiServer = "";
  searchTerms = "";
  projects: PlanData[] = [];
  isLoading = false;
  isLocalActive = true;
  isRemoteActive = false;
  localCount = -1;
  remoteCount = -1;
  searchBox: { name: string; bbox: BoundingBox } | null = null;

  // make this function available to the Vue template
  didInfo = didInfo;

  async mounted() {
    await db.open();
    const settings = await db.settings.get(MASTER_SETTINGS_KEY);
    this.activeDid = (settings?.activeDid as string) || "";
    this.apiServer = (settings?.apiServer as string) || "";
    this.searchBox = settings?.searchBoxes?.[0] || null;

    this.allContacts = await db.contacts.toArray();

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

    if (this.searchBox) {
      await this.searchLocal();
    } else {
      this.isLocalActive = false;
      this.isRemoteActive = true;
      await this.searchAll();
    }
  }

  public resetCounts() {
    this.localCount = -1;
    this.remoteCount = -1;
  }

  public async searchSelected() {
    if (this.isLocalActive) {
      await this.searchLocal();
    } else {
      await this.searchAll();
    }
  }

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

    if (this.activeDid) {
      await accountsDB.open();
      const allAccounts = await accountsDB.accounts.toArray();
      const account = allAccounts.find((acc) => acc.did === this.activeDid);
      const identity = JSON.parse(account?.identity || "null");

      if (!identity) {
        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.",
        );
      }

      headers["Authorization"] = "Bearer " + (await accessToken(identity));
    } else {
      // it's OK without auth... we just won't get any identifiers
    }
    return headers;
  }

  public async searchAll(beforeId?: string) {
    this.resetCounts();

    if (!beforeId) {
      // this was an initial search so clear any previous results
      this.projects = [];
    }

    let queryParams = "claimContents=" + encodeURIComponent(this.searchTerms);

    if (beforeId) {
      queryParams = queryParams + `&beforeId=${beforeId}`;
    }

    try {
      this.isLoading = true;
      const response = await fetch(
        this.apiServer + "/api/v2/report/plans?" + queryParams,
        {
          method: "GET",
          headers: await this.buildHeaders(),
        },
      );

      if (response.status !== 200) {
        const details = await response.text();
        console.error("Problem with full search:", details);
        this.$notify(
          {
            group: "alert",
            type: "danger",
            title: "Error",
            text: `There was a problem accessing the server. Try again later.`,
          },
          -1,
        );

        throw details;
      }

      const results = await response.json();

      const plans: PlanData[] = results.data;
      if (plans) {
        for (const plan of plans) {
          const { name, description, handleId, image, issuerDid, rowid } = plan;
          this.projects.push({
            name,
            description,
            handleId,
            image,
            issuerDid,
            rowid,
          });
        }
        this.remoteCount = this.projects.length;
      } else {
        throw JSON.stringify(results);
      }
      // eslint-disable-next-line @typescript-eslint/no-explicit-any
    } catch (e: any) {
      console.error("Error with feed load:", e);
      this.$notify(
        {
          group: "alert",
          type: "danger",
          title: "Error",
          text: e.userMessage || "There was a problem retrieving projects.",
        },
        -1,
      );
    } finally {
      this.isLoading = false;
    }
  }

  public async searchLocal(beforeId?: string) {
    this.resetCounts();

    if (!this.searchBox) {
      this.projects = [];
      return;
    }

    if (!beforeId) {
      // this was an initial search so clear any previous results
      this.projects = [];
    }

    const claimContents =
      "claimContents=" + encodeURIComponent(this.searchTerms);

    let queryParams = [
      claimContents,
      "minLocLat=" + this.searchBox.bbox.minLat,
      "maxLocLat=" + this.searchBox.bbox.maxLat,
      "westLocLon=" + this.searchBox.bbox.westLong,
      "eastLocLon=" + this.searchBox.bbox.eastLong,
    ].join("&");

    if (beforeId) {
      queryParams = queryParams + `&beforeId=${beforeId}`;
    }

    try {
      this.isLoading = true;
      const response = await fetch(
        this.apiServer + "/api/v2/report/plansByLocation?" + queryParams,
        {
          method: "GET",
          headers: await this.buildHeaders(),
        },
      );

      if (response.status !== 200) {
        const details = await response.text();
        console.error("Problem with nearby search:", details);
        this.$notify(
          {
            group: "alert",
            type: "danger",
            title: "Error",
            text: "There was a problem accessing the server. Try again later.",
          },
          -1,
        );
        throw await response.text();
      }

      const results = await response.json();

      if (results.data) {
        if (beforeId) {
          const plans: PlanData[] = results.data;
          for (const plan of plans) {
            const { name, description, handleId, issuerDid, rowid } = plan;
            this.projects.push({
              name,
              description,
              handleId,
              issuerDid,
              rowid,
            });
          }
        } else {
          this.projects = results.data;
        }
        this.localCount = this.projects.length;
      } else {
        throw JSON.stringify(results);
      }
      // eslint-disable-next-line @typescript-eslint/no-explicit-any
    } catch (e: any) {
      console.error("Error with feed load:", e);
      this.$notify(
        {
          group: "alert",
          type: "danger",
          title: "Error",
          text: e.userMessage || "There was a problem retrieving 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 loadMoreData(payload: boolean) {
    if (this.projects.length > 0 && payload) {
      const latestProject = this.projects[this.projects.length - 1];
      if (this.isLocalActive) {
        this.searchLocal(latestProject["rowid"]);
      } else if (this.isRemoteActive) {
        this.searchAll(latestProject["rowid"]);
      }
    }
  }

  /**
   * 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);
  }

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

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

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

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

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

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