import test from "ava";
import MemoryBackend from "./MemoryBackend";
import BridgeIDBFactory from "./BridgeIDBFactory";
import BridgeIDBRequest from "./BridgeIDBRequest";
import BridgeIDBDatabase from "./BridgeIDBDatabase";
import BridgeIDBTransaction from "./BridgeIDBTransaction";
import BridgeIDBKeyRange from "./BridgeIDBKeyRange";
import BridgeIDBCursorWithValue from "./BridgeIDBCursorWithValue";

function promiseFromRequest(request: BridgeIDBRequest): Promise<any> {
  return new Promise((resolve, reject) => {
    request.onsuccess = () => {
      resolve(request.result);
    };
    request.onerror = () => {
      reject(request.error);
    };
  });
}

function promiseFromTransaction(
  transaction: BridgeIDBTransaction,
): Promise<any> {
  return new Promise((resolve, reject) => {
    console.log("attaching event handlers");
    transaction.oncomplete = () => {
      console.log("oncomplete was called from promise");
      resolve();
    };
    transaction.onerror = () => {
      reject();
    };
  });
}

test("Spec: Example 1 Part 1", async t => {
  const backend = new MemoryBackend();
  const idb = new BridgeIDBFactory(backend);

  const request = idb.open("library");
  request.onupgradeneeded = () => {
    const db = request.result;
    const store = db.createObjectStore("books", { keyPath: "isbn" });
    const titleIndex = store.createIndex("by_title", "title", { unique: true });
    const authorIndex = store.createIndex("by_author", "author");

    // Populate with initial data.
    store.put({ title: "Quarry Memories", author: "Fred", isbn: 123456 });
    store.put({ title: "Water Buffaloes", author: "Fred", isbn: 234567 });
    store.put({ title: "Bedrock Nights", author: "Barney", isbn: 345678 });
  };

  await promiseFromRequest(request);
  t.pass();
});

test("Spec: Example 1 Part 2", async t => {
  const backend = new MemoryBackend();
  const idb = new BridgeIDBFactory(backend);

  const request = idb.open("library");
  request.onupgradeneeded = () => {
    const db = request.result;
    const store = db.createObjectStore("books", { keyPath: "isbn" });
    const titleIndex = store.createIndex("by_title", "title", { unique: true });
    const authorIndex = store.createIndex("by_author", "author");
  };

  const db: BridgeIDBDatabase = await promiseFromRequest(request);

  t.is(db.name, "library");

  const tx = db.transaction("books", "readwrite");
  tx.oncomplete = () => {
    console.log("oncomplete called");
  };

  const store = tx.objectStore("books");

  store.put({ title: "Quarry Memories", author: "Fred", isbn: 123456 });
  store.put({ title: "Water Buffaloes", author: "Fred", isbn: 234567 });
  store.put({ title: "Bedrock Nights", author: "Barney", isbn: 345678 });

  await promiseFromTransaction(tx);

  t.pass();
});

test("Spec: Example 1 Part 3", async t => {
  const backend = new MemoryBackend();
  const idb = new BridgeIDBFactory(backend);

  const request = idb.open("library");
  request.onupgradeneeded = () => {
    const db = request.result;
    const store = db.createObjectStore("books", { keyPath: "isbn" });
    const titleIndex = store.createIndex("by_title", "title", { unique: true });
    const authorIndex = store.createIndex("by_author", "author");
  };

  const db: BridgeIDBDatabase = await promiseFromRequest(request);

  t.is(db.name, "library");

  const tx = db.transaction("books", "readwrite");

  const store = tx.objectStore("books");

  store.put({ title: "Bedrock Nights", author: "Barney", isbn: 345678 });
  store.put({ title: "Quarry Memories", author: "Fred", isbn: 123456 });
  store.put({ title: "Water Buffaloes", author: "Fred", isbn: 234567 });

  await promiseFromTransaction(tx);

  const tx2 = db.transaction("books", "readonly");
  const store2 = tx2.objectStore("books");
  var index2 = store2.index("by_title");
  const request2 = index2.get("Bedrock Nights");
  const result2: any = await promiseFromRequest(request2);

  t.is(result2.author, "Barney");

  const tx3 = db.transaction(["books"], "readonly");
  const store3 = tx3.objectStore("books");
  const index3 = store3.index("by_author");
  const request3 = index3.openCursor(BridgeIDBKeyRange.only("Fred"));

  await promiseFromRequest(request3);

  let cursor: BridgeIDBCursorWithValue;
  cursor = request3.result as BridgeIDBCursorWithValue;
  t.is(cursor.value.author, "Fred");
  t.is(cursor.value.isbn, 123456);

  cursor.continue();

  await promiseFromRequest(request3);

  cursor = request3.result as BridgeIDBCursorWithValue;
  t.is(cursor.value.author, "Fred");
  t.is(cursor.value.isbn, 234567);

  await promiseFromTransaction(tx3);

  const tx4 = db.transaction("books", "readonly");
  const store4 = tx4.objectStore("books");
  const request4 = store4.openCursor();

  await promiseFromRequest(request4);

  cursor = request4.result;
  t.is(cursor.value.isbn, 123456);

  cursor.continue();

  await promiseFromRequest(request4);

  cursor = request4.result;
  t.is(cursor.value.isbn, 234567);

  cursor.continue();

  await promiseFromRequest(request4);

  cursor = request4.result;
  t.is(cursor.value.isbn, 345678);

  cursor.continue();
  await promiseFromRequest(request4);

  cursor = request4.result;

  t.is(cursor, null);

  const tx5 = db.transaction("books", "readonly");
  const store5 = tx5.objectStore("books");
  const index5 = store5.index("by_author");

  const request5 = index5.openCursor(null, "next");

  await promiseFromRequest(request5);
  cursor = request5.result;
  t.is(cursor.value.author, "Barney");
  cursor.continue();

  await promiseFromRequest(request5);
  cursor = request5.result;
  t.is(cursor.value.author, "Fred");
  cursor.continue();

  db.close();

  t.pass();
});