import { it, describe, expect } from "bun:test";
import fs from "fs";

function gc() {
  // console.trace();
  Bun.gc(true);
}

describe("fetch", () => {
  const urls = ["https://example.com", "http://example.com"];
  for (let url of urls) {
    gc();
    it(url, async () => {
      gc();
      const response = await fetch(url);
      gc();
      const text = await response.text();
      gc();
      expect(
        fs.readFileSync(
          import.meta.path.substring(0, import.meta.path.lastIndexOf("/")) +
            "/fetch.js.txt",
          "utf8"
        )
      ).toBe(text);
    });
  }
});

function testBlobInterface(blobbyConstructor, hasBlobFn) {
  for (let withGC of [false, true]) {
    for (let jsonObject of [
      { hello: true },
      {
        hello:
          "😀 😃 😄 😁 😆 😅 😂 🤣 🥲 ☺️ 😊 😇 🙂 🙃 😉 😌 😍 🥰 😘 😗 😙 😚 😋 😛 😝 😜 🤪 🤨 🧐 🤓 😎 🥸 🤩 🥳",
      },
    ]) {
      it(`${jsonObject.hello === true ? "latin1" : "utf16"} json${
        withGC ? " (with gc) " : ""
      }`, async () => {
        if (withGC) gc();
        var response = blobbyConstructor(JSON.stringify(jsonObject));
        if (withGC) gc();
        expect(JSON.stringify(await response.json())).toBe(
          JSON.stringify(jsonObject)
        );
        if (withGC) gc();
      });

      it(`${
        jsonObject.hello === true ? "latin1" : "utf16"
      } arrayBuffer -> json${withGC ? " (with gc) " : ""}`, async () => {
        if (withGC) gc();
        var response = blobbyConstructor(
          new TextEncoder().encode(JSON.stringify(jsonObject))
        );
        if (withGC) gc();
        expect(JSON.stringify(await response.json())).toBe(
          JSON.stringify(jsonObject)
        );
        if (withGC) gc();
      });

      it(`${jsonObject.hello === true ? "latin1" : "utf16"} text${
        withGC ? " (with gc) " : ""
      }`, async () => {
        if (withGC) gc();
        var response = blobbyConstructor(JSON.stringify(jsonObject));
        if (withGC) gc();
        expect(await response.text()).toBe(JSON.stringify(jsonObject));
        if (withGC) gc();
      });

      it(`${
        jsonObject.hello === true ? "latin1" : "utf16"
      } arrayBuffer -> text${withGC ? " (with gc) " : ""}`, async () => {
        if (withGC) gc();
        var response = blobbyConstructor(
          new TextEncoder().encode(JSON.stringify(jsonObject))
        );
        if (withGC) gc();
        expect(await response.text()).toBe(JSON.stringify(jsonObject));
        if (withGC) gc();
      });

      it(`${jsonObject.hello === true ? "latin1" : "utf16"} arrayBuffer${
        withGC ? " (with gc) " : ""
      }`, async () => {
        if (withGC) gc();

        var response = blobbyConstructor(JSON.stringify(jsonObject));
        if (withGC) gc();

        const bytes = new TextEncoder().encode(JSON.stringify(jsonObject));
        if (withGC) gc();

        const compare = new Uint8Array(await response.arrayBuffer());
        if (withGC) gc();

        for (let i = 0; i < compare.length; i++) {
          if (withGC) gc();

          expect(compare[i]).toBe(bytes[i]);
          if (withGC) gc();
        }
        if (withGC) gc();
      });

      it(`${
        jsonObject.hello === true ? "latin1" : "utf16"
      } arrayBuffer -> arrayBuffer${withGC ? " (with gc) " : ""}`, async () => {
        if (withGC) gc();

        var response = blobbyConstructor(
          new TextEncoder().encode(JSON.stringify(jsonObject))
        );
        if (withGC) gc();

        const bytes = new TextEncoder().encode(JSON.stringify(jsonObject));
        if (withGC) gc();

        const compare = new Uint8Array(await response.arrayBuffer());
        if (withGC) gc();

        for (let i = 0; i < compare.length; i++) {
          if (withGC) gc();

          expect(compare[i]).toBe(bytes[i]);
          if (withGC) gc();
        }
        if (withGC) gc();
      });

      hasBlobFn &&
        it(`${jsonObject.hello === true ? "latin1" : "utf16"} blob${
          withGC ? " (with gc) " : ""
        }`, async () => {
          if (withGC) gc();
          const text = JSON.stringify(jsonObject);
          var response = blobbyConstructor(text);
          if (withGC) gc();
          const size = new TextEncoder().encode(text).byteLength;
          if (withGC) gc();
          const blobed = await response.blob();
          if (withGC) gc();
          expect(blobed instanceof Blob).toBe(true);
          if (withGC) gc();
          expect(blobed.size).toBe(size);
          if (withGC) gc();
          expect(blobed.type).toBe("");
          if (withGC) gc();
          blobed.type = "application/json";
          if (withGC) gc();
          expect(blobed.type).toBe("application/json");
          if (withGC) gc();
          const out = await blobed.text();
          expect(out).toBe(text);
          if (withGC) gc();
          await new Promise((resolve) => setTimeout(resolve, 1));
          if (withGC) gc();
          expect(out).toBe(text);
          const first = await blobed.arrayBuffer();
          const initial = first[0];
          first[0] = 254;
          const second = await blobed.arrayBuffer();
          expect(second[0]).toBe(initial);
          expect(first[0]).toBe(254);
        });
    }
  }
}

describe("Blob", () => {
  testBlobInterface((data) => new Blob([data]));

  var blobConstructorValues = [
    ["123", "456"],
    ["123", 456],
    ["123", "456", "789"],
    ["123", 456, 789],
    [1, 2, 3, 4, 5, 6, 7, 8, 9],
    [Uint8Array.from([1, 2, 3, 4, 5, 6, 7, 9])],
    [Uint8Array.from([1, 2, 3, 4]), "5678", 9],
    [new Blob([Uint8Array.from([1, 2, 3, 4])]), "5678", 9],
    [
      new Blob([
        new TextEncoder().encode(
          "😀 😃 😄 😁 😆 😅 😂 🤣 🥲 ☺️ 😊 😇 🙂 🙃 😉 😌 😍 🥰 😘 😗 😙 😚 😋 😛 😝 😜 🤪 🤨 🧐 🤓 😎 🥸 🤩 🥳"
        ),
      ]),
    ],
    [
      new TextEncoder().encode(
        "😀 😃 😄 😁 😆 😅 😂 🤣 🥲 ☺️ 😊 😇 🙂 🙃 😉 😌 😍 🥰 😘 😗 😙 😚 😋 😛 😝 😜 🤪 🤨 🧐 🤓 😎 🥸 🤩 🥳"
      ),
    ],
  ];

  var expected = [
    "123456",
    "123456",
    "123456789",
    "123456789",
    "123456789",
    "\x01\x02\x03\x04\x05\x06\x07\t",
    "\x01\x02\x03\x0456789",
    "\x01\x02\x03\x0456789",
    "😀 😃 😄 😁 😆 😅 😂 🤣 🥲 ☺️ 😊 😇 🙂 🙃 😉 😌 😍 🥰 😘 😗 😙 😚 😋 😛 😝 😜 🤪 🤨 🧐 🤓 😎 🥸 🤩 🥳",
    "😀 😃 😄 😁 😆 😅 😂 🤣 🥲 ☺️ 😊 😇 🙂 🙃 😉 😌 😍 🥰 😘 😗 😙 😚 😋 😛 😝 😜 🤪 🤨 🧐 🤓 😎 🥸 🤩 🥳",
  ];

  it(`blobConstructorValues`, async () => {
    for (let i = 0; i < blobConstructorValues.length; i++) {
      var response = new Blob(blobConstructorValues[i]);
      const res = await response.text();
      if (res !== expected[i]) {
        throw new Error(
          `Failed: ${expected[i]
            .split("")
            .map((a) => a.charCodeAt(0))}, received: ${res
            .split("")
            .map((a) => a.charCodeAt(0))}`
        );
      }

      expect(res).toBe(expected[i]);
    }
  });

  for (let withGC of [false, true]) {
    it(`Blob.slice() ${withGC ? " with gc" : ""}`, async () => {
      var parts = ["hello", " ", "world"];
      if (withGC) gc();
      var str = parts.join("");
      if (withGC) gc();
      var combined = new Blob(parts);
      if (withGC) gc();
      for (let part of parts) {
        if (withGC) gc();
        expect(
          await combined
            .slice(str.indexOf(part), str.indexOf(part) + part.length)
            .text()
        ).toBe(part);
        if (withGC) gc();
      }
      if (withGC) gc();
      for (let part of parts) {
        if (withGC) gc();
        expect(
          await combined
            .slice(str.indexOf(part), str.indexOf(part) + part.length)
            .text()
        ).toBe(part);
        if (withGC) gc();
      }
    });
  }
});

describe("Response", () => {
  describe("Response.json", () => {
    it("works", async () => {
      const inputs = [
        "hellooo",
        [[123], 456, 789],
        { hello: "world" },
        { ok: "😉 😌 😍 🥰 😘 " },
      ];
      for (let input of inputs) {
        const output = JSON.stringify(input);
        expect(await Response.json(input).text()).toBe(output);
      }
      // JSON.stringify() returns undefined
      expect(await Response.json().text()).toBe("");
      // JSON.stringify("") returns '""'
      expect(await Response.json("").text()).toBe('""');
    });
    it("sets the content-type header", () => {
      let response = Response.json("hello");
      expect(response.type).toBe("basic");
      expect(response.headers.get("content-type")).toBe(
        "application/json;charset=utf-8"
      );
      expect(response.status).toBe(200);
    });
    it("supports number status code", () => {
      let response = Response.json("hello", 407);
      expect(response.type).toBe("basic");
      expect(response.headers.get("content-type")).toBe(
        "application/json;charset=utf-8"
      );
      expect(response.status).toBe(407);
    });

    it("supports headers", () => {
      var response = Response.json("hello", {
        headers: {
          "content-type": "potato",
          "x-hello": "world",
        },
        status: 408,
      });

      expect(response.headers.get("x-hello")).toBe("world");
      expect(response.status).toBe(408);
    });
  });
  describe("Response.redirect", () => {
    it("works", () => {
      const inputs = [
        "http://example.com",
        "http://example.com/",
        "http://example.com/hello",
        "http://example.com/hello/",
        "http://example.com/hello/world",
        "http://example.com/hello/world/",
      ];
      for (let input of inputs) {
        expect(Response.redirect(input).headers.get("Location")).toBe(input);
      }
    });

    it("supports headers", () => {
      var response = Response.redirect("https://example.com", {
        headers: {
          "content-type": "potato",
          "x-hello": "world",
          Location: "https://wrong.com",
        },
        status: 408,
      });
      expect(response.headers.get("x-hello")).toBe("world");
      expect(response.headers.get("Location")).toBe("https://example.com");
      expect(response.status).toBe(302);
      expect(response.type).toBe("basic");
      expect(response.ok).toBe(false);
    });
  });
  describe("Response.error", () => {
    it("works", () => {
      expect(Response.error().type).toBe("error");
      expect(Response.error().ok).toBe(false);
      expect(Response.error().status).toBe(0);
    });
  });
  it("clone", async () => {
    gc();
    var body = new Response("<div>hello</div>", {
      headers: {
        "content-type": "text/html; charset=utf-8",
      },
    });
    gc();
    var clone = body.clone();
    gc();
    body.headers.set("content-type", "text/plain");
    gc();
    expect(clone.headers.get("content-type")).toBe("text/html; charset=utf-8");
    gc();
    expect(body.headers.get("content-type")).toBe("text/plain");
    gc();
    expect(await clone.text()).toBe("<div>hello</div>");
    gc();
  });
  it("invalid json", async () => {
    gc();
    var body = new Response("<div>hello</div>", {
      headers: {
        "content-type": "text/html; charset=utf-8",
      },
    });
    try {
      await body.json();
      expect(false).toBe(true);
    } catch (exception) {
      expect(exception instanceof SyntaxError);
    }
  });

  testBlobInterface((data) => new Response(data), true);
});

describe("Request", () => {
  it("clone", async () => {
    gc();
    var body = new Request("https://hello.com", {
      headers: {
        "content-type": "text/html; charset=utf-8",
      },
      body: "<div>hello</div>",
    });
    gc();
    expect(body.headers.get("content-type")).toBe("text/html; charset=utf-8");
    gc();
    var clone = body.clone();
    gc();
    body.headers.set("content-type", "text/plain");
    gc();
    expect(clone.headers.get("content-type")).toBe("text/html; charset=utf-8");
    gc();
    expect(body.headers.get("content-type")).toBe("text/plain");
    gc();
    expect(await clone.text()).toBe("<div>hello</div>");
    gc();
  });

  testBlobInterface(
    (data) => new Request("https://hello.com", { body: data }),
    true
  );
});

describe("Headers", () => {
  it("writes", async () => {
    var headers = new Headers({
      "content-type": "text/html; charset=utf-8",
    });
    gc();
    expect(headers.get("content-type")).toBe("text/html; charset=utf-8");
    gc();
    headers.delete("content-type");
    gc();
    expect(headers.get("content-type")).toBe(null);
    gc();
    headers.append("content-type", "text/plain");
    gc();
    expect(headers.get("content-type")).toBe("text/plain");
    gc();
    headers.append("content-type", "text/plain");
    gc();
    expect(headers.get("content-type")).toBe("text/plain, text/plain");
    gc();
    headers.set("content-type", "text/html; charset=utf-8");
    gc();
    expect(headers.get("content-type")).toBe("text/html; charset=utf-8");

    headers.delete("content-type");
    gc();
    expect(headers.get("content-type")).toBe(null);
    gc();
  });
});