import { describe, expect, it, vi } from "vitest";
import type { PluginFetchInit } from "@termix/plugin-sdk/backend";
import {
  parseRecipients,
  sendToChannel,
  validateChannelConfig,
  type OutgoingAlert,
  type SenderDeps,
} from "../../src/backend/senders.js";
import { matchesCategory, severityRank } from "../../src/types.js";
import { parseAllowlist } from "../../src/backend/index.js";
import { cleanLink } from "../../src/backend/hub.js";

const ALERT: OutgoingAlert = {
  title: "Disk full",
  body: "/data at 99%",
  severity: "critical",
  category: "automations.notify",
  source: "automations",
  link: { url: "https://termix.example/hosts/1" },
};

function deps(response = new Response("ok")) {
  const calls: Array<{ url: string; init?: PluginFetchInit }> = [];
  const value: SenderDeps = {
    fetch: async (url, init) => {
      calls.push({ url, init });
      return response;
    },
    privateAllowlist: async () => ["ntfy.lan"],
    smtp: async () => null,
    sendMail: vi.fn(),
  };
  return { deps: value, calls };
}

describe("sendToChannel", () => {
  it("posts ntfy with its priority, tag, click link and token", async () => {
    const { deps: d, calls } = deps();
    await sendToChannel(
      {
        type: "ntfy",
        config: { url: "https://ntfy.sh/", topic: "ops", token: "tk_1" },
      },
      ALERT,
      d,
    );
    expect(calls).toEqual([
      {
        url: "https://ntfy.sh/ops",
        init: expect.objectContaining({
          method: "POST",
          body: "/data at 99%",
          allowPrivateHosts: [],
          headers: {
            Title: "Disk full",
            Priority: "5",
            Tags: "rotating_light",
            Click: "https://termix.example/hosts/1",
            Authorization: "Bearer tk_1",
          },
        }),
      },
    ]);
  });

  it("posts a Discord embed", async () => {
    const { deps: d, calls } = deps();
    await sendToChannel(
      {
        type: "discord",
        config: {
          url: "https://discord.com/api/webhooks/1/abc",
          username: "Termix",
        },
      },
      ALERT,
      d,
    );
    const payload = JSON.parse(calls[0].init!.body!);
    expect(payload).toMatchObject({
      username: "Termix",
      embeds: [
        {
          title: "Disk full",
          description: "/data at 99%",
          color: 15158332,
          url: "https://termix.example/hosts/1",
        },
      ],
    });
  });

  it("puts on the webhook's own method and headers", async () => {
    const { deps: d, calls } = deps();
    await sendToChannel(
      {
        type: "webhook",
        config: {
          url: "https://hooks.example",
          method: "PUT",
          headers: { Authorization: "Bearer x" },
        },
      },
      ALERT,
      d,
    );
    expect(calls[0].init).toMatchObject({
      method: "PUT",
      headers: {
        "Content-Type": "application/json",
        Authorization: "Bearer x",
      },
    });
  });

  it("throws with the status when the receiver refuses", async () => {
    const { deps: d } = deps(
      new Response("slow down", { status: 429, statusText: "Too Many" }),
    );
    await expect(
      sendToChannel(
        { type: "webhook", config: { url: "https://hooks.example" } },
        ALERT,
        d,
      ),
    ).rejects.toThrow("HTTP 429 Too Many: slow down");
  });

  it("never links to anything but http(s)", async () => {
    const { deps: d, calls } = deps();
    await sendToChannel(
      { type: "ntfy", config: { url: "https://ntfy.sh", topic: "t" } },
      { ...ALERT, link: { url: "javascript:alert(1)" } },
      d,
    );
    expect(calls[0].init!.headers).not.toHaveProperty("Click");
  });
});

describe("validateChannelConfig", () => {
  it("accepts a working config of each type", () => {
    expect(
      validateChannelConfig("webhook", { url: "https://a.example" }),
    ).toBeNull();
    expect(
      validateChannelConfig("ntfy", { url: "https://ntfy.sh", topic: "t" }),
    ).toBeNull();
    expect(
      validateChannelConfig("discord", {
        url: "https://discordapp.com/api/webhooks/1/x",
      }),
    ).toBeNull();
    expect(
      validateChannelConfig("email", { to: "a@example.com; b@example.org" }),
    ).toBeNull();
  });

  it("names what is missing", () => {
    expect(validateChannelConfig("ntfy", { url: "https://ntfy.sh" })).toMatch(
      /topic/,
    );
    expect(validateChannelConfig("email", { to: "" })).toMatch(/address/);
  });
});

describe("helpers", () => {
  it("splits email recipients on commas, semicolons and spaces", () => {
    expect(parseRecipients("a@x.io, b@x.io;c@x.io  d@x.io")).toEqual([
      "a@x.io",
      "b@x.io",
      "c@x.io",
      "d@x.io",
    ]);
  });

  it("matches categories by pattern", () => {
    expect(matchesCategory("*", "docker.stopped")).toBe(true);
    expect(matchesCategory("", "docker.stopped")).toBe(true);
    expect(matchesCategory("docker.*", "docker.stopped")).toBe(true);
    expect(matchesCategory("docker.*", "dockerx.stopped")).toBe(false);
    expect(
      matchesCategory("acme-ssl.renewal_failed", "acme-ssl.renewal_failed"),
    ).toBe(true);
    expect(matchesCategory("acme-ssl.renewal_failed", "acme-ssl.other")).toBe(
      false,
    );
  });

  it("orders severities with success alongside info", () => {
    expect(severityRank("info")).toBe(severityRank("success"));
    expect(severityRank("warning")).toBeGreaterThan(severityRank("info"));
    expect(severityRank("critical")).toBeGreaterThan(severityRank("warning"));
  });

  it("reads the admin allowlist leniently", () => {
    expect(parseAllowlist('["NTFY.lan", " mail.lan ", 3]')).toEqual([
      "ntfy.lan",
      "mail.lan",
    ]);
    expect(parseAllowlist("not json")).toEqual([]);
    expect(parseAllowlist(null)).toEqual([]);
  });

  it("keeps only a safe tab id and an http(s) url in a link", () => {
    expect(cleanLink({ tab: "docker", url: "https://a.example" })).toEqual({
      tab: "docker",
      url: "https://a.example",
    });
    expect(cleanLink({ tab: "../../x", url: "file:///etc/passwd" })).toBeNull();
    expect(cleanLink("docker")).toBeNull();
  });
});