import { randomUUID } from "node:crypto";
import type { PrismaClient } from "@rakazo/db";
import {
  bootstrapUserSpace,
  createDb,
  createSpaceForMember,
  ensureMainConversation,
  savePushSubscription,
  updateNotificationSettings,
} from "@rakazo/db";
import { afterAll, beforeAll, describe, expect, it, vi } from "vitest";
import { notifyUserFromTool } from "./notify-user-tool.js";
import type { PushPayload, PushSender } from "./push-notifications.js";
import { PushNotificationProvider } from "./push-notifications.js";

const databaseUrl = process.env.DATABASE_URL;
const describePostgres =
  process.env.VERIFY_DATABASE && databaseUrl ? describe.sequential : describe.skip;

const signupEnv = { signupsEnabled: "true", signupAllowlist: "" };
const keys = { p256dh: `B${"A".repeat(86)}`, auth: "A".repeat(22) };

describePostgres("push delivery and notify_user (PostgreSQL)", () => {
  let prisma: PrismaClient;
  let close: () => Promise<void>;
  const userIds: string[] = [];

  async function newUser() {
    const id = `nu${randomUUID().replaceAll("-", "")}`;
    userIds.push(id);
    await prisma.user.create({ data: { id, name: "Ada", email: `${id}@rakazo.test` } });
    await bootstrapUserSpace(prisma, { id }, signupEnv, { claimDeploymentOwner: false });
    const conversation = await ensureMainConversation(prisma, id);
    const main = await prisma.bot.findUniqueOrThrow({
      where: { id: conversation.leadBotId },
      select: { id: true, name: true, kind: true },
    });
    return { userId: id, conversation, main };
  }

  function recordingSender(outcome: "sent" | "gone" = "sent") {
    const sent: PushPayload[] = [];
    const sender: PushSender = {
      send: vi.fn(async (_target, payload: PushPayload) => {
        sent.push(payload);
        return outcome;
      }),
    };
    return { sender, sent };
  }

  function toolContext(user: Awaited<ReturnType<typeof newUser>>, bot = user.main) {
    return {
      userId: user.userId,
      spaceId: user.conversation.spaceId,
      runId: `run-${randomUUID()}`,
      bot,
      signal: new AbortController().signal,
    };
  }

  beforeAll(() => {
    const db = createDb(databaseUrl!);
    prisma = db.prisma;
    close = async () => {
      await db.prisma.$disconnect();
      await db.pool.end();
    };
  });

  afterAll(async () => {
    if (!prisma) return;
    const memberships = await prisma.member.findMany({
      where: { userId: { in: userIds } },
      select: { organizationId: true },
    });
    await prisma.organization.deleteMany({
      where: { id: { in: memberships.map((member) => member.organizationId) } },
    });
    await prisma.user.deleteMany({ where: { id: { in: userIds } } });
    await close();
  });

  it("delivers to each device, links the conversation and drops gone devices", async () => {
    const user = await newUser();
    const browser = `https://push.example.test/${randomUUID()}`;
    await savePushSubscription(prisma, user.userId, {
      kind: "webpush",
      endpoint: browser,
      ...keys,
    });
    await savePushSubscription(prisma, user.userId, {
      kind: "expo",
      endpoint: `ExponentPushToken[${user.userId}]`,
    });
    const web = recordingSender("sent");
    const expo = recordingSender("gone");
    await new PushNotificationProvider(prisma, { webpush: web.sender, expo: expo.sender }).send(
      {
        kind: "completion",
        title: "Chief finished",
        body: "Done",
        botId: user.main.id,
        threadId: user.conversation.threadId,
      },
      {
        operationId: "notify",
        traceId: "notify",
        spaceId: user.conversation.spaceId,
        userId: user.userId,
        signal: new AbortController().signal,
      },
    );
    expect(web.sent[0]?.url).toBe(`/app/g/${user.conversation.groupId}`);
    const devices = await prisma.pushSubscription.findMany({ where: { userId: user.userId } });
    expect(devices).toHaveLength(1);
    expect(devices[0]).toMatchObject({ endpoint: browser, lastUsedAt: expect.any(Date) });
  });

  it("lets only the personal main agent nudge, within the user's settings and the daily cap", async () => {
    const user = await newUser();
    const web = recordingSender();
    const deps = {
      prisma,
      notifications: new PushNotificationProvider(prisma, { webpush: web.sender }),
    };

    await expect(
      notifyUserFromTool(deps, toolContext(user, { ...user.main, kind: "specialist" }), {
        body: "Hi",
      }),
    ).resolves.toEqual({ error: "Only the user's main bot can notify the user." });
    // A project's main bot leads its project; nudging the user is the personal agent's job.
    const project = await createSpaceForMember(prisma, {
      currentSpaceId: user.conversation.spaceId,
      userId: user.userId,
      name: "Launch",
    });
    const lead = await ensureMainConversation(prisma, user.userId, project.id);
    await expect(
      notifyUserFromTool(
        deps,
        { ...toolContext(user, { ...user.main, id: lead.leadBotId }), spaceId: project.id },
        { body: "Hi" },
      ),
    ).resolves.toEqual({ error: "Only the user's main bot can notify the user." });
    await expect(notifyUserFromTool(deps, toolContext(user), {})).resolves.toMatchObject({
      error: expect.stringContaining("body is required"),
    });
    await expect(
      notifyUserFromTool({ prisma }, toolContext(user), { body: "Hi" }),
    ).resolves.toMatchObject({ sent: false });
    await expect(notifyUserFromTool(deps, toolContext(user), { body: "Hi" })).resolves.toEqual({
      sent: false,
      reason: "The user has no device with notifications turned on.",
    });

    await savePushSubscription(prisma, user.userId, {
      kind: "webpush",
      endpoint: `https://push.example.test/${randomUUID()}`,
      ...keys,
    });
    await updateNotificationSettings(prisma, user.userId, { nudges: false });
    await expect(notifyUserFromTool(deps, toolContext(user), { body: "Hi" })).resolves.toEqual({
      sent: false,
      reason: "The user turned nudges off.",
    });

    // Quiet hours around the current time.
    await updateNotificationSettings(prisma, user.userId, {
      nudges: true,
      quietHours: quietAroundNow(),
    });
    await expect(notifyUserFromTool(deps, toolContext(user), { body: "Hi" })).resolves.toEqual({
      sent: false,
      reason: "It is the user's quiet hours.",
    });
    expect(web.sent).toHaveLength(0);

    await updateNotificationSettings(prisma, user.userId, { quietHours: null });
    for (let index = 0; index < 3; index += 1) {
      await expect(
        notifyUserFromTool(deps, toolContext(user), { body: `Check-in ${index}` }),
      ).resolves.toEqual({ sent: true });
    }
    await expect(
      notifyUserFromTool(deps, toolContext(user), { body: "One too many" }),
    ).resolves.toEqual({ sent: false, reason: "The daily limit of 3 nudges is reached." });

    expect(web.sent).toHaveLength(3);
    expect(web.sent[0]).toMatchObject({
      kind: "nudge",
      title: user.main.name,
      body: "Check-in 0",
      threadId: user.conversation.threadId,
      url: `/app/g/${user.conversation.groupId}`,
    });
  });

  it("reports a nudge no device accepted", async () => {
    const user = await newUser();
    await savePushSubscription(prisma, user.userId, {
      kind: "webpush",
      endpoint: `https://push.example.test/${randomUUID()}`,
      ...keys,
    });
    const failing: PushSender = {
      send: async () => {
        throw new Error("Web push failed (500)");
      },
    };
    await expect(
      notifyUserFromTool(
        { prisma, notifications: new PushNotificationProvider(prisma, { webpush: failing }) },
        toolContext(user),
        { body: "Hi", title: "Evening check-in" },
      ),
    ).resolves.toEqual({ sent: false, reason: "No device accepted the notification." });
  });
});

/** A UTC range that covers the current minute (users without a time zone use UTC). */
function quietAroundNow() {
  const now = new Date();
  const minute = now.getUTCHours() * 60 + now.getUTCMinutes();
  const clock = (value: number) => {
    const wrapped = (value + 1440) % 1440;
    return `${String(Math.floor(wrapped / 60)).padStart(2, "0")}:${String(wrapped % 60).padStart(2, "0")}`;
  };
  return { start: clock(minute - 60), end: clock(minute + 60) };
}