import { ErrorCode, type SignupInput } from "@batch-cooking/shared";
import { faker } from "@faker-js/faker";
import { expect } from "chai";
import type { Express } from "express";
import request from "supertest";
import { createApp } from "../src/app.js";
import { prisma } from "../src/db/prisma.js";
import { resetDatabase } from "../test-support/reset-db.js";

function buildSignupPayload(): SignupInput {
  const firstName = faker.person.firstName();
  const lastName = faker.person.lastName();
  return {
    firstName,
    lastName,
    email: faker.internet.email({ firstName, lastName }).toLowerCase(),
    password: faker.internet.password({ length: 16 }),
  };
}

/** Signs up a fresh profile on a brand new agent (its own cookie jar) and returns both. */
async function signupAgent(app: Express) {
  const agent = request.agent(app);
  const res = await agent.post("/auth/signup").send(buildSignupPayload());
  return { agent, profile: res.body };
}

describe("Household", () => {
  const app = createApp();

  beforeEach(async () => {
    await resetDatabase();
  });

  after(async () => {
    await prisma.$disconnect();
  });

  describe("GET /house/current", () => {
    it("rejects requests without a session cookie with 401 NOT_AUTHENTICATED", async () => {
      const res = await request(app).get("/house/current");

      expect(res.status).to.equal(401);
      expect(res.body.code).to.equal(ErrorCode.NOT_AUTHENTICATED);
    });

    it("returns null when the profile has no household yet", async () => {
      const { agent } = await signupAgent(app);

      const res = await agent.get("/house/current");

      expect(res.status).to.equal(200);
      expect(res.body).to.equal(null);
    });

    it("returns the household with its admin and member list, once created", async () => {
      const { agent, profile } = await signupAgent(app);
      await agent.post("/house").send({ name: "Chez Alice" });

      const res = await agent.get("/house/current");

      expect(res.status).to.equal(200);
      expect(res.body.name).to.equal("Chez Alice");
      expect(res.body.adminId).to.equal(profile.id);
      expect(res.body.inviteCode).to.match(/^[A-Z2-9]{8}$/);
      expect(res.body.members).to.deep.equal([
        { id: profile.id, firstName: profile.firstName, lastName: profile.lastName },
      ]);
    });
  });

  describe("PATCH /house/current", () => {
    it("rejects requests without a session cookie with 401 NOT_AUTHENTICATED", async () => {
      const res = await request(app).patch("/house/current").send({ name: "Chez nous" });

      expect(res.status).to.equal(401);
      expect(res.body.code).to.equal(ErrorCode.NOT_AUTHENTICATED);
    });

    it("rejects renaming when the profile has no household yet with 404 HOUSE_NOT_FOUND", async () => {
      const { agent } = await signupAgent(app);

      const res = await agent.patch("/house/current").send({ name: "Chez nous" });

      expect(res.status).to.equal(404);
      expect(res.body.code).to.equal(ErrorCode.HOUSE_NOT_FOUND);
    });

    it("renames the household", async () => {
      const { agent } = await signupAgent(app);
      await agent.post("/house").send({ name: "Chez Alice" });

      const res = await agent.patch("/house/current").send({ name: "Chez les Dupont" });

      expect(res.status).to.equal(200);
      expect(res.body.name).to.equal("Chez les Dupont");

      const refetch = await agent.get("/house/current");
      expect(refetch.body.name).to.equal("Chez les Dupont");
    });

    it("rejects an empty name with 400 VALIDATION_ERROR", async () => {
      const { agent } = await signupAgent(app);
      await agent.post("/house").send({ name: "Chez Alice" });

      const res = await agent.patch("/house/current").send({ name: "" });

      expect(res.status).to.equal(400);
      expect(res.body.code).to.equal(ErrorCode.VALIDATION_ERROR);
    });
  });

  describe("POST /house", () => {
    it("rejects requests without a session cookie with 401 NOT_AUTHENTICATED", async () => {
      const res = await request(app).post("/house").send({ name: "Chez nous" });

      expect(res.status).to.equal(401);
      expect(res.body.code).to.equal(ErrorCode.NOT_AUTHENTICATED);
    });

    it("creates a household with the caller as its admin", async () => {
      const { agent, profile } = await signupAgent(app);

      const res = await agent.post("/house").send({ name: "Chez Alice" });

      expect(res.status).to.equal(201);
      expect(res.body.name).to.equal("Chez Alice");
      expect(res.body.adminId).to.equal(profile.id);

      const me = await agent.get("/auth/me");
      expect(me.body.houseId).to.equal(res.body.id);
    });

    it("rejects an empty name with 400 VALIDATION_ERROR", async () => {
      const { agent } = await signupAgent(app);

      const res = await agent.post("/house").send({ name: "" });

      expect(res.status).to.equal(400);
      expect(res.body.code).to.equal(ErrorCode.VALIDATION_ERROR);
    });

    it("rejects creating a second household with 409 ALREADY_HAS_HOUSE", async () => {
      const { agent } = await signupAgent(app);
      await agent.post("/house").send({ name: "Chez Alice" });

      const res = await agent.post("/house").send({ name: "Chez Alice bis" });

      expect(res.status).to.equal(409);
      expect(res.body.code).to.equal(ErrorCode.ALREADY_HAS_HOUSE);
    });
  });

  describe("POST /house/join", () => {
    it("rejects requests without a session cookie with 401 NOT_AUTHENTICATED", async () => {
      const res = await request(app).post("/house/join").send({ inviteCode: "ABCDEFGH" });

      expect(res.status).to.equal(401);
      expect(res.body.code).to.equal(ErrorCode.NOT_AUTHENTICATED);
    });

    it("joins an existing household by invite code", async () => {
      const { agent: adminAgent } = await signupAgent(app);
      const created = await adminAgent.post("/house").send({ name: "Chez Alice" });
      const { agent: joinerAgent, profile: joiner } = await signupAgent(app);

      const res = await joinerAgent
        .post("/house/join")
        .send({ inviteCode: created.body.inviteCode });

      expect(res.status).to.equal(200);
      expect(res.body.id).to.equal(created.body.id);
      expect(res.body.members.map((m: { id: number }) => m.id)).to.include(joiner.id);
    });

    it("rejects an unknown invite code with 404 INVITE_CODE_NOT_FOUND", async () => {
      const { agent } = await signupAgent(app);

      const res = await agent.post("/house/join").send({ inviteCode: "ZZZZZZZZ" });

      expect(res.status).to.equal(404);
      expect(res.body.code).to.equal(ErrorCode.INVITE_CODE_NOT_FOUND);
    });

    it("rejects joining when the profile already belongs to a household with 409 ALREADY_HAS_HOUSE", async () => {
      const { agent: adminAgent } = await signupAgent(app);
      const created = await adminAgent.post("/house").send({ name: "Chez Alice" });
      const { agent } = await signupAgent(app);
      await agent.post("/house").send({ name: "Chez Bob" });

      const res = await agent.post("/house/join").send({ inviteCode: created.body.inviteCode });

      expect(res.status).to.equal(409);
      expect(res.body.code).to.equal(ErrorCode.ALREADY_HAS_HOUSE);
    });
  });

  describe("POST /house/leave", () => {
    it("rejects requests without a session cookie with 401 NOT_AUTHENTICATED", async () => {
      const res = await request(app).post("/house/leave");

      expect(res.status).to.equal(401);
      expect(res.body.code).to.equal(ErrorCode.NOT_AUTHENTICATED);
    });

    it("rejects leaving when the profile has no household with 404 HOUSE_NOT_FOUND", async () => {
      const { agent } = await signupAgent(app);

      const res = await agent.post("/house/leave");

      expect(res.status).to.equal(404);
      expect(res.body.code).to.equal(ErrorCode.HOUSE_NOT_FOUND);
    });

    it("deletes the household when its sole member leaves", async () => {
      const { agent } = await signupAgent(app);
      const created = await agent.post("/house").send({ name: "Chez Alice" });

      const res = await agent.post("/house/leave");

      expect(res.status).to.equal(204);
      expect(await prisma.house.findUnique({ where: { id: created.body.id } })).to.equal(null);
    });

    it("transfers adminship to the remaining member when the admin leaves", async () => {
      const { agent: adminAgent } = await signupAgent(app);
      const created = await adminAgent.post("/house").send({ name: "Chez Alice" });
      const { agent: memberAgent, profile: member } = await signupAgent(app);
      await memberAgent.post("/house/join").send({ inviteCode: created.body.inviteCode });

      const res = await adminAgent.post("/house/leave");

      expect(res.status).to.equal(204);
      const house = await prisma.house.findUnique({ where: { id: created.body.id } });
      expect(house?.adminId).to.equal(member.id);
    });
  });

  describe("DELETE /house/current", () => {
    it("rejects requests without a session cookie with 401 NOT_AUTHENTICATED", async () => {
      const res = await request(app).delete("/house/current");

      expect(res.status).to.equal(401);
      expect(res.body.code).to.equal(ErrorCode.NOT_AUTHENTICATED);
    });

    it("rejects deleting when the profile has no household with 404 HOUSE_NOT_FOUND", async () => {
      const { agent } = await signupAgent(app);

      const res = await agent.delete("/house/current");

      expect(res.status).to.equal(404);
      expect(res.body.code).to.equal(ErrorCode.HOUSE_NOT_FOUND);
    });

    it("rejects a non-admin member with 403 NOT_HOUSE_ADMIN", async () => {
      const { agent: adminAgent } = await signupAgent(app);
      const created = await adminAgent.post("/house").send({ name: "Chez Alice" });
      const { agent: memberAgent } = await signupAgent(app);
      await memberAgent.post("/house/join").send({ inviteCode: created.body.inviteCode });

      const res = await memberAgent.delete("/house/current");

      expect(res.status).to.equal(403);
      expect(res.body.code).to.equal(ErrorCode.NOT_HOUSE_ADMIN);
    });

    it("deletes the household for every member, cascading its plannings", async () => {
      const { agent: adminAgent } = await signupAgent(app);
      const created = await adminAgent.post("/house").send({ name: "Chez Alice" });
      const { agent: memberAgent, profile: member } = await signupAgent(app);
      await memberAgent.post("/house/join").send({ inviteCode: created.body.inviteCode });
      const planning = await prisma.planning.create({
        data: {
          houseId: created.body.id,
          startDate: new Date(Date.UTC(2000, 0, 1)),
          finishDate: new Date(Date.UTC(2000, 0, 7)),
        },
      });

      const res = await adminAgent.delete("/house/current");

      expect(res.status).to.equal(204);
      expect(await prisma.house.findUnique({ where: { id: created.body.id } })).to.equal(null);
      expect(await prisma.planning.findUnique({ where: { id: planning.id } })).to.equal(null);
      const memberProfile = await prisma.userProfile.findUniqueOrThrow({
        where: { id: member.id },
      });
      expect(memberProfile.houseId).to.equal(null);
    });
  });

  describe("DELETE /house/members/:memberId", () => {
    it("rejects requests without a session cookie with 401 NOT_AUTHENTICATED", async () => {
      const res = await request(app).delete("/house/members/1");

      expect(res.status).to.equal(401);
      expect(res.body.code).to.equal(ErrorCode.NOT_AUTHENTICATED);
    });

    it("rejects a non-admin member with 403 NOT_HOUSE_ADMIN", async () => {
      const { agent: adminAgent, profile: admin } = await signupAgent(app);
      const created = await adminAgent.post("/house").send({ name: "Chez Alice" });
      const { agent: memberAgent } = await signupAgent(app);
      await memberAgent.post("/house/join").send({ inviteCode: created.body.inviteCode });

      const res = await memberAgent.delete(`/house/members/${admin.id}`);

      expect(res.status).to.equal(403);
      expect(res.body.code).to.equal(ErrorCode.NOT_HOUSE_ADMIN);
    });

    it("rejects the admin trying to remove themselves with 400 VALIDATION_ERROR", async () => {
      const { agent: adminAgent, profile: admin } = await signupAgent(app);
      await adminAgent.post("/house").send({ name: "Chez Alice" });

      const res = await adminAgent.delete(`/house/members/${admin.id}`);

      expect(res.status).to.equal(400);
      expect(res.body.code).to.equal(ErrorCode.VALIDATION_ERROR);
    });

    it("removes the targeted member from the household", async () => {
      const { agent: adminAgent } = await signupAgent(app);
      const created = await adminAgent.post("/house").send({ name: "Chez Alice" });
      const { agent: memberAgent, profile: member } = await signupAgent(app);
      await memberAgent.post("/house/join").send({ inviteCode: created.body.inviteCode });

      const res = await adminAgent.delete(`/house/members/${member.id}`);

      expect(res.status).to.equal(200);
      expect(res.body.members.map((m: { id: number }) => m.id)).to.not.include(member.id);
      const memberProfile = await prisma.userProfile.findUniqueOrThrow({
        where: { id: member.id },
      });
      expect(memberProfile.houseId).to.equal(null);
    });
  });
});