import { Database } from "bun:sqlite";
import { expect, test } from "bun:test";
import { Prequel, Table } from "../src/index";

interface UserWithID {
  user_id: number;
  name: string;
}

interface UserWithBio {
  user_id: number;
  bio: {
    name: string;
    age: number;
  };
}

interface Post {
  post_id: number;
  user_id: number;
}

interface UserWithNullable extends UserWithID {
  bio: string | null;
}

function makeTestTable(): Table<UserWithID> {
  const db = new Database();
  return new Table<UserWithID>(db, "Users", {
    user_id: {
      type: "INTEGER",
      primary: true,
    },
    name: "TEXT",
  });
}

test("constructor", () => {
  const db = new Database();
  const table = new Table<UserWithID>(db, "Users", {
    user_id: {
      type: "INTEGER",
      primary: true,
    },
    name: "TEXT",
  });

  expect(table.name).toEqual("Users");
  expect(table.db).toBe(db);
  expect(table.columns).toEqual(["user_id", "name"]);
});

test("constructor -> auto-attach to a prequel isntance", () => {
  const db = new Prequel();
  const table = new Table<UserWithID>(db, "Users", {
    user_id: {
      type: "INTEGER",
      primary: true,
    },
    name: "TEXT",
  });

  expect(Object.values(db.tables)).toContain(table);
});

test(".toString() resolves to the table name for embedding in queries", () => {
  const table = makeTestTable();
  expect(`${table}`).toEqual('"Users"');
});

test(".reference() creates a default reference to the primary column", () => {
  const table = makeTestTable();
  expect(table.reference()).toEqual("Users(user_id)");
});

test(".reference() creates a reference to the specified column", () => {
  const table = makeTestTable();
  expect(table.reference("name")).toEqual("Users(name)");
});

test(".insert() inserts a full row", () => {
  const table = makeTestTable();
  table.insert({
    user_id: 100,
    name: "Jack",
  });

  const lookup = table.db.prepare<UserWithID, number>(
    `SELECT * FROM ${table} WHERE user_id = ?`,
  );
  const found = lookup.get(100);
  expect(found).toEqual({
    user_id: 100,
    name: "Jack",
  });
});

test(".insert() is able to insert nulls to nullable fields", () => {
  const table = new Table<UserWithNullable>(new Database(), "Users", {
    user_id: {
      type: "INTEGER",
      primary: true,
    },
    name: "TEXT",
    bio: {
      type: "TEXT",
      nullable: true,
    },
  });

  table.insert({
    user_id: 1,
    name: "Jack",
    bio: null,
  });

  const lookup = table.db.prepare<UserWithNullable, number>(
    `SELECT * FROM ${table} WHERE user_id = ?`,
  );
  const found = lookup.get(1);

  expect(found?.bio).toBeNull();
});

test(".insertPartial() inserts a partial row", () => {
  const table = makeTestTable();
  table.insertPartial({
    name: "Jack",
  });

  const lookup = table.db.prepare<UserWithID, string>(
    `SELECT * FROM ${table} WHERE name = ?`,
  );
  const found = lookup.get("Jack");
  expect(found).toEqual({
    user_id: 1,
    name: "Jack",
  });
});

test(".insertWithout() inserts a partial row with type safety", () => {
  const table = makeTestTable();
  table.insertWithout<"user_id">({
    name: "Jack",
  });

  const lookup = table.db.prepare<UserWithID, string>(
    `SELECT * FROM ${table} WHERE name = ?`,
  );
  const found = lookup.get("Jack");
  expect(found).toEqual({
    user_id: 1,
    name: "Jack",
  });
});

test(".count() gets the current number of rows in the table", () => {
  const table = makeTestTable();
  table.insertPartial({ name: "Jack" });
  table.insertPartial({ name: "Kate" });
  table.insertPartial({ name: "Sayid" });
  expect(table.count()).toBe(3);
});

test(".countWhere() gets the current number of rows that match a condition", () => {
  const table = makeTestTable();
  table.insertPartial({ name: "Jack" });
  table.insertPartial({ name: "Kate" });
  table.insertPartial({ name: "Sayid" });
  expect(table.countWhere({ name: "Jack" })).toBe(1);
});

test(".findAll() returns the full table", () => {
  const table = makeTestTable();
  table.insertPartial({ name: "Jack" });
  table.insertPartial({ name: "Kate" });
  table.insertPartial({ name: "Sayid" });
  const allUsers = table.findAll();

  expect(allUsers).toHaveLength(3);
  expect(allUsers[0]).toEqual({ user_id: 1, name: "Jack" });
  expect(allUsers[1]).toEqual({ user_id: 2, name: "Kate" });
  expect(allUsers[2]).toEqual({ user_id: 3, name: "Sayid" });
});

test(".query() returns a prepared statement for the table", () => {
  const table = makeTestTable();
  const query = table.query("SELECT * FROM Users WHERE name = ?");
  expect(query).toBeDefined();
});

test(".findOneWhere() returns a row based on basic criteria", () => {
  const table = makeTestTable();
  table.insertPartial({ name: "Jack" });
  table.insertPartial({ name: "Kate" });
  table.insertPartial({ name: "Sayid" });

  const sayid = table.findOneWhere({ name: "Sayid" });

  expect(sayid).toEqual({ user_id: 3, name: "Sayid" });
});

test(".findOneWhereOrFail() throws if it finds nothing", () => {
  const table = makeTestTable();

  expect(() => {
    table.findOneWhereOrFail({ name: "Sayid" });
  }).toThrow();
});

test(".findAllWhere() returns a row based on basic criteria", () => {
  const table = makeTestTable();
  table.insertPartial({ name: "Jack" });
  table.insertPartial({ name: "Jack" });
  table.insertPartial({ name: "Jack" });

  const manyJacks = table.findAllWhere({ name: "Jack" });

  expect(manyJacks).toHaveLength(3);
  expect(manyJacks[0]).toEqual({ user_id: 1, name: "Jack" });
  expect(manyJacks[1]).toEqual({ user_id: 2, name: "Jack" });
  expect(manyJacks[2]).toEqual({ user_id: 3, name: "Jack" });
});

test(".findOneById() returns a single element by its primary column", () => {
  const table = makeTestTable();

  table.insertPartial({ name: "Jack" });
  table.insertPartial({ name: "Kate" });
  table.insertPartial({ name: "Sayid" });

  const sayid = table.findOneById(3);
  expect(sayid).toEqual({ user_id: 3, name: "Sayid" });
});

test(".findOneById() returns null when nothing was found", () => {
  const table = makeTestTable();
  const nobody = table.findOneById(3);
  expect(nobody).toBeNull();
});

test(".findOneByIdOrFail() returns a single element by its primary column", () => {
  const table = makeTestTable();

  table.insertPartial({ name: "Jack" });
  table.insertPartial({ name: "Kate" });
  table.insertPartial({ name: "Sayid" });

  const sayid = table.findOneById(3);
  expect(sayid).toEqual({ user_id: 3, name: "Sayid" });
});

test(".findOneByIdOrFail() throws an error when nothing is found", () => {
  const table = makeTestTable();
  expect(() => {
    table.findOneByIdOrFail(3);
  }).toThrow();
});

test(".delete() deletes a full record", () => {
  const table = makeTestTable();
  table.insertPartial({ name: "Jack" });
  table.insertPartial({ name: "Kate" });
  table.insertPartial({ name: "Sayid" });

  expect(table.size()).toBe(3);

  table.delete(table.findOneByIdOrFail(2));

  expect(table.size()).toBe(2);

  expect(table.findAll()).toEqual([
    { user_id: 1, name: "Jack" },
    { user_id: 3, name: "Sayid" },
  ]);
});

test(".deleteById() deletes the element with the given primary value", () => {
  const table = makeTestTable();
  table.insertPartial({ name: "Jack" });
  table.insertPartial({ name: "Kate" });
  table.insertPartial({ name: "Sayid" });

  expect(table.size()).toBe(3);

  table.deleteById(2);

  expect(table.size()).toBe(2);

  expect(table.findAll()).toEqual([
    { user_id: 1, name: "Jack" },
    { user_id: 3, name: "Sayid" },
  ]);
});

test(".deleteWhere() deletes all rows that match", () => {
  const table = makeTestTable();
  table.insertPartial({ name: "Jack" });
  table.insertPartial({ name: "Jack" });
  table.insertPartial({ name: "Sayid" });

  expect(table.size()).toBe(3);

  table.deleteWhere({ name: "Jack" });

  expect(table.size()).toBe(1);

  expect(table.findAll()).toEqual([{ user_id: 3, name: "Sayid" }]);
});

test(".deleteById() respects when references are set to cascade", () => {
  const pq = new Prequel();
  const users = pq.table<UserWithID>("Users", {
    user_id: {
      type: "INTEGER",
      primary: true,
    },
    name: "TEXT",
  });

  const posts = pq.table<Post>("Posts", {
    post_id: {
      type: "INTEGER",
      primary: true,
    },
    user_id: {
      type: "INTEGER",
      references: users.reference(),
      cascade: true,
    },
  });

  const user = users.insertPartial({ name: "Bob" });
  posts.insertPartial({
    user_id: user.user_id,
  });

  users.deleteById(user.user_id);
  expect(posts.size()).toBe(0);
});

test(".deleteAll() deletes all rows in the table", () => {
  const table = makeTestTable();
  table.insertPartial({ name: "Jack" });
  table.insertPartial({ name: "Kate" });
  table.insertPartial({ name: "Sayid" });

  expect(table.count()).toBe(3);

  table.deleteAll();

  expect(table.count()).toBe(0);
});

test(".update() updates a full record", () => {
  const table = makeTestTable();
  const locke = table.insertPartial({ name: "Locke" });
  table.insertPartial({ name: "Kate" });
  table.insertPartial({ name: "Sayid" });

  locke.name = "Jeremy Bentham";
  table.update(locke);

  const newLocke = table.findOneById(1);
  expect(newLocke?.name).toEqual("Jeremy Bentham");
});

test(".update() throws if no primary column is set besides ROWID", () => {
  const db = new Database();
  const table = new Table<UserWithID>(db, "Users", {
    user_id: "INTEGER",
    name: "TEXT",
  });

  const user = table.insert({ user_id: 1, name: "User" });

  const oops = () => {
    table.update(user);
  };

  expect(oops).toThrow(/primary column/);
});

test(".updateWhere() updates rows based on the condition", () => {
  const db = new Database();
  const table = new Table<UserWithID>(db, "Users", {
    user_id: "INTEGER",
    name: "TEXT",
  });

  table.insert({ user_id: 1, name: "Jack" });
  table.insert({ user_id: 2, name: "Kate" });
  table.insert({ user_id: 3, name: "Sayid" });

  table.updateWhere({ name: "Sawyer" }, { user_id: 2 });
  expect(table.findOneById(2)?.name).toEqual("Sawyer");
});

test(".updateAll() updates all rows in the table", () => {
  const db = new Database();
  const table = new Table<UserWithID>(db, "Users", {
    user_id: "INTEGER",
    name: "TEXT",
  });

  table.insert({ user_id: 1, name: "Jack" });
  table.insert({ user_id: 2, name: "Kate" });
  table.insert({ user_id: 3, name: "Sayid" });

  table.updateAll({ name: "Sawyer" });
  expect(table.findAll().map((u) => u.name)).toEqual([
    "Sawyer",
    "Sawyer",
    "Sawyer",
  ]);
});