import { describe, it, before, after } from "node:test";
import assert from "node:assert/strict";
import { WrappedNodeSqliteDb } from "../../../src/db/sqlite/impl/node-sqlite.js";
import { sql, unsafeSql } from "../../../src/db/sqlite/sql.js";
import type { WrappedDb } from "../../../src/db/sqlite/impl/types.js";

function runWrappedDbSuite(name: string, makeDb: () => WrappedDb) {
  describe(`${name}: WrappedDb`, () => {
    let db: WrappedDb;

    before(() => {
      db = makeDb();
      db.run(unsafeSql("CREATE TABLE IF NOT EXISTS test (id INTEGER PRIMARY KEY, val TEXT NOT NULL)"));
    });

    after(() => db.destroy());

    it("run INSERT returns changes count", () => {
      const { changes } = db.run(sql`INSERT INTO test(val) VALUES(${{ text: "hello" }})`);
      assert.equal(changes, 1);
    });

    it("all SELECT returns all rows", () => {
      db.run(unsafeSql("DELETE FROM test"));
      db.run(sql`INSERT INTO test(val) VALUES(${{ text: "a" }})`);
      db.run(sql`INSERT INTO test(val) VALUES(${{ text: "b" }})`);
      const rows = db.all<{ val: string }>(unsafeSql("SELECT val FROM test ORDER BY val"));
      assert.equal(rows.length, 2);
      assert.equal(rows[0].val, "a");
      assert.equal(rows[1].val, "b");
    });

    it("get returns single row or null", () => {
      db.run(unsafeSql("DELETE FROM test"));
      db.run(sql`INSERT INTO test(val) VALUES(${{ text: "one" }})`);
      const row = db.get<{ val: string }>(unsafeSql("SELECT val FROM test"));
      assert.ok(row !== null);
      assert.equal(row.val, "one");

      const none = db.get<{ val: string }>(
        sql`SELECT val FROM test WHERE val = ${{ text: "none" }}`
      );
      assert.equal(none, null);
    });

    it("get throws when multiple rows match", () => {
      db.run(unsafeSql("DELETE FROM test"));
      db.run(sql`INSERT INTO test(val) VALUES(${{ text: "dup1" }})`);
      db.run(sql`INSERT INTO test(val) VALUES(${{ text: "dup2" }})`);
      assert.throws(
        () => db.get<{ val: string }>(unsafeSql("SELECT val FROM test")),
        /Multiple results/
      );
    });

    it("multi commits on success", () => {
      db.run(unsafeSql("DELETE FROM test"));
      db.multi(() => {
        db.run(sql`INSERT INTO test(val) VALUES(${{ text: "in-tx" }})`);
      });
      const rows = db.all<{ val: string }>(unsafeSql("SELECT val FROM test"));
      assert.equal(rows.length, 1);
      assert.equal(rows[0].val, "in-tx");
    });

    it("multi rolls back on error", () => {
      db.run(unsafeSql("DELETE FROM test"));
      assert.throws(() =>
        db.multi(() => {
          db.run(sql`INSERT INTO test(val) VALUES(${{ text: "rollback" }})`);
          throw new Error("abort!");
        })
      );
      const rows = db.all<{ val: string }>(unsafeSql("SELECT val FROM test"));
      assert.equal(rows.length, 0);
    });

    it("rethrow passes through return value", () => {
      const result = db.rethrow(() => 42);
      assert.equal(result, 42);
    });

    it("rethrow propagates non-SQLite errors unchanged", () => {
      const err = new Error("custom error");
      assert.throws(() => db.rethrow(() => { throw err; }), (e) => e === err);
    });
  });
}

runWrappedDbSuite("node-sqlite", () => new WrappedNodeSqliteDb(":memory:"));

describe("better-sqlite3 WrappedDb", async () => {
  let bs3Ctor: (new (path: string) => WrappedDb) | null = null;

  try {
    const mod = await import(
      "../../../src/db/sqlite/impl/better-sqlite3.js"
    );
    bs3Ctor = mod.WrappedBetterSqlite3Db;
  } catch {
    // better-sqlite3 not available, skip
  }

  if (bs3Ctor) {
    runWrappedDbSuite("better-sqlite3", () => new bs3Ctor!(":memory:"));
  } else {
    it("better-sqlite3 is not available - skipped", (t) => {
      t.skip("better-sqlite3 optional dependency not found");
    });
  }
});