import { readFileSync } from "node:fs";
import { join } from "node:path";
import { describe, expect, it } from "@suaveplan/testing/runner";

const pkgRoot = join(__dirname, "..");
const pkg = JSON.parse(readFileSync(join(pkgRoot, "package.json"), "utf8")) as {
    name: string;
    sideEffects: boolean;
    dependencies: Record<string, string>;
};

describe("dep-graph invariants", () => {
    it("declares sideEffects: false", { timeout: 5000 }, () => {
        expect(pkg.sideEffects).toBe(false);
    });

    it("declares the expected runtime dependencies", { timeout: 5000 }, () => {
        expect(Object.keys(pkg.dependencies).sort()).toEqual([
            "@suaveplan/currency",
            "@suaveplan/currency-providers",
            "@suaveplan/error",
            "@suaveplan/types",
            "tslib",
        ]);
    });

    it("uses workspace:^ for every @suaveplan/* dep", { timeout: 5000 }, () => {
        for (const [name, range] of Object.entries(pkg.dependencies)) {
            if (name.startsWith("@suaveplan/")) {
                expect(range).toBe("workspace:^");
            }
        }
    });

    it("pins package name and version baseline", { timeout: 5000 }, () => {
        expect(pkg.name).toBe(
            "@suaveplan/currency-provider-open-exchange-rates"
        );
    });
});