import { describe, expect, it } from "@suaveplan/testing/runner";
import { COMPILER_ABI_VERSION, writeManifest } from "./manifest.js";

describe("writeManifest", () => {
    it("emits a manifest mirroring the supplied routes", {
        timeout: 5000,
    }, async () => {
        const writes: Array<[string, string]> = [];
        const manifest = await writeManifest({
            manifestPath: "/tmp/x.wasm.json",
            routes: [
                { method: "GET", path: "/a" },
                { method: "POST", path: "/b" },
            ],
            bundledJs: "var plugin = {};",
            javyVersion: "v8.1.1",
            compilerVersion: "0.1.0",
            compiledAt: "2026-01-01T00:00:00.000Z",
            fsWrite: async (p, d) => {
                writes.push([p, d]);
            },
        });
        expect(manifest.routes).toHaveLength(2);
        expect(manifest.abiVariant).toBe("wasi-stdio");
        expect(manifest.abiVersion).toBe(COMPILER_ABI_VERSION);
        expect(manifest.javyVersion).toBe("v8.1.1");
        expect(manifest.compilerVersion).toBe("0.1.0");
        expect(manifest.compiledAt).toBe("2026-01-01T00:00:00.000Z");
        expect(manifest.sourceDigest).toHaveLength(64);
        expect(writes).toHaveLength(1);
        expect(writes[0]?.[0]).toBe("/tmp/x.wasm.json");
        const reparsed = JSON.parse(writes[0]?.[1] ?? "{}");
        expect(reparsed.routes).toHaveLength(2);
    });

    it("raises MANIFEST_MISSING_ROUTES on empty routes", {
        timeout: 5000,
    }, async () => {
        await expect(
            writeManifest({
                manifestPath: "/tmp/x.wasm.json",
                routes: [],
                bundledJs: "",
                javyVersion: "v8.1.1",
                compilerVersion: "0.1.0",
                fsWrite: async () => undefined,
            })
        ).rejects.toMatchObject({
            code: "WASM_COMPILER.MANIFEST_MISSING_ROUTES",
        });
    });

    it("defaults compiledAt to the current ISO timestamp", {
        timeout: 5000,
    }, async () => {
        const manifest = await writeManifest({
            manifestPath: "/tmp/y.wasm.json",
            routes: [{ method: "GET", path: "/x" }],
            bundledJs: "var plugin = {};",
            javyVersion: "v8.1.1",
            compilerVersion: "0.1.0",
            fsWrite: async () => undefined,
        });
        // ISO 8601 format check
        expect(manifest.compiledAt.endsWith("Z")).toBe(true);
        expect(manifest.compiledAt.includes("T")).toBe(true);
    });
});