import { describe, expect, it, vi } from "@suaveplan/testing/runner";
import {
    STORAGE_HTTP_CODES,
    StorageHttpError,
} from "../error-codes/error-codes.js";
import { defaultFetch, isAbortError } from "./fetch-adapter.js";

describe("defaultFetch", () => {
    it("forwards a string URL to globalThis.fetch", {
        timeout: 5000,
    }, async () => {
        const spy = vi
            .spyOn(globalThis, "fetch")
            .mockResolvedValueOnce(new Response(new Uint8Array([1])));
        try {
            const fetchFn = defaultFetch();
            const response = await fetchFn("https://example.com/x");
            expect(response.ok).toBe(true);
            expect(spy).toHaveBeenCalledTimes(1);
        } finally {
            spy.mockRestore();
        }
    });

    it("maps network rejection to STORAGE_HTTP.NETWORK_ERROR with URL preserved", {
        timeout: 5000,
    }, async () => {
        const spy = vi
            .spyOn(globalThis, "fetch")
            .mockRejectedValueOnce(new Error("ECONNREFUSED"));
        try {
            const fetchFn = defaultFetch();
            await fetchFn("https://example.com/x");
            expect.fail("expected throw");
        } catch (err) {
            expect(err).toBeInstanceOf(StorageHttpError);
            expect((err as StorageHttpError).code).toBe(
                STORAGE_HTTP_CODES.NETWORK_ERROR
            );
            expect((err as StorageHttpError).url).toBe("https://example.com/x");
        } finally {
            spy.mockRestore();
        }
    });

    it("re-raises AbortError unchanged", { timeout: 5000 }, async () => {
        const abort = Object.assign(new Error("aborted"), {
            name: "AbortError",
        });
        const spy = vi.spyOn(globalThis, "fetch").mockRejectedValueOnce(abort);
        try {
            const fetchFn = defaultFetch();
            await fetchFn("https://example.com/x");
            expect.fail("expected throw");
        } catch (err) {
            expect(err).toBe(abort);
        } finally {
            spy.mockRestore();
        }
    });

    it("resolves URL from a URL object", { timeout: 5000 }, async () => {
        const spy = vi
            .spyOn(globalThis, "fetch")
            .mockRejectedValueOnce(new Error("boom"));
        try {
            const fetchFn = defaultFetch();
            try {
                await fetchFn(new URL("https://example.com/y"));
            } catch (err) {
                expect((err as StorageHttpError).url).toBe(
                    "https://example.com/y"
                );
            }
        } finally {
            spy.mockRestore();
        }
    });

    it("resolves URL from a Request-like input", {
        timeout: 5000,
    }, async () => {
        const spy = vi
            .spyOn(globalThis, "fetch")
            .mockRejectedValueOnce(new Error("boom"));
        try {
            const fetchFn = defaultFetch();
            try {
                await fetchFn({ url: "https://example.com/z" } as Request);
            } catch (err) {
                expect((err as StorageHttpError).url).toBe(
                    "https://example.com/z"
                );
            }
        } finally {
            spy.mockRestore();
        }
    });

    it("falls back to no URL when input is unrecognised shape", {
        timeout: 5000,
    }, async () => {
        const spy = vi
            .spyOn(globalThis, "fetch")
            .mockRejectedValueOnce(new Error("boom"));
        try {
            const fetchFn = defaultFetch();
            try {
                await fetchFn({} as Request);
            } catch (err) {
                expect((err as StorageHttpError).url).toBeUndefined();
            }
        } finally {
            spy.mockRestore();
        }
    });

    it("uses String(err) when the reject value is not an Error", {
        timeout: 5000,
    }, async () => {
        const spy = vi
            .spyOn(globalThis, "fetch")
            .mockRejectedValueOnce("boom-string");
        try {
            const fetchFn = defaultFetch();
            try {
                await fetchFn("https://example.com/x");
            } catch (err) {
                expect((err as StorageHttpError).message).toContain(
                    "boom-string"
                );
                expect((err as StorageHttpError).cause).toBeUndefined();
            }
        } finally {
            spy.mockRestore();
        }
    });

    it("maps non-Error rejection on an input with no URL", {
        timeout: 5000,
    }, async () => {
        const spy = vi
            .spyOn(globalThis, "fetch")
            .mockRejectedValueOnce("boom-no-url");
        try {
            const fetchFn = defaultFetch();
            try {
                await fetchFn({} as Request);
            } catch (err) {
                expect((err as StorageHttpError).url).toBeUndefined();
                expect((err as StorageHttpError).cause).toBeUndefined();
            }
        } finally {
            spy.mockRestore();
        }
    });
});

describe("isAbortError", () => {
    it("returns true for AbortError-shaped objects", { timeout: 5000 }, () => {
        expect(isAbortError({ name: "AbortError" })).toBe(true);
    });

    it("returns false for null and primitives", { timeout: 5000 }, () => {
        expect(isAbortError(null)).toBe(false);
        expect(isAbortError("x")).toBe(false);
        expect(isAbortError(42)).toBe(false);
    });

    it("returns false for Errors with a different name", {
        timeout: 5000,
    }, () => {
        expect(isAbortError(new Error("boom"))).toBe(false);
    });
});