// The Docker build context is load-bearing in two directions, and both
// failures are silent.
//
// Excluding too little: a worktree left under `.claude/` is copied into the
// image, vitest globs its `test/` tree as well as the real one, and the
// containerised `make check` runs the whole suite twice over while reporting
// success. A compiled `bin/quak` is ~100 MB of context nobody needs.
//
// Excluding too much: Prettier 3 reads `.gitignore` as a default ignore file,
// so dropping it from the context silently changes which files
// `make fmt-check` looks at inside the image compared to the host.
//
// Neither shows up as a build failure, so they are asserted here.
import { describe, expect, it } from "vitest";
import { existsSync, readFileSync } from "node:fs";
import { fileURLToPath } from "node:url";
import { join } from "node:path";

const repoRoot = fileURLToPath(new URL("../../", import.meta.url));

const patterns = (name: string): string[] =>
    readFileSync(join(repoRoot, name), "utf-8")
        .split("\n")
        .map((line) => line.trim())
        .filter((line) => line !== "" && !line.startsWith("#"));

const dockerignore = patterns(".dockerignore");

describe(".dockerignore", () => {
    // Everything here is either generated, enormous, or secret. `.claude/` is
    // the correctness one: see the header comment and issue #25.
    it.each([
        ".claude/",
        ".quak/",
        "bin/quak",
        "node_modules",
        "coverage",
        "dist",
        ".vitest-cache/",
        ".nyc_output/",
        "*.tsbuildinfo",
    ])("keeps %s out of the build context", (pattern) => {
        expect(dockerignore).toContain(pattern);
    });

    it("leaves .gitignore in the build context for prettier", () => {
        expect(dockerignore).not.toContain(".gitignore");
    });

    // Both images are built from this same context, and the lint image runs
    // eslint and prettier across it. BuildKit lets a `<dockerfile>.dockerignore`
    // shadow the root one for a single build; such a file would silently give
    // the lint build a different, unreviewed context — and eslint's flat config
    // does not ignore dot-directories, so a stray `.claude/` worktree would be
    // linted.
    it.each(["Dockerfile", "Dockerfile.lint"])(
        "is not shadowed by a per-Dockerfile ignore file for %s",
        (name) => {
            expect(existsSync(join(repoRoot, `${name}.dockerignore`))).toBe(
                false,
            );
        },
    );
});