import { afterEach, describe, expect, it } from "vitest";
import { mkdirSync, mkdtempSync, readFileSync, rmSync, writeFileSync } from "node:fs";
import { tmpdir } from "node:os";
import { dirname, join } from "node:path";
import { spawnSync } from "node:child_process";
import { fileURLToPath } from "node:url";

const releaseNotesScript = fileURLToPath(new URL("./release-notes.mjs", import.meta.url));
const versionBumpScript =
    process.env.VERSION_BUMP_SCRIPT || fileURLToPath(new URL("../version-bump.mjs", import.meta.url));
const workspaceUpdateScript = fileURLToPath(new URL("../update-workspaces.mjs", import.meta.url));
const temporaryDirectories: string[] = [];

afterEach(() => {
    for (const directory of temporaryDirectories.splice(0)) {
        rmSync(directory, { recursive: true, force: true });
    }
});

function makeTemporaryDirectory(): string {
    const directory = mkdtempSync(join(tmpdir(), "livesync-release-notes-"));
    temporaryDirectories.push(directory);
    return directory;
}

function writeJson(directory: string, path: string, value: unknown): void {
    const fullPath = join(directory, path);
    mkdirSync(dirname(fullPath), { recursive: true });
    writeFileSync(fullPath, `${JSON.stringify(value, null, 4)}\n`, "utf8");
}

function runNode(script: string, args: string[], cwd: string, env: Record<string, string> = {}) {
    return spawnSync(process.execPath, [script, ...args], {
        cwd,
        encoding: "utf8",
        env: { ...process.env, ...env },
    });
}

function createReleaseFixture(version = "0.25.81"): string {
    const directory = makeTemporaryDirectory();
    writeJson(directory, "package.json", { version });
    writeJson(directory, "manifest.json", { version, minAppVersion: "1.7.2" });
    writeJson(directory, "versions.json", { [version]: "1.7.2" });
    for (const workspace of ["cli", "webpeer", "webapp"]) {
        writeJson(directory, `src/apps/${workspace}/package.json`, { version: `${version}-${workspace}` });
    }
    writeFileSync(
        join(directory, "updates.md"),
        "# 0.25\n\n## Unreleased\n\n### Fixed\n\n- Preserved file content.\n\n## 0.25.80\n\n7th July, 2026\n\n- Previous release.\n",
        "utf8"
    );
    return directory;
}

describe("release notes", () => {
    it("moves Unreleased notes into a dated release and validates the result", () => {
        const directory = createReleaseFixture();

        const prepared = runNode(releaseNotesScript, ["prepare", "0.25.81"], directory, {
            RELEASE_DATE: "14th July, 2026",
        });

        expect(prepared.status, prepared.stderr).toBe(0);
        expect(readFileSync(join(directory, "updates.md"), "utf8")).toBe(
            "# 0.25\n\n## Unreleased\n\n## 0.25.81\n\n14th July, 2026\n\n### Fixed\n\n- Preserved file content.\n\n## 0.25.80\n\n7th July, 2026\n\n- Previous release.\n"
        );

        const validated = runNode(releaseNotesScript, ["validate", "0.25.81"], directory);
        expect(validated.status, validated.stderr).toBe(0);
    });

    it("rejects an empty Unreleased section unless explicitly allowed", () => {
        const directory = createReleaseFixture();
        writeFileSync(
            join(directory, "updates.md"),
            "# 0.25\n\n## Unreleased\n\n## 0.25.80\n\nPrevious release.\n",
            "utf8"
        );

        const rejected = runNode(releaseNotesScript, ["prepare", "0.25.81"], directory);
        expect(rejected.status).toBe(1);
        expect(rejected.stderr).toContain("The '## Unreleased' section is empty.");

        const allowed = runNode(releaseNotesScript, ["prepare", "0.25.81"], directory, {
            ALLOW_EMPTY_UPDATES: "true",
            RELEASE_DATE: "14th July, 2026",
        });
        expect(allowed.status, allowed.stderr).toBe(0);
    });

    it("rejects unfinished release notes", () => {
        const directory = createReleaseFixture();
        writeFileSync(
            join(directory, "updates.md"),
            "# 0.25\n\n## Unreleased\n\n## 0.25.81\n\n14th July, 2026\n\n- TODO: finish these notes.\n",
            "utf8"
        );

        const result = runNode(releaseNotesScript, ["validate", "0.25.81"], directory);
        expect(result.status).toBe(1);
        expect(result.stderr).toContain("still contain TODO or WIP markers");
    });
});

describe("version bump", () => {
    it("records every release even when its minimum app version is already used", () => {
        const directory = makeTemporaryDirectory();
        writeJson(directory, "manifest.json", { version: "0.25.80", minAppVersion: "1.7.2" });
        writeJson(directory, "versions.json", { "0.25.61": "1.7.2" });

        const result = runNode(versionBumpScript, [], directory, { npm_package_version: "0.25.81" });

        expect(result.status, result.stderr).toBe(0);
        expect(JSON.parse(readFileSync(join(directory, "manifest.json"), "utf8"))).toMatchObject({
            version: "0.25.81",
            minAppVersion: "1.7.2",
        });
        expect(JSON.parse(readFileSync(join(directory, "versions.json"), "utf8"))).toEqual({
            "0.25.61": "1.7.2",
            "0.25.81": "1.7.2",
        });
    });
});

describe("workspace version update", () => {
    it("keeps workspace package and lockfile versions together", () => {
        const directory = makeTemporaryDirectory();
        const workspaces = ["src/apps/cli", "src/apps/webpeer", "src/apps/webapp"];
        writeJson(directory, "package.json", { version: "0.25.81", workspaces });
        for (const workspace of ["cli", "webpeer", "webapp"]) {
            writeJson(directory, `src/apps/${workspace}/package.json`, { version: `0.25.80-${workspace}` });
        }
        writeJson(directory, "package-lock.json", {
            name: "obsidian-livesync",
            version: "0.25.80",
            lockfileVersion: 3,
            packages: {
                "": { version: "0.25.80", workspaces },
                "src/apps/cli": { version: "0.25.80-cli" },
                "src/apps/webpeer": { version: "0.25.80-webpeer" },
                "src/apps/webapp": { version: "0.25.80-webapp" },
            },
        });

        const result = runNode(workspaceUpdateScript, [], directory);

        expect(result.status, result.stderr).toBe(0);
        for (const workspace of ["cli", "webpeer", "webapp"]) {
            const packageJson = JSON.parse(readFileSync(join(directory, `src/apps/${workspace}/package.json`), "utf8"));
            expect(packageJson.version).toBe(`0.25.81-${workspace}`);
        }
        const packageLock = JSON.parse(readFileSync(join(directory, "package-lock.json"), "utf8"));
        expect(packageLock.version).toBe("0.25.81");
        expect(packageLock.packages[""].version).toBe("0.25.81");
        expect(packageLock.packages["src/apps/cli"].version).toBe("0.25.81-cli");
        expect(packageLock.packages["src/apps/webpeer"].version).toBe("0.25.81-webpeer");
        expect(packageLock.packages["src/apps/webapp"].version).toBe("0.25.81-webapp");
    });
});