import {
    existsSync,
    mkdtempSync,
    readFileSync,
    rmSync,
    statSync,
} from "node:fs";
import { tmpdir } from "node:os";
import { join } from "node:path";
import { describe, expect, it } from "@suaveplan/testing/runner";
import { SCAFFOLD_CODES, ScaffoldError } from "../../src/error-codes.js";
import { scaffold } from "../../src/generator/generator.js";
import { answersForFixture } from "../../src/prompt/prompt.js";
import { renderTree } from "../../src/templates/templates.js";

const FIXTURE_BY_DIR: Record<
    string,
    | "trusted-postgres-full"
    | "isolated-sqlite-rest-only"
    | "sandboxed-none-rest-only"
> = {
    "trusted-postgres-full": "trusted-postgres-full",
    "isolated-sqlite-rest-only": "isolated-sqlite-rest-only",
    "sandboxed-none-rest-only": "sandboxed-none-rest-only",
};

const SNAPSHOT_ROOT = join(import.meta.dirname, "snapshots");

function makeTmp(prefix: string): string {
    return mkdtempSync(join(tmpdir(), `${prefix}-`));
}

function readSnapshot(fixtureDir: string, relPath: string): string {
    return readFileSync(join(SNAPSHOT_ROOT, fixtureDir, relPath), "utf8");
}

for (const [snapshotDir, fixture] of Object.entries(FIXTURE_BY_DIR)) {
    describe(`scaffold-output: ${snapshotDir}`, () => {
        it(`${snapshotDir} snapshot match`, { timeout: 30000 }, () => {
            const files = renderTree(answersForFixture(fixture, "demo-plugin"));
            for (const f of files) {
                const expected = readSnapshot(snapshotDir, f.path);
                expect(f.content).toBe(expected);
            }
        });
    });
}

describe("scaffold-output: sandboxed-none-rest-only emits no integration / migrations", () => {
    it("directories omitted when DB is none", { timeout: 5000 }, () => {
        const files = renderTree(
            answersForFixture("sandboxed-none-rest-only", "demo-plugin")
        );
        expect(files.some((f) => f.path.startsWith("tests/integration"))).toBe(
            false
        );
        expect(files.some((f) => f.path.startsWith("migrations/"))).toBe(false);
    });
});

describe("scaffold-output: vitest configs use createTestConfig", () => {
    it("generated vitest configs use createTestConfig", {
        timeout: 5000,
    }, () => {
        const files = renderTree(
            answersForFixture("trusted-postgres-full", "demo-plugin")
        );
        const cfg = files.find((f) => f.path === "vitest.config.ts");
        expect(cfg?.content.includes("@suaveplan/testing/config")).toBe(true);
        expect(cfg?.content.includes("createTestConfig")).toBe(true);
        expect(cfg?.content.includes("baseVitestConfig")).toBe(false);
        const cfgI = files.find(
            (f) => f.path === "vitest.integration.config.ts"
        );
        expect(cfgI?.content.includes("createTestConfig")).toBe(true);
    });
});

describe("scaffold-output: postgres selection wires testing-integration-postgres", () => {
    it("postgres selection wires testing-integration-postgres", {
        timeout: 5000,
    }, () => {
        const files = renderTree(
            answersForFixture("trusted-postgres-full", "demo-plugin")
        );
        const it_ = files.find(
            (f) => f.path === "tests/integration/example.integration.test.ts"
        );
        expect(
            it_?.content.includes("@suaveplan/testing-integration-postgres")
        ).toBe(true);
        expect(it_?.content.includes("INTEGRATION")).toBe(true);
    });
});

describe("scaffold-output: pre-existing directory refuses without force", () => {
    it("pre-existing directory raises without force", { timeout: 5000 }, () => {
        const root = makeTmp("scaffold-out-exists");
        const answers = answersForFixture("sandboxed-none-rest-only", "demo");
        // First write succeeds.
        scaffold({ answers, targetDir: root, force: true });
        // Second write without --force raises.
        try {
            expect(() => scaffold({ answers, targetDir: root })).toThrowError(
                ScaffoldError
            );
            try {
                scaffold({ answers, targetDir: root });
            } catch (err) {
                expect((err as ScaffoldError).code).toBe(
                    SCAFFOLD_CODES.DIRECTORY_EXISTS
                );
            }
        } finally {
            rmSync(root, { recursive: true, force: true });
        }
    });

    it("--force overwrites prior files", { timeout: 5000 }, () => {
        const root = makeTmp("scaffold-out-force");
        const answers = answersForFixture("sandboxed-none-rest-only", "demo");
        scaffold({ answers, targetDir: root, force: true });
        scaffold({ answers, targetDir: root, force: true });
        expect(existsSync(join(root, "plugin.json"))).toBe(true);
        expect(statSync(join(root, "plugin.json")).isFile()).toBe(true);
        rmSync(root, { recursive: true, force: true });
    });
});