// Plugin Sdk Surface Report tests cover plugin sdk surface report script behavior.
import { spawnSync } from "node:child_process";
import { readFileSync } from "node:fs";
import { describe, expect, it } from "vitest";

function runSurfaceReport(env: Record<string, string>) {
  return spawnSync(process.execPath, ["scripts/plugin-sdk-surface-report.mjs", "--check"], {
    cwd: process.cwd(),
    encoding: "utf8",
    env: {
      ...process.env,
      ...env,
    },
  });
}

function readCurrentPublicFunctionExportCount() {
  const result = runSurfaceReport({});
  expect(result.status).toBe(0);
  expect(result.stderr).toBe("");

  return parseCurrentPublicCounts(result.stdout).functionExports;
}

function parseCurrentPublicCounts(stdout: string) {
  const match = /public package SDK entrypoints:[\s\S]*?\n  exports: (\d+)\n  callable exports: (\d+)/u
    .exec(stdout);
  if (match === null || match[1] === undefined || match[2] === undefined) {
    throw new Error("failed to read current public export counts");
  }
  return {
    exports: Number(match[1]),
    functionExports: Number(match[2]),
  };
}

function readDefaultBudget(envName: string): number {
  const source = readFileSync("scripts/plugin-sdk-surface-report.mjs", "utf8");
  const match = new RegExp(
    `readBudgetEnv\\("${envName}",\\s*(\\d+)\\)`,
    "u",
  );
  const result = match.exec(source);
  if (result === null || result[1] === undefined) {
    throw new Error(`failed to read default budget for ${envName}`);
  }
  return Number(result[1]);
}

describe("plugin SDK surface report", () => {
  it("rejects unknown CLI options before collecting SDK stats", () => {
    const result = spawnSync(
      process.execPath,
      ["scripts/plugin-sdk-surface-report.mjs", "--chekc"],
      {
        cwd: process.cwd(),
        encoding: "utf8",
      },
    );

    expect(result.status).toBe(1);
    expect(result.stdout).toBe("");
    expect(result.stderr.trim()).toBe("Unknown plugin SDK surface report option: --chekc");
    expect(result.stderr).not.toContain("at ");
  });

  it("prints help before collecting SDK stats", () => {
    const result = spawnSync(
      process.execPath,
      ["scripts/plugin-sdk-surface-report.mjs", "--help"],
      {
        cwd: process.cwd(),
        encoding: "utf8",
      },
    );

    expect(result.status).toBe(0);
    expect(result.stdout).toContain("Usage: node scripts/plugin-sdk-surface-report.mjs");
    expect(result.stderr).toBe("");
    expect(result.stdout).not.toContain("all SDK entrypoints:");
  });

  it("rejects loose numeric budget env vars before collecting SDK stats", () => {
    const result = runSurfaceReport({
      OPENCLAW_PLUGIN_SDK_MAX_PUBLIC_EXPORTS: "1e9",
    });

    expect(result.status).toBe(1);
    expect(result.stdout).toBe("");
    expect(result.stderr).toContain(
      "OPENCLAW_PLUGIN_SDK_MAX_PUBLIC_EXPORTS must be a non-negative integer",
    );
    expect(result.stderr).not.toContain("at ");
  });

  it("rejects unsafe budget env vars before collecting SDK stats", () => {
    const result = runSurfaceReport({
      OPENCLAW_PLUGIN_SDK_MAX_PUBLIC_EXPORTS: "9007199254740992",
    });

    expect(result.status).toBe(1);
    expect(result.stdout).toBe("");
    expect(result.stderr).toContain(
      "OPENCLAW_PLUGIN_SDK_MAX_PUBLIC_EXPORTS must be a safe non-negative integer",
    );
    expect(result.stderr).not.toContain("at ");
  });

  it("accepts exact deprecated export budget overrides by public entrypoint", () => {
    const result = runSurfaceReport({
      OPENCLAW_PLUGIN_SDK_MAX_PUBLIC_DEPRECATED_EXPORTS_BY_ENTRYPOINT: JSON.stringify({ core: 2 }),
    });

    expect(result.status).toBe(0);
    expect(result.stderr).toBe("");
  });

  it("keeps default public budgets tight to the current source surface", () => {
    const result = runSurfaceReport({});
    expect(result.status).toBe(0);
    expect(result.stderr).toBe("");

    const counts = parseCurrentPublicCounts(result.stdout);
    expect(readDefaultBudget("OPENCLAW_PLUGIN_SDK_MAX_PUBLIC_EXPORTS")).toBe(counts.exports);
    expect(readDefaultBudget("OPENCLAW_PLUGIN_SDK_MAX_PUBLIC_FUNCTION_EXPORTS")).toBe(
      counts.functionExports,
    );
  });

  it("keeps generated package declarations out of source surface counts", () => {
    const budget = readCurrentPublicFunctionExportCount();
    const result = runSurfaceReport({
      OPENCLAW_PLUGIN_SDK_MAX_PUBLIC_FUNCTION_EXPORTS: String(budget - 1),
    });

    expect(result.status).toBe(1);
    expect(result.stderr).toContain(`public callable exports ${budget} > ${budget - 1}`);
  });

  it("rejects deprecated export growth by public entrypoint", () => {
    const result = runSurfaceReport({
      OPENCLAW_PLUGIN_SDK_MAX_PUBLIC_DEPRECATED_EXPORTS_BY_ENTRYPOINT: JSON.stringify({ core: 1 }),
    });

    expect(result.status).toBe(1);
    expect(result.stderr).toContain("public deprecated exports in core 2 > 1");
  });
});