import { access, chmod, mkdir, readFile, writeFile } from "node:fs/promises";
import { delimiter, join } from "node:path";

import { expect } from "vitest";

import { createTestTempDirectory } from "../../fixtures/temporaryDirectory.js";
import { cliTest } from "../../support/cli/cliFixture.js";

cliTest.skipIf(!["darwin", "linux"].includes(process.platform))(
  "reports invalid Hopper startup timeouts without launching the discovered engine",
  async ({ cli }) => {
    const home = await createTestTempDirectory("rea-doctor-hopper-timeout-");
    const launcher = join(home, "hopper");
    const marker = join(home, "launched");
    await writeFile(launcher, `#!/bin/sh\nprintf launched > '${marker}'\n`);
    await chmod(launcher, 0o700);

    for (const [timeout, expectedExit] of [
      ["0", 1],
      ["120000", 0],
    ] as const) {
      const environment = {
        ...(process.platform === "linux"
          ? {
              // Keep the foreign launcher unsupported without reaching the
              // release network. This qualifies timeout diagnostics only.
              NODE_OPTIONS: `--import=${new URL("../../fixtures/hopperRejectionFeed.mjs", import.meta.url).href}`,
            }
          : {}),
        HOME: home,
        HOPPER_LAUNCHER_PATH: launcher,
        REA_HOPPER_STARTUP_TIMEOUT_MS: timeout,
        GHIDRA_INSTALL_DIR: join(home, "missing-ghidra"),
      };
      const providers = await cli.run({
        arguments: ["providers", "--json"],
        environment,
      });
      expect(providers.exitCode).toBe(expectedExit);
      const doctor = await cli.run({
        arguments: ["doctor", "--provider", "hopper", "--json"],
        environment,
      });
      // Linux independently rejects this shell fixture as a Hopper build.
      const healthy = process.platform === "darwin" && expectedExit === 0;
      expect(doctor.exitCode).toBe(healthy ? 0 : 1);
      expect(doctor.json).toMatchObject({
        healthy,
        scope_checks: expect.arrayContaining([
          expect.objectContaining({
            name: "hopper-startup-timeout",
            ok: expectedExit === 0,
            classification: expectedExit === 0 ? "healthy" : "config_drift",
            detail: expect.stringContaining("REA_HOPPER_STARTUP_TIMEOUT_MS"),
          }),
        ]),
      });
    }
    await expect(access(marker)).rejects.toMatchObject({ code: "ENOENT" });
  },
);

cliTest.skipIf(!["darwin", "linux"].includes(process.platform))(
  "reports native configuration that blocks the selected engine",
  async ({ cli }) => {
    const home = await createTestTempDirectory("rea-doctor-native-config-");
    const shared = {
      HOME: home,
      USERPROFILE: home,
      GHIDRA_INSTALL_DIR: join(home, "missing-ghidra"),
      HOPPER_LAUNCHER_PATH: join(home, "missing-hopper"),
    };
    const invalid = await cli.run({
      arguments: ["doctor", "--provider", "hopper", "--json"],
      environment: {
        ...shared,
        REA_ANALYSIS_PROVIDER: "Hopper",
        REA_GHIDRA_STARTUP_TIMEOUT_MS: "abc",
      },
    });
    expect(invalid.exitCode, invalid.stderr).toBe(1);
    expect(invalid.json).toMatchObject({
      healthy: false,
      scope_checks: expect.arrayContaining([
        expect.objectContaining({
          name: "runtime-configuration:REA_ANALYSIS_PROVIDER",
          ok: false,
          classification: "config_drift",
        }),
        expect.objectContaining({
          name: "runtime-configuration:REA_GHIDRA_STARTUP_TIMEOUT_MS",
          ok: false,
          classification: "config_drift",
        }),
      ]),
    });

    const jebOnly = await cli.run({
      arguments: ["doctor", "--provider", "hopper", "--json"],
      environment: { ...shared, REA_JEB_MCP_TIMEOUT_MS: "abc" },
    });
    const checks = (jebOnly.json as { checks?: { name: string }[] } | undefined)
      ?.checks;
    expect(
      checks?.some((check) => check.name.startsWith("runtime-configuration:")),
    ).toBe(false);
  },
);

cliTest(
  "reports MCP startup failures for a selected client",
  async ({ cli }) => {
    const doctor = await cli.run({
      arguments: ["--json", "doctor", "--client", "codex"],
      environment: { REA_GHIDRA_STARTUP_TIMEOUT_MS: "abc" },
    });
    expect(doctor.exitCode, doctor.stderr).toBe(1);
    expect(doctor.stderr).toBe("");
    expect(doctor.json).toMatchObject({
      healthy: false,
      scope: { mode: "explicit", clients: ["codex"], providers: [] },
      scope_checks: expect.arrayContaining([
        expect.objectContaining({
          name: "runtime-configuration:REA_GHIDRA_STARTUP_TIMEOUT_MS",
          ok: false,
        }),
      ]),
    });
  },
);

cliTest.skipIf(!["darwin", "linux"].includes(process.platform))(
  "retains a configured Hopper path in host diagnostics without launching it",
  async ({ cli }) => {
    const home = await createTestTempDirectory("rea-doctor-hopper-home-");
    const launcher = `${home}/bin/../bin/hopper`;
    const launchMarker = join(home, "hopper-was-launched");
    await mkdir(join(home, "bin"), { recursive: true });
    await writeFile(
      launcher,
      '#!/bin/sh\nprintf launched > "$REA_HOPPER_TEST_MARKER"\nexit 99\n',
    );
    await chmod(launcher, 0o700);
    const loaderMarker = join(home, "loader-checked-launcher");
    if (process.platform === "linux") {
      // A shell fixture needs controlled loader diagnostics on Linux. This
      // checks discovery and path preservation, not actual Hopper compatibility.
      const loader = join(home, "bin", "ldd");
      await writeFile(
        loader,
        [
          "#!/bin/sh",
          'test "$#" -eq 1 || exit 87',
          'test "$1" = "$HOPPER_LAUNCHER_PATH" || exit 88',
          'printf "%s" "$1" > "$REA_HOPPER_LDD_TEST_MARKER"',
          'printf "%s\\n" "libc.so.6 => /fixture/libc.so.6 (0x1)"',
          "",
        ].join("\n"),
      );
      await chmod(loader, 0o700);
    }

    const result = await cli.run({
      arguments: ["doctor", "--provider", "hopper", "--json"],
      cwd: home,
      environment: {
        ...(process.platform === "linux"
          ? {
              PATH: [join(home, "bin"), process.env.PATH ?? ""].join(delimiter),
              REA_HOPPER_LDD_TEST_MARKER: loaderMarker,
              NODE_OPTIONS: `--import=${new URL("../../fixtures/hopperRejectionFeed.mjs", import.meta.url).href}`,
            }
          : {}),
        HOME: home,
        USERPROFILE: home,
        HOPPER_LAUNCHER_PATH: launcher,
        REA_HOPPER_TEST_MARKER: launchMarker,
        GHIDRA_INSTALL_DIR: join(home, "missing-ghidra"),
      },
      timeoutMs: 20_000,
    });

    const hopperReady = process.platform === "darwin";
    expect(result.signal).toBeNull();
    expect(result.exitCode).toBe(hopperReady ? 0 : 1);
    expect(result.json).toMatchObject({
      healthy: hopperReady,
      environment_healthy: false,
      hopperPath: launcher,
      checks: expect.arrayContaining([
        expect.objectContaining({
          name: "hopper",
          ok: true,
          detail: launcher,
          classification: "healthy",
        }),
        ...(process.platform === "linux"
          ? [
              expect.objectContaining({
                name: "hopper-version",
                ok: false,
                detail: launcher,
                classification: "config_drift",
                remediation: expect.stringContaining("HOPPER_LAUNCHER_PATH"),
              }),
            ]
          : []),
      ]),
    });
    await expect(access(launchMarker)).rejects.toMatchObject({
      code: "ENOENT",
    });
    if (process.platform === "linux")
      expect(await readFile(loaderMarker, "utf8")).toBe(launcher);
  },
);