import { spawnSync } from "node:child_process";
import { mkdtempSync, rmSync, writeFileSync } from "node:fs";
import { join } from "node:path";
import { tmpdir } from "node:os";

type JsonRecord = Record<string, unknown>;

function assertCondition(condition: unknown, message: string, detail: unknown = {}): void {
  if (!condition) throw new Error(`${message}: ${JSON.stringify(detail)}`);
}

function runCli(args: string[], stdin?: string): { status: number | null; stdout: string; stderr: string; json: JsonRecord | null } {
  const result = spawnSync("bun", ["scripts/cli.ts", ...args], {
    cwd: process.cwd(),
    input: stdin,
    encoding: "utf8",
  });
  const stdout = String(result.stdout || "");
  let json: JsonRecord | null = null;
  try {
    json = JSON.parse(stdout) as JsonRecord;
  } catch {
    json = null;
  }
  return {
    status: result.status,
    stdout,
    stderr: String(result.stderr || ""),
    json,
  };
}

function nestedRecord(value: unknown, path: string[]): JsonRecord {
  let current: unknown = value;
  for (const key of path) {
    assertCondition(current !== null && typeof current === "object" && !Array.isArray(current), "expected object while traversing JSON", { path, key, current });
    current = (current as JsonRecord)[key];
  }
  assertCondition(current !== null && typeof current === "object" && !Array.isArray(current), "expected nested object", { path, current });
  return current as JsonRecord;
}

function stringArray(value: unknown): string[] {
  return Array.isArray(value) ? value.map((item) => String(item)) : [];
}

function assertDryRunPrompt(response: JsonRecord, expectedText: string): void {
  assertCondition(response.ok === true, "submit dry-run should succeed", response);
  const data = nestedRecord(response.data, []);
  assertCondition(data.dryRun === true, "submit dry-run should expose dryRun=true", data);
  const request = nestedRecord(response.data, ["request"]);
  const prompt = nestedRecord(request, ["prompt"]);
  assertCondition(prompt.text === expectedText, "submit dry-run prompt text mismatch", prompt);
  assertCondition(prompt.chars === expectedText.length, "submit dry-run prompt char count mismatch", prompt);
  assertCondition(prompt.truncated === false, "submit dry-run prompt must expose the full prompt", prompt);
}

export function runCodeQueueCliSubmitPromptContract(): JsonRecord {
  const multilinePrompt = [
    "Goal: verify stdin prompt path",
    "JSON: {\"quote\":\"'single' and \\\"double\\\"\"}",
    "Markdown: `code` | table | value",
    "Backslash: C:\\tmp\\prompt",
    "",
  ].join("\n");

  const stdin = runCli(["codex", "submit", "--prompt-stdin", "--queue", "prompt-contract", "--dry-run"], multilinePrompt);
  assertDryRunPrompt(stdin.json ?? {}, multilinePrompt);
  assertCondition(String(stdin.json?.command || "") === "codex submit --prompt-stdin --queue prompt-contract --dry-run", "stdin command should list flags without echoing prompt", stdin.json ?? {});

  const tmp = mkdtempSync(join(tmpdir(), "unidesk-code-queue-submit-"));
  const promptFile = join(tmp, "prompt.md");
  const filePrompt = `${multilinePrompt}file prompt tail\n`;
  writeFileSync(promptFile, filePrompt, "utf8");
  try {
    const fromFile = runCli(["codex", "submit", "--prompt-file", promptFile, "--queue", "prompt-contract", "--dry-run"]);
    assertDryRunPrompt(fromFile.json ?? {}, filePrompt);
    assertCondition(String(fromFile.json?.command || "").includes(`--prompt-file ${promptFile}`), "prompt-file command should retain file path for review", fromFile.json ?? {});
    assertCondition(!String(fromFile.json?.command || "").includes("file prompt tail"), "prompt-file command must not echo file prompt text", fromFile.json ?? {});
  } finally {
    rmSync(tmp, { recursive: true, force: true });
  }

  const positional = runCli(["codex", "submit", "short smoke prompt", "--dry-run"]);
  assertDryRunPrompt(positional.json ?? {}, "short smoke prompt");
  assertCondition(String(positional.json?.command || "").includes("<prompt:redacted>"), "outer command should redact positional submit prompt", positional.json ?? {});
  assertCondition(!String(positional.json?.command || "").includes("short smoke prompt"), "outer command must not echo positional submit prompt", positional.json ?? {});

  const duplicateSource = runCli(["codex", "submit", "positional", "--prompt-stdin", "--dry-run"], "stdin\n");
  assertCondition(duplicateSource.status !== 0, "duplicate prompt source should fail", duplicateSource.json ?? { stdout: duplicateSource.stdout });
  const duplicateMessage = String(nestedRecord(duplicateSource.json, ["error"]).message || "");
  assertCondition(duplicateMessage.includes("exactly one prompt source"), "duplicate prompt source error should be explicit", { duplicateMessage });

  const help = runCli(["codex", "submit", "--help"]);
  assertCondition(help.status === 0 && help.json?.ok === true, "codex submit help should succeed", help.json ?? { stdout: help.stdout });
  const data = nestedRecord(help.json?.data, []);
  const usage = stringArray(data.usage);
  const promptInput = nestedRecord(data, ["promptInput"]);
  const recommended = stringArray(promptInput.recommended);
  const examples = nestedRecord(data, ["examples"]);
  assertCondition(usage.some((line) => line.includes("--prompt-stdin")), "help usage should include --prompt-stdin", { usage });
  assertCondition(usage.some((line) => line.includes("--prompt-file")), "help usage should include --prompt-file", { usage });
  assertCondition(usage.some((line) => line.includes("cat <<'PROMPT'")), "help usage should include a quoted heredoc example", { usage });
  assertCondition(recommended.includes("--prompt-stdin") && recommended.includes("--prompt-file"), "help should recommend stdin and file prompt sources", promptInput);
  assertCondition(String(promptInput.sourceRule || "").includes("Exactly one prompt source"), "help should document exact prompt source rule", promptInput);
  assertCondition(stringArray(examples.stdin).some((line) => line.includes("--prompt-stdin")), "help examples should include stdin command", examples);
  assertCondition(String(examples.file || "").includes("--prompt-file"), "help examples should include file command", examples);

  return {
    ok: true,
    checks: [
      "submit --prompt-stdin preserves multiline quotes and newlines",
      "submit --prompt-file preserves reviewed file contents",
      "submit positional prompt is redacted from the outer command envelope",
      "duplicate submit prompt source fails explicitly",
      "codex submit help documents stdin/file recommendations and copyable examples",
    ],
  };
}

if (import.meta.main) {
  process.stdout.write(`${JSON.stringify(runCodeQueueCliSubmitPromptContract(), null, 2)}\n`);
}