import crypto from "node:crypto";
import fs from "node:fs/promises";
import os from "node:os";
import path from "node:path";
import type { AgentTool } from "@mariozechner/pi-agent-core";
import type { ImageContent } from "@mariozechner/pi-ai";
import type { ThinkLevel } from "../../auto-reply/thinking.js";
import type { OpenClawConfig } from "../../config/config.js";
import type { CliBackendConfig } from "../../config/types.js";
import { buildTtsSystemPromptHint } from "../../tts/tts.js";
import { isRecord } from "../../utils.js";
import { buildModelAliasLines } from "../model-alias-lines.js";
import { resolveDefaultModelForAgent } from "../model-selection.js";
import { resolveOwnerDisplaySetting } from "../owner-display.js";
import type { EmbeddedContextFile } from "../pi-embedded-helpers.js";
import { detectRuntimeShell } from "../shell-utils.js";
import { buildSystemPromptParams } from "../system-prompt-params.js";
import { buildAgentSystemPrompt } from "../system-prompt.js";
export { buildCliSupervisorScopeKey, resolveCliNoOutputTimeoutMs } from "./reliability.js";

const CLI_RUN_QUEUE = new Map<string, Promise<unknown>>();
export function enqueueCliRun<T>(key: string, task: () => Promise<T>): Promise<T> {
  const prior = CLI_RUN_QUEUE.get(key) ?? Promise.resolve();
  const chained = prior.catch(() => undefined).then(task);
  // Keep queue continuity even when a run rejects, without emitting unhandled rejections.
  const tracked = chained
    .catch(() => undefined)
    .finally(() => {
      if (CLI_RUN_QUEUE.get(key) === tracked) {
        CLI_RUN_QUEUE.delete(key);
      }
    });
  CLI_RUN_QUEUE.set(key, tracked);
  return chained;
}

type CliUsage = {
  input?: number;
  output?: number;
  cacheRead?: number;
  cacheWrite?: number;
  total?: number;
};

export type CliOutput = {
  text: string;
  sessionId?: string;
  usage?: CliUsage;
};

export function buildSystemPrompt(params: {
  workspaceDir: string;
  config?: OpenClawConfig;
  defaultThinkLevel?: ThinkLevel;
  extraSystemPrompt?: string;
  ownerNumbers?: string[];
  heartbeatPrompt?: string;
  docsPath?: string;
  tools: AgentTool[];
  contextFiles?: EmbeddedContextFile[];
  modelDisplay: string;
  agentId?: string;
}) {
  const defaultModelRef = resolveDefaultModelForAgent({
    cfg: params.config ?? {},
    agentId: params.agentId,
  });
  const defaultModelLabel = `${defaultModelRef.provider}/${defaultModelRef.model}`;
  const { runtimeInfo, userTimezone, userTime, userTimeFormat } = buildSystemPromptParams({
    config: params.config,
    agentId: params.agentId,
    workspaceDir: params.workspaceDir,
    cwd: process.cwd(),
    runtime: {
      host: "openclaw",
      os: `${os.type()} ${os.release()}`,
      arch: os.arch(),
      node: process.version,
      model: params.modelDisplay,
      defaultModel: defaultModelLabel,
      shell: detectRuntimeShell(),
    },
  });
  const ttsHint = params.config ? buildTtsSystemPromptHint(params.config) : undefined;
  const ownerDisplay = resolveOwnerDisplaySetting(params.config);
  return buildAgentSystemPrompt({
    workspaceDir: params.workspaceDir,
    defaultThinkLevel: params.defaultThinkLevel,
    extraSystemPrompt: params.extraSystemPrompt,
    ownerNumbers: params.ownerNumbers,
    ownerDisplay: ownerDisplay.ownerDisplay,
    ownerDisplaySecret: ownerDisplay.ownerDisplaySecret,
    reasoningTagHint: false,
    heartbeatPrompt: params.heartbeatPrompt,
    docsPath: params.docsPath,
    runtimeInfo,
    toolNames: params.tools.map((tool) => tool.name),
    modelAliasLines: buildModelAliasLines(params.config),
    userTimezone,
    userTime,
    userTimeFormat,
    contextFiles: params.contextFiles,
    ttsHint,
    memoryCitationsMode: params.config?.memory?.citations,
  });
}

export function normalizeCliModel(modelId: string, backend: CliBackendConfig): string {
  const trimmed = modelId.trim();
  if (!trimmed) {
    return trimmed;
  }
  const direct = backend.modelAliases?.[trimmed];
  if (direct) {
    return direct;
  }
  const lower = trimmed.toLowerCase();
  const mapped = backend.modelAliases?.[lower];
  if (mapped) {
    return mapped;
  }
  return trimmed;
}

function toUsage(raw: Record<string, unknown>): CliUsage | undefined {
  const pick = (key: string) =>
    typeof raw[key] === "number" && raw[key] > 0 ? raw[key] : undefined;
  const input = pick("input_tokens") ?? pick("inputTokens");
  const output = pick("output_tokens") ?? pick("outputTokens");
  const cacheRead =
    pick("cache_read_input_tokens") ?? pick("cached_input_tokens") ?? pick("cacheRead");
  const cacheWrite = pick("cache_write_input_tokens") ?? pick("cacheWrite");
  const total = pick("total_tokens") ?? pick("total");
  if (!input && !output && !cacheRead && !cacheWrite && !total) {
    return undefined;
  }
  return { input, output, cacheRead, cacheWrite, total };
}

function collectText(value: unknown): string {
  if (!value) {
    return "";
  }
  if (typeof value === "string") {
    return value;
  }
  if (Array.isArray(value)) {
    return value.map((entry) => collectText(entry)).join("");
  }
  if (!isRecord(value)) {
    return "";
  }
  if (typeof value.text === "string") {
    return value.text;
  }
  if (typeof value.content === "string") {
    return value.content;
  }
  if (Array.isArray(value.content)) {
    return value.content.map((entry) => collectText(entry)).join("");
  }
  if (isRecord(value.message)) {
    return collectText(value.message);
  }
  return "";
}

function pickSessionId(
  parsed: Record<string, unknown>,
  backend: CliBackendConfig,
): string | undefined {
  const fields = backend.sessionIdFields ?? [
    "session_id",
    "sessionId",
    "conversation_id",
    "conversationId",
  ];
  for (const field of fields) {
    const value = parsed[field];
    if (typeof value === "string" && value.trim()) {
      return value.trim();
    }
  }
  return undefined;
}

export function parseCliJson(raw: string, backend: CliBackendConfig): CliOutput | null {
  const trimmed = raw.trim();
  if (!trimmed) {
    return null;
  }
  let parsed: unknown;
  try {
    parsed = JSON.parse(trimmed);
  } catch {
    return null;
  }
  if (!isRecord(parsed)) {
    return null;
  }
  const sessionId = pickSessionId(parsed, backend);
  const usage = isRecord(parsed.usage) ? toUsage(parsed.usage) : undefined;
  const text =
    collectText(parsed.message) ||
    collectText(parsed.content) ||
    collectText(parsed.result) ||
    collectText(parsed);
  return { text: text.trim(), sessionId, usage };
}

export function parseCliJsonl(raw: string, backend: CliBackendConfig): CliOutput | null {
  const lines = raw
    .split(/\r?\n/g)
    .map((line) => line.trim())
    .filter(Boolean);
  if (lines.length === 0) {
    return null;
  }
  let sessionId: string | undefined;
  let usage: CliUsage | undefined;
  const texts: string[] = [];
  for (const line of lines) {
    let parsed: unknown;
    try {
      parsed = JSON.parse(line);
    } catch {
      continue;
    }
    if (!isRecord(parsed)) {
      continue;
    }
    if (!sessionId) {
      sessionId = pickSessionId(parsed, backend);
    }
    if (!sessionId && typeof parsed.thread_id === "string") {
      sessionId = parsed.thread_id.trim();
    }
    if (isRecord(parsed.usage)) {
      usage = toUsage(parsed.usage) ?? usage;
    }
    const item = isRecord(parsed.item) ? parsed.item : null;
    if (item && typeof item.text === "string") {
      const type = typeof item.type === "string" ? item.type.toLowerCase() : "";
      if (!type || type.includes("message")) {
        texts.push(item.text);
      }
    }
  }
  const text = texts.join("\n").trim();
  if (!text) {
    return null;
  }
  return { text, sessionId, usage };
}

export function resolveSystemPromptUsage(params: {
  backend: CliBackendConfig;
  isNewSession: boolean;
  systemPrompt?: string;
}): string | null {
  const systemPrompt = params.systemPrompt?.trim();
  if (!systemPrompt) {
    return null;
  }
  const when = params.backend.systemPromptWhen ?? "first";
  if (when === "never") {
    return null;
  }
  if (when === "first" && !params.isNewSession) {
    return null;
  }
  if (!params.backend.systemPromptArg?.trim()) {
    return null;
  }
  return systemPrompt;
}

export function resolveSessionIdToSend(params: {
  backend: CliBackendConfig;
  cliSessionId?: string;
}): { sessionId?: string; isNew: boolean } {
  const mode = params.backend.sessionMode ?? "always";
  const existing = params.cliSessionId?.trim();
  if (mode === "none") {
    return { sessionId: undefined, isNew: !existing };
  }
  if (mode === "existing") {
    return { sessionId: existing, isNew: !existing };
  }
  if (existing) {
    return { sessionId: existing, isNew: false };
  }
  return { sessionId: crypto.randomUUID(), isNew: true };
}

export function resolvePromptInput(params: { backend: CliBackendConfig; prompt: string }): {
  argsPrompt?: string;
  stdin?: string;
} {
  const inputMode = params.backend.input ?? "arg";
  if (inputMode === "stdin") {
    return { stdin: params.prompt };
  }
  if (params.backend.maxPromptArgChars && params.prompt.length > params.backend.maxPromptArgChars) {
    return { stdin: params.prompt };
  }
  return { argsPrompt: params.prompt };
}

function resolveImageExtension(mimeType: string): string {
  const normalized = mimeType.toLowerCase();
  if (normalized.includes("png")) {
    return "png";
  }
  if (normalized.includes("jpeg") || normalized.includes("jpg")) {
    return "jpg";
  }
  if (normalized.includes("gif")) {
    return "gif";
  }
  if (normalized.includes("webp")) {
    return "webp";
  }
  return "bin";
}

export function appendImagePathsToPrompt(prompt: string, paths: string[]): string {
  if (!paths.length) {
    return prompt;
  }
  const trimmed = prompt.trimEnd();
  const separator = trimmed ? "\n\n" : "";
  return `${trimmed}${separator}${paths.join("\n")}`;
}

export async function writeCliImages(
  images: ImageContent[],
): Promise<{ paths: string[]; cleanup: () => Promise<void> }> {
  const tempDir = await fs.mkdtemp(path.join(os.tmpdir(), "openclaw-cli-images-"));
  const paths: string[] = [];
  for (let i = 0; i < images.length; i += 1) {
    const image = images[i];
    const ext = resolveImageExtension(image.mimeType);
    const filePath = path.join(tempDir, `image-${i + 1}.${ext}`);
    const buffer = Buffer.from(image.data, "base64");
    await fs.writeFile(filePath, buffer, { mode: 0o600 });
    paths.push(filePath);
  }
  const cleanup = async () => {
    await fs.rm(tempDir, { recursive: true, force: true });
  };
  return { paths, cleanup };
}

export function buildCliArgs(params: {
  backend: CliBackendConfig;
  baseArgs: string[];
  modelId: string;
  sessionId?: string;
  systemPrompt?: string | null;
  imagePaths?: string[];
  promptArg?: string;
  useResume: boolean;
}): string[] {
  const args: string[] = [...params.baseArgs];
  if (!params.useResume && params.backend.modelArg && params.modelId) {
    args.push(params.backend.modelArg, params.modelId);
  }
  if (!params.useResume && params.systemPrompt && params.backend.systemPromptArg) {
    args.push(params.backend.systemPromptArg, params.systemPrompt);
  }
  if (!params.useResume && params.sessionId) {
    if (params.backend.sessionArgs && params.backend.sessionArgs.length > 0) {
      for (const entry of params.backend.sessionArgs) {
        args.push(entry.replaceAll("{sessionId}", params.sessionId));
      }
    } else if (params.backend.sessionArg) {
      args.push(params.backend.sessionArg, params.sessionId);
    }
  }
  if (params.imagePaths && params.imagePaths.length > 0) {
    const mode = params.backend.imageMode ?? "repeat";
    const imageArg = params.backend.imageArg;
    if (imageArg) {
      if (mode === "list") {
        args.push(imageArg, params.imagePaths.join(","));
      } else {
        for (const imagePath of params.imagePaths) {
          args.push(imageArg, imagePath);
        }
      }
    }
  }
  if (params.promptArg !== undefined) {
    args.push(params.promptArg);
  }
  return args;
}
