import crypto from "node:crypto";
import { shouldLogVerbose } from "../../globals.js";
import {
  resolveEventSessionKeyForPolicy,
  resolveEventSessionRoutingPolicy,
  scopedHeartbeatWakeOptionsForPolicy,
} from "../../infra/event-session-routing.js";
import { createModelCallStreamProgressReporter } from "../../logging/diagnostic-model-stream-progress.js";
import { beginDiagnosticBackendActivity } from "../../logging/diagnostic-run-activity.js";
import type { CliBackendConfig } from "../../plugins/cli-backend.types.js";
import { appendCapturedOutput, createCapturedOutputBuffers } from "../../process/exec-output.js";
import type { RunExit } from "../../process/supervisor/types.js";
import type { CliOutput, CliTerminalInterruption } from "../cli-output-contracts.js";
import { createCliJsonlStreamingParser } from "../cli-output-stream.js";
import { parseCliOutput } from "../cli-output.js";
import type { FailoverError } from "../failover-error.js";
import { applyPluginTextReplacements } from "../plugin-text-transforms.js";
import type { CliExecuteDeps } from "./execute-deps.js";
import type { CliEventHandlers } from "./execute-events.js";
import { createCliAbortError, executeNodeClaudeRun } from "./execute-node-claude.js";
import { appendCliOutputTail } from "./execute-output-buffer.js";
import { executePluginOwnedProcess } from "./execute-plugin.js";
import type { CliToolTracking } from "./execute-tool-tracking.js";
import {
  createCliExitFailoverError,
  createCliFailoverError,
  resolveCliResumeAtError,
} from "./exit-error.js";
import { buildCliSupervisorScopeKey } from "./helpers.js";
import { cliBackendLog, formatCliBackendOutputDigest } from "./log.js";
import type { createClaudeCliModelCallDiagnostics } from "./model-call-diagnostics.js";
import {
  createCliTimeoutError,
  resolveCliNoOutputTimeoutDecision,
} from "./no-output-timeout-policy.js";
import { createCliOutputFailoverError } from "./output-error.js";
import type { NodeClaudePlacement, PreparedCliRunContext } from "./types.js";

const CLI_RUNNER_OUTPUT_PARSE_BYTES = 1024 * 1024;

type ExecuteCliProcessOptions = {
  onPhase?: (phase: "send" | "resolve" | "cleanup") => void;
};

export async function executeCliProcess(params: {
  context: PreparedCliRunContext;
  assertCurrent: () => void;
  backend: CliBackendConfig;
  deps: CliExecuteDeps;
  events: CliEventHandlers;
  toolTracking: CliToolTracking;
  diagnostics: ReturnType<typeof createClaudeCliModelCallDiagnostics>;
  nodePlacement: NodeClaudePlacement | null;
  nodeSystemPrompt?: string;
  nodeEnv?: Record<string, string>;
  nodeClearEnv?: string[];
  useManagedClaudeLiveSession: boolean;
  initialGatewayCaptureKey?: string;
  useResume: boolean;
  cliSessionIdToUse?: string;
  resolvedSessionId?: string;
  executionCommand: string;
  executionArgv0?: string;
  executionLeadingArgv: readonly string[];
  resolveExecutionArgs: () => string[];
  env: Record<string, string>;
  prompt: string;
  promptContext?: PreparedCliRunContext["promptContext"];
  argsPrompt?: string;
  stdin?: string;
  noOutputTimeoutMs: number;
  outputMode: CliBackendConfig["output"];
  logOutputText: boolean;
  cliTurnStartedAt: number;
  observeForkSuccessor: (sessionId: string) => void;
  options?: ExecuteCliProcessOptions;
}): Promise<CliOutput> {
  const context = params.context;
  const runParams = context.params;
  const failoverContext = {
    provider: runParams.provider,
    model: context.modelId,
    sessionId: runParams.sessionId,
    lane: runParams.lane,
  };
  const outputErrorContext = { ...failoverContext, runId: runParams.runId };
  // buildCliArgs emits this option only for an actual checkpointed resume.
  const resumeAtArg =
    params.useResume && runParams.cliSessionResumeAt ? params.backend.resumeAtArg : undefined;
  const hasJsonlOutput = params.outputMode === "jsonl";

  const streamingParser = hasJsonlOutput
    ? createCliJsonlStreamingParser({
        backend: params.backend,
        providerId: context.backendResolved.id,
        parseJsonlEvent: context.backendResolved.parseJsonlEvent,
        parseJsonlLifecycleEvent: context.backendResolved.parseJsonlLifecycleEvent,
        onAssistantDelta: params.events.emitCliAssistantDelta,
        onThinkingDelta: params.events.emitCliThinkingDelta,
        onThinkingProgress: params.events.emitCliThinkingProgress,
        onCompaction: params.events.emitCliCompaction,
        onToolUseStart: params.events.emitParsedToolUseStart,
        onToolResult: params.events.emitParsedToolResult,
        onDisplayToolUseStart: params.events.emitCliDisplayToolUseStart,
        onDisplayToolResult: params.events.emitCliDisplayToolResult,
        onCommentaryText:
          params.events.emitLiveEvents && runParams.emitCommentaryText
            ? params.events.emitCliCommentaryText
            : undefined,
        onSessionId: params.observeForkSuccessor,
        onNativeTools: context.preparedBackend.mcpClientGrantCapture?.captureNativeTools,
        onAssistantMessage: params.diagnostics?.observeAssistantMessage,
        onUsage: params.diagnostics?.observeUsage,
      })
    : null;
  let stdoutTail = "";
  const stdoutCapture = createCapturedOutputBuffers();
  let stdoutBytes = 0;
  const stdoutHash = crypto.createHash("sha256");
  let stderrTail = "";
  const stderrCapture = createCapturedOutputBuffers();
  let stderrBytes = 0;
  const stderrHash = crypto.createHash("sha256");
  // Only the core lifecycle owner may publish recovery facts. Plugin records
  // carry output, never the authority or deadline used to protect its execution.
  const reportStreamProgress = createModelCallStreamProgressReporter(
    () => backendActivity?.observeOutput(true) ?? false,
  );
  const streamProgressTarget = {
    runId: runParams.runId,
    ...(runParams.sessionKey ? { sessionKey: runParams.sessionKey } : {}),
    ...(runParams.sessionId ? { sessionId: runParams.sessionId } : {}),
  };
  const consumeStdout = (chunk: string) => {
    const chunkBytes = Buffer.byteLength(chunk);
    params.diagnostics?.observeCliOutput(chunk, "stdout", chunkBytes);
    if (chunkBytes > 0) {
      if (params.events.activeParsedToolCount() === 0) {
        reportStreamProgress(streamProgressTarget);
      } else {
        // Tool chatter renews the transport's quiet allowance, not the separate
        // blocked-tool progress clock.
        backendActivity?.observeOutput(false);
      }
    }
    stdoutBytes += chunkBytes;
    stdoutHash.update(chunk);
    stdoutTail = appendCliOutputTail(stdoutTail, chunk);
    if (chunk && stdoutCapture.truncatedBytes === 0) {
      appendCapturedOutput(stdoutCapture, chunk, CLI_RUNNER_OUTPUT_PARSE_BYTES, "head");
    }
    streamingParser?.push(chunk);
  };
  const consumeStderr = (chunk: string) => {
    params.diagnostics?.observeCliOutput(chunk, "stderr");
    stderrBytes += Buffer.byteLength(chunk);
    stderrHash.update(chunk);
    stderrTail = appendCliOutputTail(stderrTail, chunk);
    if (chunk && stderrCapture.truncatedBytes === 0) {
      appendCapturedOutput(stderrCapture, chunk, CLI_RUNNER_OUTPUT_PARSE_BYTES, "head");
    }
  };

  runParams.onExecutionPhase?.({
    phase: "process_spawned",
    provider: runParams.provider,
    model: context.modelId,
    backend: context.backendResolved.id,
  });
  let managedRunPid: number | undefined;
  let nodeRunAbortSignal: AbortSignal | undefined;
  let nodeRunTruncated = false;
  const pluginTimeout: { error?: FailoverError } = {};
  let terminalInterruption: CliTerminalInterruption | undefined;
  let result: RunExit;
  runParams.assertCurrent?.();
  params.diagnostics?.observeRequestPayload(params.stdin ?? params.argsPrompt ?? "");
  params.assertCurrent();
  const backendActivity = runParams.diagnosticOwner
    ? beginDiagnosticBackendActivity({
        owner: runParams.diagnosticOwner,
        noOutputTimeoutMs: params.noOutputTimeoutMs,
        assertCurrent: params.assertCurrent,
      })
    : undefined;
  try {
    if (params.nodePlacement) {
      const nodeRun = await executeNodeClaudeRun({
        context,
        nodePlacement: params.nodePlacement,
        executionArgs: params.resolveExecutionArgs(),
        stdinPayload: params.stdin ?? "",
        ...(params.nodeSystemPrompt !== undefined
          ? { nodeSystemPrompt: params.nodeSystemPrompt }
          : {}),
        ...(params.nodeEnv ? { nodeEnv: params.nodeEnv } : {}),
        ...(params.nodeClearEnv ? { nodeClearEnv: params.nodeClearEnv } : {}),
        noOutputTimeoutMs: params.noOutputTimeoutMs,
        consumeStdout,
        consumeStderr,
        deps: params.deps,
      });
      result = nodeRun.result;
      nodeRunAbortSignal = nodeRun.nodeRunAbortSignal;
      nodeRunTruncated = nodeRun.nodeRunTruncated;
    } else if (context.executionTarget.kind === "plugin") {
      result = await executePluginOwnedProcess({
        context,
        execute: context.executionTarget.execute,
        executionCommand: params.executionCommand,
        executionArgv0: params.executionArgv0,
        executionArgs: [...params.executionLeadingArgv, ...params.resolveExecutionArgs()],
        env: params.env,
        prompt: params.prompt,
        ...(params.promptContext ? { promptContext: params.promptContext } : {}),
        useResume: params.useResume,
        forceNewSession:
          params.cliSessionIdToUse === undefined && context.openClawHistoryPrompt !== undefined,
        sessionId: params.resolvedSessionId,
        noOutputTimeoutMs: params.noOutputTimeoutMs,
        consumeStdout,
        onOutstandingWorkChange: backendActivity?.setOutstandingWork,
        activeToolCount: params.events.activeParsedToolCount,
        getActiveLoopbackAskUserDeadline: params.toolTracking.getActiveLoopbackAskUserDeadline,
        onActiveLoopbackAskUserDeadlineChange:
          params.toolTracking.onActiveLoopbackAskUserDeadlineChange,
        onNoOutputTimeout: (error) => {
          pluginTimeout.error = error;
        },
        onInterrupted: (reason) => {
          streamingParser?.finish();
          const partialOutput = streamingParser?.getOutput();
          if (
            !partialOutput?.text.trim() ||
            partialOutput.errorText ||
            partialOutput.terminalFailure
          ) {
            return false;
          }
          terminalInterruption = { reason };
          return true;
        },
        mcpCapture: {
          captureKey: params.initialGatewayCaptureKey,
          beginCapture: params.toolTracking.beginGatewayCapture,
        },
        ...(params.useManagedClaudeLiveSession
          ? {
              liveSession: {
                requiredGeneration: params.cliSessionIdToUse
                  ? context.requiredClaudeLiveSessionGeneration
                  : undefined,
              },
            }
          : {}),
      }).catch((error: unknown) => {
        runParams.assertCurrent?.();
        if (runParams.abortSignal?.aborted || params.events.hasObservedCliActivity()) {
          throw error;
        }
        throw resolveCliResumeAtError(error, resumeAtArg, failoverContext) ?? error;
      });
    } else {
      const supervisor = params.deps.getProcessSupervisor();
      const scopeKey = buildCliSupervisorScopeKey({
        backend: params.backend,
        backendId: context.backendResolved.id,
        cliSessionId: params.useResume ? params.resolvedSessionId : undefined,
      });
      if (runParams.abortSignal?.aborted) {
        throw createCliAbortError();
      }
      // Startup can wait behind another scoped run. Reserve cancellation under
      // the caller's run id before awaiting the child or replacement fence.
      let processCancelled = false;
      const assertProcessCurrent = () => {
        params.assertCurrent();
        if (processCancelled) {
          throw new Error("CLI process authority is no longer active");
        }
      };
      const abortManagedRun = () => {
        processCancelled = true;
        supervisor.cancel(runParams.runId, "manual-cancel");
      };
      runParams.abortSignal?.addEventListener("abort", abortManagedRun, { once: true });
      try {
        params.toolTracking.beginGatewayCapture(
          params.initialGatewayCaptureKey,
          assertProcessCurrent,
        );
        const managedRun = await supervisor.spawn({
          assertCurrent: params.assertCurrent,
          runId: runParams.runId,
          scopeKey,
          replaceExistingScope: Boolean(params.useResume && scopeKey),
          mode: "child",
          argv: [params.executionCommand, ...params.executionLeadingArgv],
          resolveArgs: params.resolveExecutionArgs,
          argv0: params.executionArgv0,
          timeoutMs: runParams.timeoutMs,
          noOutputTimeoutMs: params.noOutputTimeoutMs,
          onCancel: () => {
            processCancelled = true;
          },
          cwd: context.cwd ?? context.workspaceDir,
          env: params.env,
          input: params.stdin ?? "",
          secretInput: context.preparedBackend.secretInput,
          captureOutput: false,
          onStdout: consumeStdout,
          onStderr: consumeStderr,
        });
        managedRunPid = managedRun.pid;
        const replyBackendHandle = runParams.replyOperation
          ? {
              kind: "cli" as const,
              runId: runParams.runId,
              toolAuthorityFingerprint: runParams.toolAuthorityFingerprint,
              cancel: () => {
                processCancelled = true;
                managedRun.cancel("manual-cancel");
              },
            }
          : undefined;
        if (replyBackendHandle) {
          runParams.replyOperation?.attachBackend(replyBackendHandle);
        }
        try {
          result = await managedRun.wait();
          processCancelled ||= result.reason !== "exit";
        } finally {
          if (replyBackendHandle) {
            runParams.replyOperation?.detachBackend(replyBackendHandle);
          }
        }
      } finally {
        runParams.abortSignal?.removeEventListener("abort", abortManagedRun);
      }
    }
  } finally {
    backendActivity?.close();
  }
  if (
    (runParams.abortSignal?.aborted || nodeRunAbortSignal?.aborted) &&
    result.reason === "manual-cancel" &&
    !terminalInterruption
  ) {
    throw createCliAbortError();
  }
  params.options?.onPhase?.("resolve");
  streamingParser?.finish();
  const streamingParserErrorText =
    params.outputMode === "jsonl" ? (streamingParser?.getErrorText() ?? null) : null;
  if (streamingParserErrorText) {
    throw createCliFailoverError(streamingParserErrorText, "format", failoverContext);
  }
  // The node re-injects the terminal result after truncation. If even that is
  // missing, the turn outcome is unknowable and cannot pass as a clean exit.
  if (
    nodeRunTruncated &&
    result.exitCode === 0 &&
    !result.timedOut &&
    !streamingParser?.hasTerminalResult()
  ) {
    throw createCliFailoverError(
      "paired node truncated the Claude CLI stream before the terminal result; refusing to accept partial output.",
      "format",
      failoverContext,
    );
  }

  let stdout: string | undefined;
  // Preserve replacement characters when the byte limit clips a UTF-8 sequence.
  const readStdout = () =>
    (stdout ??= Buffer.concat(stdoutCapture.chunks, stdoutCapture.bytes).toString("utf8").trim());
  const stdoutDiagnostic = stdoutTail.trim();
  const stderrDiagnostic = stderrTail.trim();
  const processDiagnostics = {
    backendId: context.backendResolved.id,
    processReason: result.reason,
    exitCode: result.exitCode,
    exitSignal: result.exitSignal,
    durationMs: result.durationMs,
    stdoutBytes,
    stdoutHash: stdoutHash.digest("hex").slice(0, 12),
    stderrBytes,
    stderrHash: stderrHash.digest("hex").slice(0, 12),
    useResume: params.useResume,
  };
  if (params.logOutputText) {
    if (stdoutDiagnostic) {
      cliBackendLog.info(`cli stdout:\n${stdoutDiagnostic}`);
    }
    if (stderrDiagnostic) {
      cliBackendLog.info(`cli stderr:\n${stderrDiagnostic}`);
    }
  }
  if (shouldLogVerbose()) {
    if (stdoutDiagnostic) {
      cliBackendLog.debug(`cli stdout:\n${stdoutDiagnostic}`);
    }
    if (stderrDiagnostic) {
      cliBackendLog.debug(`cli stderr:\n${stderrDiagnostic}`);
    }
  }

  const streamedJsonlOutput =
    params.outputMode === "jsonl" ? (streamingParser?.getOutput() ?? null) : null;
  const parsedStructuredOutput =
    streamedJsonlOutput ??
    (params.outputMode === "json" && stdoutCapture.truncatedBytes === 0
      ? parseCliOutput({
          raw: readStdout(),
          backend: params.backend,
          providerId: context.backendResolved.id,
          outputMode: params.outputMode,
          fallbackSessionId: params.resolvedSessionId,
        })
      : null);
  // A completed terminal record is authoritative even if the CLI hangs
  // afterward. Reclassifying it as a timeout could replay completed tools.
  if (parsedStructuredOutput?.terminalFailure) {
    const terminalError = createCliOutputFailoverError({
      output: parsedStructuredOutput,
      ...outputErrorContext,
    });
    if (terminalError) {
      throw terminalError;
    }
  }

  if (!terminalInterruption && (result.exitCode !== 0 || result.reason !== "exit")) {
    params.options?.onPhase?.("send");
    if (result.reason === "no-output-timeout" || result.noOutputTimedOut) {
      const timeoutSeconds = Math.round(params.noOutputTimeoutMs / 1000);
      cliBackendLog.warn(
        `cli watchdog timeout: provider=${runParams.provider} model=${context.modelId} session=${params.resolvedSessionId ?? runParams.sessionId} noOutputTimeoutMs=${params.noOutputTimeoutMs} pid=${managedRunPid ?? "node"}`,
      );
      const observedActivity = params.events.hasObservedCliActivity();
      const timeoutDecision = pluginTimeout.error
        ? { error: pluginTimeout.error }
        : resolveCliNoOutputTimeoutDecision({
            context: failoverContext,
            timeoutMs: params.noOutputTimeoutMs,
            quietDurationMs: params.noOutputTimeoutMs,
            cliTimeout: {
              mode: "no-output",
              timeoutSeconds,
              observedActivity,
              activeToolCount: params.events.activeParsedToolCount(),
              backgroundTaskCount: 0,
            },
            hasOutputText: Boolean(stdoutDiagnostic || stderrDiagnostic),
            useResume: params.useResume,
            hasReplayUnsafeActivity: observedActivity,
          });
      const retryable = timeoutDecision.error.code === "cli_no_output_timeout";
      const deferNotice =
        retryable &&
        Boolean(params.cliSessionIdToUse) &&
        Boolean(params.resolvedSessionId) &&
        Boolean(context.openClawHistoryPrompt) &&
        Boolean(runParams.sessionKey) &&
        runParams.timeoutMs - (Date.now() - context.started) > 0;
      if (runParams.sessionKey && params.events.emitLiveEvents && !deferNotice) {
        const stallNotice = [
          `CLI agent (${runParams.provider}) produced no output for ${timeoutSeconds}s and was terminated.`,
          "It may have been waiting for interactive input or an approval prompt.",
          "Check CLI permission settings and OpenClaw approval prompts.",
        ].join(" ");
        const routing = resolveEventSessionRoutingPolicy({
          cfg: runParams.config,
          sessionKey: runParams.sessionKey,
          channel: runParams.messageProvider,
          accountId: runParams.agentAccountId,
        });
        params.deps.enqueueSystemEvent(stallNotice, {
          sessionKey: resolveEventSessionKeyForPolicy(runParams.sessionKey, routing),
        });
        params.deps.requestHeartbeat(
          scopedHeartbeatWakeOptionsForPolicy(
            runParams.sessionKey,
            { source: "cli-watchdog", intent: "event", reason: "cli:watchdog:stall" },
            routing,
          ),
        );
      }
      throw timeoutDecision.error;
    }
    if (result.reason === "overall-timeout") {
      const timeoutSeconds = Math.round(runParams.timeoutMs / 1000);
      throw createCliTimeoutError(
        failoverContext,
        {
          mode: "overall",
          timeoutSeconds,
          observedActivity: params.events.hasObservedCliActivity(),
          activeToolCount: params.events.activeParsedToolCount(),
          backgroundTaskCount: 0,
        },
        "cli_overall_timeout",
      );
    }
    const retryEmptyFailure = result.reason === "exit" && !params.events.hasObservedCliActivity();
    const stderr = Buffer.concat(stderrCapture.chunks, stderrCapture.bytes).toString("utf8").trim();
    throw createCliExitFailoverError({
      context: failoverContext,
      candidates: [stderr, readStdout(), stderrDiagnostic, stdoutDiagnostic],
      fallbackMessage: "CLI failed.",
      retryEmptyFailure,
      resumeAtArg: retryEmptyFailure ? resumeAtArg : undefined,
    });
  }

  if (stdoutCapture.truncatedBytes > 0 && !streamedJsonlOutput) {
    throw createCliFailoverError(
      `CLI stdout exceeded ${CLI_RUNNER_OUTPUT_PARSE_BYTES} bytes; refusing to parse truncated output.`,
      "format",
      failoverContext,
    );
  }
  if (runParams.controlOperation === "compact") {
    const manualCompaction = context.backendResolved.manualCompaction;
    if (!manualCompaction) {
      throw new Error(
        `CLI backend ${context.backendResolved.id} does not support manual compaction`,
      );
    }
    const validation = manualCompaction.validateOutput(readStdout());
    if (!validation.ok) {
      throw createCliFailoverError(validation.reason, "unknown", failoverContext);
    }
    return {
      text: "",
      rawText: "",
      diagnostics: { process: processDiagnostics },
      finalPromptText: params.prompt,
    };
  }
  const parsed =
    parsedStructuredOutput ??
    parseCliOutput({
      raw: readStdout(),
      backend: params.backend,
      providerId: context.backendResolved.id,
      outputMode: params.outputMode,
      fallbackSessionId: params.resolvedSessionId,
    });
  const parsedError = createCliOutputFailoverError({
    output: parsed,
    ...outputErrorContext,
  });
  if (parsedError) {
    throw parsedError;
  }
  const rawText = parsed.text;
  cliBackendLog.info(
    `cli turn: provider=${runParams.provider} model=${context.modelId} durationMs=${Date.now() - params.cliTurnStartedAt} ${formatCliBackendOutputDigest(rawText)}`,
  );
  return {
    ...parsed,
    ...(terminalInterruption ? { terminalInterruption } : {}),
    diagnostics: { ...parsed.diagnostics, process: processDiagnostics },
    rawText,
    finalPromptText: params.prompt,
    text: applyPluginTextReplacements(rawText, context.backendResolved.textTransforms?.output),
  };
}