import { spawn, type ChildProcess } from "node:child_process";
import { and, asc, desc, eq, gt, inArray, sql } from "drizzle-orm";
import type { Db } from "@paperclip/db";
import {
  agents,
  agentRuntimeState,
  agentWakeupRequests,
  heartbeatRunEvents,
  heartbeatRuns,
  costEvents,
} from "@paperclip/db";
import { conflict, notFound } from "../errors.js";
import { logger } from "../middleware/logger.js";
import { publishLiveEvent } from "./live-events.js";
import { getRunLogStore, type RunLogHandle } from "./run-log-store.js";

interface RunningProcess {
  child: ChildProcess;
  graceSec: number;
}

interface RunProcessResult {
  exitCode: number | null;
  signal: string | null;
  timedOut: boolean;
  stdout: string;
  stderr: string;
}

interface UsageSummary {
  inputTokens: number;
  outputTokens: number;
  cachedInputTokens?: number;
}

interface AdapterExecutionResult {
  exitCode: number | null;
  signal: string | null;
  timedOut: boolean;
  errorMessage?: string | null;
  usage?: UsageSummary;
  sessionId?: string | null;
  provider?: string | null;
  model?: string | null;
  costUsd?: number | null;
  resultJson?: Record<string, unknown> | null;
  summary?: string | null;
}

interface WakeupOptions {
  source?: "timer" | "assignment" | "on_demand" | "automation";
  triggerDetail?: "manual" | "ping" | "callback" | "system";
  reason?: string | null;
  payload?: Record<string, unknown> | null;
  idempotencyKey?: string | null;
  requestedByActorType?: "user" | "agent" | "system";
  requestedByActorId?: string | null;
  contextSnapshot?: Record<string, unknown>;
}

const runningProcesses = new Map<string, RunningProcess>();
const MAX_CAPTURE_BYTES = 4 * 1024 * 1024;
const MAX_EXCERPT_BYTES = 32 * 1024;
const MAX_LIVE_LOG_CHUNK_BYTES = 8 * 1024;

function parseObject(value: unknown): Record<string, unknown> {
  if (typeof value !== "object" || value === null || Array.isArray(value)) {
    return {};
  }
  return value as Record<string, unknown>;
}

function asString(value: unknown, fallback: string): string {
  return typeof value === "string" && value.length > 0 ? value : fallback;
}

function asNumber(value: unknown, fallback: number): number {
  return typeof value === "number" && Number.isFinite(value) ? value : fallback;
}

function asBoolean(value: unknown, fallback: boolean): boolean {
  return typeof value === "boolean" ? value : fallback;
}

function asStringArray(value: unknown): string[] {
  return Array.isArray(value) ? value.filter((item): item is string => typeof item === "string") : [];
}

function parseJson(value: string): Record<string, unknown> | null {
  try {
    return JSON.parse(value) as Record<string, unknown>;
  } catch {
    return null;
  }
}

function appendWithCap(prev: string, chunk: string, cap = MAX_CAPTURE_BYTES) {
  const combined = prev + chunk;
  return combined.length > cap ? combined.slice(combined.length - cap) : combined;
}

function appendExcerpt(prev: string, chunk: string) {
  return appendWithCap(prev, chunk, MAX_EXCERPT_BYTES);
}

function resolvePathValue(obj: Record<string, unknown>, dottedPath: string) {
  const parts = dottedPath.split(".");
  let cursor: unknown = obj;

  for (const part of parts) {
    if (typeof cursor !== "object" || cursor === null || Array.isArray(cursor)) {
      return "";
    }
    cursor = (cursor as Record<string, unknown>)[part];
  }

  if (cursor === null || cursor === undefined) return "";
  if (typeof cursor === "string") return cursor;
  if (typeof cursor === "number" || typeof cursor === "boolean") return String(cursor);

  try {
    return JSON.stringify(cursor);
  } catch {
    return "";
  }
}

function renderTemplate(template: string, data: Record<string, unknown>) {
  return template.replace(/{{\s*([a-zA-Z0-9_.-]+)\s*}}/g, (_, path) => resolvePathValue(data, path));
}

function parseCodexJsonl(stdout: string) {
  let sessionId: string | null = null;
  const messages: string[] = [];
  const usage = {
    inputTokens: 0,
    cachedInputTokens: 0,
    outputTokens: 0,
  };

  for (const rawLine of stdout.split(/\r?\n/)) {
    const line = rawLine.trim();
    if (!line) continue;

    const event = parseJson(line);
    if (!event) continue;

    const type = asString(event.type, "");
    if (type === "thread.started") {
      sessionId = asString(event.thread_id, sessionId ?? "") || sessionId;
      continue;
    }

    if (type === "item.completed") {
      const item = parseObject(event.item);
      if (asString(item.type, "") === "agent_message") {
        const text = asString(item.text, "");
        if (text) messages.push(text);
      }
      continue;
    }

    if (type === "turn.completed") {
      const usageObj = parseObject(event.usage);
      usage.inputTokens = asNumber(usageObj.input_tokens, usage.inputTokens);
      usage.cachedInputTokens = asNumber(usageObj.cached_input_tokens, usage.cachedInputTokens);
      usage.outputTokens = asNumber(usageObj.output_tokens, usage.outputTokens);
    }
  }

  return {
    sessionId,
    summary: messages.join("\n\n").trim(),
    usage,
  };
}

async function runChildProcess(
  runId: string,
  command: string,
  args: string[],
  opts: {
    cwd: string;
    env: Record<string, string>;
    timeoutSec: number;
    graceSec: number;
    onLog: (stream: "stdout" | "stderr", chunk: string) => Promise<void>;
  },
): Promise<RunProcessResult> {
  return new Promise<RunProcessResult>((resolve, reject) => {
    const child = spawn(command, args, {
      cwd: opts.cwd,
      env: { ...process.env, ...opts.env },
      shell: false,
      stdio: ["ignore", "pipe", "pipe"],
    });

    runningProcesses.set(runId, { child, graceSec: opts.graceSec });

    let timedOut = false;
    let stdout = "";
    let stderr = "";
    let logChain: Promise<void> = Promise.resolve();

    const timeout = setTimeout(() => {
      timedOut = true;
      child.kill("SIGTERM");
      setTimeout(() => {
        if (!child.killed) {
          child.kill("SIGKILL");
        }
      }, Math.max(1, opts.graceSec) * 1000);
    }, Math.max(1, opts.timeoutSec) * 1000);

    child.stdout?.on("data", (chunk) => {
      const text = String(chunk);
      stdout = appendWithCap(stdout, text);
      logChain = logChain
        .then(() => opts.onLog("stdout", text))
        .catch((err) => logger.warn({ err, runId }, "failed to append stdout log chunk"));
    });

    child.stderr?.on("data", (chunk) => {
      const text = String(chunk);
      stderr = appendWithCap(stderr, text);
      logChain = logChain
        .then(() => opts.onLog("stderr", text))
        .catch((err) => logger.warn({ err, runId }, "failed to append stderr log chunk"));
    });

    child.on("error", (err) => {
      clearTimeout(timeout);
      runningProcesses.delete(runId);
      reject(err);
    });

    child.on("close", (code, signal) => {
      clearTimeout(timeout);
      runningProcesses.delete(runId);
      void logChain.finally(() => {
        resolve({
          exitCode: code,
          signal,
          timedOut,
          stdout,
          stderr,
        });
      });
    });
  });
}

export function heartbeatService(db: Db) {
  const runLogStore = getRunLogStore();

  async function getAgent(agentId: string) {
    return db
      .select()
      .from(agents)
      .where(eq(agents.id, agentId))
      .then((rows) => rows[0] ?? null);
  }

  async function getRun(runId: string) {
    return db
      .select()
      .from(heartbeatRuns)
      .where(eq(heartbeatRuns.id, runId))
      .then((rows) => rows[0] ?? null);
  }

  async function getRuntimeState(agentId: string) {
    return db
      .select()
      .from(agentRuntimeState)
      .where(eq(agentRuntimeState.agentId, agentId))
      .then((rows) => rows[0] ?? null);
  }

  async function ensureRuntimeState(agent: typeof agents.$inferSelect) {
    const existing = await getRuntimeState(agent.id);
    if (existing) return existing;

    return db
      .insert(agentRuntimeState)
      .values({
        agentId: agent.id,
        companyId: agent.companyId,
        adapterType: agent.adapterType,
        stateJson: {},
      })
      .returning()
      .then((rows) => rows[0]);
  }

  async function setRunStatus(
    runId: string,
    status: string,
    patch?: Partial<typeof heartbeatRuns.$inferInsert>,
  ) {
    const updated = await db
      .update(heartbeatRuns)
      .set({ status, ...patch, updatedAt: new Date() })
      .where(eq(heartbeatRuns.id, runId))
      .returning()
      .then((rows) => rows[0] ?? null);

    if (updated) {
      publishLiveEvent({
        companyId: updated.companyId,
        type: "heartbeat.run.status",
        payload: {
          runId: updated.id,
          agentId: updated.agentId,
          status: updated.status,
          invocationSource: updated.invocationSource,
          triggerDetail: updated.triggerDetail,
          error: updated.error ?? null,
          errorCode: updated.errorCode ?? null,
          startedAt: updated.startedAt ? new Date(updated.startedAt).toISOString() : null,
          finishedAt: updated.finishedAt ? new Date(updated.finishedAt).toISOString() : null,
        },
      });
    }

    return updated;
  }

  async function setWakeupStatus(
    wakeupRequestId: string | null | undefined,
    status: string,
    patch?: Partial<typeof agentWakeupRequests.$inferInsert>,
  ) {
    if (!wakeupRequestId) return;
    await db
      .update(agentWakeupRequests)
      .set({ status, ...patch, updatedAt: new Date() })
      .where(eq(agentWakeupRequests.id, wakeupRequestId));
  }

  async function appendRunEvent(
    run: typeof heartbeatRuns.$inferSelect,
    seq: number,
    event: {
      eventType: string;
      stream?: "system" | "stdout" | "stderr";
      level?: "info" | "warn" | "error";
      color?: string;
      message?: string;
      payload?: Record<string, unknown>;
    },
  ) {
    await db.insert(heartbeatRunEvents).values({
      companyId: run.companyId,
      runId: run.id,
      agentId: run.agentId,
      seq,
      eventType: event.eventType,
      stream: event.stream,
      level: event.level,
      color: event.color,
      message: event.message,
      payload: event.payload,
    });

    publishLiveEvent({
      companyId: run.companyId,
      type: "heartbeat.run.event",
      payload: {
        runId: run.id,
        agentId: run.agentId,
        seq,
        eventType: event.eventType,
        stream: event.stream ?? null,
        level: event.level ?? null,
        color: event.color ?? null,
        message: event.message ?? null,
        payload: event.payload ?? null,
      },
    });
  }

  function parseHeartbeatPolicy(agent: typeof agents.$inferSelect) {
    const runtimeConfig = parseObject(agent.runtimeConfig);
    const heartbeat = parseObject(runtimeConfig.heartbeat);

    return {
      enabled: asBoolean(heartbeat.enabled, true),
      intervalSec: Math.max(0, asNumber(heartbeat.intervalSec, 0)),
      wakeOnAssignment: asBoolean(heartbeat.wakeOnAssignment, true),
      wakeOnOnDemand: asBoolean(heartbeat.wakeOnOnDemand, true),
      wakeOnAutomation: asBoolean(heartbeat.wakeOnAutomation, true),
    };
  }

  async function finalizeAgentStatus(
    agentId: string,
    outcome: "succeeded" | "failed" | "cancelled" | "timed_out",
  ) {
    const existing = await getAgent(agentId);
    if (!existing) return;

    if (existing.status === "paused" || existing.status === "terminated") {
      return;
    }

    const nextStatus =
      outcome === "succeeded" ? "idle" : outcome === "cancelled" ? "idle" : "error";

    const updated = await db
      .update(agents)
      .set({
        status: nextStatus,
        lastHeartbeatAt: new Date(),
        updatedAt: new Date(),
      })
      .where(eq(agents.id, agentId))
      .returning()
      .then((rows) => rows[0] ?? null);

    if (updated) {
      publishLiveEvent({
        companyId: updated.companyId,
        type: "agent.status",
        payload: {
          agentId: updated.id,
          status: updated.status,
          lastHeartbeatAt: updated.lastHeartbeatAt
            ? new Date(updated.lastHeartbeatAt).toISOString()
            : null,
          outcome,
        },
      });
    }
  }

  async function updateRuntimeState(
    agent: typeof agents.$inferSelect,
    run: typeof heartbeatRuns.$inferSelect,
    result: AdapterExecutionResult,
  ) {
    const existing = await ensureRuntimeState(agent);
    const usage = result.usage;
    const inputTokens = usage?.inputTokens ?? 0;
    const outputTokens = usage?.outputTokens ?? 0;
    const cachedInputTokens = usage?.cachedInputTokens ?? 0;
    const additionalCostCents = Math.max(0, Math.round((result.costUsd ?? 0) * 100));

    await db
      .update(agentRuntimeState)
      .set({
        adapterType: agent.adapterType,
        sessionId: result.sessionId ?? existing.sessionId,
        lastRunId: run.id,
        lastRunStatus: run.status,
        lastError: result.errorMessage ?? null,
        totalInputTokens: existing.totalInputTokens + inputTokens,
        totalOutputTokens: existing.totalOutputTokens + outputTokens,
        totalCachedInputTokens: existing.totalCachedInputTokens + cachedInputTokens,
        totalCostCents: existing.totalCostCents + additionalCostCents,
        updatedAt: new Date(),
      })
      .where(eq(agentRuntimeState.agentId, agent.id));

    if (additionalCostCents > 0) {
      await db.insert(costEvents).values({
        companyId: agent.companyId,
        agentId: agent.id,
        provider: result.provider ?? "unknown",
        model: result.model ?? "unknown",
        inputTokens,
        outputTokens,
        costCents: additionalCostCents,
        occurredAt: new Date(),
      });

      await db
        .update(agents)
        .set({
          spentMonthlyCents: sql`${agents.spentMonthlyCents} + ${additionalCostCents}`,
          updatedAt: new Date(),
        })
        .where(eq(agents.id, agent.id));
    }
  }

  async function executeHttpRun(
    runId: string,
    agentId: string,
    config: Record<string, unknown>,
    context: Record<string, unknown>,
  ): Promise<AdapterExecutionResult> {
    const url = asString(config.url, "");
    if (!url) throw new Error("HTTP adapter missing url");

    const method = asString(config.method, "POST");
    const timeoutMs = asNumber(config.timeoutMs, 15000);
    const headers = parseObject(config.headers) as Record<string, string>;
    const payloadTemplate = parseObject(config.payloadTemplate);
    const body = { ...payloadTemplate, agentId, runId, context };

    const controller = new AbortController();
    const timer = setTimeout(() => controller.abort(), timeoutMs);

    try {
      const res = await fetch(url, {
        method,
        headers: {
          "content-type": "application/json",
          ...headers,
        },
        body: JSON.stringify(body),
        signal: controller.signal,
      });

      if (!res.ok) {
        throw new Error(`HTTP invoke failed with status ${res.status}`);
      }

      return {
        exitCode: 0,
        signal: null,
        timedOut: false,
        summary: `HTTP ${method} ${url}`,
      };
    } finally {
      clearTimeout(timer);
    }
  }

  async function executeProcessRun(
    runId: string,
    config: Record<string, unknown>,
    onLog: (stream: "stdout" | "stderr", chunk: string) => Promise<void>,
  ): Promise<AdapterExecutionResult> {
    const command = asString(config.command, "");
    if (!command) throw new Error("Process adapter missing command");

    const args = asStringArray(config.args);
    const cwd = asString(config.cwd, process.cwd());
    const envConfig = parseObject(config.env);
    const env: Record<string, string> = {};
    for (const [k, v] of Object.entries(envConfig)) {
      if (typeof v === "string") env[k] = v;
    }

    const timeoutSec = asNumber(config.timeoutSec, 900);
    const graceSec = asNumber(config.graceSec, 15);

    const proc = await runChildProcess(runId, command, args, {
      cwd,
      env,
      timeoutSec,
      graceSec,
      onLog,
    });

    if (proc.timedOut) {
      return {
        exitCode: proc.exitCode,
        signal: proc.signal,
        timedOut: true,
        errorMessage: `Timed out after ${timeoutSec}s`,
      };
    }

    if ((proc.exitCode ?? 0) !== 0) {
      return {
        exitCode: proc.exitCode,
        signal: proc.signal,
        timedOut: false,
        errorMessage: `Process exited with code ${proc.exitCode ?? -1}`,
        resultJson: {
          stdout: proc.stdout,
          stderr: proc.stderr,
        },
      };
    }

    return {
      exitCode: proc.exitCode,
      signal: proc.signal,
      timedOut: false,
      resultJson: {
        stdout: proc.stdout,
        stderr: proc.stderr,
      },
    };
  }

  async function executeClaudeLocalRun(
    runId: string,
    agent: typeof agents.$inferSelect,
    runtime: typeof agentRuntimeState.$inferSelect,
    config: Record<string, unknown>,
    context: Record<string, unknown>,
    onLog: (stream: "stdout" | "stderr", chunk: string) => Promise<void>,
  ): Promise<AdapterExecutionResult> {
    const promptTemplate = asString(
      config.promptTemplate,
      "You are agent {{agent.id}} ({{agent.name}}). Continue your Paperclip work.",
    );
    const bootstrapTemplate = asString(config.bootstrapPromptTemplate, promptTemplate);
    const model = asString(config.model, "");
    const maxTurns = asNumber(config.maxTurnsPerRun, 0);
    const dangerouslySkipPermissions = asBoolean(config.dangerouslySkipPermissions, false);

    const cwd = asString(config.cwd, process.cwd());
    const envConfig = parseObject(config.env);
    const env: Record<string, string> = {};
    for (const [k, v] of Object.entries(envConfig)) {
      if (typeof v === "string") env[k] = v;
    }

    const timeoutSec = asNumber(config.timeoutSec, 1800);
    const graceSec = asNumber(config.graceSec, 20);
    const extraArgs = asStringArray(config.extraArgs);

    const sessionId = runtime.sessionId;
    const template = sessionId ? promptTemplate : bootstrapTemplate;
    const prompt = renderTemplate(template, {
      company: { id: agent.companyId },
      agent,
      run: { id: runId, source: "on_demand" },
      context,
    });

    const args = ["--print", prompt, "--output-format", "json"];
    if (sessionId) args.push("--resume", sessionId);
    if (dangerouslySkipPermissions) args.push("--dangerously-skip-permissions");
    if (model) args.push("--model", model);
    if (maxTurns > 0) args.push("--max-turns", String(maxTurns));
    if (extraArgs.length > 0) args.push(...extraArgs);

    const proc = await runChildProcess(runId, "claude", args, {
      cwd,
      env,
      timeoutSec,
      graceSec,
      onLog,
    });

    if (proc.timedOut) {
      return {
        exitCode: proc.exitCode,
        signal: proc.signal,
        timedOut: true,
        errorMessage: `Timed out after ${timeoutSec}s`,
      };
    }

    const parsed = parseJson(proc.stdout);
    if (!parsed) {
      return {
        exitCode: proc.exitCode,
        signal: proc.signal,
        timedOut: false,
        errorMessage:
          (proc.exitCode ?? 0) === 0
            ? "Failed to parse claude JSON output"
            : `Claude exited with code ${proc.exitCode ?? -1}`,
        resultJson: {
          stdout: proc.stdout,
          stderr: proc.stderr,
        },
      };
    }

    const usageObj = parseObject(parsed.usage);
    const usage: UsageSummary = {
      inputTokens: asNumber(usageObj.input_tokens, 0),
      cachedInputTokens: asNumber(usageObj.cache_read_input_tokens, 0),
      outputTokens: asNumber(usageObj.output_tokens, 0),
    };

    return {
      exitCode: proc.exitCode,
      signal: proc.signal,
      timedOut: false,
      errorMessage: (proc.exitCode ?? 0) === 0 ? null : `Claude exited with code ${proc.exitCode ?? -1}`,
      usage,
      sessionId: asString(parsed.session_id, runtime.sessionId ?? "") || runtime.sessionId,
      provider: "anthropic",
      model: asString(parsed.model, model),
      costUsd: asNumber(parsed.total_cost_usd, 0),
      resultJson: parsed,
      summary: asString(parsed.result, ""),
    };
  }

  async function executeCodexLocalRun(
    runId: string,
    agent: typeof agents.$inferSelect,
    runtime: typeof agentRuntimeState.$inferSelect,
    config: Record<string, unknown>,
    context: Record<string, unknown>,
    onLog: (stream: "stdout" | "stderr", chunk: string) => Promise<void>,
  ): Promise<AdapterExecutionResult> {
    const promptTemplate = asString(
      config.promptTemplate,
      "You are agent {{agent.id}} ({{agent.name}}). Continue your Paperclip work.",
    );
    const bootstrapTemplate = asString(config.bootstrapPromptTemplate, promptTemplate);
    const model = asString(config.model, "");
    const search = asBoolean(config.search, false);
    const bypass = asBoolean(config.dangerouslyBypassApprovalsAndSandbox, false);

    const cwd = asString(config.cwd, process.cwd());
    const envConfig = parseObject(config.env);
    const env: Record<string, string> = {};
    for (const [k, v] of Object.entries(envConfig)) {
      if (typeof v === "string") env[k] = v;
    }

    const timeoutSec = asNumber(config.timeoutSec, 1800);
    const graceSec = asNumber(config.graceSec, 20);
    const extraArgs = asStringArray(config.extraArgs);

    const sessionId = runtime.sessionId;
    const template = sessionId ? promptTemplate : bootstrapTemplate;
    const prompt = renderTemplate(template, {
      company: { id: agent.companyId },
      agent,
      run: { id: runId, source: "on_demand" },
      context,
    });

    const args = ["exec", "--json"];
    if (search) args.unshift("--search");
    if (bypass) args.push("--dangerously-bypass-approvals-and-sandbox");
    if (model) args.push("--model", model);
    if (extraArgs.length > 0) args.push(...extraArgs);
    if (sessionId) args.push("resume", sessionId, prompt);
    else args.push(prompt);

    const proc = await runChildProcess(runId, "codex", args, {
      cwd,
      env,
      timeoutSec,
      graceSec,
      onLog,
    });

    if (proc.timedOut) {
      return {
        exitCode: proc.exitCode,
        signal: proc.signal,
        timedOut: true,
        errorMessage: `Timed out after ${timeoutSec}s`,
      };
    }

    const parsed = parseCodexJsonl(proc.stdout);

    return {
      exitCode: proc.exitCode,
      signal: proc.signal,
      timedOut: false,
      errorMessage: (proc.exitCode ?? 0) === 0 ? null : `Codex exited with code ${proc.exitCode ?? -1}`,
      usage: parsed.usage,
      sessionId: parsed.sessionId ?? runtime.sessionId,
      provider: "openai",
      model,
      costUsd: null,
      resultJson: {
        stdout: proc.stdout,
        stderr: proc.stderr,
      },
      summary: parsed.summary,
    };
  }

  async function executeRun(runId: string) {
    const run = await getRun(runId);
    if (!run) return;
    if (run.status !== "queued" && run.status !== "running") return;

    const agent = await getAgent(run.agentId);
    if (!agent) {
      await setRunStatus(runId, "failed", {
        error: "Agent not found",
        errorCode: "agent_not_found",
        finishedAt: new Date(),
      });
      await setWakeupStatus(run.wakeupRequestId, "failed", {
        finishedAt: new Date(),
        error: "Agent not found",
      });
      return;
    }

    const runtime = await ensureRuntimeState(agent);

    let seq = 1;
    let handle: RunLogHandle | null = null;
    let stdoutExcerpt = "";
    let stderrExcerpt = "";

    try {
      await setRunStatus(runId, "running", {
        startedAt: new Date(),
        sessionIdBefore: runtime.sessionId,
      });
      await setWakeupStatus(run.wakeupRequestId, "claimed", { claimedAt: new Date() });

      const runningAgent = await db
        .update(agents)
        .set({ status: "running", updatedAt: new Date() })
        .where(eq(agents.id, agent.id))
        .returning()
        .then((rows) => rows[0] ?? null);

      if (runningAgent) {
        publishLiveEvent({
          companyId: runningAgent.companyId,
          type: "agent.status",
          payload: {
            agentId: runningAgent.id,
            status: runningAgent.status,
            outcome: "running",
          },
        });
      }

      const currentRun = (await getRun(runId)) ?? run;
      await appendRunEvent(currentRun, seq++, {
        eventType: "lifecycle",
        stream: "system",
        level: "info",
        message: "run started",
      });

      handle = await runLogStore.begin({
        companyId: run.companyId,
        agentId: run.agentId,
        runId,
      });

      await db
        .update(heartbeatRuns)
        .set({
          logStore: handle.store,
          logRef: handle.logRef,
          updatedAt: new Date(),
        })
        .where(eq(heartbeatRuns.id, runId));

      const onLog = async (stream: "stdout" | "stderr", chunk: string) => {
        if (stream === "stdout") stdoutExcerpt = appendExcerpt(stdoutExcerpt, chunk);
        if (stream === "stderr") stderrExcerpt = appendExcerpt(stderrExcerpt, chunk);

        if (handle) {
          await runLogStore.append(handle, {
            stream,
            chunk,
            ts: new Date().toISOString(),
          });
        }

        const payloadChunk =
          chunk.length > MAX_LIVE_LOG_CHUNK_BYTES
            ? chunk.slice(chunk.length - MAX_LIVE_LOG_CHUNK_BYTES)
            : chunk;

        publishLiveEvent({
          companyId: run.companyId,
          type: "heartbeat.run.log",
          payload: {
            runId: run.id,
            agentId: run.agentId,
            stream,
            chunk: payloadChunk,
            truncated: payloadChunk.length !== chunk.length,
          },
        });
      };

      const config = parseObject(agent.adapterConfig);
      const context = (run.contextSnapshot ?? {}) as Record<string, unknown>;

      let adapterResult: AdapterExecutionResult;
      if (agent.adapterType === "http") {
        adapterResult = await executeHttpRun(run.id, agent.id, config, context);
      } else if (agent.adapterType === "claude_local") {
        adapterResult = await executeClaudeLocalRun(run.id, agent, runtime, config, context, onLog);
      } else if (agent.adapterType === "codex_local") {
        adapterResult = await executeCodexLocalRun(run.id, agent, runtime, config, context, onLog);
      } else {
        adapterResult = await executeProcessRun(run.id, config, onLog);
      }

      let outcome: "succeeded" | "failed" | "cancelled" | "timed_out";
      const latestRun = await getRun(run.id);
      if (latestRun?.status === "cancelled") {
        outcome = "cancelled";
      } else if (adapterResult.timedOut) {
        outcome = "timed_out";
      } else if ((adapterResult.exitCode ?? 0) === 0 && !adapterResult.errorMessage) {
        outcome = "succeeded";
      } else {
        outcome = "failed";
      }

      let logSummary: { bytes: number; sha256?: string; compressed: boolean } | null = null;
      if (handle) {
        logSummary = await runLogStore.finalize(handle);
      }

      const status =
        outcome === "succeeded"
          ? "succeeded"
          : outcome === "cancelled"
            ? "cancelled"
            : outcome === "timed_out"
              ? "timed_out"
              : "failed";

      await setRunStatus(run.id, status, {
        finishedAt: new Date(),
        error:
          outcome === "succeeded"
            ? null
            : adapterResult.errorMessage ?? (outcome === "timed_out" ? "Timed out" : "Adapter failed"),
        errorCode:
          outcome === "timed_out"
            ? "timeout"
            : outcome === "cancelled"
              ? "cancelled"
              : outcome === "failed"
                ? "adapter_failed"
                : null,
        exitCode: adapterResult.exitCode,
        signal: adapterResult.signal,
        usageJson: (adapterResult.usage ?? null) as Record<string, unknown> | null,
        resultJson: adapterResult.resultJson ?? null,
        sessionIdAfter: adapterResult.sessionId ?? runtime.sessionId,
        stdoutExcerpt,
        stderrExcerpt,
        logBytes: logSummary?.bytes,
        logSha256: logSummary?.sha256,
        logCompressed: logSummary?.compressed ?? false,
      });

      await setWakeupStatus(run.wakeupRequestId, outcome === "succeeded" ? "completed" : status, {
        finishedAt: new Date(),
        error: adapterResult.errorMessage ?? null,
      });

      const finalizedRun = await getRun(run.id);
      if (finalizedRun) {
        await appendRunEvent(finalizedRun, seq++, {
          eventType: "lifecycle",
          stream: "system",
          level: outcome === "succeeded" ? "info" : "error",
          message: `run ${outcome}`,
          payload: {
            status,
            exitCode: adapterResult.exitCode,
          },
        });
      }

      if (finalizedRun) {
        await updateRuntimeState(agent, finalizedRun, adapterResult);
      }
      await finalizeAgentStatus(agent.id, outcome);
    } catch (err) {
      const message = err instanceof Error ? err.message : "Unknown adapter failure";
      logger.error({ err, runId }, "heartbeat execution failed");

      let logSummary: { bytes: number; sha256?: string; compressed: boolean } | null = null;
      if (handle) {
        try {
          logSummary = await runLogStore.finalize(handle);
        } catch (finalizeErr) {
          logger.warn({ err: finalizeErr, runId }, "failed to finalize run log after error");
        }
      }

      const failedRun = await setRunStatus(run.id, "failed", {
        error: message,
        errorCode: "adapter_failed",
        finishedAt: new Date(),
        stdoutExcerpt,
        stderrExcerpt,
        logBytes: logSummary?.bytes,
        logSha256: logSummary?.sha256,
        logCompressed: logSummary?.compressed ?? false,
      });
      await setWakeupStatus(run.wakeupRequestId, "failed", {
        finishedAt: new Date(),
        error: message,
      });

      if (failedRun) {
        await appendRunEvent(failedRun, seq++, {
          eventType: "error",
          stream: "system",
          level: "error",
          message,
        });

        await updateRuntimeState(agent, failedRun, {
          exitCode: null,
          signal: null,
          timedOut: false,
          errorMessage: message,
        });
      }

      await finalizeAgentStatus(agent.id, "failed");
    }
  }

  async function enqueueWakeup(agentId: string, opts: WakeupOptions = {}) {
    const source = opts.source ?? "on_demand";
    const triggerDetail = opts.triggerDetail ?? null;
    const contextSnapshot = opts.contextSnapshot ?? {};

    const agent = await getAgent(agentId);
    if (!agent) throw notFound("Agent not found");

    if (agent.status === "paused" || agent.status === "terminated") {
      throw conflict("Agent is not invokable in its current state", { status: agent.status });
    }

    const policy = parseHeartbeatPolicy(agent);
    const writeSkippedRequest = async (reason: string) => {
      await db.insert(agentWakeupRequests).values({
        companyId: agent.companyId,
        agentId,
        source,
        triggerDetail,
        reason,
        payload: opts.payload ?? null,
        status: "skipped",
        requestedByActorType: opts.requestedByActorType ?? null,
        requestedByActorId: opts.requestedByActorId ?? null,
        idempotencyKey: opts.idempotencyKey ?? null,
        finishedAt: new Date(),
      });
    };

    if (source === "timer" && !policy.enabled) {
      await writeSkippedRequest("heartbeat.disabled");
      return null;
    }
    if (source === "assignment" && !policy.wakeOnAssignment) {
      await writeSkippedRequest("heartbeat.wakeOnAssignment.disabled");
      return null;
    }
    if (source === "automation" && !policy.wakeOnAutomation) {
      await writeSkippedRequest("heartbeat.wakeOnAutomation.disabled");
      return null;
    }
    if (source === "on_demand" && triggerDetail === "ping" && !policy.wakeOnOnDemand) {
      await writeSkippedRequest("heartbeat.wakeOnOnDemand.disabled");
      return null;
    }

    const activeRun = await db
      .select()
      .from(heartbeatRuns)
      .where(and(eq(heartbeatRuns.agentId, agentId), inArray(heartbeatRuns.status, ["queued", "running"])))
      .orderBy(desc(heartbeatRuns.createdAt))
      .then((rows) => rows[0] ?? null);

    if (activeRun) {
      await db.insert(agentWakeupRequests).values({
        companyId: agent.companyId,
        agentId,
        source,
        triggerDetail,
        reason: opts.reason ?? null,
        payload: opts.payload ?? null,
        status: "coalesced",
        coalescedCount: 1,
        requestedByActorType: opts.requestedByActorType ?? null,
        requestedByActorId: opts.requestedByActorId ?? null,
        idempotencyKey: opts.idempotencyKey ?? null,
        runId: activeRun.id,
        finishedAt: new Date(),
      });
      return activeRun;
    }

    const wakeupRequest = await db
      .insert(agentWakeupRequests)
      .values({
        companyId: agent.companyId,
        agentId,
        source,
        triggerDetail,
        reason: opts.reason ?? null,
        payload: opts.payload ?? null,
        status: "queued",
        requestedByActorType: opts.requestedByActorType ?? null,
        requestedByActorId: opts.requestedByActorId ?? null,
        idempotencyKey: opts.idempotencyKey ?? null,
      })
      .returning()
      .then((rows) => rows[0]);

    const runtime = await getRuntimeState(agent.id);

    const run = await db
      .insert(heartbeatRuns)
      .values({
        companyId: agent.companyId,
        agentId,
        invocationSource: source,
        triggerDetail,
        status: "queued",
        wakeupRequestId: wakeupRequest.id,
        contextSnapshot,
        sessionIdBefore: runtime?.sessionId ?? null,
      })
      .returning()
      .then((rows) => rows[0]);

    await db
      .update(agentWakeupRequests)
      .set({
        runId: run.id,
        updatedAt: new Date(),
      })
      .where(eq(agentWakeupRequests.id, wakeupRequest.id));

    publishLiveEvent({
      companyId: run.companyId,
      type: "heartbeat.run.queued",
      payload: {
        runId: run.id,
        agentId: run.agentId,
        invocationSource: run.invocationSource,
        triggerDetail: run.triggerDetail,
        wakeupRequestId: run.wakeupRequestId,
      },
    });

    void executeRun(run.id).catch((err) => {
      logger.error({ err, runId: run.id }, "heartbeat execution failed");
    });

    return run;
  }

  return {
    list: (companyId: string, agentId?: string) => {
      if (!agentId) {
        return db
          .select()
          .from(heartbeatRuns)
          .where(eq(heartbeatRuns.companyId, companyId))
          .orderBy(desc(heartbeatRuns.createdAt));
      }

      return db
        .select()
        .from(heartbeatRuns)
        .where(and(eq(heartbeatRuns.companyId, companyId), eq(heartbeatRuns.agentId, agentId)))
        .orderBy(desc(heartbeatRuns.createdAt));
    },

    getRun,

    getRuntimeState: async (agentId: string) => {
      const state = await getRuntimeState(agentId);
      if (state) return state;

      const agent = await getAgent(agentId);
      if (!agent) return null;
      return ensureRuntimeState(agent);
    },

    resetRuntimeSession: async (agentId: string) => {
      const agent = await getAgent(agentId);
      if (!agent) throw notFound("Agent not found");
      await ensureRuntimeState(agent);

      return db
        .update(agentRuntimeState)
        .set({
          sessionId: null,
          stateJson: {},
          lastError: null,
          updatedAt: new Date(),
        })
        .where(eq(agentRuntimeState.agentId, agentId))
        .returning()
        .then((rows) => rows[0] ?? null);
    },

    listEvents: (runId: string, afterSeq = 0, limit = 200) =>
      db
        .select()
        .from(heartbeatRunEvents)
        .where(and(eq(heartbeatRunEvents.runId, runId), gt(heartbeatRunEvents.seq, afterSeq)))
        .orderBy(asc(heartbeatRunEvents.seq))
        .limit(Math.max(1, Math.min(limit, 1000))),

    readLog: async (runId: string, opts?: { offset?: number; limitBytes?: number }) => {
      const run = await getRun(runId);
      if (!run) throw notFound("Heartbeat run not found");
      if (!run.logStore || !run.logRef) throw notFound("Run log not found");

      const result = await runLogStore.read(
        {
          store: run.logStore as "local_file",
          logRef: run.logRef,
        },
        opts,
      );

      return {
        runId,
        store: run.logStore,
        logRef: run.logRef,
        ...result,
      };
    },

    invoke: async (
      agentId: string,
      source: "timer" | "assignment" | "on_demand" | "automation" = "on_demand",
      contextSnapshot: Record<string, unknown> = {},
      triggerDetail: "manual" | "ping" | "callback" | "system" = "manual",
      actor?: { actorType?: "user" | "agent" | "system"; actorId?: string | null },
    ) =>
      enqueueWakeup(agentId, {
        source,
        triggerDetail,
        contextSnapshot,
        requestedByActorType: actor?.actorType,
        requestedByActorId: actor?.actorId ?? null,
      }),

    wakeup: enqueueWakeup,

    tickTimers: async (now = new Date()) => {
      const allAgents = await db.select().from(agents);
      let checked = 0;
      let enqueued = 0;
      let skipped = 0;

      for (const agent of allAgents) {
        if (agent.status === "paused" || agent.status === "terminated") continue;
        const policy = parseHeartbeatPolicy(agent);
        if (!policy.enabled || policy.intervalSec <= 0) continue;

        checked += 1;
        const last = agent.lastHeartbeatAt ? new Date(agent.lastHeartbeatAt).getTime() : 0;
        const elapsedMs = now.getTime() - last;
        if (last && elapsedMs < policy.intervalSec * 1000) continue;

        const run = await enqueueWakeup(agent.id, {
          source: "timer",
          triggerDetail: "system",
          reason: "heartbeat_timer",
          requestedByActorType: "system",
          requestedByActorId: "heartbeat_scheduler",
          contextSnapshot: {
            source: "scheduler",
            reason: "interval_elapsed",
            now: now.toISOString(),
          },
        });
        if (run) enqueued += 1;
        else skipped += 1;
      }

      return { checked, enqueued, skipped };
    },

    cancelRun: async (runId: string) => {
      const run = await getRun(runId);
      if (!run) throw notFound("Heartbeat run not found");
      if (run.status !== "running" && run.status !== "queued") return run;

      const running = runningProcesses.get(run.id);
      if (running) {
        running.child.kill("SIGTERM");
        const graceMs = Math.max(1, running.graceSec) * 1000;
        setTimeout(() => {
          if (!running.child.killed) {
            running.child.kill("SIGKILL");
          }
        }, graceMs);
      }

      const cancelled = await setRunStatus(run.id, "cancelled", {
        finishedAt: new Date(),
        error: "Cancelled by control plane",
        errorCode: "cancelled",
      });

      await setWakeupStatus(run.wakeupRequestId, "cancelled", {
        finishedAt: new Date(),
        error: "Cancelled by control plane",
      });

      if (cancelled) {
        await appendRunEvent(cancelled, 1, {
          eventType: "lifecycle",
          stream: "system",
          level: "warn",
          message: "run cancelled",
        });
      }

      runningProcesses.delete(run.id);
      await finalizeAgentStatus(run.agentId, "cancelled");
      return cancelled;
    },

    cancelActiveForAgent: async (agentId: string) => {
      const runs = await db
        .select()
        .from(heartbeatRuns)
        .where(and(eq(heartbeatRuns.agentId, agentId), inArray(heartbeatRuns.status, ["queued", "running"])));

      for (const run of runs) {
        await setRunStatus(run.id, "cancelled", {
          finishedAt: new Date(),
          error: "Cancelled due to agent pause",
          errorCode: "cancelled",
        });

        await setWakeupStatus(run.wakeupRequestId, "cancelled", {
          finishedAt: new Date(),
          error: "Cancelled due to agent pause",
        });

        const running = runningProcesses.get(run.id);
        if (running) {
          running.child.kill("SIGTERM");
          runningProcesses.delete(run.id);
        }
      }

      return runs.length;
    },
  };
}