import type { AgentRunStore } from "./store.js";
import type { CommandRecord, FailureKind, JsonRecord, JsonValue, RunEvent, RunRecord, RunnerJobRecord, TerminalStatus } from "../common/types.js";
import { boundedTextSummary, outputBytesFromPayload, outputTruncatedFromPayload } from "../common/output.js";

const maxToolCallSummaryItems = 40;
const toolCallCommandLimitChars = 600;
const toolCallFieldLimitChars = 200;

const RESULT_EVENT_PAGE_LIMIT = 500;
const RESULT_EVENT_MAX_PAGES = 200;

interface ResultEventPage {
  events: RunEvent[];
  capped: boolean;
  nextAfterSeq: number | null;
}

interface AssistantReplySummary {
  text: string;
  seq: number | null;
  source: string | null;
  final: boolean;
  replyAuthority: boolean;
  textTruncated: boolean;
  outputTruncated: boolean;
}

interface TerminalClassificationInput {
  terminal: TerminalStatus | null;
  terminalSource: string;
  failureKind: FailureKind | null;
  failureMessage: string | null;
  timeoutBudget: JsonRecord;
  transportDisconnect: RunEvent | null;
  lastActivity: JsonRecord | null;
  command: CommandRecord | null;
}

export async function buildRunResult(store: AgentRunStore, runId: string, commandId?: string): Promise<JsonRecord> {
  const run = await store.getRun(runId);
  const command = await selectCommand(store, runId, commandId);
  const eventPage = await listResultEvents(store, runId);
  const events = eventPage.events;
  const scopedEvents = command ? eventsForCommand(events, command.id) : events;
  const jobs = await store.listRunnerJobs(runId, command?.id);
  const latestJob = jobs.at(-1) ?? null;
  const commandTerminal = command ? terminalFromCommand(command) : null;
  const terminalEventStatus = terminalFromEvents(scopedEvents);
  const preliminaryTerminal = commandTerminal ?? terminalEventStatus ?? run.terminalStatus;
  const failureKind = resultFailureKind(run, command, scopedEvents, preliminaryTerminal);
  const terminal = resultTerminal(commandTerminal, terminalEventStatus, run.terminalStatus, failureKind);
  const terminalSource = resultTerminalSource(commandTerminal, terminalEventStatus, run.terminalStatus, failureKind);
  const failureMessage = resultFailureMessage(run, command, scopedEvents, terminal);
  const failureDetails = resultFailureDetails(scopedEvents, terminal);
  const reply = assistantReply(scopedEvents);
  const blocker = terminal === "blocked" || terminal === "failed" ? { failureKind, message: failureMessage, details: failureDetails } : null;
  const liveness = livenessSnapshot(run, command, events, scopedEvents, terminal, failureKind, failureMessage);
  const terminalClassification = terminalClassificationSummary({ terminal, terminalSource, failureKind, failureMessage, liveness });
  const steerDelivery = command?.type === "steer" ? steerDeliverySummary(events, command.id) : null;
  return {
    runId: run.id,
    commandId: command?.id ?? commandId ?? null,
    attemptId: latestJob?.attemptId ?? attemptFromEvents(events),
    runnerId: latestJob?.runnerId ?? null,
    jobName: latestJob?.jobName ?? null,
    namespace: latestJob?.namespace ?? null,
    status: command?.state ?? run.status,
    runStatus: run.status,
    commandState: command?.state ?? null,
    terminalStatus: terminal,
    terminalSource,
    completed: terminal === "completed",
    reply: reply.text,
    finalResponse: {
      text: reply.text,
      seq: reply.seq,
      source: reply.source,
      final: reply.final,
      replyAuthority: reply.replyAuthority,
      textTruncated: reply.textTruncated,
      outputTruncated: reply.outputTruncated,
    },
    finalAssistantSeq: reply.seq,
    finalAssistantSource: reply.source,
    finalAssistantTextTruncated: reply.textTruncated,
    finalAssistantOutputTruncated: reply.outputTruncated,
    failureKind,
    failureMessage,
    failureDetails,
    terminalClassification,
    blocker,
    liveness,
    ...(steerDelivery ? { steerDelivery } : {}),
    lastSeq: events.at(-1)?.seq ?? 0,
    eventCount: events.length,
    eventsCapped: eventPage.capped,
    nextAfterSeq: eventPage.nextAfterSeq,
    scopedEventCount: scopedEvents.length,
    scopedLastSeq: scopedEvents.at(-1)?.seq ?? 0,
    artifactSummary: artifactSummary(scopedEvents),
    toolCallSummary: toolCallSummary(scopedEvents),
    sessionRef: sessionSummary(run),
    resourceBundleRef: resourceBundleSummary(run, events),
    runnerJobCount: jobs.length,
  };
}

function livenessSnapshot(run: RunRecord, command: CommandRecord | null, events: RunEvent[], scopedEvents: RunEvent[], terminal: TerminalStatus | null, failureKind: FailureKind | null, failureMessage: string | null): JsonRecord {
  const nowMs = Date.now();
  const active = terminal === null && !runIsTerminal(run) && !commandIsTerminal(command);
  const lastEvent = events.at(-1) ?? null;
  const lastVisibleActivity = latestVisibleActivity(scopedEvents);
  const lastBusinessActivity = latestBusinessActivity(scopedEvents);
  const lastCommandActivity = lastBusinessActivity ?? latestLivenessActivity(scopedEvents);
  const lease = leaseSummary(run, nowMs);
  const transportDisconnect = latestTransportDisconnect(scopedEvents);
  const lastActivity = livenessActivitySummary(lastCommandActivity, nowMs);
  const timeoutBudget = timeoutBudgetSummary(run, command, terminal, failureKind, nowMs);
  const terminalClassification = terminalClassificationFromEvidence({ terminal, terminalSource: "liveness", failureKind, failureMessage, timeoutBudget, transportDisconnect, lastActivity, command });
  const phase = livenessPhase({ active, command, lastVisibleActivity, leaseExpired: lease.leaseExpired, transportDisconnect, timeoutBudget, lastActivity });
  const afterSeq = lastEvent?.seq ?? 0;
  return {
    phase,
    active,
    observedAt: new Date(nowMs).toISOString(),
    runStatus: run.status,
    commandId: command?.id ?? null,
    commandType: command?.type ?? null,
    commandState: command?.state ?? null,
    lastSeq: lastEvent?.seq ?? 0,
    lastEventAt: lastEvent?.createdAt ?? null,
    lastEventAgeMs: lastEvent ? ageMs(lastEvent.createdAt, nowMs) : null,
    lastActivity,
    lastCommandActivity: lastActivity,
    timeoutBudget,
    terminalClassification,
    lease,
    transportDisconnect: transportDisconnect ? livenessActivitySummary(transportDisconnect, nowMs) : null,
    recoveryActions: recoveryActions({ run, command, afterSeq, active, terminal, failureKind, failureMessage }),
    valuesPrinted: false,
  };
}

function livenessPhase(input: { active: boolean; command: CommandRecord | null; lastVisibleActivity: RunEvent | null; leaseExpired: boolean | null; transportDisconnect: RunEvent | null; timeoutBudget: JsonRecord; lastActivity: JsonRecord | null }): string {
  if (!input.active) return "terminal";
  if (input.command?.state === "pending") return "waiting-runner";
  if (input.leaseExpired === true) return "runner-heartbeat-stale";
  if (input.transportDisconnect) return "transport-disconnected";
  if (input.lastVisibleActivity?.type === "tool_call") {
    const status = input.lastVisibleActivity.payload.status;
    if (status === "inProgress" || status === "running") return "waiting-tool";
    if (status === "completed") return "idle-after-tool";
  }
  if (input.lastVisibleActivity?.type === "command_output") return "waiting-tool-output";
  if (input.lastVisibleActivity?.type === "assistant_message") return "waiting-model-output";
  const remainingMs = numberJsonValue(input.timeoutBudget.remainingMs);
  const timeoutMs = numberJsonValue(input.timeoutBudget.timeoutMs);
  const activityAgeMs = numberJsonValue(input.lastActivity?.ageMs);
  const inactiveThresholdMs = timeoutMs === null ? 300_000 : Math.min(300_000, Math.max(60_000, Math.floor(timeoutMs / 4)));
  if (remainingMs !== null && remainingMs <= Math.min(120_000, Math.max(10_000, Math.floor((timeoutMs ?? 120_000) / 10))) && (activityAgeMs === null || activityAgeMs >= inactiveThresholdMs)) return "runner-stdio-inactive";
  return "waiting-model";
}

function terminalClassificationSummary(input: { terminal: TerminalStatus | null; terminalSource: string; failureKind: FailureKind | null; failureMessage: string | null; liveness: JsonRecord }): JsonRecord {
  const livenessClassification = jsonRecordValue(input.liveness.terminalClassification);
  return {
    ...(livenessClassification ?? {}),
    terminalStatus: input.terminal,
    terminalSource: input.terminalSource,
    failureKind: input.failureKind,
    failureMessage: input.failureMessage ? boundedTextSummary(input.failureMessage, { limitChars: 240 }).text as string : null,
    valuesPrinted: false,
  };
}

function terminalClassificationFromEvidence(input: TerminalClassificationInput): JsonRecord {
  const timeoutState = stringJsonValue(input.timeoutBudget.state);
  const hardTimeout = input.failureKind === "backend-timeout" || timeoutState === "timed-out";
  const providerKind = providerFailureCategory(input.failureKind);
  const cancelled = input.terminal === "cancelled" || input.failureKind === "cancelled";
  const taskFailure = input.terminal === "failed" && input.failureKind !== null && !hardTimeout && !providerKind && !infrastructureFailureKind(input.failureKind);
  let category = "unknown";
  let confidence = "low";
  let providerEvidence = "not-applicable";
  let reason = "terminal state is not yet available";

  if (input.terminal === "completed") {
    category = "completed";
    confidence = "high";
    reason = "command completed successfully";
  } else if (cancelled) {
    category = "cancelled";
    confidence = "high";
    reason = "terminal status or failureKind is cancelled";
  } else if (providerKind) {
    category = providerKind;
    confidence = "high";
    providerEvidence = "failure-kind";
    reason = `failureKind ${input.failureKind} is provider-specific`;
  } else if (hardTimeout && input.transportDisconnect) {
    category = "execution-hard-timeout";
    confidence = "medium";
    providerEvidence = "observed-transport-disconnect";
    reason = "hard timeout is terminal and a backend transport/app-server close event was observed, but existing events do not prove the model provider caused it";
  } else if (hardTimeout) {
    category = "execution-hard-timeout";
    confidence = "high";
    providerEvidence = "insufficient";
    reason = "hard timeout is terminal; no provider-specific failure event was recorded";
  } else if (input.terminal === "blocked") {
    category = "blocked";
    confidence = "high";
    reason = `terminal status is blocked${input.failureKind ? ` with failureKind ${input.failureKind}` : ""}`;
  } else if (taskFailure) {
    category = "task-failed";
    confidence = "medium";
    reason = `terminal failure is not timeout, cancellation, provider-specific, or infrastructure-classified${input.failureKind ? `; failureKind=${input.failureKind}` : ""}`;
  } else if (input.terminal === "failed" && infrastructureFailureKind(input.failureKind)) {
    category = "infrastructure-failed";
    confidence = "medium";
    reason = `failureKind ${input.failureKind} is infrastructure/backend classified`;
  }

  return {
    category,
    confidence,
    providerEvidence,
    providerInterruption: providerEvidence === "failure-kind" || providerEvidence === "observed-transport-disconnect" ? providerEvidence : "not-established",
    providerInterruptionKnown: providerEvidence === "failure-kind",
    providerInterruptionReason: providerEvidence === "failure-kind"
      ? "provider-specific failureKind is authoritative"
      : providerEvidence === "observed-transport-disconnect"
        ? "transport disconnect was observed, but current events cannot distinguish provider outage from runner/backend shutdown during timeout"
        : providerEvidence === "insufficient"
          ? "no provider-specific error or disconnect evidence was recorded"
          : null,
    hardTimeout,
    timeoutState,
    transportDisconnectObserved: Boolean(input.transportDisconnect),
    transportDisconnectSeq: input.transportDisconnect?.seq ?? null,
    lastActivityKind: stringJsonValue(input.lastActivity?.activityKind),
    lastActivitySeq: numberJsonValue(input.lastActivity?.sourceSeq),
    commandId: input.command?.id ?? null,
    reason,
    valuesPrinted: false,
  };
}

function providerFailureCategory(failureKind: FailureKind | null): string | null {
  if (!failureKind) return null;
  if (failureKind === "provider-stream-disconnected") return "provider-interrupted";
  if (failureKind.startsWith("provider-")) return "provider-failed";
  return null;
}

function infrastructureFailureKind(failureKind: FailureKind | null): boolean {
  if (!failureKind) return false;
  return failureKind.startsWith("backend-") || failureKind === "runner-lease-conflict" || failureKind === "infra-failed" || failureKind === "thread-resume-failed";
}

function timeoutBudgetSummary(run: RunRecord, command: CommandRecord | null, terminal: TerminalStatus | null, failureKind: FailureKind | null, nowMs: number): JsonRecord {
  const timeoutMs = typeof run.executionPolicy.timeoutMs === "number" && Number.isFinite(run.executionPolicy.timeoutMs) && run.executionPolicy.timeoutMs > 0 ? Math.trunc(run.executionPolicy.timeoutMs) : null;
  const startedAt = command?.acknowledgedAt ?? command?.createdAt ?? run.updatedAt ?? run.createdAt;
  const startedMs = Date.parse(startedAt);
  const elapsedMs = timeoutMs !== null && Number.isFinite(startedMs) ? Math.max(0, nowMs - startedMs) : null;
  const remainingMs = timeoutMs !== null && elapsedMs !== null ? Math.max(0, timeoutMs - elapsedMs) : null;
  const approachingThresholdMs = timeoutMs === null ? null : Math.min(120_000, Math.max(10_000, Math.floor(timeoutMs / 10)));
  let state = "unknown";
  if (timeoutMs !== null && elapsedMs !== null) {
    if (terminal !== null) state = failureKind === "backend-timeout" ? "timed-out" : "terminal";
    else if (remainingMs === 0) state = "overdue";
    else if (approachingThresholdMs !== null && remainingMs !== null && remainingMs <= approachingThresholdMs) state = "approaching-hard-timeout";
    else state = "within-budget";
  }
  return {
    timeoutMs,
    source: "executionPolicy.timeoutMs",
    startedAt,
    elapsedMs,
    remainingMs,
    approachingThresholdMs,
    state,
    hardTimeout: true,
    valuesPrinted: false,
  };
}

function leaseSummary(run: RunRecord, nowMs: number): JsonRecord & { leaseExpired: boolean | null } {
  const leaseExpiresMs = run.leaseExpiresAt ? Date.parse(run.leaseExpiresAt) : NaN;
  const hasLease = Boolean(run.claimedBy && run.leaseExpiresAt && Number.isFinite(leaseExpiresMs));
  const leaseExpired = run.claimedBy ? (hasLease ? leaseExpiresMs <= nowMs : true) : null;
  return {
    claimedBy: run.claimedBy,
    leaseExpiresAt: run.leaseExpiresAt,
    leaseExpired,
    leaseRemainingMs: hasLease ? Math.max(0, leaseExpiresMs - nowMs) : null,
    valuesPrinted: false,
  };
}

function latestLivenessActivity(events: RunEvent[]): RunEvent | null {
  return [...events].reverse().find(isLivenessActivityEvent) ?? null;
}

function latestVisibleActivity(events: RunEvent[]): RunEvent | null {
  return [...events].reverse().find((event) => event.type === "assistant_message" || event.type === "tool_call" || event.type === "command_output" || event.type === "diff" || event.type === "error" || event.type === "terminal_status") ?? null;
}

function latestBusinessActivity(events: RunEvent[]): RunEvent | null {
  return [...events].reverse().find((event) => event.type === "assistant_message" || event.type === "tool_call" || event.type === "command_output" || event.type === "diff") ?? null;
}

function isLivenessActivityEvent(event: RunEvent): boolean {
  if (event.type === "assistant_message" || event.type === "tool_call" || event.type === "command_output" || event.type === "diff" || event.type === "error" || event.type === "terminal_status") return true;
  if (event.type !== "backend_status") return false;
  const phase = typeof event.payload.phase === "string" ? event.payload.phase : "";
  return ["backend-turn-started", "thread/start:completed", "thread/resume:completed", "turn/start:completed", "backend-turn-finished", "codex-app-server-closed"].includes(phase);
}

function latestTransportDisconnect(events: RunEvent[]): RunEvent | null {
  return [...events].reverse().find((event) => {
    const phase = typeof event.payload.phase === "string" ? event.payload.phase : "";
    return (event.type === "error" && phase.includes("transport")) || (event.type === "backend_status" && phase === "codex-app-server-closed");
  }) ?? null;
}

function livenessActivitySummary(event: RunEvent | null, nowMs: number): JsonRecord | null {
  if (!event) return null;
  return {
    seq: event.seq,
    sourceSeq: event.seq,
    eventId: event.id,
    type: event.type,
    activityKind: activityKind(event),
    phase: typeof event.payload.phase === "string" ? event.payload.phase : null,
    status: typeof event.payload.status === "string" ? event.payload.status : null,
    toolName: typeof event.payload.toolName === "string" ? event.payload.toolName : null,
    itemId: typeof event.payload.itemId === "string" ? event.payload.itemId : null,
    exitCode: normalizedExitCode(event.payload.exitCode),
    commandId: typeof event.payload.commandId === "string" ? event.payload.commandId : null,
    createdAt: event.createdAt,
    ageMs: ageMs(event.createdAt, nowMs),
    summary: activityTextSummary(event),
    valuesPrinted: false,
  };
}

function activityKind(event: RunEvent): string {
  if (event.type === "tool_call") {
    const status = typeof event.payload.status === "string" ? event.payload.status : "";
    if (status === "running" || status === "inProgress") return "tool-in-flight";
    if (status === "completed") return "tool-completed";
    if (status === "cancelled") return "tool-cancelled";
    if (status === "failed") return "tool-failed";
    return "tool";
  }
  if (event.type === "command_output") return "tool-output";
  if (event.type === "assistant_message") return event.payload.progress === true ? "assistant-progress" : "assistant-output";
  if (event.type === "diff") return "diff";
  if (event.type === "error") return "error";
  if (event.type === "terminal_status") return "terminal";
  return "backend-activity";
}

function activityTextSummary(event: RunEvent): string | null {
  if (event.type === "tool_call") {
    const name = typeof event.payload.toolName === "string" ? event.payload.toolName : typeof event.payload.type === "string" ? event.payload.type : "tool";
    const status = typeof event.payload.status === "string" ? event.payload.status : "observed";
    return `${name} ${status}`;
  }
  const fromSummary = typeof event.payload.outputSummary === "string" ? event.payload.outputSummary : typeof event.payload.summary === "string" ? event.payload.summary : null;
  const text = fromSummary ?? textPayload(event.payload) ?? (typeof event.payload.phase === "string" ? event.payload.phase : null);
  if (!text) return null;
  return boundedTextSummary(text.replace(/\s+/gu, " ").trim(), { limitChars: 240 }).text as string;
}

function ageMs(value: string, nowMs: number): number | null {
  const parsed = Date.parse(value);
  return Number.isFinite(parsed) ? Math.max(0, nowMs - parsed) : null;
}

function recoveryActions(input: { run: RunRecord; command: CommandRecord | null; afterSeq: number; active: boolean; terminal: TerminalStatus | null; failureKind: FailureKind | null; failureMessage: string | null }): JsonRecord[] {
  const { run, command, afterSeq, active, terminal, failureKind, failureMessage } = input;
  const sessionId = run.sessionRef?.sessionId ?? null;
  const traceCommand = sessionId ? `./scripts/agentrun sessions trace ${sessionId} --after-seq ${afterSeq} --limit 100 --run-id ${run.id}` : `./scripts/agentrun runs events ${run.id} --after-seq ${afterSeq} --limit 100 --summary`;
  const outputCommand = sessionId ? `./scripts/agentrun sessions output ${sessionId} --after-seq ${afterSeq} --limit 100 --run-id ${run.id}` : null;
  const actions: JsonRecord[] = [
    { action: "poll-trace", runId: run.id, commandId: command?.id ?? null, afterSeq, command: traceCommand, valuesPrinted: false },
  ];
  if (outputCommand) actions.push({ action: "poll-output", runId: run.id, commandId: command?.id ?? null, afterSeq, command: outputCommand, valuesPrinted: false });
  if (active) {
    if (sessionId) actions.push({ action: "steer-session", sessionId, runId: run.id, commandId: command?.id ?? null, command: `./scripts/agentrun sessions steer ${sessionId} --prompt-stdin`, valuesPrinted: false });
    if (command) actions.push({ action: "cancel-command", runId: run.id, commandId: command.id, command: `./scripts/agentrun commands cancel ${command.id} --reason <reason>`, valuesPrinted: false });
    else actions.push({ action: "cancel-run", runId: run.id, command: `./scripts/agentrun runs cancel ${run.id} --reason <reason>`, valuesPrinted: false });
    return actions;
  }
  if (terminal === "failed" || terminal === "blocked" || terminal === "cancelled") {
    if (command) actions.push({ action: "inspect-result", runId: run.id, commandId: command.id, command: `./scripts/agentrun commands result ${command.id} --run-id ${run.id}`, valuesPrinted: false });
    if (sessionId) actions.push({ action: "resume-session", sessionId, command: `./scripts/agentrun sessions turn ${sessionId} --prompt-stdin`, valuesPrinted: false });
    if (failureKind === "backend-timeout") actions.push({ action: "split-task", reason: "backend-timeout", hint: "把大 patch / 长工具链拆成更短 turn 后用同一 session 续跑", failureMessage: failureMessage ? boundedTextSummary(failureMessage, { limitChars: 200 }).text as string : null, valuesPrinted: false });
    else actions.push({ action: "retry-or-split", reason: failureKind ?? "terminal", hint: "先读 trace/output 的 detail id，再决定 steer、重跑或拆分", valuesPrinted: false });
  }
  return actions;
}

function numberJsonValue(value: JsonValue | undefined): number | null {
  return typeof value === "number" && Number.isFinite(value) ? value : null;
}

function stringJsonValue(value: JsonValue | undefined): string | null {
  return typeof value === "string" && value.length > 0 ? value : null;
}

function jsonRecordValue(value: unknown): JsonRecord | null {
  return typeof value === "object" && value !== null && !Array.isArray(value) ? value as JsonRecord : null;
}

function steerDeliverySummary(events: RunEvent[], commandId: string): JsonRecord {
  const related = events.filter((event) => event.payload.commandId === commandId);
  const completed = latestPhaseEvent(related, "turn/steer:completed");
  const acknowledged = latestPhaseEvent(related, "steer-command-acknowledged");
  const failed = [...related].reverse().find((event) => event.type === "error") ?? null;
  const deliverySeq = completed?.seq ?? failed?.seq ?? acknowledged?.seq ?? related.at(-1)?.seq ?? null;
  const targetCommandId = targetCommandIdFromEvents(related);
  const targetFollowUp = targetCommandId && deliverySeq !== null ? targetFollowUpAfterSeq(events, targetCommandId, deliverySeq) : null;
  return {
    commandId,
    targetCommandId,
    deliveryState: failed ? "failed" : completed ? "forwarded-to-backend" : acknowledged ? "acknowledged-by-runner" : "not-observed",
    backendAccepted: Boolean(completed),
    targetFollowUpObserved: targetFollowUp?.observed ?? null,
    targetFollowUpSeq: targetFollowUp?.seq ?? null,
    targetFollowUpType: targetFollowUp?.type ?? null,
    targetFollowUpPhase: targetFollowUp?.phase ?? null,
    semantics: "steer completion means the backend accepted the turn/steer RPC; target turn progress is reported by the target command liveness and is not implied by the steer command terminal state",
    valuesPrinted: false,
  };
}

function latestPhaseEvent(events: RunEvent[], phase: string): RunEvent | null {
  return [...events].reverse().find((event) => event.payload.phase === phase) ?? null;
}

function targetCommandIdFromEvents(events: RunEvent[]): string | null {
  for (const event of [...events].reverse()) {
    const targetCommandId = event.payload.targetCommandId;
    if (typeof targetCommandId === "string" && targetCommandId.length > 0) return targetCommandId;
  }
  return null;
}

function targetFollowUpAfterSeq(events: RunEvent[], targetCommandId: string, afterSeq: number): JsonRecord {
  const event = events.find((item) => item.seq > afterSeq && item.payload.commandId === targetCommandId && isTargetFollowUpEvent(item));
  return {
    observed: Boolean(event),
    seq: event?.seq ?? null,
    type: event?.type ?? null,
    phase: typeof event?.payload.phase === "string" ? event.payload.phase : null,
  };
}

function isTargetFollowUpEvent(event: RunEvent): boolean {
  return event.type === "assistant_message" || event.type === "tool_call" || event.type === "command_output" || event.type === "diff" || event.type === "error" || event.type === "terminal_status";
}

function runIsTerminal(run: RunRecord): boolean {
  return run.status === "completed" || run.status === "failed" || run.status === "blocked" || run.status === "cancelled";
}

function commandIsTerminal(command: CommandRecord | null): boolean {
  return command ? terminalFromCommand(command) !== null : false;
}

async function listResultEvents(store: AgentRunStore, runId: string): Promise<ResultEventPage> {
  const events: RunEvent[] = [];
  let afterSeq = 0;
  for (let pageIndex = 0; pageIndex < RESULT_EVENT_MAX_PAGES; pageIndex += 1) {
    const page = await store.listEvents(runId, afterSeq, RESULT_EVENT_PAGE_LIMIT);
    if (page.length === 0) return { events, capped: false, nextAfterSeq: null };
    events.push(...page);
    const nextAfterSeq = page.at(-1)?.seq ?? afterSeq;
    if (nextAfterSeq <= afterSeq) return { events, capped: true, nextAfterSeq: afterSeq };
    afterSeq = nextAfterSeq;
    if (page.length < RESULT_EVENT_PAGE_LIMIT) return { events, capped: false, nextAfterSeq: null };
  }
  return { events, capped: true, nextAfterSeq: events.at(-1)?.seq ?? afterSeq };
}

async function selectCommand(store: AgentRunStore, runId: string, commandId?: string): Promise<CommandRecord | null> {
  if (commandId) {
    const command = await store.getCommand(commandId);
    return command.runId === runId ? command : null;
  }
  const commands = await store.listCommands(runId, 0, 100);
  return commands.at(-1) ?? null;
}

function terminalFromEvents(events: RunEvent[]): TerminalStatus | null {
  for (const event of [...events].reverse()) {
    if (event.type !== "terminal_status") continue;
    const value = event.payload.terminalStatus;
    if (value === "completed" || value === "failed" || value === "blocked" || value === "cancelled") return value;
  }
  return null;
}

function terminalFromCommand(command: CommandRecord): TerminalStatus | null {
  if (command.state === "completed") return "completed";
  if (command.state === "failed") return "failed";
  if (command.state === "cancelled") return "cancelled";
  return null;
}

function resultTerminal(commandTerminal: TerminalStatus | null, terminalEventStatus: TerminalStatus | null, runTerminalStatus: TerminalStatus | null, failureKind: FailureKind | null): TerminalStatus | null {
  if (commandTerminal === "failed" && terminalEventStatus === "blocked" && failureKind === "required-skill-unavailable") return "blocked";
  return commandTerminal ?? terminalEventStatus ?? runTerminalStatus;
}

function resultTerminalSource(commandTerminal: TerminalStatus | null, terminalEventStatus: TerminalStatus | null, runTerminalStatus: TerminalStatus | null, failureKind: FailureKind | null): string {
  if (commandTerminal === "failed" && terminalEventStatus === "blocked" && failureKind === "required-skill-unavailable") return "terminal_status-event";
  if (commandTerminal) return "command-record";
  if (terminalEventStatus) return "terminal_status-event";
  if (runTerminalStatus) return "run-record";
  return "none";
}

function eventsForCommand(events: RunEvent[], commandId: string): RunEvent[] {
  const scoped = events.filter((event) => event.payload.commandId === commandId || typeof event.payload.commandId !== "string");
  return scoped.length > 0 ? scoped : events;
}

function failureKindFromEvents(events: RunEvent[]): FailureKind | null {
  for (const event of [...events].reverse()) {
    const value = event.payload.failureKind;
    if (isFailureKind(value)) return value;
  }
  return null;
}

function resultFailureKind(run: RunRecord, command: CommandRecord | null, events: RunEvent[], terminal: TerminalStatus | null): FailureKind | null {
  if (terminal === "completed") return null;
  if (command) return failureKindFromEvents(events);
  return run.failureKind ?? failureKindFromEvents(events);
}

function isFailureKind(value: unknown): value is FailureKind {
  return typeof value === "string" && [
    "cancelled",
    "tenant-policy-denied",
    "secret-unavailable",
    "prompt-unavailable",
    "prompt-too-large",
    "required-skill-unavailable",
    "skill-unavailable",
    "runner-lease-conflict",
    "backend-failed",
    "backend-timeout",
    "backend-response-invalid",
    "thread-resume-failed",
    "provider-auth-failed",
    "provider-invalid-tool-call",
    "provider-compact-unsupported",
    "provider-rate-limited",
    "provider-unavailable",
    "provider-stream-disconnected",
    "provider-refused-retry-recovered",
    "infra-failed",
    "schema-invalid",
  ].includes(value);
}

function messageFromEvents(events: RunEvent[]): string | null {
  for (const event of [...events].reverse()) {
    const value = event.payload.message;
    if (typeof value === "string" && value.length > 0) return value;
  }
  return null;
}

function resultFailureMessage(run: RunRecord, command: CommandRecord | null, events: RunEvent[], terminal: TerminalStatus | null): string | null {
  if (terminal === "completed") return null;
  if (command) return messageFromEvents(events);
  return run.failureMessage ?? messageFromEvents(events);
}

function detailsFromEvents(events: RunEvent[]): JsonRecord | null {
  for (const event of [...events].reverse()) {
    const value = event.payload.details;
    if (typeof value === "object" && value !== null && !Array.isArray(value)) return value as JsonRecord;
  }
  return null;
}

function resultFailureDetails(events: RunEvent[], terminal: TerminalStatus | null): JsonRecord | null {
  return terminal === "completed" ? null : detailsFromEvents(events);
}

function assistantReply(events: RunEvent[]): AssistantReplySummary {
  const assistantEvents = events.filter((event) => event.type === "assistant_message");
  const latestAuthoritative = [...assistantEvents].reverse().find((event) => (event.payload.replyAuthority === true || event.payload.final === true) && textPayload(event.payload).length > 0);
  if (latestAuthoritative) return assistantReplySummary(latestAuthoritative);
  const latestAssistant = [...assistantEvents].reverse().find((event) => textPayload(event.payload).length > 0);
  if (latestAssistant) return assistantReplySummary(latestAssistant);
  return { text: "", seq: null, source: null, final: false, replyAuthority: false, textTruncated: false, outputTruncated: false };
}

function assistantReplySummary(event: RunEvent): AssistantReplySummary {
  return {
    text: textPayload(event.payload),
    seq: event.seq,
    source: typeof event.payload.source === "string" ? event.payload.source : null,
    final: event.payload.final === true,
    replyAuthority: event.payload.replyAuthority === true,
    textTruncated: event.payload.textTruncated === true,
    outputTruncated: event.payload.outputTruncated === true,
  };
}

function textPayload(payload: JsonRecord): string {
  for (const key of ["text", "content", "delta"]) {
    const value = payload[key];
    if (typeof value === "string") return value;
  }
  return "";
}

function artifactSummary(events: RunEvent[]): JsonRecord {
  let commandOutputEvents = 0;
  let diffEvents = 0;
  let toolCallEvents = 0;
  let outputChars = 0;
  let outputBytes = 0;
  let outputTruncatedEvents = 0;
  const streamSummary: Record<string, { events: number; outputBytes: number; outputTruncated: boolean }> = {
    stdout: { events: 0, outputBytes: 0, outputTruncated: false },
    stderr: { events: 0, outputBytes: 0, outputTruncated: false },
  };
  for (const event of events) {
    if (event.type === "command_output") {
      commandOutputEvents += 1;
      const text = textPayload(event.payload);
      outputChars += text.length;
      const bytes = outputBytesFromPayload(event.payload);
      outputBytes += bytes;
      const truncated = outputTruncatedFromPayload(event.payload);
      if (truncated) outputTruncatedEvents += 1;
      const stream = event.payload.stream === "stderr" ? "stderr" : "stdout";
      streamSummary[stream].events += 1;
      streamSummary[stream].outputBytes += bytes;
      streamSummary[stream].outputTruncated ||= truncated;
    }
    if (event.type === "diff") diffEvents += 1;
    if (event.type === "tool_call") toolCallEvents += 1;
  }
  return { commandOutputEvents, diffEvents, toolCallEvents, outputChars, outputBytes, truncatedEvents: outputTruncatedEvents, outputTruncatedEvents, stdoutSummary: streamSummary.stdout, stderrSummary: streamSummary.stderr };
}

function toolCallSummary(events: RunEvent[]): JsonRecord {
  const toolCallEvents = events.filter((event) => event.type === "tool_call");
  const statusCounts: Record<string, number> = {};
  const exitCodeCounts: Record<string, number> = {};
  for (const event of toolCallEvents) {
    const status = typeof event.payload.status === "string" && event.payload.status.length > 0 ? event.payload.status : "unknown";
    statusCounts[status] = (statusCounts[status] ?? 0) + 1;
    const exitCode = normalizedExitCode(event.payload.exitCode);
    if (exitCode !== null) exitCodeCounts[String(exitCode)] = (exitCodeCounts[String(exitCode)] ?? 0) + 1;
  }
  const window = toolCallEvents.slice(-maxToolCallSummaryItems);
  return {
    count: toolCallEvents.length,
    statusCounts,
    exitCodeCounts,
    items: window.map((event) => toolCallItemSummary(event)),
    itemsOmitted: Math.max(0, toolCallEvents.length - window.length),
    itemWindow: "latest",
    valuesPrinted: false,
  };
}

function toolCallItemSummary(event: RunEvent): JsonRecord {
  const payload = event.payload;
  return {
    seq: event.seq,
    createdAt: event.createdAt,
    method: boundedOptionalString(payload.method, toolCallFieldLimitChars),
    toolName: boundedOptionalString(payload.toolName, toolCallFieldLimitChars),
    type: boundedOptionalString(payload.type, toolCallFieldLimitChars),
    itemId: boundedOptionalString(payload.itemId, toolCallFieldLimitChars),
    status: boundedOptionalString(payload.status, toolCallFieldLimitChars),
    exitCode: normalizedExitCode(payload.exitCode),
    processId: boundedOptionalString(payload.processId, toolCallFieldLimitChars),
    cwd: boundedOptionalString(payload.cwd, toolCallFieldLimitChars),
    command: boundedOptionalString(payload.command, toolCallCommandLimitChars),
    commandTruncated: optionalStringTruncated(payload.command, toolCallCommandLimitChars),
    valuesPrinted: false,
  };
}

function boundedOptionalString(value: JsonValue | undefined, limitChars: number): string | null {
  if (typeof value !== "string") return null;
  return boundedTextSummary(value, { limitChars }).text as string;
}

function optionalStringTruncated(value: JsonValue | undefined, limitChars: number): boolean {
  if (typeof value !== "string") return false;
  return boundedTextSummary(value, { limitChars }).outputTruncated === true;
}

function normalizedExitCode(value: JsonValue | undefined): number | null {
  return typeof value === "number" && Number.isFinite(value) ? value : null;
}

function attemptFromEvents(events: RunEvent[]): string | null {
  for (const event of [...events].reverse()) {
    const value = event.payload.attemptId;
    if (typeof value === "string") return value;
  }
  return null;
}

function sessionSummary(run: RunRecord): JsonRecord | null {
  if (!run.sessionRef) return null;
  return {
    sessionId: run.sessionRef.sessionId,
    conversationId: run.sessionRef.conversationId ?? null,
    threadId: run.sessionRef.threadId ?? null,
    expiresAt: run.sessionRef.expiresAt ?? null,
    metadataKeys: Object.keys(run.sessionRef.metadata ?? {}).sort(),
    valuesPrinted: false,
  };
}

function resourceBundleSummary(run: RunRecord, events: RunEvent[]): JsonRecord | null {
  if (!run.resourceBundleRef) return null;
  const materialized = events.find((event) => event.type === "backend_status" && event.payload.phase === "resource-bundle-materialized")?.payload ?? null;
  return {
    kind: run.resourceBundleRef.kind,
    repoUrl: run.resourceBundleRef.repoUrl,
    commitId: run.resourceBundleRef.commitId ?? null,
    ref: run.resourceBundleRef.ref ?? null,
    bundles: {
      count: run.resourceBundleRef.bundles.length,
      items: run.resourceBundleRef.bundles.map((item) => ({ name: item.name ?? null, repoUrl: item.repoUrl ?? run.resourceBundleRef?.repoUrl ?? null, commitId: item.commitId ?? run.resourceBundleRef?.commitId ?? null, ref: item.ref ?? run.resourceBundleRef?.ref ?? null, subpath: item.subpath, targetPath: item.targetPath, valuesPrinted: false })),
      valuesPrinted: false,
    },
    promptRefs: run.resourceBundleRef.promptRefs ? { count: run.resourceBundleRef.promptRefs.length, names: run.resourceBundleRef.promptRefs.map((item) => item.name), required: run.resourceBundleRef.promptRefs.filter((item) => item.required === true).map((item) => item.name), valuesPrinted: false } : { count: 0, names: [], required: [], valuesPrinted: false },
    requiredSkills: run.resourceBundleRef.requiredSkills ? { count: run.resourceBundleRef.requiredSkills.length, names: run.resourceBundleRef.requiredSkills.map((item) => item.name), valuesPrinted: false } : { count: 0, names: [], valuesPrinted: false },
    materialized: materialized as JsonValue,
  };
}