import { AgentOutput } from './agent-runner.js';
import { GroupQueue } from './group-queue.js';
import type { Logger } from 'pino';
import type { AgentTriggerReason } from './agent-error-detection.js';
import { getMoaConfig } from './config.js';
import { createPairedExecutionLifecycle } from './message-agent-executor-paired.js';
import type { PairedTurnIdentity } from './paired-turn-identity.js';
import { executeMessageAgentAttemptLifecycle } from './message-agent-executor-lifecycle.js';
import { runMessageAgentAttempt } from './message-agent-executor-attempt-runner.js';
import { handoffMessageAgentExecutionToCodex } from './message-agent-executor-handoff.js';
import { prepareMessageAgentExecutionTarget } from './message-agent-executor-target.js';
import { collectMoaReferences, formatMoaReferencesForPrompt } from './moa.js';
import { readArbiterPrompt } from './platform-prompts.js';
import { shouldRetryFreshSessionOnAgentFailure } from './session-recovery.js';
import type { AgentType, PairedRoomRole, RegisteredGroup } from './types.js';
import {
  clearCompactRefreshIfUnchanged,
  maybeApplyCompactRefresh,
  type AppliedCompactRefresh,
} from './compact-refresh.js';

// ── Main executor ─────────────────────────────────────────────────

function buildPromptWithCompactRefresh(args: {
  prompt: string;
  sessionFolder: string;
  sessionId?: string;
  role: PairedRoomRole;
}): { effectivePrompt: string; compactRefresh: AppliedCompactRefresh | null } {
  const compactRefresh = maybeApplyCompactRefresh({
    sessionFolder: args.sessionFolder,
    sessionId: args.sessionId,
    role: args.role,
    prompt: args.prompt,
  });
  return {
    effectivePrompt: compactRefresh?.prompt ?? args.prompt,
    compactRefresh,
  };
}

function clearAppliedCompactRefreshAfterSuccess(args: {
  result: 'success' | 'error';
  sessionFolder: string;
  compactRefresh: AppliedCompactRefresh | null;
}): void {
  if (args.result !== 'success' || !args.compactRefresh) return;
  clearCompactRefreshIfUnchanged({
    sessionFolder: args.sessionFolder,
    flag: args.compactRefresh.flag,
  });
}

async function enrichArbiterPromptWithMoa(args: {
  prompt: string;
  enabled: boolean;
  log: Pick<Logger, 'info' | 'warn'>;
}): Promise<string> {
  const moaConfig = getMoaConfig();
  if (!args.enabled || !moaConfig.enabled) return args.prompt;
  args.log.info(
    { models: moaConfig.referenceModels.map((m) => m.name) },
    'MoA: collecting reference opinions before arbiter',
  );
  const systemPrompt =
    readArbiterPrompt(process.cwd()) || 'You are an arbiter.';
  try {
    const references = await collectMoaReferences({
      config: moaConfig,
      systemPrompt,
      contextPrompt: args.prompt,
    });
    const moaSection = formatMoaReferencesForPrompt(references);
    if (!moaSection) return args.prompt;
    args.log.info(
      {
        successCount: references.filter((r) => !r.error).length,
        totalCount: references.length,
      },
      'MoA: injected reference opinions into arbiter prompt',
    );
    return args.prompt + '\n' + moaSection;
  } catch (err) {
    args.log.warn(
      { err, models: moaConfig.referenceModels.map((m) => m.name) },
      'MoA: failed to collect reference opinions; continuing without enrichment',
    );
    return args.prompt;
  }
}

export interface MessageAgentExecutorDeps {
  assistantName: string;
  queue: Pick<GroupQueue, 'registerProcess' | 'enqueueMessageCheck'> &
    Partial<
      Pick<
        GroupQueue,
        'getDirectTerminalDeliveryForRun' | 'getCloseReasonForRun'
      >
    >;
  getRoomBindings: () => Record<string, RegisteredGroup>;
  getSessions: () => Record<string, string>;
  persistSession: (groupFolder: string, sessionId: string) => void;
  clearSession: (groupFolder: string) => void;
}

export async function runAgentForGroup(
  deps: MessageAgentExecutorDeps,
  args: {
    group: RegisteredGroup;
    prompt: string;
    chatJid: string;
    runId: string;
    startSeq?: number | null;
    endSeq?: number | null;
    hasHumanMessage?: boolean;
    forcedRole?: PairedRoomRole;
    forcedAgentType?: AgentType;
    pairedTurnIdentity?: PairedTurnIdentity;
    onOutput?: (output: AgentOutput) => Promise<void>;
  },
): Promise<'success' | 'error'> {
  const { group, prompt, chatJid, runId, startSeq, endSeq, onOutput } = args;
  const isMain = group.isMain === true;
  const preparedExecution = await prepareMessageAgentExecutionTarget(deps, {
    group,
    prompt,
    chatJid,
    runId,
    startSeq,
    endSeq,
    hasHumanMessage: args.hasHumanMessage,
    forcedRole: args.forcedRole,
    forcedAgentType: args.forcedAgentType,
    pairedTurnIdentity: args.pairedTurnIdentity,
  });
  const {
    currentLease,
    activeRole,
    effectiveServiceId,
    effectiveAgentType,
    sessionFolder,
    arbiterMode,
    effectiveGroup,
    isClaudeCodeAgent,
    forceFreshClaudeReviewerSession,
    shouldPersistSession,
    provider,
    memoryBriefing,
    canRetryClaudeCredentials,
    roomRoleContext,
    pairedExecutionContext,
    runtimePairedTurnIdentity,
    log,
    clearRoleSdkSessions,
  } = preparedExecution;
  let currentSessionId = preparedExecution.currentSessionId;

  if (forceFreshClaudeReviewerSession) {
    clearRoleSdkSessions();
  }

  const moaEnrichedPrompt = await enrichArbiterPromptWithMoa({
    prompt,
    enabled: arbiterMode && Boolean(pairedExecutionContext),
    log,
  });

  const { effectivePrompt, compactRefresh } = buildPromptWithCompactRefresh({
    prompt: moaEnrichedPrompt,
    sessionFolder,
    sessionId: currentSessionId,
    role: activeRole,
  });
  const pairedExecutionLifecycle = createPairedExecutionLifecycle({
    pairedExecutionContext,
    pairedTurnIdentity: runtimePairedTurnIdentity,
    completedRole: runtimePairedTurnIdentity?.role ?? activeRole,
    chatJid,
    runId,
    enqueueMessageCheck: () => deps.queue.enqueueMessageCheck(chatJid),
    getDirectTerminalDeliveryText: () =>
      deps.queue.getDirectTerminalDeliveryForRun?.(
        chatJid,
        runId,
        runtimePairedTurnIdentity?.role ?? activeRole,
      ) ?? null,
    getCloseReason: () =>
      deps.queue.getCloseReasonForRun?.(chatJid, runId) ?? null,
    onOutput,
    log,
  });
  const hasDirectTerminalDelivery = (): boolean =>
    !!deps.queue.getDirectTerminalDeliveryForRun?.(
      chatJid,
      runId,
      runtimePairedTurnIdentity?.role ?? activeRole,
    );

  const maybeHandoffToCodex = (
    reason: AgentTriggerReason,
    sawVisibleOutput: boolean,
  ): boolean =>
    isClaudeCodeAgent &&
    handoffMessageAgentExecutionToCodex({
      activeRole,
      effectiveAgentType,
      hasReviewer: currentLease.reviewer_agent_type !== null,
      reason,
      sawVisibleOutput,
      prompt,
      startSeq,
      endSeq,
      chatJid,
      group,
      pairedTurnIdentity: runtimePairedTurnIdentity,
      markDelegated: () => pairedExecutionLifecycle.markDelegated(),
      log,
    });

  const agentInput = {
    prompt: effectivePrompt,
    sessionId: currentSessionId,
    memoryBriefing,
    groupFolder: group.folder,
    chatJid,
    runId,
    isMain,
    assistantName: deps.assistantName,
    roomRoleContext,
  };

  if (pairedExecutionContext?.blockMessage) {
    pairedExecutionLifecycle.updateSummary({
      outputText: pairedExecutionContext.blockMessage,
    });
    log.warn(
      {
        roomRoleServiceId: roomRoleContext?.serviceId,
        roomRole: roomRoleContext?.role,
      },
      'Blocked paired execution before runner start',
    );
    await onOutput?.({
      status: 'success',
      result: null,
      output: {
        visibility: 'public',
        text: pairedExecutionContext.blockMessage,
      },
      phase: 'final',
    });
    pairedExecutionLifecycle.completeImmediately({ status: 'failed' });
    return 'success';
  }

  const runAttempt = (currentProvider: 'claude' | 'codex') =>
    runMessageAgentAttempt({
      provider: currentProvider,
      currentSessionId,
      isClaudeCodeAgent,
      canRetryClaudeCredentials,
      shouldPersistSession,
      effectiveGroup,
      agentInput,
      activeRole,
      effectiveServiceId,
      effectiveAgentType,
      sessionFolder,
      roomRoleContext,
      pairedExecutionContext,
      fallbackWorkspaceDir: group.workDir ?? null,
      onPersistSession: (sessionId) => {
        deps.persistSession(sessionFolder, sessionId);
        currentSessionId = sessionId;
      },
      registerProcess: (proc, processName, ipcDir, options) =>
        deps.queue.registerProcess(chatJid, proc, processName, ipcDir, options),
      onOutput,
      pairedExecutionLifecycle,
      log,
    });

  try {
    const result = await executeMessageAgentAttemptLifecycle({
      provider,
      runAttempt,
      isClaudeCodeAgent,
      canRetryClaudeCredentials,
      clearStoredSession: () => {
        deps.clearSession(sessionFolder);
        currentSessionId = undefined;
      },
      clearRoleSdkSessions,
      sessionFolder,
      maybeHandoffToCodex,
      hasDirectTerminalDelivery,
      pairedExecutionLifecycle,
      shouldRetryFreshSessionOnAgentFailure,
      rotationLogContext: {
        chatJid,
        group: group.name,
        groupFolder: group.folder,
        runId,
      },
      log,
    });
    clearAppliedCompactRefreshAfterSuccess({
      result,
      sessionFolder,
      compactRefresh,
    });
    return result;
  } finally {
    await pairedExecutionLifecycle.asyncFinalize();
  }
}