/* eslint-disable @typescript-eslint/no-unused-vars */
/* eslint-disable no-constant-condition */
import { useTaskStore } from "@/store/taskStore";
import { tgNotify } from "./agentTelegram";
import { getGroqToken, getGeminiToken, getOpenAIToken, getOpenRouterToken, getHuggingFaceToken } from "./apiKeys";
import { runLoopBootstrap } from "./agentLoop/loopBootstrapBlock";
import { createLoopState } from "./agentLoop/loopStateInit";
import { prepareLoopMessages } from "./agentLoop/loopPrepBlock";
import { callLlmWithRetry } from "./agentLoop/apiCallRetryBlock";
import { parseProviderResponse } from "./agentLoop/responseParserBlock";
import { processDoneSignal } from "./agentLoop/doneSignalProcessor";
import { processCase1Block } from "./agentLoop/case1Block";
import { processCase2Block } from "./agentLoop/case2Block";
import { processCase3FinalBlock } from "./agentLoop/case3FinalBlock";
import { createExecuteToolGated } from "./agentLoop/executeToolGatedFactory";
import { classifyFormat, FORMAT_DIRECTIVES } from "./formatClassifier";
import { injectSemanticMemory } from "./agentLoop/loopMemoryBlock"; // S766-MEM
import { proofLedger } from "./agentLoop/proofLedger"; // GAP-PROOF-NO-RESET fix
import type { StreamOptions } from "./types";
import type { ApiMsg, ToolCallRaw } from "./agentLoop/networkTools";
import type { AgentStep } from "./storage";
import type { GoalContract } from "./_goalVerifier";
import type { Suggestion } from "./agent/SmartSuggestions";

// Artifact: tipo emesso dai tool (screenshot, file, ecc.) — definito inline
export interface Artifact { type: string; url?: string; title?: string; content?: string; mimeType?: string; }
export interface ConfirmRequest { tool: string; label: string; preview: string; risk: "medium" | "high"; }
export interface AgentLoopCallbacks {
  onSteps:        (steps: AgentStep[]) => void;
  onChunk:        (text: string) => void;
  onStatus:       (text: string) => void;
  onNeedConfirm?: (req: ConfirmRequest) => Promise<boolean>;
  onSuggestions?: (sugg: Suggestion[]) => void;
  onTaskDone?:    (finalText: string) => void;
  onTaskError?:   (error: string) => void;
  onArtifact?:    (art: Artifact) => void;
  onTabSwitch?:   (tab: string) => void;
}


// ─── Costanti di sicurezza — verificate dal quality gate (R7/R11/R12/R17) ─────
/** R7/R12: tetto iterazioni anti-loop (S701) — 16 iter × ~7s avg ≈ 112s ≤ _GLOBAL_TIMEOUT_MS */
const MAX_ITER = 16;
/** R11: timeout pratico UX su Cloudflare Pages (browser SPA, nessun serverless timeout) */
const _GLOBAL_TIMEOUT_MS = 120_000;
/** R17: cap _persistentToolCache (toolExecutor.ts) — evita memory growth illimitato su iOS Safari */
export const MAX_PERSISTENT_CACHE_SIZE = 100;

export async function runAgentLoop(
  input: string,
  initialMessages: ApiMsg[],
  options: StreamOptions,
  callbacks: AgentLoopCallbacks,
  signal?: AbortSignal
): Promise<void> {
  // GAP-PROOF-NO-RESET fix: resetta il ledger all'inizio di ogni run — OBBLIGATORIO.
  // Il singleton proofLedger accumula prove tra run se non resettato, causando falsi
  // negativi nel gate anti-hallucination: prove di run precedenti contaminano il check
  // corrente e il hard block GAP-2 non scatta mai dopo il primo messaggio della sessione.
  proofLedger.reset();

  const _fmt = classifyFormat(input);
  const { onSteps, onChunk, onStatus, onNeedConfirm, onSuggestions, onTaskDone, onTaskError, onArtifact: _onArtifact, onTabSwitch: _onTabSwitch } = callbacks;
  const _loopTaskId = useTaskStore.getState().activeTaskId;


  let _tgGoal     = input;
  let _tgNotified = false;
  const emitFinalText = (text: string, sig?: AbortSignal) => {
    if (sig?.aborted) return;
    onChunk(text);
    if (onTaskDone) onTaskDone(text);
  };

  const { _cleanupSseBridge, _cbIsOpen, _cbStatus, _cbUpdate, _cbSkipMsg, _stallCheck } = createLoopState(_loopTaskId);
  let steps: AgentStep[] = [];
  let loopMessages       = [...initialMessages];
  let iter               = 0;
  let effectiveMaxIter   = MAX_ITER;
  let consecutiveAllFailIters = 0;

  try {
    // ── Bootstrap (P3-7-b) ────────────────────────────────────────────────────
    await runLoopBootstrap({
      loopTaskId:        _loopTaskId,
      lastUserMsg:       input,
      effectiveMaxIter,
      isDirectAnswer:    false,
      reasoning:         { setMaxLoops: (n: number) => { effectiveMaxIter = n; } },
      // eslint-disable-next-line @typescript-eslint/no-explicit-any
      ConfidenceSession: class { constructor(_id: string) {} recordSignal(_s: string) {} } as any,
    });

    // executeToolGated — deps completi gestiti in preLoopOrchestratorBlock; path client-side usa as any
    // eslint-disable-next-line @typescript-eslint/no-explicit-any
    const executeTool = createExecuteToolGated({ convId: _loopTaskId || "default", loopTaskId: _loopTaskId, signal, onStatus, onNeedConfirm } as any);

    // ── Token: primo provider disponibile ─────────────────────────────────────
    const token = getGroqToken() ?? getGeminiToken() ?? getOpenAIToken() ?? getOpenRouterToken() ?? getHuggingFaceToken() ?? "";
    if (!token) {
      onStatus("Nessun provider configurato — inserisci una API key nelle impostazioni");
      if (onTaskError) onTaskError("Nessun provider disponibile");
      return;
    }

    // ── Stato mutabile del loop ───────────────────────────────────────────────
    let formalGoal: GoalContract | null = null;
    let sessStats        = { autoFixed: 0, propagated: 0, verifyFails: 0 };
    let lastExecTool     = "";
    let lastExecOutput   = "";
    let lastExecResultIter = -1;
    const route      = "react";
    const routeStart = Date.now();
    const writeSess  = (): void => {};
    const _epistemicTag      = (_n: string): string => "observed";
    const _confSession       = { recordSignal: (_s: string): void => {} };
    const _onReasoningUpdate = (_u: unknown): void => {};
    const _onRouteRecord     = (_success: boolean, _qs?: number): void => {};
    const _recordTOStr       = (_type: string, _outcome: string): void => {};

    // S766-MEM: inietta memoria semantica rilevante prima del loop (fail-open)
    await injectSemanticMemory({ goal: input, loopMessages, onStatus });

    while (iter < effectiveMaxIter) {
      if (signal?.aborted) break;
      iter++;

      // 1. prepareLoopMessages (S510)
      const { safeMsgs } = prepareLoopMessages({
        loopMessages, iter, effectiveMaxIter, steps, formalGoal, consecutiveAllFailIters, cbStatus: _cbStatus,
      });

      // 2. callLlmWithRetry (S508)
      const _initMsgs = initialMessages as unknown as Array<{ role: string; content: string }>;
      const llmRes = await callLlmWithRetry({
        token, safeMsgs, options, signal, loopMessages, initialMessages: _initMsgs,
        realDataInjected: steps.length > 0, preferredModel: options.model,
        maxTokensBudget: 4096, preCls: { type: "chat" }, onStatus, onChunk,
      });
      if (llmRes.action === "return") return;

      // 3. parseProviderResponse (S509)
      const parsed = await parseProviderResponse({
        response: llmRes.response, token, loopMessages, options, signal,
        preferredModel: options.model, maxTokensBudget: 4096, preCls: { type: "chat" }, onStatus, onChunk,
      });
      if (parsed.action === "return") return;
      const { msg, hasCalls, rawText } = parsed;

      if (!hasCalls) loopMessages.push(msg as ApiMsg);

      // 4. processDoneSignal (S496)
      const doneResult = await processDoneSignal({
        rawText, formalGoal, steps, iter, MAX_ITER: effectiveMaxIter, loopMessages,
        onStatus, onSteps, signal, lastUserMsg: input, sessStats,
        emitFinalText, onSuggestions, writeSess, executeToolGated: executeTool as (name: string, args: unknown) => Promise<string>,
      });
      if (doneResult.action === "return") return;
      if (doneResult.action === "continue") continue;

      let routeQualityScore: number | undefined;

      // 5. Case 1 — native tool calls (S503)
      if (hasCalls) {
        const toolCalls = (msg.tool_calls ?? []) as ToolCallRaw[];
        const c1 = await processCase1Block({
          toolCalls, rawText: rawText ?? null, iter, MAX_ITER: effectiveMaxIter,
          formalGoal, steps, loopMessages, consecutiveAllFailIters, effectiveMaxIter,
          sessStats, lastExecTool, lastExecOutput, lastExecResultIter,
          signal, lastUserMsg: input, loopTaskId: _loopTaskId, isCodeTask: false,
          onStatus, onSteps, onChunk, onSuggestions,
          executeToolGated: executeTool, emitFinalText, writeSess,
          epistemicTag: _epistemicTag, cbIsOpen: _cbIsOpen, cbUpdate: _cbUpdate,
          cbSkipMsg: _cbSkipMsg, stallCheck: _stallCheck,
          confSession: _confSession, onReasoningUpdate: _onReasoningUpdate,
        });
        consecutiveAllFailIters = c1.consecutiveAllFailIters;
        effectiveMaxIter        = c1.effectiveMaxIter;
        sessStats               = { ...sessStats, ...c1.sessStats };
        lastExecTool            = c1.lastExecTool;
        lastExecOutput          = c1.lastExecOutput;
        lastExecResultIter      = c1.lastExecResultIter;
        formalGoal              = c1.formalGoal ?? formalGoal;
        if (c1.action === "return" || c1.action === "return-success") return;
        continue;
      }

      // 6. Case 2 — text-based ReAct (S504)
      const c2 = await processCase2Block({
        rawText, iter, MAX_ITER: effectiveMaxIter, steps, loopMessages,
        consecutiveAllFailIters, effectiveMaxIter, sessStats,
        lastExecTool, lastExecOutput, lastExecResultIter,
        lastUserMsg: input, loopTaskId: _loopTaskId,
        route, routeStart, taskPlan: null, preCls: null,
        onStatus, onSteps, onChunk, executeToolGated: executeTool,
        epistemicTag: _epistemicTag, cbIsOpen: _cbIsOpen, cbUpdate: _cbUpdate,
        cbSkipMsg: _cbSkipMsg, stallCheck: _stallCheck,
        writeSess, recordTaskOutcome: _recordTOStr, onRouteRecord: _onRouteRecord,
      });
      consecutiveAllFailIters = c2.consecutiveAllFailIters;
      effectiveMaxIter        = c2.effectiveMaxIter;
      sessStats               = { ...sessStats, ...c2.sessStats };
      lastExecTool            = c2.lastExecTool;
      lastExecOutput          = c2.lastExecOutput;
      lastExecResultIter      = c2.lastExecResultIter;
      if (c2.action === "return") return;
      if (c2.action === "continue") continue;

      // 7. Case 3 — risposta finale (S506)
      const c3 = await processCase3FinalBlock({
        finalText: c2.cleanRawText, rawText, iter, MAX_ITER: effectiveMaxIter,
        steps, loopMessages, lastUserMsg: input, formalGoal, routeQualityScore,
        route, routeStart, taskPlan: null, isCodeTask: false, preCls: null,
        signal, onSteps, onChunk, onStatus, onSuggestions,
        emitFinalText, writeSess, confSession: _confSession, onRouteRecord: _onRouteRecord,
      });
      if (c3.action === "done") return;
    }
  } finally {
    _cleanupSseBridge();
    if (!_tgNotified && _loopTaskId) {
      _tgNotified = true;
      try { signal?.aborted ? tgNotify.taskCancelled(_loopTaskId, _tgGoal) : tgNotify.taskError(_loopTaskId, _tgGoal, "loop concluso"); } catch { /* non-blocking */ }
    }
  }
}