import React, { useState, useEffect, useRef } from "react";
import { Box, Typography, CircularProgress, Alert, Paper } from "@mui/material";
import { useNavigate, useSearchParams } from "react-router-dom";
import ErrorOutlineIcon from "@mui/icons-material/ErrorOutline";
import { useTimer } from "./hooks/useTimer";
import { useEvaluation } from "./hooks/useEvaluation";
import ErrorDisplay from "../common/ErrorDisplay";

// Messages de simulation pour les documents par défaut avec timing personnalisé
const SIMULATION_MESSAGES = [
  {
    message: "Initializing evaluation environment",
    step: 1,
    totalSteps: 5,
    timing: 0,
  }, // Immédiat
  {
    message: "Finding available model providers",
    step: 2,
    totalSteps: 5,
    timing: 1500,
  }, // Après 1.5s
  {
    message: "Starting evaluation process",
    step: 3,
    totalSteps: 5,
    timing: 3000,
  }, // Après 3s
  { message: "Evaluating models", step: 4, totalSteps: 5, timing: 5000 }, // Après 5s
  {
    message: "Storing evaluation results",
    step: 5,
    totalSteps: 5,
    timing: 7000,
  }, // Après 7s
];

// Durée totale pour rediriger à la fin de la simulation
const TOTAL_SIMULATION_DURATION = 8000; // 8 secondes

const BenchmarkEvaluation = ({ sessionId, isDefaultDocument, onComplete }) => {
  const [searchParams] = useSearchParams();
  const isDefault =
    isDefaultDocument ||
    ["the-bitter-lesson", "hurricane-faq", "pokemon-guide"].includes(sessionId);

  const navigate = useNavigate();
  const simulationTimeoutsRef = useRef([]);

  // États pour la simulation
  const [simulationStep, setSimulationStep] = useState(0);
  const [simulationComplete, setSimulationComplete] = useState(false);

  // Use our custom hooks
  const { formatElapsedTime, stopTimer } = useTimer();
  const {
    error,
    evaluationComplete: realComplete,
    currentStep,
    evaluationStarted,
    startEvaluation,
    currentStepLabel,
    totalSteps,
  } = useEvaluation(sessionId, () => {
    if (onComplete) {
      onComplete();
    }
  });

  // Gérer la simulation pour les documents par défaut
  useEffect(() => {
    // Seulement exécuter pour les documents par défaut et seulement une fois
    if (!isDefault || simulationTimeoutsRef.current.length > 0) return;

    console.log("Starting simulation for default document:", sessionId);

    // Créer des timeouts pour chaque étape avec les timings personnalisés
    for (let i = 1; i < SIMULATION_MESSAGES.length; i++) {
      const messageData = SIMULATION_MESSAGES[i];
      const timeout = setTimeout(() => {
        console.log(`Simulation step ${i + 1}: ${messageData.message}`);
        setSimulationStep(i);
      }, messageData.timing);

      simulationTimeoutsRef.current.push(timeout);
    }

    // Timeout final pour terminer la simulation
    const finalTimeout = setTimeout(() => {
      console.log("Simulation complete, redirecting");
      setSimulationComplete(true);
      if (onComplete) {
        onComplete();
      }
    }, TOTAL_SIMULATION_DURATION);

    simulationTimeoutsRef.current.push(finalTimeout);

    // Nettoyage au démontage
    return () => {
      simulationTimeoutsRef.current.forEach(clearTimeout);
    };
  }, [isDefault, sessionId, onComplete]);

  // Handle automatic redirection when evaluation is complete
  useEffect(() => {
    if (realComplete || simulationComplete) {
      navigate(`/evaluation-display?session=${sessionId}`);
    }
  }, [realComplete, simulationComplete, sessionId, navigate]);

  // Start evaluation if not default and not started
  useEffect(() => {
    if (!isDefault && !evaluationStarted) {
      startEvaluation();
    }
  }, [isDefault, evaluationStarted, startEvaluation]);

  // Stop timer when complete
  useEffect(() => {
    if (realComplete || simulationComplete) {
      stopTimer();
    }
  }, [realComplete, simulationComplete, stopTimer]);

  const isComplete = realComplete || simulationComplete;
  const currentStepInfo = isDefault
    ? `${SIMULATION_MESSAGES[simulationStep].message} (${SIMULATION_MESSAGES[simulationStep].step}/${SIMULATION_MESSAGES[simulationStep].totalSteps})`
    : `${currentStepLabel} (${currentStep + 1}/${totalSteps})`;

  return (
    <Paper
      elevation={3}
      sx={{
        p: 8,
        display: "flex",
        flexDirection: "column",
        alignItems: "center",
        justifyContent: "center",
        minHeight: 200,
        position: "relative",
      }}
    >
      {/* Temps estimé */}
      <Box
        sx={{
          position: "absolute",
          top: 12,
          right: 12,
          backgroundColor: "rgba(0, 0, 0, 0.04)",
          borderRadius: "4px",
          px: 1,
          py: 0.5,
          display: "inline-flex",
          alignItems: "center",
        }}
      >
        <Typography
          variant="caption"
          sx={{
            fontSize: "0.675rem",
            color: "text.secondary",
            fontWeight: 500,
          }}
        >
          Estimated time ~ 1m30s
        </Typography>
      </Box>

      {error ? (
        <ErrorDisplay error={error} />
      ) : (
        <>
          {isComplete ? (
            <Alert severity="success" sx={{ width: "100%", mb: 3 }}>
              Evaluation completed successfully!
            </Alert>
          ) : (
            <>
              <CircularProgress size={60} sx={{ mb: 2 }} />
              <Typography variant="h6" component="div" gutterBottom>
                Benchmark evaluation...
              </Typography>

              {/* Step progress indicator */}
              <Typography variant="body1" color="text.secondary">
                {currentStepInfo}
              </Typography>

              {/* Timer display */}
              <Box
                sx={{
                  display: "flex",
                  alignItems: "center",
                  mt: 1,
                  color: "text.secondary",
                  opacity: 0.5,
                }}
              >
                <Typography variant="body2">{formatElapsedTime()}</Typography>
              </Box>
            </>
          )}
        </>
      )}
    </Paper>
  );
};

export default BenchmarkEvaluation;