"use client";

import { useState, useEffect } from "react";

const STORAGE_KEY_PREFIX = "eval-dim-expanded";

function getStoredExpanded(evaluationId: string, dimensionId: string): boolean | null {
  if (typeof window === "undefined") return null;
  try {
    const raw = localStorage.getItem(`${STORAGE_KEY_PREFIX}-${evaluationId}`);
    if (!raw) return null;
    const obj = JSON.parse(raw) as Record<string, boolean>;
    return obj[dimensionId] ?? null;
  } catch {
    return null;
  }
}

function setStoredExpanded(evaluationId: string, dimensionId: string, expanded: boolean): void {
  if (typeof window === "undefined") return;
  try {
    const key = `${STORAGE_KEY_PREFIX}-${evaluationId}`;
    const raw = localStorage.getItem(key);
    const obj = (raw ? JSON.parse(raw) : {}) as Record<string, boolean>;
    obj[dimensionId] = expanded;
    localStorage.setItem(key, JSON.stringify(obj));
  } catch {
    /* ignore */
  }
}

interface Dimension {
  id: string;
  slug: string;
  title: string;
  rubric: string;
  suggestedQuestions?: string | null;
}

interface DimensionScore {
  score: number | null;
  justification: string | null;
  examplesObserved: string | null;
  confidence: string | null;
  candidateNotes: string | null;
}

interface DimensionCardProps {
  dimension: Dimension;
  score: DimensionScore | null;
  index: number;
  evaluationId?: string;
  onScoreChange: (dimensionId: string, data: Partial<DimensionScore>) => void;
  /** Increment to collapse this card (e.g. from "Tout fermer" button) */
  collapseAllTrigger?: number;
}

function parseRubric(rubric: string): string[] {
  if (rubric === "1-5" || !rubric) return ["1", "2", "3", "4", "5"];
  const labels: string[] = [];
  for (let i = 1; i <= 5; i++) {
    const m = rubric.match(new RegExp(`${i}:([^;]+)`));
    labels.push(m ? m[1].trim() : String(i));
  }
  return labels;
}

function parseQuestions(s: string | null | undefined): string[] {
  if (!s) return [];
  try {
    const arr = JSON.parse(s) as unknown;
    return Array.isArray(arr) ? arr.filter((x): x is string => typeof x === "string") : [];
  } catch {
    return [];
  }
}

const inputClass =
  "w-full rounded border border-zinc-300 dark:border-zinc-600 bg-white dark:bg-zinc-700/80 px-2.5 py-1.5 text-sm text-zinc-900 dark:text-zinc-100 placeholder-zinc-400 dark:placeholder-zinc-500 focus:border-cyan-500 focus:ring-1 focus:ring-cyan-500/30";

export function DimensionCard({ dimension, score, index, evaluationId, onScoreChange, collapseAllTrigger }: DimensionCardProps) {
  const [notes, setNotes] = useState(score?.candidateNotes ?? "");
  const hasQuestions = parseQuestions(dimension.suggestedQuestions).length > 0;
  const [expanded, setExpanded] = useState(hasQuestions);

  useEffect(() => {
    if (evaluationId && typeof window !== "undefined") {
      const stored = getStoredExpanded(evaluationId, dimension.id);
      if (stored !== null) queueMicrotask(() => setExpanded(stored));
    }
  }, [evaluationId, dimension.id]);

  useEffect(() => {
    if (collapseAllTrigger != null && collapseAllTrigger > 0) {
      queueMicrotask(() => setExpanded(false));
      if (evaluationId) setStoredExpanded(evaluationId, dimension.id, false);
    }
  }, [collapseAllTrigger, evaluationId, dimension.id]);

  const toggleExpanded = () => {
    setExpanded((e) => {
      const next = !e;
      if (evaluationId) setStoredExpanded(evaluationId, dimension.id, next);
      return next;
    });
  };
  const currentScore = score?.score ?? null;
  const rubricLabels = parseRubric(dimension.rubric);
  const questions = parseQuestions(dimension.suggestedQuestions);

  return (
    <div className="rounded-lg border border-zinc-200 dark:border-zinc-600 bg-white dark:bg-zinc-800 shadow-sm dark:shadow-none overflow-hidden">
      <button
        type="button"
        onClick={toggleExpanded}
        className="flex w-full items-center justify-between gap-4 px-4 py-3 text-left hover:bg-zinc-50 dark:hover:bg-zinc-700/50 transition-colors"
      >
        <div className="flex items-center gap-3 min-w-0">
          <span className="font-mono text-xs text-zinc-500 tabular-nums w-5">{index + 1}.</span>
          <span className="font-medium text-zinc-800 dark:text-zinc-100 truncate">{dimension.title}</span>
          {currentScore != null && (
            <span
              className={`shrink-0 font-mono text-xs px-1.5 py-0.5 rounded ${
                currentScore <= 2 ? "bg-amber-500/20 text-amber-600 dark:text-amber-400" :
                currentScore >= 4 ? "bg-emerald-500/20 text-emerald-600 dark:text-emerald-400" :
                "bg-zinc-300 dark:bg-zinc-700 text-zinc-700 dark:text-zinc-300"
              }`}
            >
              {currentScore}/5
            </span>
          )}
        </div>
        <span className="text-zinc-500 text-sm">{expanded ? "−" : "+"}</span>
      </button>

      {expanded && (
        <div className="border-t border-zinc-200 dark:border-zinc-600 px-4 py-3 space-y-3">
          {/* Questions suggérées - en premier */}
          {questions.length > 0 && (
            <div className="rounded bg-zinc-50 dark:bg-zinc-700/80 p-2.5">
              <p className="mb-2 text-xs font-medium text-zinc-500">Questions suggérées</p>
              <ol className="list-decimal list-inside space-y-1 text-sm text-zinc-700 dark:text-zinc-200">
                {questions.map((q, i) => (
                  <li key={i}>{q}</li>
                ))}
              </ol>
            </div>
          )}

          {/* Rubric */}
          <div className="rounded bg-zinc-50 dark:bg-zinc-700/80 p-2.5 font-mono text-xs">
            {rubricLabels.map((r, i) => (
              <div key={i} className="text-zinc-600 dark:text-zinc-300">
                <span className="text-cyan-600 dark:text-cyan-500/80">{i + 1}</span> {r}
              </div>
            ))}
          </div>

          {/* Quick score */}
          <div className="flex items-center gap-1">
            <span className="text-xs text-zinc-500 mr-2">Score:</span>
            {[1, 2, 3, 4, 5].map((n) => (
              <button
                key={n}
                type="button"
                onClick={() => onScoreChange(dimension.id, { score: n })}
                className={`w-8 h-8 rounded font-mono text-sm font-medium transition-colors ${
                  currentScore === n
                    ? "bg-cyan-500 text-white"
                    : "bg-zinc-200 dark:bg-zinc-600 text-zinc-600 dark:text-zinc-300 hover:bg-zinc-300 dark:hover:bg-zinc-500 hover:text-zinc-800 dark:hover:text-zinc-100"
                }`}
              >
                {n}
              </button>
            ))}
            {currentScore != null && (
              <button
                type="button"
                onClick={() => onScoreChange(dimension.id, { score: null })}
                className="ml-1 text-xs text-zinc-500 hover:text-zinc-700 dark:hover:text-zinc-300"
              >
                reset
              </button>
            )}
          </div>

          {/* Notes candidat */}
          <div>
            <label className="text-xs text-zinc-500 mb-1 block">Notes candidat</label>
            <textarea
              value={notes}
              onChange={(e) => {
                setNotes(e.target.value);
                onScoreChange(dimension.id, { candidateNotes: e.target.value });
              }}
              rows={2}
              className={inputClass}
              placeholder="Réponses du candidat..."
            />
          </div>

          {/* Justification, exemples, confiance */}
          <div className="grid grid-cols-1 sm:grid-cols-3 gap-2">
            <div>
              <label className="text-xs text-zinc-500">Justification</label>
              <input
                type="text"
                value={score?.justification ?? ""}
                onChange={(e) => onScoreChange(dimension.id, { justification: e.target.value || null })}
                className={inputClass}
                placeholder="Courte..."
              />
            </div>
            <div>
              <label className="text-xs text-zinc-500">Exemples</label>
              <input
                type="text"
                value={score?.examplesObserved ?? ""}
                onChange={(e) => onScoreChange(dimension.id, { examplesObserved: e.target.value || null })}
                className={inputClass}
                placeholder="Concrets..."
              />
            </div>
            <div>
              <label className="text-xs text-zinc-500">Confiance</label>
              <select
                value={score?.confidence ?? ""}
                onChange={(e) => onScoreChange(dimension.id, { confidence: e.target.value || null })}
                className={inputClass}
              >
                <option value="">—</option>
                <option value="low">Faible</option>
                <option value="med">Moyenne</option>
                <option value="high">Haute</option>
              </select>
            </div>
          </div>
        </div>
      )}
    </div>
  );
}