// MilestonesPanel.tsx — Paliers de prestige (Sprint 3)
// Progress bar vers le prochain milestone, claim button, preview reward

import { useGameStore } from "../store/useGameStore";
import { getClaimableMilestones, getNextMilestone } from "../core/economy";
import { PRESTIGE_MILESTONES } from "../data/prestigeMilestones";

export function MilestonesPanel() {
  const state = useGameStore((s) => s.state);
  const claim = useGameStore((s) => s.claimMilestone);

  if (state.prestigeCount < 1) return null;

  const claimable = getClaimableMilestones(state);
  const nextMilestone = getNextMilestone(state);
  const claimed = state.claimedMilestones ?? [];
  const totalClaimed = claimed.length;

  return (
    <div className="gp">
      <div className="flex justify-between items-center">
        <span className="gp-title">Milestones</span>
        <span className="gp-label">{totalClaimed}/{PRESTIGE_MILESTONES.length}</span>
      </div>

      {/* Claimable milestones */}
      {claimable.length > 0 && (
        <div className="flex flex-col gap-1.5">
          {claimable.map((m) => (
            <div key={m.id} className="gp-row gp-row--evolution border-purple-400/30!">
              <div className="flex flex-col min-w-0">
                <span className="gp-value text-[0.7rem]!">{m.name}</span>
                <span className="gp-label">{m.reward.label}</span>
              </div>
              <button
                onClick={() => claim(m.id)}
                className="gp-btn gp-btn--buy"
              >
                Claim
              </button>
            </div>
          ))}
        </div>
      )}

      {/* Progress vers le prochain milestone */}
      {nextMilestone && (
        <div className="flex flex-col gap-1">
          <div className="flex justify-between">
            <span className="gp-label">Prochain : {nextMilestone.name}</span>
            <span className="gp-label">
              {state.prestigeCount}/{nextMilestone.threshold}
            </span>
          </div>
          <div className="gp-progress">
            <div
              className="gp-progress-fill bg-gradient-to-r from-purple-600 to-purple-400"
              style={{
                width: `${Math.min((state.prestigeCount / nextMilestone.threshold) * 100, 100).toFixed(1)}%`,
              }}
            />
          </div>
          <span className="gp-label">{nextMilestone.reward.label}</span>
        </div>
      )}

      {/* Tous les milestones réclamés */}
      {!nextMilestone && claimable.length === 0 && (
        <span className="gp-label text-center gp-accent-purple">
          Tous les milestones reclames !
        </span>
      )}

      {/* Liste compacte des milestones passés */}
      {totalClaimed > 0 && claimable.length === 0 && (
        <div className="flex flex-wrap gap-1 mt-1">
          {PRESTIGE_MILESTONES.filter((m) => claimed.includes(m.id)).map((m) => (
            <span
              key={m.id}
              className="gp-label text-[0.55rem]! px-1.5 py-0.5 rounded bg-purple-500/10 border border-purple-500/20"
              title={`${m.name} — ${m.description}`}
            >
              {m.threshold}
            </span>
          ))}
        </div>
      )}
    </div>
  );
}