<?php

namespace App\Services\Game;

use App\Models\Character;
use App\Models\GymSession;

class TrainingService
{
    private const VALID_STATS = ['strength', 'defense', 'speed', 'dexterity'];

    public function train(Character $character, string $stat): array
    {
        if (!in_array($stat, self::VALID_STATS, true)) {
            return ['success' => false, 'message' => 'Invalid stat.', 'stat_value' => 0];
        }

        $energyCost = config('game.gym.energy_cost', 20);
        $dailyCap   = config('game.gym.daily_cap', 5);
        $statGain   = config('game.gym.stat_gain', 1);

        if (!$character->hasEnergy($energyCost)) {
            return [
                'success'    => false,
                'message'    => "Not enough energy ({$energyCost} required).",
                'stat_value' => $character->$stat,
            ];
        }

        $sessionsToday = $this->getSessionsToday($character, $stat);

        if ($sessionsToday >= $dailyCap) {
            return [
                'success'    => false,
                'message'    => "Daily training cap reached for {$stat} ({$dailyCap} sessions).",
                'stat_value' => $character->$stat,
            ];
        }

        // Deduct energy
        $character->consumeEnergy($energyCost);

        // Increment stat
        $character->$stat += $statGain;
        $character->save();

        // Upsert gym_sessions row
        $session = GymSession::firstOrNew([
            'character_id' => $character->id,
            'stat'         => $stat,
        ]);

        if (!$session->reset_date || $session->reset_date->lt(today())) {
            $session->sessions_today = 0;
            $session->reset_date     = today();
        }

        $session->sessions_today += 1;
        $session->save();

        return [
            'success'    => true,
            'message'    => ucfirst($stat) . " increased to {$character->$stat}!",
            'stat_value' => $character->$stat,
        ];
    }

    public function getSessionsToday(Character $character, string $stat): int
    {
        $session = GymSession::where('character_id', $character->id)
            ->where('stat', $stat)
            ->first();

        if (!$session || !$session->reset_date || $session->reset_date->lt(today())) {
            return 0;
        }

        return $session->sessions_today;
    }

    public function getSessionsRemaining(Character $character, string $stat): int
    {
        $cap = config('game.gym.daily_cap', 5);
        return max(0, $cap - $this->getSessionsToday($character, $stat));
    }
}