<?php

namespace App\Console\Commands;

use App\Models\Building;
use App\Models\Character;
use Illuminate\Console\Command;
use Illuminate\Support\Facades\DB;

/**
 * Advances the persistent world without requiring any user online.
 *
 * Decays survival needs, processes sleep/work/study outcomes, pays salaries,
 * progresses construction and runs simple offline AI. Safe to invoke every
 * minute: each character is processed at most once per MIN_TICK_SECONDS.
 */
class CityTick extends Command
{
    /**
     * Minimum seconds between two processed ticks for one character.
     */
    public const MIN_TICK_SECONDS = 50;

    /**
     * The name and signature of the console command.
     *
     * @var string
     */
    protected $signature = 'city:tick';

    /**
     * The console command description.
     *
     * @var string
     */
    protected $description = 'Advance needs, jobs, construction and offline AI for all characters';

    /**
     * Execute the console command.
     */
    public function handle(): int
    {
        $now = now();
        $processed = 0;

        Character::query()->where(function ($q): void {
            $q->whereNull('last_tick_at')
                ->orWhere('last_tick_at', '<', now()->subSeconds(self::MIN_TICK_SECONDS));
        })->chunkById(200, function ($characters) use ($now, &$processed): void {
            foreach ($characters as $character) {
                DB::transaction(function () use ($character, $now): void {
                    $this->tickCharacter($character, $now);
                });
                $processed++;
            }
        });

        Building::query()
            ->where('is_complete', false)
            ->where('build_progress', '<', 100)
            ->chunkById(200, function ($buildings): void {
                foreach ($buildings as $building) {
                    $progress = min(100, (int) $building->build_progress + 10);
                    $building->build_progress = $progress;
                    $building->is_complete = $progress >= 100;

                    if ($building->is_complete && $building->type === Building::TYPE_HOUSE) {
                        $owner = $building->owner;
                        if ($owner && $owner->house_id === null) {
                            $owner->house_id = $building->id;
                            $owner->save();
                        }
                    }

                    $building->save();
                }
            });

        $this->info("Ticked {$processed} characters.");

        return self::SUCCESS;
    }

    /**
     * Apply one simulation step to a single character.
     */
    private function tickCharacter(Character $character, $now): void
    {
        // Auto-release from the hospital once the two-game-day stay ends.
        if ($character->state === Character::STATE_HOSPITAL) {
            if ($character->releaseIfHospitalStayOver()) {
                return;
            }

            // Still admitted: keep resting (mild recovery) and skip other rules.
            $character->energy = min(100, (int) $character->energy + 2);
            $character->hunger = max(0, (int) $character->hunger - 1);
            $character->thirst = max(0, (int) $character->thirst - 1);
            $character->last_tick_at = $now;
            $character->save();

            return;
        }

        $elapsedMin = 1.0;
        if ($character->last_tick_at !== null) {
            $elapsedMin = max(0.5, $character->last_tick_at->diffInMinutes($now));
        }

        // Need decay scales with elapsed time (one "minute" of world time per tick).
        $character->hunger = max(0, (int) $character->hunger - (int) round(0.5 * $elapsedMin));
        $character->thirst = max(0, (int) $character->thirst - (int) round(0.8 * $elapsedMin));

        $starving = $character->hunger <= 0 || $character->thirst <= 0;

        switch ($character->state) {
            case Character::STATE_SLEEPING:
                $character->energy = min(100, (int) $character->energy + (int) round(15 * $elapsedMin));
                if ($character->energy >= 100) {
                    $character->state = Character::STATE_AWAKE;
                }
                break;

            case Character::STATE_WORKING:
                if ($character->job_id !== null) {
                    $salary = (float) ($character->job?->salary ?? 0);
                    $character->money = round((float) $character->money + ($salary / 30) * $elapsedMin, 2);
                }
                $character->energy = max(0, (int) $character->energy - (int) round(1.2 * $elapsedMin));
                break;

            case Character::STATE_STUDYING:
                $character->education = min(100, (int) $character->education + (int) round(0.5 * $elapsedMin));
                $character->energy = max(0, (int) $character->energy - (int) round(0.8 * $elapsedMin));
                break;

            default:
                $drain = $starving ? 0.8 : 0.4;
                $character->energy = max(0, (int) $character->energy - (int) round($drain * $elapsedMin));
                break;
        }

        if ($starving && $character->state === Character::STATE_WORKING) {
            $character->state = Character::STATE_AWAKE;
        }

        // Simple offline AI for characters without a live session.
        if (! $character->is_online) {
            $this->offlineAi($character, $now);
        }

        $character->last_tick_at = $now;
        $character->save();
    }

    /**
     * Decide what an absent character does (sleep, work, or idle).
     */
    private function offlineAi(Character $character, $now): void
    {
        if ($character->state === Character::STATE_SLEEPING) {
            return;
        }

        if ($character->energy < 20 && $character->house_id !== null) {
            $character->state = Character::STATE_SLEEPING;

            return;
        }

        $minutesOfDay = ((int) $now->format('H')) * 60 + (int) $now->format('i');
        $isWorkday = $minutesOfDay >= 480 && $minutesOfDay <= 1080;

        if ($isWorkday && $character->energy > 80 && $character->job_id !== null && $character->state === Character::STATE_AWAKE) {
            $character->state = Character::STATE_WORKING;
        }
    }
}