<?php

declare(strict_types=1);

namespace Modules\RestaurantDelivery\Services\Earnings;

use Illuminate\Support\Carbon;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Log;
use Modules\RestaurantDelivery\Models\Delivery;
use Modules\RestaurantDelivery\Models\Rider;
use Modules\RestaurantDelivery\Models\RiderBonus;
use Modules\RestaurantDelivery\Models\RiderEarning;
use Modules\RestaurantDelivery\Models\RiderPayout;

class EarningsService
{
    protected array $config;

    public function __construct()
    {
        $this->config = config('restaurant-delivery.earnings');
    }

    /*
    |--------------------------------------------------------------------------
    | Delivery Earnings
    |--------------------------------------------------------------------------
    */

    /**
     * Create earning record for a completed delivery
     */
    public function createDeliveryEarning(Delivery $delivery): ?RiderEarning
    {
        if (! $delivery->rider) {
            return null;
        }

        try {
            $earning = DB::transaction(function () use ($delivery) {
                // Create base earning
                $earning = RiderEarning::createForDelivery($delivery);

                if (! $earning) {
                    return null;
                }

                // Check and apply bonuses
                $this->applyDeliveryBonuses($delivery, $earning);

                // Auto-confirm if configured
                $earning->confirm();

                return $earning;
            });

            Log::info('Delivery earning created', [
                'earning_id' => $earning?->id,
                'delivery_id' => $delivery->id,
                'amount' => $earning?->net_amount,
            ]);

            return $earning;
        } catch (\Exception $e) {
            Log::error('Failed to create delivery earning', [
                'delivery_id' => $delivery->id,
                'error' => $e->getMessage(),
            ]);

            return null;
        }
    }

    /**
     * Apply bonuses to a delivery earning
     */
    protected function applyDeliveryBonuses(Delivery $delivery, RiderEarning $earning): void
    {
        $rider = $delivery->rider;
        $bonuses = $this->config['bonuses'];

        // Peak hour bonus
        if ($bonuses['peak_hour_bonus']['enabled'] && $this->isPeakHour()) {
            $this->createBonus(
                $rider,
                'peak_hour',
                $bonuses['peak_hour_bonus']['amount'],
                'Peak hour bonus',
                $delivery
            );
        }

        // Rating bonus
        if ($bonuses['rating_bonus']['enabled'] && $rider->rating >= $bonuses['rating_bonus']['min_rating']) {
            $this->createBonus(
                $rider,
                'rating',
                $bonuses['rating_bonus']['amount'],
                'High rating bonus',
                $delivery
            );
        }

        // Consecutive delivery bonus
        if ($bonuses['consecutive_delivery_bonus']['enabled']) {
            $consecutiveCount = $this->getConsecutiveDeliveryCount($rider);
            if ($consecutiveCount >= $bonuses['consecutive_delivery_bonus']['threshold']) {
                $this->createBonus(
                    $rider,
                    'consecutive',
                    $bonuses['consecutive_delivery_bonus']['amount'],
                    "Consecutive delivery bonus ({$consecutiveCount} deliveries)",
                    $delivery
                );
            }
        }
    }

    /*
    |--------------------------------------------------------------------------
    | Bonus Management
    |--------------------------------------------------------------------------
    */

    /**
     * Create a bonus earning
     */
    public function createBonus(
        Rider $rider,
        string $bonusType,
        float $amount,
        string $description,
        ?Delivery $delivery = null
    ): RiderEarning {
        return RiderEarning::createBonus($rider, $bonusType, $amount, $description, $delivery);
    }

    /**
     * Check and apply weekly target bonus
     */
    public function checkWeeklyTargetBonus(Rider $rider): ?RiderEarning
    {
        $bonusConfig = $this->config['bonuses']['weekly_target_bonus'];

        if (! $bonusConfig['enabled']) {
            return null;
        }

        $weekStart = now()->startOfWeek();
        $weekEnd = now()->endOfWeek();

        // Get weekly delivery count
        $weeklyDeliveries = $rider->deliveries()
            ->completed()
            ->whereBetween('delivered_at', [$weekStart, $weekEnd])
            ->count();

        // Check if already received bonus this week
        $existingBonus = RiderEarning::where('rider_id', $rider->id)
            ->where('type', 'bonus')
            ->where('sub_type', 'weekly_target')
            ->whereBetween('earning_date', [$weekStart, $weekEnd])
            ->exists();

        if ($existingBonus) {
            return null;
        }

        // Find applicable bonus tier
        $targets = collect($bonusConfig['targets'])->sortByDesc('deliveries');

        foreach ($targets as $target) {
            if ($weeklyDeliveries >= $target['deliveries']) {
                return $this->createBonus(
                    $rider,
                    'weekly_target',
                    $target['bonus'],
                    "Weekly target bonus ({$weeklyDeliveries} deliveries)"
                );
            }
        }

        return null;
    }

    /**
     * Get available bonuses for a rider
     */
    public function getAvailableBonuses(Rider $rider): array
    {
        return RiderBonus::where('is_active', true)
            ->where(function ($q) {
                $q->whereNull('valid_from')
                    ->orWhere('valid_from', '<=', now());
            })
            ->where(function ($q) {
                $q->whereNull('valid_until')
                    ->orWhere('valid_until', '>=', now());
            })
            ->where(function ($q) use ($rider) {
                $q->whereNull('min_rider_rating')
                    ->orWhere('min_rider_rating', '<=', $rider->rating);
            })
            ->get()
            ->filter(fn ($bonus) => $this->riderEligibleForBonus($rider, $bonus))
            ->map(fn ($bonus) => [
                'id' => $bonus->id,
                'name' => $bonus->name,
                'type' => $bonus->type,
                'amount' => $bonus->amount,
                'description' => $bonus->description,
            ])
            ->values()
            ->toArray();
    }

    protected function riderEligibleForBonus(Rider $rider, RiderBonus $bonus): bool
    {
        // Check rider type
        if ($bonus->applicable_rider_types) {
            if (! in_array($rider->type->value, $bonus->applicable_rider_types)) {
                return false;
            }
        }

        // Check zones
        if ($bonus->applicable_zones && $rider->assigned_zones) {
            $intersection = array_intersect($bonus->applicable_zones, $rider->assigned_zones);
            if (empty($intersection)) {
                return false;
            }
        }

        // Check usage limits
        if ($bonus->max_uses_per_rider) {
            $riderUses = RiderEarning::where('rider_id', $rider->id)
                ->where('sub_type', $bonus->code)
                ->count();

            if ($riderUses >= $bonus->max_uses_per_rider) {
                return false;
            }
        }

        return true;
    }

    /*
    |--------------------------------------------------------------------------
    | Penalty Management
    |--------------------------------------------------------------------------
    */

    /**
     * Create a penalty
     */
    public function createPenalty(
        Rider $rider,
        string $penaltyType,
        float $amount,
        string $description,
        ?Delivery $delivery = null
    ): RiderEarning {
        return RiderEarning::createPenalty($rider, $penaltyType, $amount, $description, $delivery);
    }

    /**
     * Apply cancellation penalty
     */
    public function applyCancellationPenalty(Rider $rider, Delivery $delivery): ?RiderEarning
    {
        $penaltyConfig = $this->config['penalties']['cancellation'];

        if (! $penaltyConfig['enabled']) {
            return null;
        }

        // Check free cancellations
        $todayCancellations = RiderEarning::where('rider_id', $rider->id)
            ->where('type', 'penalty')
            ->where('sub_type', 'cancellation')
            ->whereDate('earning_date', now()->toDateString())
            ->count();

        if ($todayCancellations < $penaltyConfig['free_cancellations']) {
            return null;
        }

        return $this->createPenalty(
            $rider,
            'cancellation',
            $penaltyConfig['amount'],
            "Cancellation penalty for delivery #{$delivery->tracking_code}",
            $delivery
        );
    }

    /**
     * Apply late delivery penalty
     */
    public function applyLateDeliveryPenalty(Rider $rider, Delivery $delivery): ?RiderEarning
    {
        $penaltyConfig = $this->config['penalties']['late_delivery'];

        if (! $penaltyConfig['enabled']) {
            return null;
        }

        $delayMinutes = $delivery->getDelayMinutes();

        if (! $delayMinutes || $delayMinutes < $penaltyConfig['threshold']) {
            return null;
        }

        return $this->createPenalty(
            $rider,
            'late_delivery',
            $penaltyConfig['amount'],
            "Late delivery penalty ({$delayMinutes} min late)",
            $delivery
        );
    }

    /*
    |--------------------------------------------------------------------------
    | Payout Management
    |--------------------------------------------------------------------------
    */

    /**
     * Generate payouts for all eligible riders
     */
    public function generatePayouts(string $periodType = 'weekly'): array
    {
        $results = [
            'generated' => 0,
            'skipped' => 0,
            'errors' => 0,
        ];

        // Get period dates
        [$periodStart, $periodEnd] = $this->getPayoutPeriodDates($periodType);

        // Get all active riders
        $riders = Rider::active()->get();

        foreach ($riders as $rider) {
            try {
                $payout = RiderPayout::createForRider($rider, $periodStart, $periodEnd, $periodType);

                if ($payout) {
                    $results['generated']++;
                } else {
                    $results['skipped']++;
                }
            } catch (\Exception $e) {
                $results['errors']++;
                Log::error('Failed to generate payout', [
                    'rider_id' => $rider->id,
                    'error' => $e->getMessage(),
                ]);
            }
        }

        return $results;
    }

    /**
     * Process a payout
     */
    public function processPayout(RiderPayout $payout, array $paymentDetails): bool
    {
        try {
            DB::transaction(function () use ($payout, $paymentDetails) {
                $payout->markAsCompleted(
                    $paymentDetails['reference'],
                    $paymentDetails
                );
            });

            Log::info('Payout processed', [
                'payout_id' => $payout->id,
                'amount' => $payout->net_amount,
                'reference' => $paymentDetails['reference'],
            ]);

            return true;
        } catch (\Exception $e) {
            Log::error('Failed to process payout', [
                'payout_id' => $payout->id,
                'error' => $e->getMessage(),
            ]);

            return false;
        }
    }

    protected function getPayoutPeriodDates(string $periodType): array
    {
        return match ($periodType) {
            'daily' => [
                now()->subDay()->startOfDay(),
                now()->subDay()->endOfDay(),
            ],
            'weekly' => [
                now()->subWeek()->startOfWeek(),
                now()->subWeek()->endOfWeek(),
            ],
            'monthly' => [
                now()->subMonth()->startOfMonth(),
                now()->subMonth()->endOfMonth(),
            ],
            default => [
                now()->subWeek()->startOfWeek(),
                now()->subWeek()->endOfWeek(),
            ],
        };
    }

    /*
    |--------------------------------------------------------------------------
    | Statistics
    |--------------------------------------------------------------------------
    */

    /**
     * Get rider earnings summary
     */
    public function getRiderEarningsSummary(Rider $rider, ?string $period = null): array
    {
        $query = $rider->earnings()->confirmed();

        $startDate = match ($period) {
            'today' => now()->startOfDay(),
            'week' => now()->startOfWeek(),
            'month' => now()->startOfMonth(),
            'year' => now()->startOfYear(),
            default => null,
        };

        if ($startDate) {
            $query->where('earning_date', '>=', $startDate);
        }

        $earnings = $query->get();

        $deliveryEarnings = $earnings->where('type', 'delivery');
        $tips = $earnings->where('type', 'tip');
        $bonuses = $earnings->where('type', 'bonus');
        $penalties = $earnings->where('type', 'penalty');

        return [
            'total_earnings' => $earnings->sum('net_amount'),
            'delivery_earnings' => [
                'amount' => $deliveryEarnings->sum('net_amount'),
                'count' => $deliveryEarnings->count(),
            ],
            'tips' => [
                'amount' => $tips->sum('net_amount'),
                'count' => $tips->count(),
            ],
            'bonuses' => [
                'amount' => $bonuses->sum('net_amount'),
                'count' => $bonuses->count(),
                'breakdown' => $bonuses->groupBy('sub_type')->map->sum('net_amount')->toArray(),
            ],
            'penalties' => [
                'amount' => abs($penalties->sum('net_amount')),
                'count' => $penalties->count(),
            ],
            'pending_payout' => $this->getPendingPayoutAmount($rider),
        ];
    }

    /**
     * Get pending payout amount
     */
    public function getPendingPayoutAmount(Rider $rider): float
    {
        return $rider->earnings()
            ->payable()
            ->sum('net_amount');
    }

    /**
     * Get earnings history
     */
    public function getEarningsHistory(Rider $rider, int $limit = 50, ?string $type = null): array
    {
        $query = $rider->earnings()->confirmed()->orderBy('earning_date', 'desc');

        if ($type) {
            $query->where('type', $type);
        }

        return $query->limit($limit)->get()->map(fn ($earning) => [
            'id' => $earning->uuid,
            'type' => $earning->type,
            'sub_type' => $earning->sub_type,
            'amount' => $earning->net_amount,
            'description' => $earning->description,
            'delivery_code' => $earning->delivery?->tracking_code,
            'date' => $earning->earning_date->format('Y-m-d'),
            'is_paid' => $earning->is_paid,
        ])->toArray();
    }

    /**
     * Get payout history
     */
    public function getPayoutHistory(Rider $rider, int $limit = 20): array
    {
        return $rider->payouts()
            ->orderBy('created_at', 'desc')
            ->limit($limit)
            ->get()
            ->map(fn ($payout) => [
                'id' => $payout->uuid,
                'payout_number' => $payout->payout_number,
                'period' => $payout->period_start->format('M d').' - '.$payout->period_end->format('M d, Y'),
                'amount' => $payout->net_amount,
                'deliveries' => $payout->total_deliveries,
                'status' => $payout->status,
                'payment_method' => $payout->payment_method,
                'paid_at' => $payout->paid_at?->format('Y-m-d H:i'),
            ])
            ->toArray();
    }

    /*
    |--------------------------------------------------------------------------
    | Helper Methods
    |--------------------------------------------------------------------------
    */

    protected function isPeakHour(): bool
    {
        $peakHours = config('restaurant-delivery.pricing.peak_hours.slots', []);
        $now = now();
        $currentDay = $now->dayOfWeekIso;

        foreach ($peakHours as $slot) {
            if (! in_array($currentDay, $slot['days'] ?? [])) {
                continue;
            }

            $start = Carbon::createFromTimeString($slot['start']);
            $end = Carbon::createFromTimeString($slot['end']);

            if ($now->between($start, $end)) {
                return true;
            }
        }

        return false;
    }

    protected function getConsecutiveDeliveryCount(Rider $rider): int
    {
        // Get today's deliveries in chronological order
        $deliveries = $rider->deliveries()
            ->whereDate('delivered_at', now()->toDateString())
            ->orderBy('delivered_at', 'desc')
            ->get();

        $consecutive = 0;

        foreach ($deliveries as $delivery) {
            if ($delivery->isCompleted()) {
                $consecutive++;
            } else {
                break;
            }
        }

        return $consecutive;
    }
}