<?php

declare(strict_types=1);

namespace App\Http\Resources\Api\V1\Artist;

use App\Enums\Artist\BumaHandledBy;
use App\Models\ArtistEngagement;
use Illuminate\Http\Request;
use Illuminate\Http\Resources\Json\JsonResource;

/**
 * @mixin ArtistEngagement
 *
 * Buma + VAT formulas (RFC v0.2 D26 — must match Session 5 client-side
 * preview):
 *
 *   buma_amount    = fee × buma_percentage / 100
 *                    IFF buma_applicable && buma_handled_by === Organisation
 *                    ELSE 0
 *
 *   vat_grondslag  = fee + (buma_amount IF Organisation handles buma ELSE 0)
 *
 *   vat_amount     = vat_grondslag × vat_percentage / 100  IF vat_applicable
 *                    ELSE 0
 *
 *   total_cost     = fee + buma_amount + vat_amount
 *                  + Σ deal_breakdown[*].amount
 */
final class ArtistEngagementResource extends JsonResource
{
    /**
     * @return array<string, mixed>
     */
    public function toArray(Request $request): array
    {
        $fee = (float) ($this->fee_amount ?? 0);
        $bumaPercentage = (float) ($this->buma_percentage ?? 0);
        $vatPercentage = (float) ($this->vat_percentage ?? 0);

        $bumaAmount = ($this->buma_applicable && $this->buma_handled_by === BumaHandledBy::Organisation)
            ? round($fee * $bumaPercentage / 100, 2)
            : 0.0;

        $vatGrondslag = $fee + (
            $this->buma_handled_by === BumaHandledBy::Organisation
                ? $bumaAmount
                : 0.0
        );

        $vatAmount = $this->vat_applicable
            ? round($vatGrondslag * $vatPercentage / 100, 2)
            : 0.0;

        $breakdownTotal = 0.0;
        foreach ((array) $this->deal_breakdown as $line) {
            if (is_array($line) && isset($line['amount'])) {
                $breakdownTotal += (float) $line['amount'];
            }
        }

        $totalCost = round($fee + $bumaAmount + $vatAmount + $breakdownTotal, 2);

        return [
            'id' => $this->id,
            'organisation_id' => $this->organisation_id,
            'artist_id' => $this->artist_id,
            'event_id' => $this->event_id,
            'artist' => ArtistResource::make($this->whenLoaded('artist')),
            'project_leader_id' => $this->project_leader_id,
            'project_leader' => $this->whenLoaded('projectLeader', fn () => [
                'id' => $this->projectLeader?->id,
                'name' => trim(($this->projectLeader?->first_name ?? '').' '.($this->projectLeader?->last_name ?? '')),
                'email' => $this->projectLeader?->email,
            ]),
            'booking_status' => [
                'value' => $this->booking_status?->value,
                'label' => $this->booking_status?->label(),
            ],
            'fee_amount' => $this->fee_amount,
            'fee_currency' => $this->fee_currency,
            'fee_type' => [
                'value' => $this->fee_type?->value,
                'label' => $this->fee_type?->label(),
            ],
            'buma_applicable' => (bool) $this->buma_applicable,
            'buma_percentage' => $this->buma_percentage,
            'buma_handled_by' => [
                'value' => $this->buma_handled_by?->value,
                'label' => $this->buma_handled_by?->label(),
            ],
            'vat_applicable' => (bool) $this->vat_applicable,
            'vat_percentage' => $this->vat_percentage,
            'deal_breakdown' => $this->deal_breakdown,
            'deposit_percentage' => $this->deposit_percentage,
            'deposit_due_date' => optional($this->deposit_due_date)->toIso8601String(),
            'balance_due_date' => optional($this->balance_due_date)->toIso8601String(),
            'payment_status' => [
                'value' => $this->payment_status?->value,
                'label' => $this->payment_status?->label(),
            ],
            'crew_count' => $this->crew_count,
            'guests_count' => $this->guests_count,
            'requested_at' => optional($this->requested_at)->toIso8601String(),
            'option_expires_at' => optional($this->option_expires_at)->toIso8601String(),
            'advance_open_from' => optional($this->advance_open_from)->toIso8601String(),
            'advance_open_to' => optional($this->advance_open_to)->toIso8601String(),
            'advancing_completed_count' => $this->advancing_completed_count,
            'advancing_total_count' => $this->advancing_total_count,
            'notes' => $this->notes,
            'computed' => [
                'buma_amount' => $bumaAmount,
                'vat_grondslag' => $vatGrondslag,
                'vat_amount' => $vatAmount,
                'breakdown_total' => $breakdownTotal,
                'total_cost' => $totalCost,
            ],
            'performances' => PerformanceResource::collection($this->whenLoaded('performances')),
            'created_at' => optional($this->created_at)->toIso8601String(),
            'updated_at' => optional($this->updated_at)->toIso8601String(),
            'deleted_at' => optional($this->deleted_at)->toIso8601String(),
        ];
    }
}