<?php

namespace App\Http\Controllers\Pos;

use App\Http\Controllers\Controller;
use App\Http\Controllers\Pos\Concerns\ScopesToAccount;
use App\Models\PosCustomerDisplay;
use App\Services\Pos\CustomerDisplayService;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Validation\Rule;

class CustomerDisplayController extends Controller
{
    use ScopesToAccount;

    public function __construct(private CustomerDisplayService $displays) {}

    /** Operator: open/link info for the customer-facing screen. */
    public function info(Request $request): JsonResponse
    {
        $location = $this->location($request);
        $display = $this->displays->ensureForLocation($location);

        return response()->json([
            'url' => $this->displays->displayUrl($display),
            'token' => $display->token,
            'phase' => $display->phase,
        ]);
    }

    public function rotate(Request $request): JsonResponse
    {
        $location = $this->location($request);
        $display = $this->displays->rotateToken($this->displays->ensureForLocation($location));

        return response()->json([
            'url' => $this->displays->displayUrl($display),
            'token' => $display->token,
        ]);
    }

    /** Operator: push cart / phase updates from the register. */
    public function push(Request $request): JsonResponse
    {
        $data = $request->validate([
            'phase' => ['nullable', 'string', Rule::in(PosCustomerDisplay::PHASES)],
            'lines' => ['nullable', 'array'],
            'lines.*.name' => ['required_with:lines', 'string', 'max:200'],
            'lines.*.quantity' => ['required_with:lines', 'numeric', 'min:0'],
            'lines.*.unit_price_minor' => ['required_with:lines', 'integer', 'min:0'],
            'lines.*.discount_minor' => ['nullable', 'integer', 'min:0'],
            'lines.*.note' => ['nullable', 'string', 'max:200'],
            'discount_minor' => ['nullable', 'integer', 'min:0'],
            'tax_minor' => ['nullable', 'integer', 'min:0'],
            'customer_name' => ['nullable', 'string', 'max:120'],
            'loyalty' => ['nullable', 'array'],
            'loyalty.points_balance' => ['nullable', 'integer'],
            'loyalty.points_earn' => ['nullable', 'integer'],
            'loyalty.points_redeem' => ['nullable', 'integer'],
            'loyalty.label' => ['nullable', 'string', 'max:120'],
            'payment' => ['nullable', 'array'],
            'tip' => ['nullable', 'array'],
            'signature' => ['nullable', 'array'],
            'receipt' => ['nullable', 'array'],
            'promo' => ['nullable', 'array'],
            'message' => ['nullable', 'string', 'max:500'],
            'sale_reference' => ['nullable', 'string', 'max:64'],
        ]);

        $location = $this->location($request);
        $phase = $data['phase'] ?? null;
        $lines = $data['lines'] ?? null;

        $extras = array_filter([
            'discount_minor' => $data['discount_minor'] ?? null,
            'tax_minor' => $data['tax_minor'] ?? null,
            'customer_name' => $data['customer_name'] ?? null,
            'loyalty' => $data['loyalty'] ?? null,
            'payment' => $data['payment'] ?? null,
            'tip' => $data['tip'] ?? null,
            'signature' => $data['signature'] ?? null,
            'receipt' => $data['receipt'] ?? null,
            'promo' => $data['promo'] ?? null,
            'message' => $data['message'] ?? null,
            'sale_reference' => $data['sale_reference'] ?? null,
        ], fn ($v) => $v !== null);

        if ($phase === PosCustomerDisplay::PHASE_CART || ($lines !== null && $phase === null)) {
            $display = $this->displays->pushCart($location, $lines ?? [], $extras);
        } elseif ($phase !== null) {
            if ($lines !== null) {
                $extras['lines'] = $lines;
            }
            $display = $this->displays->push($location, $phase, $extras);
        } else {
            $display = $this->displays->push($location, PosCustomerDisplay::PHASE_IDLE, $extras);
        }

        return response()->json([
            'ok' => true,
            'phase' => $display->phase,
            'updated_at' => optional($display->last_pushed_at)->toIso8601String(),
        ]);
    }

    /** Operator: read (and optionally clear) the latest customer action (tip, signature, email). */
    public function actions(Request $request): JsonResponse
    {
        $location = $this->location($request);
        $display = $this->displays->ensureForLocation($location);
        $action = $display->customer_action;

        if ($request->boolean('clear') && $action) {
            $this->displays->clearCustomerAction($display);
        }

        return response()->json([
            'action' => $action,
        ]);
    }
}