<?php

namespace common\components;

/**
 * 链科云打印纸张规格（HTML 排版 + dmPaperSize）
 */
class cloudPrintPaperSpec
{
    /** 场景：配送单 */
    const SCENE_DELIVERY_SLIP = 'delivery_slip';
    /** 场景：节日贺卡 */
    const SCENE_GREETING_CARD = 'greeting_card';
    /** 场景：默认 */
    const SCENE_DEFAULT = 'default';

    /**
     * 内置纸张类型（paperType → 链科代码与 HTML @page）
     * dmPaperSize 参考 Windows DMPAPER，具体以打印机参数为准
     */
    protected static function presets()
    {
        return [
            'a4' => [
                'label' => 'A4',
                'dmPaperSize' => 9,
                'pageSize' => 'A4 portrait',
                'pageMargin' => '10mm',
                'contentWidth' => '190mm',
                'cardWidth' => '140mm',
                'cardHeight' => '200mm',
            ],
            'a5' => [
                'label' => 'A5',
                'dmPaperSize' => 11,
                'pageSize' => 'A5 portrait',
                'pageMargin' => '8mm',
                'contentWidth' => '128mm',
                'cardWidth' => '100mm',
                'cardHeight' => '148mm',
            ],
            'b5' => [
                'label' => 'B5',
                'dmPaperSize' => 13,
                'pageSize' => 'B5 portrait',
                'pageMargin' => '8mm',
                'contentWidth' => '176mm',
                'cardWidth' => '120mm',
                'cardHeight' => '170mm',
            ],
            'letter' => [
                'label' => 'Letter',
                'dmPaperSize' => 1,
                'pageSize' => 'letter portrait',
                'pageMargin' => '10mm',
                'contentWidth' => '190mm',
                'cardWidth' => '140mm',
                'cardHeight' => '200mm',
            ],
            // 贺卡常用竖版 10×15cm
            'card_10x15' => [
                'label' => '贺卡10×15cm',
                'dmPaperSize' => 0,
                'pageSize' => '100mm 150mm',
                'pageMargin' => '5mm',
                'contentWidth' => '90mm',
                'cardWidth' => '90mm',
                'cardHeight' => '130mm',
            ],
            // 贺卡竖版 13×18cm
            'card_13x18' => [
                'label' => '贺卡13×18cm',
                'dmPaperSize' => 0,
                'pageSize' => '130mm 180mm',
                'pageMargin' => '6mm',
                'contentWidth' => '118mm',
                'cardWidth' => '118mm',
                'cardHeight' => '160mm',
            ],
        ];
    }

    /**
     * 解析纸张规格
     *
     * @param array $options scene, paperType, paperSize(dmPaperSize 数值优先)
     */
    public static function resolve(array $options = [])
    {
        $scene = (string)($options['scene'] ?? self::SCENE_DEFAULT);
        $paperType = strtolower(trim((string)($options['paperType'] ?? '')));
        $paperSize = intval($options['paperSize'] ?? 0);

        if ($paperType === '') {
            $paperType = strtolower(trim((string)self::envByScene($scene, 'PAPER_TYPE')));
        }
        if ($paperSize <= 0) {
            $paperSize = intval(self::envByScene($scene, 'PAPER_SIZE'));
        }
        if ($paperType === '') {
            $paperType = 'a4';
        }

        $presets = self::presets();
        if (!isset($presets[$paperType])) {
            throw new CloudPrinterApiException('不支持的纸张类型: ' . $paperType);
        }

        $spec = $presets[$paperType];
        $dmPaperSize = $paperSize > 0 ? $paperSize : intval($spec['dmPaperSize']);
        if ($dmPaperSize <= 0) {
            $dmPaperSize = intval(getenv('LIANKENET_PAPER_SIZE') ?: 9);
        }

        return [
            'paperType' => $paperType,
            'label' => $spec['label'],
            'dmPaperSize' => $dmPaperSize,
            'pageSize' => $spec['pageSize'],
            'pageMargin' => $spec['pageMargin'],
            'contentWidth' => $spec['contentWidth'],
            'cardWidth' => $spec['cardWidth'],
            'cardHeight' => $spec['cardHeight'],
        ];
    }

    /**
     * 返回可选纸张类型列表（给前端或配置参考）
     */
    public static function listTypes()
    {
        $list = [];
        foreach (self::presets() as $key => $item) {
            $list[] = [
                'paperType' => $key,
                'label' => $item['label'],
                'defaultDmPaperSize' => $item['dmPaperSize'],
            ];
        }
        return $list;
    }

    /**
     * 按场景读取 .env：LIANKENET_DELIVERY_SLIP_PAPER_TYPE 等
     */
    protected static function envByScene($scene, $suffix)
    {
        $map = [
            self::SCENE_DELIVERY_SLIP => 'LIANKENET_DELIVERY_SLIP_' . $suffix,
            self::SCENE_GREETING_CARD => 'LIANKENET_GREETING_CARD_' . $suffix,
            self::SCENE_DEFAULT => 'LIANKENET_' . $suffix,
        ];
        $key = $map[$scene] ?? $map[self::SCENE_DEFAULT];
        $value = getenv($key);
        if ($value === false || $value === '') {
            if ($scene !== self::SCENE_DEFAULT && $suffix === 'PAPER_TYPE') {
                return getenv('LIANKENET_PAPER_TYPE') ?: '';
            }
            if ($scene !== self::SCENE_DEFAULT && $suffix === 'PAPER_SIZE') {
                return getenv('LIANKENET_PAPER_SIZE') ?: 0;
            }
        }
        return $value;
    }
}