<?php

declare(strict_types=1);

namespace app\adminapi\logic\tcm;

use app\common\model\tcm\Prescription;
use app\common\model\tcm\Diagnosis;

class PrescriptionLogic
{
    private static $error = '';

    public static function setError(string $msg): void
    {
        self::$error = $msg;
    }

    public static function getError(): string
    {
        return self::$error;
    }

    private static function generateSn(): string
    {
        return 'RX' . date('Ymd') . str_pad((string)mt_rand(1, 9999), 4, '0', STR_PAD_LEFT);
    }

    /**
     * 添加处方
     */
    public static function add(array $params, int $adminId): ?int
    {
        $diagnosis = Diagnosis::find($params['diagnosis_id']);
        if (!$diagnosis) {
            self::setError('诊单不存在');
            return null;
        }

        $herbs = $params['herbs'] ?? [];
        if (empty($herbs) || !is_array($herbs)) {
            self::setError('请添加中药');
            return null;
        }

        foreach ($herbs as $h) {
            if (empty($h['name'])) {
                self::setError('中药名称不能为空');
                return null;
            }
        }

        $sn = self::generateSn();
        while (Prescription::where('sn', $sn)->find()) {
            $sn = self::generateSn();
        }

        $data = [
            'sn' => $sn,
            'diagnosis_id' => (int)$params['diagnosis_id'],
            'appointment_id' => (int)($params['appointment_id'] ?? 0),
            'patient_id' => (int)$diagnosis->patient_id,
            'patient_name' => $params['patient_name'] ?? $diagnosis->patient_name,
            'gender' => (int)($params['gender'] ?? $diagnosis->gender),
            'age' => (int)($params['age'] ?? $diagnosis->age ?? 0),
            'phone' => $params['phone'] ?? $diagnosis->phone ?? '',
            'visit_no' => $params['visit_no'] ?? $sn,
            'prescription_date' => $params['prescription_date'] ?? date('Y-m-d'),
            'pulse' => $params['pulse'] ?? $diagnosis->pulse ?? '',
            'tongue' => $params['tongue'] ?? $diagnosis->tongue_coating ?? '',
            'clinical_diagnosis' => $params['clinical_diagnosis'] ?? '',
            'case_record' => $params['case_record'] ?? null,
            'herbs' => $herbs,
            'dose_count' => (int)($params['dose_count'] ?? 1),
            'dose_unit' => $params['dose_unit'] ?? '剂',
            'usage_instruction' => $params['usage_instruction'] ?? '水煎服一日二次',
            'amount' => (float)($params['amount'] ?? 0),
            'doctor_name' => $params['doctor_name'] ?? '',
            'doctor_signature' => $params['doctor_signature'] ?? '',
            'template_id' => (int)($params['template_id'] ?? 0),
            'creator_id' => $adminId,
        ];

        $prescription = new Prescription();
        $prescription->save($data);
        return (int)$prescription->id;
    }

    /**
     * 处方详情
     */
    public static function detail(int $id): ?array
    {
        $row = Prescription::find($id);
        if (!$row) {
            return null;
        }
        $arr = $row->toArray();
        $arr['gender_desc'] = $arr['gender'] == 1 ? '男' : '女';
        return $arr;
    }

    /**
     * 根据诊单ID获取处方列表
     */
    public static function listByDiagnosis(int $diagnosisId): array
    {
        return Prescription::where('diagnosis_id', $diagnosisId)
            ->whereNull('delete_time')
            ->order('id', 'desc')
            ->select()
            ->toArray();
    }

    /**
     * 根据预约ID获取处方
     */
    public static function getByAppointment(int $appointmentId): ?array
    {
        $row = Prescription::where('appointment_id', $appointmentId)
            ->whereNull('delete_time')
            ->order('id', 'desc')
            ->find();
        return $row ? $row->toArray() : null;
    }

    /**
     * 作废处方
     */
    public static function void(int $id, int $adminId, string $adminName): bool
    {
        $row = Prescription::find($id);
        if (!$row) {
            self::setError('处方不存在');
            return false;
        }
        if ((int)($row->void_status ?? 0) === 1) {
            self::setError('该处方已作废');
            return false;
        }
        $row->void_status = 1;
        $row->void_time = time();
        $row->void_by = $adminId;
        $row->void_by_name = $adminName;
        return $row->save();
    }
}