<?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 $adminId): ?int
    {
        // 如果没有诊单ID，允许直接创建处方模板
        if (!empty($params['diagnosis_id'])) {
            $diagnosis = Diagnosis::find($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,
            'prescription_name' => $params['prescription_name'] ?? '',
            'prescription_type' => $params['prescription_type'] ?? '浓缩水丸',
            'diagnosis_id' => (int)($params['diagnosis_id'] ?? 0),
            'appointment_id' => (int)($params['appointment_id'] ?? 0),
            'patient_id' => (int)($params['patient_id'] ?? 0),
            'patient_name' => $params['patient_name'] ?? '',
            'gender' => (int)($params['gender'] ?? 1),
            'age' => (int)($params['age'] ?? 0),
            'phone' => $params['phone'] ?? '',
            'visit_no' => $params['visit_no'] ?? $sn,
            'prescription_date' => $params['prescription_date'] ?? date('Y-m-d'),
            'pulse' => $params['pulse'] ?? '',
            'pulse_condition' => $params['pulse_condition'] ?? '',
            'tongue' => $params['tongue'] ?? '',
            'tongue_image' => $params['tongue_image'] ?? '',
            'clinical_diagnosis' => $params['clinical_diagnosis'] ?? '',
            'case_record' => $params['case_record'] ?? null,
            'herbs' => $herbs,
            'dose_count' => (int)($params['dose_count'] ?? 1),
            'dose_unit' => $params['dose_unit'] ?? '剂',
            'usage_days' => (int)($params['usage_days'] ?? 7),
            'usage_instruction' => $params['usage_instruction'] ?? '水煎服一日二次',
            'usage_time' => $params['usage_time'] ?? '饭前',
            'usage_way' => $params['usage_way'] ?? '温水送服',
            'dietary_taboo' => is_array($params['dietary_taboo'] ?? null) ? implode(',', $params['dietary_taboo']) : ($params['dietary_taboo'] ?? ''),
            'usage_notes' => $params['usage_notes'] ?? '',
            'amount' => (float)($params['amount'] ?? 0),
            'doctor_name' => $params['doctor_name'] ?? '',
            'doctor_signature' => $params['doctor_signature'] ?? '',
            'template_id' => (int)($params['template_id'] ?? 0),
            'is_shared' => (int)($params['is_shared'] ?? 0),
            'creator_id' => $adminId,
        ];

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

    /**
     * 编辑处方
     */
    public static function edit(array $params, int $adminId): bool
    {
        try {
            $prescription = Prescription::find($params['id']);
            if (!$prescription) {
                self::setError('处方不存在');
                return false;
            }

            // 检查权限：只有创建者或共享的处方才能编辑
            if ($prescription->creator_id != $adminId && $prescription->is_shared != 1) {
                self::setError('无权限编辑此处方');
                return false;
            }

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

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

            $data = [
                'prescription_name' => $params['prescription_name'] ?? $prescription->prescription_name,
                'prescription_type' => $params['prescription_type'] ?? $prescription->prescription_type,
                'patient_name' => $params['patient_name'] ?? $prescription->patient_name,
                'gender' => (int)($params['gender'] ?? $prescription->gender),
                'age' => (int)($params['age'] ?? $prescription->age),
                'visit_no' => $params['visit_no'] ?? $prescription->visit_no,
                'prescription_date' => $params['prescription_date'] ?? $prescription->prescription_date,
                'tongue' => $params['tongue'] ?? $prescription->tongue,
                'tongue_image' => $params['tongue_image'] ?? $prescription->tongue_image,
                'pulse' => $params['pulse'] ?? $prescription->pulse,
                'pulse_condition' => $params['pulse_condition'] ?? $prescription->pulse_condition,
                'clinical_diagnosis' => $params['clinical_diagnosis'] ?? $prescription->clinical_diagnosis,
                'herbs' => $herbs,
                'dose_count' => (int)($params['dose_count'] ?? $prescription->dose_count),
                'dose_unit' => $params['dose_unit'] ?? $prescription->dose_unit,
                'usage_days' => (int)($params['usage_days'] ?? $prescription->usage_days),
                'usage_instruction' => $params['usage_instruction'] ?? $prescription->usage_instruction,
                'usage_time' => $params['usage_time'] ?? $prescription->usage_time,
                'usage_way' => $params['usage_way'] ?? $prescription->usage_way,
                'dietary_taboo' => is_array($params['dietary_taboo'] ?? null) ? implode(',', $params['dietary_taboo']) : ($params['dietary_taboo'] ?? $prescription->dietary_taboo),
                'usage_notes' => $params['usage_notes'] ?? $prescription->usage_notes,
                'doctor_name' => $params['doctor_name'] ?? $prescription->doctor_name,
                'is_shared' => (int)($params['is_shared'] ?? $prescription->is_shared),
            ];

            $prescription->save($data);
            return true;
        } catch (\Exception $e) {
            self::setError($e->getMessage());
            return false;
        }
    }

    /**
     * 删除处方
     */
    public static function delete(int $id): bool
    {
        try {
            $prescription = Prescription::find($id);
            if (!$prescription) {
                self::setError('处方不存在');
                return false;
            }

            $prescription->delete();
            return true;
        } catch (\Exception $e) {
            self::setError($e->getMessage());
            return false;
        }
    }

    /**
     * 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();
    }
}