import React, { useEffect, useState } from 'react';
import { ActionIcon, Button, Group, Modal, Stack, Text, Loader } from '@mantine/core';
import { showErrorMessage } from '~/utils/utils.ts';
import { apiGetPatientsList } from '~/utils/hms_api.ts';
import type { PatientData } from '~/utils/models.ts';
import InfoIcon from 'mdi-react/InfoIcon';
import { iconMStyle } from '~/styles.ts';

// 缓存已加载的患者数据，避免重复请求
const patientCache = new Map<number, PatientData>();

interface PatientInfoDisplayProps {
    patientId: number;
    showIcon?: boolean;
}

export function PatientInfoDisplay({ patientId, showIcon = true }: PatientInfoDisplayProps) {
    const [patientInfo, setPatientInfo] = useState<PatientData | null>(null);
    const [loading, setLoading] = useState(true);
    const [modalOpen, setModalOpen] = useState(false);
    const [initialLoad, setInitialLoad] = useState(true);

    useEffect(() => {
        // 如果已经在缓存中，直接使用缓存数据
        if (patientCache.has(patientId)) {
            setPatientInfo(patientCache.get(patientId) || null);
            setLoading(false);
            setInitialLoad(false);
            return;
        }

        // 否则加载患者数据
        fetchPatientInfo();
    }, [patientId]);

    const fetchPatientInfo = async () => {
        try {
            setLoading(true);
            // 获取所有患者信息，传递-1表示不分页，获取所有患者
            const response = await apiGetPatientsList(-1);
            
            if (response.success) {
                const patients = response.data.patients;
                // 将所有患者添加到缓存
                patients.forEach(patient => {
                    patientCache.set(patient.id, patient);
                });
                
                // 查找当前需要的患者
                const patient = patients.find(p => p.id === patientId);
                
                if (patient) {
                    setPatientInfo(patient);
                } else {
                    console.warn(`Patient with ID ${patientId} not found`);
                }
            } else {
                showErrorMessage(response.message, "Failed to load patient information");
            }
        } catch (error) {
            showErrorMessage("Error loading patient information", "Error");
            console.error("Error fetching patient information:", error);
        } finally {
            setLoading(false);
            setInitialLoad(false);
        }
    };

    const openModal = () => {
        setModalOpen(true);
    };

    const closeModal = () => {
        setModalOpen(false);
    };

    // 初始加载时显示加载状态
    if (initialLoad) {
        return <Loader size="xs" />;
    }

    // 如果无法找到患者信息，显示 ID
    if (!patientInfo) {
        return (
            <Group gap="xs">
                <Text>ID: {patientId}</Text>
                {showIcon && (
                    <ActionIcon 
                        size="sm" 
                        onClick={fetchPatientInfo} 
                        loading={loading}
                        title="Refresh patient information"
                    >
                        <InfoIcon style={iconMStyle} />
                    </ActionIcon>
                )}
            </Group>
        );
    }

    return (
        <>
            <Group gap="xs">
                <Text 
                    style={{ cursor: 'pointer' }} 
                    onClick={openModal}
                    title="Click to view details"
                >
                    {`${patientInfo.title} ${patientInfo.name}`}
                </Text>
                {showIcon && (
                    <ActionIcon 
                        size="sm" 
                        onClick={openModal}
                        title="View patient details"
                    >
                        <InfoIcon style={iconMStyle} />
                    </ActionIcon>
                )}
            </Group>

            <Modal 
                opened={modalOpen} 
                onClose={closeModal}
                title="Patient Information"
                centered
                size="md"
            >
                <Stack gap="md">
                    <Group>
                        <Text fw={500} w={100}>Name:</Text>
                        <Text>{`${patientInfo.title} ${patientInfo.name}`}</Text>
                    </Group>
                    <Group>
                        <Text fw={500} w={100}>Gender:</Text>
                        <Text>{patientInfo.gender}</Text>
                    </Group>
                    <Group>
                        <Text fw={500} w={100}>Birth Date:</Text>
                        <Text>{patientInfo.birth_date}</Text>
                    </Group>
                    <Group>
                        <Text fw={500} w={100}>Email:</Text>
                        <Text>{patientInfo.email}</Text>
                    </Group>
                    <Group>
                        <Text fw={500} w={100}>Phone:</Text>
                        <Text>{patientInfo.phone}</Text>
                    </Group>
                    <Group>
                        <Text fw={500} w={100}>Address:</Text>
                        <Text>{patientInfo.address}</Text>
                    </Group>
                    <Group>
                        <Text fw={500} w={100}>Postcode:</Text>
                        <Text>{patientInfo.postcode}</Text>
                    </Group>

                    <Group justify="flex-end" mt="md">
                        <Button onClick={closeModal}>Close</Button>
                    </Group>
                </Stack>
            </Modal>
        </>
    );
}