<script setup>
import { userService } from '@/api/userService';
import { formatDate } from '@/utils/date';
import Badge from 'primevue/badge';
import Button from 'primevue/button';
import Column from 'primevue/column';
import ConfirmDialog from 'primevue/confirmdialog';
import DataTable from 'primevue/datatable';
import InputText from 'primevue/inputtext';
import ProgressSpinner from 'primevue/progressspinner';
import Toast from 'primevue/toast';
import { useConfirm } from 'primevue/useconfirm';
import { useToast } from 'primevue/usetoast';
import { onMounted, ref } from 'vue';

const toast = useToast();
const confirm = useConfirm();

const globalFilterValue = ref('');
const loading = ref(false);
const searchTimeout = ref(null);
const filters = ref({
    global: { value: null, matchMode: 'contains' },
    status: { value: null, matchMode: 'equals' }
});

// Table state
const users = ref({
    items: [],
    total: 0,
    page: 1,
    limit: 10
});

// DataTable pagination state
const first = ref(0);
const rows = ref(10);

const fetchUsers = async () => {
    loading.value = true;
    try {
        // Calculate current page from first and rows
        const currentPage = (first.value / rows.value) + 1;
        const response = await userService.getUsers({
            page: currentPage,
            limit: rows.value,
            keyword: globalFilterValue.value
        });
        users.value = response.data;
    } catch (error) {
        console.error('Failed to fetch users:', error);
        toast.add({ severity: 'error', summary: '错误', detail: '加载用户数据失败', life: 3000 });
    } finally {
        loading.value = false;
    }
};

const onPage = (event) => {
    first.value = event.first;
    rows.value = event.rows;
    fetchUsers();
};

const onSearch = (event) => {
    if (searchTimeout.value) {
        clearTimeout(searchTimeout.value);
    }

    searchTimeout.value = setTimeout(() => {
        first.value = 0; // Reset to first page when searching
        fetchUsers();
    }, 300);
};

const handleRecharge = (user) => {
    confirm.require({
        message: `确定要为用户ID ${user.id}： "${user.username}" 充值吗?`,
        header: '确认充值',
        icon: 'pi pi-exclamation-triangle',
        acceptClass: 'p-button-success',
        accept: async () => {
            try {

                const amount = prompt('请输入充值金额（元）：');
                if (!amount) return;
                const amountInCents = Math.floor(parseFloat(amount) * 100);
                if (isNaN(amountInCents) || amountInCents <= 0) {
                    toast.add({ severity: 'error', summary: '错误', detail: '请输入有效的金额', life: 3000 });
                    return;
                }

                await userService.userBalance(user.id, amountInCents);
                toast.add({ severity: 'success', summary: '成功', detail: '用户已充值', life: 3000 });
                fetchUsers();
            } catch (error) {
                console.error('Failed to recharge user:', error);
                toast.add({ severity: 'error', summary: '错误', detail: '充值用户失败', life: 3000 });
            }
        }
    });
};

onMounted(() => {
    fetchUsers();
});
</script>

<template>
    <Toast />
    <ConfirmDialog />

    <div class="w-full">
        <div class="flex justify-between items-center mb-6">
            <h1 class="text-2xl font-semibold text-gray-800">用户列表</h1>
        </div>

        <div class="card">
            <div class="pb-10 flex">
                <InputText v-model="globalFilterValue" placeholder="搜索用户..." class="flex-1" @input="onSearch" />
            </div>

            <DataTable v-model:filters="filters" :value="users.items" :paginator="true" :rows="rows"
                :totalRecords="users.total" :loading="loading" :lazy="true" :first="first" @page="onPage"
                paginatorTemplate="FirstPageLink PrevPageLink PageLinks NextPageLink LastPageLink CurrentPageReport RowsPerPageDropdown"
                :rowsPerPageOptions="[10, 25, 50]"
                currentPageReportTemplate="显示第 {first} 到 {last} 条，共 {totalRecords} 条结果" dataKey="id"
                :globalFilterFields="['username', 'open_id']" stripedRows removableSort class="p-datatable-sm"
                responsiveLayout="scroll">

                <template #empty>
                    <div class="text-center p-4">未找到用户。</div>
                </template>

                <template #loading>
                    <div class="flex flex-col items-center justify-center p-4">
                        <ProgressSpinner style="width:50px;height:50px" />
                        <span class="mt-2">加载用户数据...</span>
                    </div>
                </template>

                <Column field="id" header="ID" sortable></Column>

                <Column field="balance" header="余额" sortable>
                    <template #body="{ data }">
                        ¥{{ (data.balance / 100).toFixed(2) }}
                    </template>
                </Column>

                <Column field="username" header="用户名" sortable>
                    <template #body="{ data }">
                        <div class="flex items-center space-x-3">
                            <div class="avatar">
                                <div class="mask mask-squircle w-12 h-12">
                                    <img :src="data.avatar" :alt="data.username" />
                                </div>
                            </div>
                            <div>
                                <router-link :to="`/users/${data.id}`"
                                    class="font-bold text-blue-600 hover:text-blue-800">
                                    {{ data.username }}
                                </router-link>
                            </div>
                        </div>
                    </template>
                </Column>

                <Column field="open_id" header="OpenID" sortable></Column>

                <Column field="status" header="状态" sortable>
                    <template #body="{ data }">
                        <Badge :value="data.status === 0 ? '活跃' : '禁用'"
                            :severity="data.status === 0 ? 'success' : 'danger'" />
                    </template>
                </Column>

                <Column field="updated_at" header="时间信息" sortable>
                    <template #body="{ data }">
                        <div class="flex flex-col">
                            <span class="text-gray-500">更新: {{ formatDate(data.updated_at) }}</span>
                            <span class="text-gray-400">创建: {{ formatDate(data.created_at) }}</span>
                        </div>
                    </template>
                </Column>

                <Column header="操作" :exportable="false" style="min-width:8rem">
                    <template #body="{ data }">
                        <div class="flex justify-center space-x-2">
                            <Button icon="pi pi-credit-card" rounded text severity="success"
                                @click="handleRecharge(data)" label="充值" />
                        </div>
                    </template>
                </Column>
            </DataTable>
        </div>
    </div>
</template>
