<script setup lang="ts">
/**
 * Карточка тенанта (drill-down из AdminTenantsView).
 *
 * Sprint 4 Phase B/1 (audit O-refactor-04 хвост): UI-блоки выделены в
 * components/admin/tenant-detail/{TenantDetailHeader,TenantDetailTabs}.vue
 * + composables/adminTenantDetailFormatters.ts. State (tenant, activeTab,
 * impersonationOpen, loadTenant) остаётся в этом view ради
 * `defineExpose`-контракта Vitest тестов.
 *
 * Маршрут: /admin/tenants/:code (params.code = 'TNT-0042').
 *
 * 4 KPI вверху + таб-навигация (Финансы / Пользователи / Проекты / Активность).
 * На API: GET /api/admin/tenants/{code} → AdminTenantDetail с агрегатами.
 */
import { computed, onMounted, ref, watch } from 'vue';
import { useRoute, useRouter } from 'vue-router';
import { getAdminTenantDetail } from '../../api/admin';
import { extractErrorMessage } from '../../api/client';
import { mapAdminTenantDetail } from '../../composables/adminTenantDetailMapper';
import type { AdminTenantDetail } from '../../composables/mockTenantDetail';
import ImpersonationDialog from '../../components/admin/ImpersonationDialog.vue';
import TenantDetailHeader from '../../components/admin/tenant-detail/TenantDetailHeader.vue';
import TenantDetailTabs from '../../components/admin/tenant-detail/TenantDetailTabs.vue';
import TenantBalanceDialog from '../../components/admin/TenantBalanceDialog.vue';

const route = useRoute();
const router = useRouter();

const code = computed(() => String(route.params.code ?? ''));

const tenant = ref<AdminTenantDetail | null>(null);
const loading = ref(false);
const fetchError = ref<string | null>(null);
const notFound = ref(false);

async function loadTenant(): Promise<void> {
    if (code.value === '') return;
    loading.value = true;
    fetchError.value = null;
    notFound.value = false;
    try {
        const data = await getAdminTenantDetail(code.value);
        tenant.value = mapAdminTenantDetail(data);
    } catch (e: unknown) {
        const status = (e as { response?: { status?: number } })?.response?.status;
        if (status === 404) {
            notFound.value = true;
            tenant.value = null;
        } else {
            fetchError.value = extractErrorMessage(e);
        }
    } finally {
        loading.value = false;
    }
}

onMounted(() => {
    void loadTenant();
});

watch(code, () => {
    void loadTenant();
});

const ADMIN_USER_ID = 1;
const impersonationOpen = ref(false);
const balanceDialogOpen = ref(false);

const activeTab = ref<'finance' | 'users' | 'projects' | 'activity'>('finance');

function goBack() {
    router.push({ name: 'admin-tenants' });
}

async function onBalanceSaved(): Promise<void> {
    await loadTenant();
}

defineExpose({ tenant, activeTab, impersonationOpen, balanceDialogOpen, loadTenant });
</script>

<template>
    <v-container v-if="tenant" fluid class="tenant-detail pa-6">
        <TenantDetailHeader
            :tenant="tenant"
            @back="goBack"
            @impersonate="impersonationOpen = true"
            @edit-balance="balanceDialogOpen = true"
        />
        <TenantDetailTabs :tenant="tenant" :active-tab="activeTab" @update:active-tab="activeTab = $event" />
        <ImpersonationDialog v-model="impersonationOpen" :tenant="tenant" :requested-by="ADMIN_USER_ID" />
        <TenantBalanceDialog
            v-model="balanceDialogOpen"
            :tenant-id="tenant.id"
            :tenant-name="tenant.name"
            :current-balance-rub="tenant.balanceRub"
            @saved="onBalanceSaved"
        />
    </v-container>

    <v-container v-else-if="loading" fluid class="pa-6" data-testid="tenant-loading">
        <v-progress-circular indeterminate color="primary" />
        <span class="ml-3 text-medium-emphasis">Загрузка…</span>
    </v-container>

    <v-container v-else-if="notFound" fluid class="pa-6" data-testid="tenant-not-found">
        <v-alert type="error" variant="tonal" class="mb-4">
            Тенант с кодом <strong>{{ code }}</strong> не найден.
        </v-alert>
        <v-btn variant="outlined" prepend-icon="mdi-arrow-left" @click="goBack">К списку тенантов</v-btn>
    </v-container>

    <v-container v-else-if="fetchError" fluid class="pa-6" data-testid="tenant-fetch-error">
        <v-alert type="warning" variant="tonal" class="mb-4"> Не удалось загрузить тенанта: {{ fetchError }} </v-alert>
        <div class="d-flex ga-2">
            <v-btn variant="outlined" prepend-icon="mdi-refresh" @click="loadTenant">Повторить</v-btn>
            <v-btn variant="text" prepend-icon="mdi-arrow-left" @click="goBack">К списку</v-btn>
        </div>
    </v-container>
</template>

<style scoped>
.tenant-detail {
    max-width: 1440px;
}
</style>
