<script setup lang="ts">
import { ref, computed, onMounted } from 'vue';
import { useAdminLocale } from '../../composables/useAdminLocale';
import api from '../../api';
import { ElMessage } from 'element-plus';
import { formatAmount, formatAmountFull } from '../../utils/format-amount';
import { resolveFormError } from '../../i18n/form-validation';
import { useAuthStore } from '../../stores/auth';
import AgentCreditContext from '../../components/AgentCreditContext.vue';
import {
  snapshotFromAgentRow,
  type AgentCreditAdjustContext,
} from '../../utils/agent-credit-context';
import {
  emptyAgentSubAgentCreateForm,
  buildAgentSubAgentCreatePayload,
  type AgentSubAgentRow,
} from './agent-sub-agent-form';

const { t, localeTag } = useAdminLocale();
const auth = useAuthStore();

const agents = ref<AgentSubAgentRow[]>([]);
const loading = ref(false);
const keyword = ref('');

const profile = ref<{ creditLimit?: string; usedCredit?: string; availableCredit?: string }>({});

const createVisible = ref(false);
const createLoading = ref(false);
const createForm = ref(emptyAgentSubAgentCreateForm());

const creditVisible = ref(false);
const creditLoading = ref(false);
const creditTarget = ref<AgentSubAgentRow | null>(null);
const creditAmount = ref(10000);
const creditRemark = ref('');
const creditContext = ref<AgentCreditAdjustContext | null>(null);

const availableCreditNum = computed(() => {
  const n = Number(profile.value.availableCredit ?? 0);
  return Number.isFinite(n) ? Math.max(0, n) : 0;
});

const createCreditRange = computed(() => ({
  min: 0,
  max: availableCreditNum.value,
}));

const filteredAgents = computed(() => {
  const q = keyword.value.trim().toLowerCase();
  if (!q) return agents.value;
  return agents.value.filter(
    (a) =>
      a.username.toLowerCase().includes(q) ||
      a.userId.includes(q),
  );
});

onMounted(load);

async function load() {
  loading.value = true;
  try {
    const [agentsRes, profileRes] = await Promise.all([
      api.get('/agent/agents'),
      api.get('/agent/profile'),
    ]);
    agents.value = (agentsRes.data.data ?? []) as AgentSubAgentRow[];
    profile.value = profileRes.data.data as typeof profile.value;
  } finally {
    loading.value = false;
  }
}

function openCreate() {
  createForm.value = emptyAgentSubAgentCreateForm();
  createVisible.value = true;
}

async function submitCreate() {
  let payload: ReturnType<typeof buildAgentSubAgentCreatePayload>;
  try {
    payload = buildAgentSubAgentCreatePayload(createForm.value);
  } catch (e) {
    ElMessage.warning(resolveFormError(e, t));
    return;
  }

  if (payload.creditLimit > availableCreditNum.value) {
    ElMessage.warning(t('err.insufficient_credit'));
    return;
  }

  createLoading.value = true;
  const password = createForm.value.password;
  try {
    await api.post('/agent/agents', payload);
    ElMessage.success(t('user.msg.created_with_password', { password }));
    createVisible.value = false;
    load();
  } catch (e: unknown) {
    const err = e as { response?: { data?: { error?: string } } };
    ElMessage.error(err.response?.data?.error ?? t('msg.create_failed'));
  } finally {
    createLoading.value = false;
  }
}

function openCredit(row: AgentSubAgentRow) {
  creditTarget.value = row;
  creditAmount.value = 10000;
  creditRemark.value = '';
  creditContext.value = {
    target: snapshotFromAgentRow(row),
    parent: snapshotFromAgentRow({
      username: auth.user?.username ?? t('credit.context.acting_agent'),
      creditLimit: String(profile.value.creditLimit ?? 0),
      usedCredit: String(profile.value.usedCredit ?? 0),
      availableCredit: String(profile.value.availableCredit ?? 0),
    }),
  };
  creditVisible.value = true;
}

async function submitCredit() {
  if (!creditTarget.value) return;
  if (creditAmount.value === 0) {
    ElMessage.warning(t('msg.credit_zero'));
    return;
  }
  if (creditAmount.value > 0 && creditAmount.value > availableCreditNum.value) {
    ElMessage.warning(t('err.insufficient_credit'));
    return;
  }

  creditLoading.value = true;
  try {
    await api.post(`/agent/agents/${creditTarget.value.userId}/credit`, {
      amount: creditAmount.value,
      requestId: `agent-credit-${creditTarget.value.userId}-${Date.now()}`,
      remark: creditRemark.value.trim() || undefined,
    });
    ElMessage.success(t('msg.credit_adjusted'));
    creditVisible.value = false;
    load();
  } catch (e: unknown) {
    const err = e as { response?: { data?: { error?: string } } };
    ElMessage.error(err.response?.data?.error ?? t('msg.credit_adjust_failed'));
  } finally {
    creditLoading.value = false;
  }
}

function creditLine(row: AgentSubAgentRow) {
  return `${formatAmount(row.creditLimit)} / ${formatAmount(row.usedCredit)} / ${formatAmount(row.availableCredit)}`;
}

function creditLineFull(row: AgentSubAgentRow) {
  return `${formatAmountFull(row.creditLimit)} / ${formatAmountFull(row.usedCredit)} / ${formatAmountFull(row.availableCredit)}`;
}

function formatTime(v: string | null | undefined) {
  if (!v) return '—';
  return new Date(v).toLocaleString(localeTag.value, {
    year: 'numeric',
    month: '2-digit',
    day: '2-digit',
    hour: '2-digit',
    minute: '2-digit',
  });
}

function statusLabel(status: string) {
  const key = `user.status.${status}`;
  const label = t(key);
  return label === key ? status : label;
}
</script>

<template>
  <div class="admin-list-page">
    <div class="page-header">
      <h2 class="page-title">{{ t('page.agent_sub.title') }}</h2>
      <span class="page-desc">{{ t('page.agent_sub.desc') }}</span>
    </div>

    <div class="credit-strip">
      <div class="credit-item">
        <span class="credit-label">{{ t('agent.field.available_credit') }}</span>
        <span class="credit-value c-green">{{ formatAmount(profile.availableCredit) }}</span>
      </div>
      <div class="credit-divider" />
      <div class="credit-item">
        <span class="credit-label">{{ t('agent.field.used_credit') }}</span>
        <span class="credit-value">{{ formatAmount(profile.usedCredit) }}</span>
      </div>
      <div class="credit-divider" />
      <div class="credit-item">
        <span class="credit-label">{{ t('agent.field.credit_limit') }}</span>
        <span class="credit-value">{{ formatAmount(profile.creditLimit) }}</span>
      </div>
    </div>

    <div class="list-chrome">
      <div class="list-chrome__row">
        <el-form inline class="list-chrome__grow">
          <el-form-item :label="t('common.search')">
            <el-input
              v-model="keyword"
              :placeholder="t('agent_portal.search_sub_agent_ph')"
              clearable
              style="width: 200px"
            />
          </el-form-item>
        </el-form>
        <div class="list-chrome__actions">
          <el-button type="primary" @click="openCreate">
            {{ t('agent_portal.create_tier2_btn') }}
          </el-button>
        </div>
      </div>
    </div>

    <section class="data-card">
      <div class="table-wrap">
        <el-table v-loading="loading" :data="filteredAgents" stripe>
          <el-table-column prop="userId" :label="t('common.col_id')" width="72" />
          <el-table-column prop="username" :label="t('user.col.username')" min-width="120" />
          <el-table-column :label="t('agent.col.level')" width="72" align="center">
            <template #default="{ row }">L{{ row.level }}</template>
          </el-table-column>
          <el-table-column :label="t('common.status')" width="88" align="center">
            <template #default="{ row }">
              <el-tag
                :type="row.userStatus === 'ACTIVE' ? 'success' : 'info'"
                size="small"
                effect="plain"
              >
                {{ statusLabel(row.userStatus) }}
              </el-tag>
            </template>
          </el-table-column>
          <el-table-column :label="t('agent.col.credit')" min-width="168" align="right">
            <template #default="{ row }">
              <el-tooltip :content="creditLineFull(row)" placement="top">
                <span class="amount-compact">{{ creditLine(row) }}</span>
              </el-tooltip>
            </template>
          </el-table-column>
          <el-table-column :label="t('agent.col.direct_players')" width="96" align="center">
            <template #default="{ row }">{{ row.directPlayerCount }}</template>
          </el-table-column>
          <el-table-column :label="t('user.col.created')" min-width="148">
            <template #default="{ row }">{{ formatTime(row.createdAt) }}</template>
          </el-table-column>
          <el-table-column :label="t('common.actions')" width="120" align="center" fixed="right">
            <template #default="{ row }">
              <el-button size="small" type="primary" link @click="openCredit(row)">
                {{ t('common.adjust_credit') }}
              </el-button>
            </template>
          </el-table-column>
          <template #empty>
            <div class="empty-hint">{{ t('agent_portal.no_sub_agents') }}</div>
          </template>
        </el-table>
      </div>
    </section>

    <el-dialog
      v-model="createVisible"
      :title="t('agent_portal.create_sub_agent_dialog')"
      width="520px"
      destroy-on-close
    >
      <el-alert
        type="info"
        :closable="false"
        show-icon
        class="create-alert"
        :title="t('agent_portal.credit_available_hint', { amount: formatAmount(profile.availableCredit) })"
      />
      <el-form label-width="100px" class="create-form">
        <el-form-item :label="t('user.col.username')" required>
          <el-input v-model="createForm.username" :placeholder="t('agent_portal.agent_username_ph')" />
        </el-form-item>
        <el-form-item :label="t('user.field.password')" required>
          <el-input v-model="createForm.password" type="text" autocomplete="off" />
        </el-form-item>
        <el-form-item :label="t('user.field.confirm_password')" required>
          <el-input v-model="createForm.confirmPassword" type="text" autocomplete="off" />
        </el-form-item>
        <el-form-item :label="t('agent.field.credit_limit')" required>
          <el-input-number
            v-model="createForm.creditLimit"
            :min="createCreditRange.min"
            :max="createCreditRange.max"
            :step="1000"
            style="width: 100%"
          />
          <div class="field-hint">{{ t('agent_portal.sub_agent_credit_hint') }}</div>
        </el-form-item>
        <el-form-item :label="t('agent.field.cashback_rate')">
          <el-input-number v-model="createForm.cashbackRate" :min="0" :max="1" :step="0.001" :precision="4" style="width: 100%" />
        </el-form-item>
        <el-form-item :label="t('agent.field.max_single_deposit')">
          <el-input-number v-model="createForm.maxSingleDeposit" :min="0" :step="100" style="width: 100%" />
          <div class="field-hint">{{ t('agent.hint.deposit_limit_empty') }}</div>
        </el-form-item>
        <el-form-item :label="t('agent.field.max_daily_deposit')">
          <el-input-number v-model="createForm.maxDailyDeposit" :min="0" :step="1000" style="width: 100%" />
          <div class="field-hint">{{ t('agent.hint.deposit_limit_empty') }}</div>
        </el-form-item>
      </el-form>
      <template #footer>
        <el-button @click="createVisible = false">{{ t('common.cancel') }}</el-button>
        <el-button type="primary" :loading="createLoading" @click="submitCreate">
          {{ t('user.btn.create') }}
        </el-button>
      </template>
    </el-dialog>

    <el-dialog
      v-model="creditVisible"
      :title="t('agent_portal.adjust_credit_dialog', { name: creditTarget?.username ?? '' })"
      width="520px"
      destroy-on-close
    >
      <AgentCreditContext
        :context="creditContext"
        :adjust-amount="creditAmount"
      />
      <el-form label-width="88px">
        <el-form-item :label="t('common.col_id')">
          <span>{{ creditTarget?.userId }}</span>
        </el-form-item>
        <el-form-item :label="t('user.field.amount')">
          <el-input-number
            v-model="creditAmount"
            :step="1000"
            :precision="2"
            style="width: 100%"
          />
          <div class="field-hint">{{ t('agent_portal.credit_adjust_hint') }}</div>
        </el-form-item>
        <el-form-item :label="t('user.field.remark')">
          <el-input v-model="creditRemark" :placeholder="t('common.optional')" />
        </el-form-item>
      </el-form>
      <template #footer>
        <el-button @click="creditVisible = false">{{ t('common.cancel') }}</el-button>
        <el-button type="primary" :loading="creditLoading" @click="submitCredit">
          {{ t('common.confirm') }}
        </el-button>
      </template>
    </el-dialog>
  </div>
</template>

<style scoped>
.page-header {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 20px;
}
.page-title {
  font-size: 20px;
  font-weight: 700;
  color: #e0e0e0;
}
.page-desc {
  font-size: 13px;
  color: #666;
}

.credit-strip {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 14px 18px;
  margin-bottom: 16px;
  border-radius: 12px;
  border: 1px solid #1e1e1e;
  background: linear-gradient(135deg, rgba(30, 30, 30, 0.6), rgba(20, 20, 20, 0.4));
}
.credit-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.credit-label {
  font-size: 12px;
  color: #666;
}
.credit-value {
  font-size: 18px;
  font-weight: 700;
  color: #e0e0e0;
  font-variant-numeric: tabular-nums;
}
.credit-value.c-green {
  color: #67c23a;
}
.credit-divider {
  width: 1px;
  height: 32px;
  background: #2a2a2a;
}

.data-card {
  border-radius: 12px;
  border: 1px solid #1e1e1e;
  overflow: hidden;
}

.amount-compact {
  font-variant-numeric: tabular-nums;
  cursor: default;
}

.create-alert {
  margin-bottom: 16px;
}
.create-form {
  margin-top: 4px;
}
.field-hint {
  margin-top: 6px;
  font-size: 12px;
  color: #666;
  line-height: 1.4;
}
.empty-hint {
  padding: 32px 0;
  color: #666;
  font-size: 13px;
}
</style>
