<script setup lang="ts">
import { ref, onMounted } from 'vue';
import { useRouter } from 'vue-router';
import { ElMessage, ElMessageBox } from 'element-plus';
import { useAdminLocale } from '../../composables/useAdminLocale';
import { usePermissions } from '../../composables/usePermissions';
import { AdminPerm } from '../../constants/permissions';
import api from '../../api';
import { clearStaffSession } from '../../stores/auth';
import AdminSubNav from '../../components/AdminSubNav.vue';
import RatePercentInput from '../../components/RatePercentInput.vue';
import { percentToDecimalRate, decimalRateToPercent } from '../../utils/rate-percent';

defineOptions({ name: 'AdminGlobalSettingsView' });

const { t } = useAdminLocale();
const router = useRouter();
const { hasPermission } = usePermissions();
const canManageSettings = hasPermission(AdminPerm.settings);

const playerSettings = ref({ allowPasswordChange: true, allowUsernameChange: false });
const bettingLimits = ref({
  minStake: 1,
  maxStakeSingle: 50000,
  maxStakeParlay: 20000,
  maxPayoutSingle: 500000,
  maxPayoutParlay: 1000000,
  dailyStakeLimit: 200000,
});
const hierarchySettings = ref({ maxAgentLevel: 0 });
const platformDirectRate = ref(0);
const adminInviteRate = ref(0);
const resetAllowed = ref(false);
const resetConfirmPhrase = ref('');

const settingsSaving = ref(false);
const limitsSaving = ref(false);
const hierarchySaving = ref(false);
const platformDirectSaving = ref(false);
const resetLoading = ref(false);
const loading = ref(false);

async function loadSettings() {
  loading.value = true;
  try {
    const { data } = await api.get('/admin/users/page-init');
    const payload = data.data as {
      playerSettings?: typeof playerSettings.value;
      bettingLimits?: typeof bettingLimits.value;
      hierarchySettings?: { maxAgentLevel: number };
      platformDirect?: { platformDirectRate?: number | string; adminInviteRate?: number | string };
    };
    if (payload.playerSettings) playerSettings.value = payload.playerSettings;
    if (payload.bettingLimits) bettingLimits.value = payload.bettingLimits;
    if (payload.hierarchySettings) {
      hierarchySettings.value = {
        maxAgentLevel: payload.hierarchySettings.maxAgentLevel ?? 0,
      };
    }
    if (payload.platformDirect) {
      platformDirectRate.value = decimalRateToPercent(payload.platformDirect.platformDirectRate ?? 0);
      adminInviteRate.value = decimalRateToPercent(
        payload.platformDirect.adminInviteRate ?? payload.platformDirect.platformDirectRate ?? 0,
      );
    }
  } catch {
    /* keep defaults */
  } finally {
    loading.value = false;
  }
}

async function loadResetDatabaseStatus() {
  try {
    const { data } = await api.get('/admin/system/reset-database');
    resetAllowed.value = !!data.data?.allowed;
  } catch {
    resetAllowed.value = false;
  }
}

async function savePlayerSettings() {
  settingsSaving.value = true;
  try {
    const { data } = await api.put('/admin/users/settings/account', playerSettings.value);
    playerSettings.value = data.data;
    ElMessage.success(t('msg.saved'));
  } catch (e: unknown) {
    const err = e as { response?: { data?: { error?: string } } };
    ElMessage.error(err.response?.data?.error ?? t('msg.save_failed'));
  } finally {
    settingsSaving.value = false;
  }
}

async function saveHierarchySettings() {
  hierarchySaving.value = true;
  try {
    const { data } = await api.put('/admin/agents/settings/hierarchy', hierarchySettings.value);
    hierarchySettings.value = { maxAgentLevel: data.data?.maxAgentLevel ?? hierarchySettings.value.maxAgentLevel };
    ElMessage.success(t('msg.saved'));
  } catch (e: unknown) {
    const err = e as { response?: { data?: { error?: string } } };
    ElMessage.error(err.response?.data?.error ?? t('msg.save_failed'));
  } finally {
    hierarchySaving.value = false;
  }
}

async function savePlatformDirectSettings() {
  platformDirectSaving.value = true;
  try {
    const { data } = await api.put('/admin/settings/cashback/platform-direct', {
      platformDirectRate: percentToDecimalRate(platformDirectRate.value),
      adminInviteRate: percentToDecimalRate(adminInviteRate.value),
    });
    const payload = data.data as { platformDirectRate?: number | string; adminInviteRate?: number | string };
    platformDirectRate.value = decimalRateToPercent(payload?.platformDirectRate ?? 0);
    adminInviteRate.value = decimalRateToPercent(payload?.adminInviteRate ?? payload?.platformDirectRate ?? 0);
    ElMessage.success(t('msg.saved'));
  } catch (e: unknown) {
    const err = e as { response?: { data?: { error?: string } } };
    ElMessage.error(err.response?.data?.error ?? t('msg.save_failed'));
  } finally {
    platformDirectSaving.value = false;
  }
}

async function saveBettingLimits() {
  limitsSaving.value = true;
  try {
    const { data } = await api.put('/admin/settings/betting-limits', bettingLimits.value);
    bettingLimits.value = data.data;
    ElMessage.success(t('msg.saved'));
  } catch (e: unknown) {
    const err = e as { response?: { data?: { error?: string } } };
    ElMessage.error(err.response?.data?.error ?? t('msg.save_failed'));
  } finally {
    limitsSaving.value = false;
  }
}

async function resetDatabase() {
  if (resetConfirmPhrase.value !== 'RESET') {
    ElMessage.warning(t('user.reset_database_confirm_label'));
    return;
  }
  try {
    await ElMessageBox.confirm(t('user.reset_database_hint'), t('user.reset_database'), {
      type: 'warning',
      confirmButtonText: t('user.reset_database_btn'),
      cancelButtonText: t('common.cancel'),
    });
  } catch {
    return;
  }
  resetLoading.value = true;
  try {
    const { data } = await api.post('/admin/system/reset-database', { confirmPhrase: 'RESET' });
    const accounts: string[] = data.data?.demoAccounts ?? [];
    ElMessage.success({
      message: `${t('user.reset_database_success')}\n${t('user.reset_database_accounts')}: ${accounts.join(' · ')}`,
      duration: 8000,
    });
    clearStaffSession();
    await router.push('/login');
  } catch (e: unknown) {
    const err = e as { response?: { data?: { error?: string } } };
    ElMessage.error(err.response?.data?.error ?? t('msg.save_failed'));
  } finally {
    resetLoading.value = false;
  }
}

onMounted(() => {
  if (!canManageSettings) {
    void router.replace('/users');
    return;
  }
  void Promise.all([loadSettings(), loadResetDatabaseStatus()]);
});
</script>

<template>
  <div v-loading="loading" class="admin-list-page global-settings-page">
    <AdminSubNav :title="t('user.page_settings')" />

    <section class="global-settings-panel">
      <div class="list-settings-block">
        <p class="list-settings-title">{{ t('user.global_settings') }}</p>
        <el-form inline size="small" class="settings-form">
          <el-form-item :label="t('user.field.allow_password_change')">
            <el-switch v-model="playerSettings.allowPasswordChange" :loading="settingsSaving" @change="savePlayerSettings" />
          </el-form-item>
          <el-form-item :label="t('user.field.allow_username_change')">
            <el-switch v-model="playerSettings.allowUsernameChange" :loading="settingsSaving" @change="savePlayerSettings" />
          </el-form-item>
        </el-form>
      </div>

      <div class="list-settings-block">
        <p class="list-settings-title">{{ t('agent.hierarchy.settings_title') }}</p>
        <p class="list-settings-hint">{{ t('agent.hierarchy.settings_hint') }}</p>
        <el-form inline size="small" class="settings-form">
          <el-form-item :label="t('agent.hierarchy.max_level')">
            <el-input-number
              v-model="hierarchySettings.maxAgentLevel"
              :min="0"
              :step="1"
              controls-position="right"
              :disabled="hierarchySaving"
            />
          </el-form-item>
          <el-form-item>
            <el-button type="primary" :loading="hierarchySaving" @click="saveHierarchySettings">
              {{ t('common.save') }}
            </el-button>
          </el-form-item>
        </el-form>
      </div>

      <div class="list-settings-block">
        <p class="list-settings-title">{{ t('cashback.settings_title') }}</p>
        <el-form inline size="small" class="settings-form">
          <el-form-item :label="t('cashback.platform_direct_default_rate')">
            <RatePercentInput v-model="platformDirectRate" />
          </el-form-item>
          <p class="list-settings-hint block-hint">{{ t('cashback.platform_direct_default_hint') }}</p>
          <el-form-item :label="t('cashback.admin_invite_default_rate')">
            <RatePercentInput v-model="adminInviteRate" />
          </el-form-item>
          <p class="list-settings-hint block-hint">{{ t('cashback.admin_invite_default_hint') }}</p>
          <el-form-item>
            <el-button type="primary" :loading="platformDirectSaving" @click="savePlatformDirectSettings">
              {{ t('common.save') }}
            </el-button>
          </el-form-item>
        </el-form>
      </div>

      <div class="list-settings-block">
        <p class="list-settings-title">{{ t('user.betting_limits') }}</p>
        <el-form inline size="small" class="settings-form limits-form">
          <el-form-item :label="t('user.limit.min_stake')">
            <el-input-number v-model="bettingLimits.minStake" :min="0" :step="1" controls-position="right" />
          </el-form-item>
          <el-form-item :label="t('user.limit.max_stake_single')">
            <el-input-number v-model="bettingLimits.maxStakeSingle" :min="0" :step="100" controls-position="right" />
          </el-form-item>
          <el-form-item :label="t('user.limit.max_stake_parlay')">
            <el-input-number v-model="bettingLimits.maxStakeParlay" :min="0" :step="100" controls-position="right" />
          </el-form-item>
          <el-form-item :label="t('user.limit.max_payout_single')">
            <el-input-number v-model="bettingLimits.maxPayoutSingle" :min="0" :step="1000" controls-position="right" />
          </el-form-item>
          <el-form-item :label="t('user.limit.max_payout_parlay')">
            <el-input-number v-model="bettingLimits.maxPayoutParlay" :min="0" :step="1000" controls-position="right" />
          </el-form-item>
          <el-form-item :label="t('user.limit.daily_stake')">
            <el-input-number v-model="bettingLimits.dailyStakeLimit" :min="0" :step="1000" controls-position="right" />
          </el-form-item>
          <el-form-item>
            <el-button type="primary" :loading="limitsSaving" @click="saveBettingLimits">
              {{ t('common.save') }}
            </el-button>
          </el-form-item>
        </el-form>
      </div>

      <div class="list-settings-block list-settings-block--danger">
        <p class="list-settings-title">{{ t('user.reset_database') }}</p>
        <p class="list-settings-hint">{{ t('user.reset_database_hint') }}</p>
        <el-alert
          v-if="!resetAllowed"
          type="warning"
          :closable="false"
          show-icon
          class="reset-db-alert"
          :title="t('user.reset_database_disabled_prod')"
        />
        <el-form inline size="small" class="settings-form reset-db-form">
          <el-form-item :label="t('user.reset_database_confirm_label')">
            <el-input
              v-model="resetConfirmPhrase"
              :placeholder="t('user.reset_database_confirm_ph')"
              style="width: 160px"
              :disabled="!resetAllowed"
              autocomplete="off"
            />
          </el-form-item>
          <el-form-item>
            <el-button
              type="danger"
              plain
              :loading="resetLoading"
              :disabled="!resetAllowed || resetConfirmPhrase !== 'RESET'"
              @click="resetDatabase"
            >
              {{ t('user.reset_database_btn') }}
            </el-button>
          </el-form-item>
        </el-form>
      </div>
    </section>
  </div>
</template>

<style scoped>
.global-settings-page {
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 0;
}

.global-settings-page :deep(.admin-subnav) {
  margin-bottom: 10px;
}

.global-settings-panel {
  flex: 1;
  min-height: 0;
  overflow: auto;
  padding: 12px 14px 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-card);
}

.list-settings-block + .list-settings-block {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border-soft);
}

.list-settings-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  margin: 0 0 8px;
}

.list-settings-hint {
  font-size: 12px;
  color: var(--text-muted);
  margin: 0 0 10px;
  line-height: 1.5;
}

.block-hint {
  width: 100%;
  margin-top: -4px;
}

.list-settings-block--danger {
  border-top: 1px dashed var(--danger-border);
}

.reset-db-alert {
  margin-bottom: 10px;
}

.limits-form {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 12px;
}
</style>
