<template>
  <main class="main-content">
    <div class="app-container">
      <!-- Page Header -->
      <div class="page-header">
        <h1 class="page-title">Telegram Bot</h1>
        <p class="page-subtitle">
          Conectează-ți contul pentru acces rapid din Telegram
        </p>
      </div>

      <!-- Loading State -->
      <div v-if="loading" class="loading-state">
        <div class="loading-spinner"></div>
        <p>Se generează codul...</p>
      </div>

      <!-- Main Card -->
      <div v-else class="card">
        <!-- Generate Button -->
        <div class="generate-section">
          <button
            @click="generateCode"
            :disabled="loading"
            class="btn btn-primary btn-lg"
          >
            {{ loading ? "Se generează..." : "Generează Cod" }}
          </button>
        </div>

        <!-- Code Display & Actions -->
        <div v-if="linkingCode" class="code-section">
          <!-- Code Display -->
          <div class="code-display">
            <div class="code-header">
              <span class="code-label">Cod</span>
              <span class="code-timer">{{ formatTime(timeRemaining) }}</span>
            </div>
            <div class="code-value">{{ linkingCode }}</div>
          </div>

          <!-- Action Buttons -->
          <div class="action-buttons">
            <a
              :href="telegramDeepLink"
              target="_blank"
              rel="noopener noreferrer"
              class="btn btn-primary action-btn"
            >
              Deschide Telegram
            </a>
            <Button
              :label="showQR ? 'Ascunde QR' : 'Arată QR'"
              @click="showQR = !showQR"
              class="action-btn"
              outlined
            />
            <Button
              label="Copiază Cod"
              @click="copyCode"
              class="action-btn"
              outlined
            />
          </div>

          <!-- QR Code Display -->
          <div v-if="showQR" class="qr-section">
            <QRCodeVue :value="telegramDeepLink" :size="200" level="H" />
          </div>
        </div>
      </div>
    </div>
  </main>
</template>

<script setup>
import { ref, computed, onUnmounted } from "vue";
import { useToast } from "primevue/usetoast";
import Button from "primevue/button";
import Toast from "primevue/toast";
import QRCodeVue from "qrcode.vue";
import { apiService } from "../services/api";

const toast = useToast();

// State
const linkingCode = ref("");
const timeRemaining = ref(0);
const loading = ref(false);
const showQR = ref(false);

let countdownInterval = null;

// Config
const BOT_USERNAME =
  import.meta.env.VITE_TELEGRAM_BOT_USERNAME || "roa2web_bot";

// Computed
const telegramDeepLink = computed(() => {
  if (!linkingCode.value) return "";
  return `https://t.me/${BOT_USERNAME}?start=${linkingCode.value}`;
});

// Methods
const generateCode = async () => {
  loading.value = true;
  showQR.value = false;

  try {
    const response = await apiService.post("/telegram/auth/generate-code");
    linkingCode.value = response.data.linking_code;
    timeRemaining.value = response.data.expires_in_minutes * 60;

    toast.add({
      severity: "success",
      summary: "Cod Generat",
      detail: "Alege o metodă de conectare",
      life: 3000,
    });

    startCountdown();
  } catch (error) {
    console.error("Error generating code:", error);
    toast.add({
      severity: "error",
      summary: "Eroare",
      detail: error.response?.data?.detail || "Nu am putut genera codul",
      life: 5000,
    });
  } finally {
    loading.value = false;
  }
};

const startCountdown = () => {
  if (countdownInterval) clearInterval(countdownInterval);

  countdownInterval = setInterval(() => {
    if (timeRemaining.value > 0) {
      timeRemaining.value--;
    } else {
      clearInterval(countdownInterval);
      linkingCode.value = "";
      toast.add({
        severity: "warn",
        summary: "Cod Expirat",
        detail: "Generează un cod nou",
        life: 4000,
      });
    }
  }, 1000);
};

const formatTime = (seconds) => {
  const minutes = Math.floor(seconds / 60);
  const secs = seconds % 60;
  return `${minutes}:${secs.toString().padStart(2, "0")}`;
};

const copyCode = async () => {
  try {
    await navigator.clipboard.writeText(linkingCode.value);
    toast.add({
      severity: "success",
      summary: "Copiat",
      detail: "Cod copiat în clipboard",
      life: 2000,
    });
  } catch (error) {
    const tempInput = document.createElement("input");
    tempInput.value = linkingCode.value;
    document.body.appendChild(tempInput);
    tempInput.select();
    document.execCommand("copy");
    document.body.removeChild(tempInput);
    toast.add({
      severity: "success",
      summary: "Copiat",
      life: 2000,
    });
  }
};

onUnmounted(() => {
  if (countdownInterval) clearInterval(countdownInterval);
});
</script>

<style scoped>
/* Page Header - Uses global .page-header pattern */
/* Loading - Uses global .loading-spinner pattern */
/* Card - Uses global .card pattern */

/* Generate Section */
.generate-section {
  display: flex;
  justify-content: center;
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}

/* Generate button - Uses global .btn .btn-primary pattern */

/* Code Section */
.code-section {
  margin-top: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

/* Code Display */
.code-display {
  background: linear-gradient(
    135deg,
    rgba(67, 97, 238, 0.08),
    rgba(67, 97, 238, 0.02)
  );
  border: 2px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  text-align: center;
}

.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-xs);
  font-size: var(--text-sm);
}

.code-label {
  color: var(--color-text-secondary);
  font-weight: var(--font-semibold);
}

.code-timer {
  color: var(--color-primary);
  font-weight: var(--font-bold);
  font-family: "Courier New", monospace;
}

.code-value {
  font-size: 2rem;
  font-weight: var(--font-bold);
  color: var(--color-primary);
  letter-spacing: 0.3em;
  font-family: "Courier New", monospace;
}

/* Action Buttons - Use global .btn patterns */
.action-buttons {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.action-btn {
  flex: 1;
  min-width: 160px;
  justify-content: center;
}

/* QR Section */
.qr-section {
  display: flex;
  justify-content: center;
  padding: var(--space-lg);
  background: white;
  border-radius: var(--radius-md);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

/* Responsive - Telegram-specific adjustments */
@media (max-width: 768px) {
  .code-value {
    font-size: 1.5rem;
    letter-spacing: 0.2em;
  }

  .action-buttons {
    flex-direction: column;
  }

  .action-btn {
    width: 100%;
    min-width: unset;
  }
}
</style>
