// ================================================================
// API & Networking
// ================================================================

window.fetchTowns = async function() {
  try {
    const res = await fetch('/dashboard/towns');
    window.towns = await res.json();
    window.renderTowns();
    window.updateServerStatus(true);

    if (window.selectedTownId) {
      window.renderBuildQueuePreview();
      window.renderBuildingDropdown();
      window.renderUnitDropdown();
      window.renderTownDetails();
    }
  } catch (e) {
    window.updateServerStatus(false);
  }
};

window.fetchClientStatus = async function() {
  try {
    const res = await fetch('/dashboard/client-status');
    const data = await res.json();
    const isOnline = data.online === true;

    // Detect transition: online → offline
    if (window.wasClientOnline === true && !isOnline) {
      // Fail all queued commands immediately
      await fetch('/dashboard/commands/fail-stale', { method: 'POST' });
      window.fetchLog();
    }

    window.clientOnline = isOnline;
    window.wasClientOnline = isOnline;
    window.updateClientStatus(isOnline);
  } catch (e) {
    window.updateClientStatus(false);
  }
};

window.fetchLog = async function() {
  try {
    const res = await fetch('/dashboard/commands');
    const cmds = await res.json();
    window.renderLog(cmds);
  } catch (e) {}
};

window.updateServerStatus = function(online) {
  const el = document.getElementById('server-status');
  if (online) {
    el.textContent = '● Server';
    el.className = 'conn-badge online';
  } else {
    el.textContent = '● Server offline';
    el.className = 'conn-badge offline';
  }
};

window.updateClientStatus = function(online) {
  const el = document.getElementById('client-status');
  if (online) {
    el.textContent = '● Script';
    el.className = 'conn-badge online';
  } else {
    el.textContent = '● Script offline';
    el.className = 'conn-badge offline';
  }
  // Enable/disable the Send button
  const btn = document.querySelector('#command-form-wrap .btn-gold');
  if (btn) {
    btn.disabled = !online;
    btn.title = online ? '' : 'Script is offline — cannot send commands';
    btn.style.opacity = online ? '' : '0.4';
    btn.style.cursor  = online ? '' : 'not-allowed';
  }
};

window.sendCommand = async function() {
  if (!window.clientOnline) return alert('Το script είναι offline — δεν μπορείτε να στείλετε εντολές.');
  const town = window.getSelectedTown();
  if (!town) return alert('Select a town first.');

  const type = document.getElementById('cmd-type').value;
  let payload = {};

  if (type === 'build') {
    const building_id = document.getElementById('building-select').value;
    const bData = town.build_data?.[building_id];
    
    // UI Validation logic
    if (bData) {
      const missingDeps = bData.missing_dependencies || {};
      const missingKeys = Object.keys(missingDeps);
      
      // 1. Popup if dependencies are lacking
      if (missingKeys.length > 0) {
        let msg = '⚠ ΑΔΥΝΑΤΗ Η ΚΑΤΑΣΚΕΥΗ: Λείπουν προϋποθέσεις!\n\nΑπαιτείται:\n';
        for (const k of missingKeys) {
            msg += `- ${missingDeps[k].name} (Επίπεδο ${missingDeps[k].needed_level})\n`;
        }
        return alert(msg);
      }
      
      // 2. Confirmation if resources are lacking
      if (bData.enough_resources === false) {
          if (!confirm('❌ Δεν έχετε αρκετούς πόρους!\n\nΘέλετε να προστεθεί στην ουρά αναμονής; Το σύστημα θα το χτίσει αυτόματα μόλις συγκεντρωθούν οι πόροι.')) {
              return;
          }
      }
    }
    
    payload = { building_id };
  } else {
    const unit_id = document.getElementById('unit-select').value;
    const amount = parseInt(document.getElementById('recruit-amount').value) || 1;
    const uData = town.unit_data?.[unit_id];
    
    // UI Validation logic
    if (uData) {
      const missingDeps = uData.missing_dependencies || {};
      const missingKeys = Object.keys(missingDeps);
      
      // 1. Popup if dependencies are lacking
      if (missingKeys.length > 0) {
        let msg = '⚠ ΑΔΥΝΑΤΗ Η ΕΚΠΑΙΔΕΥΣΗ: Λείπουν προϋποθέσεις!\n\nΑπαιτείται:\n';
        for (const k of missingKeys) {
            msg += `- ${missingDeps[k].name || k} (Επίπεδο ${missingDeps[k].needed_level || '1'})\n`;
        }
        return alert(msg);
      }
      
      // 2. Confirmation if resources are lacking for 1x
      if (uData.enough_resources === false) {
          if (!confirm(`❌ Δεν έχετε αρκετούς πόρους για 1x ${unit_id}!\n\nΘέλετε να προστεθεί στην ουρά αναμονής; Το σύστημα θα εκπαιδεύσει τον στρατό μόλις συγκεντρωθούν οι πόροι.`)) {
              return;
          }
      }
    }

    payload = { unit_id, amount };
  }

  try {
    const res = await fetch('/dashboard/commands', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({
        town_id:   town.town_id,
        town_name: town.town_name,
        type,
        payload
      })
    });
    const data = await res.json();
    if (data.ok) {
      window.fetchLog();
    } else if (data.error === 'client_offline') {
      alert(data.message || 'Το script είναι offline.');
    } else {
      alert('Error: ' + JSON.stringify(data));
    }
  } catch (e) {
    alert('Failed to send command: ' + e);
  }
};

window.cancelCommand = async function(id) {
  await fetch(`/dashboard/commands/${id}`, { method: 'DELETE' });
  window.fetchLog();
};