/**
 * mock-data.js — Sample data for the Hotline Planner
 * Mirrors future DB schema. Replace with API calls when backend is ready.
 */

const SHIFT_TYPES = [
  { id: 'morning',   label: 'Morning',   color: 'morning',   allDay: false, category: 'shift' },
  { id: 'afternoon', label: 'Afternoon', color: 'afternoon', allDay: false, category: 'shift' },
  { id: 'night',     label: 'Night',     color: 'night',     allDay: false, category: 'shift' },
  { id: 'allday',    label: 'All Day',   color: 'allday',    allDay: true,  category: 'shift' },
  { id: 'training',  label: 'Training',  color: 'training',  allDay: false, category: 'activity' },
];

const EXNET_GROUPS = [
  { id: 'molecular-app', label: 'Molecular App', color: 'exnet' },
  { id: 'voice-support', label: 'Voice Support', color: 'exnet' },
  { id: 'email-queue',   label: 'Email Queue',   color: 'exnet' },
  { id: 'chat-support',  label: 'Chat Support',  color: 'exnet' },
];

const DEPARTMENTS = [
  'Voice Team',
  'Email Team',
  'Molecular',
  'Specialist',
];

const SKILLS = [
  'Voice', 'Email', 'Chat', 'Molecular', 'Billing',
  'Tech Support', 'Escalation', 'Training', 'QA',
];

const AGENTS = [
  { id: 'a1',  name: 'Anna Müller',      email: 'anna.mueller@company.de',     department: 'Voice Team',  skills: ['Voice', 'Chat', 'Escalation'] },
  { id: 'a2',  name: 'Ben Schmidt',      email: 'ben.schmidt@company.de',      department: 'Email Team',  skills: ['Email', 'Billing'] },
  { id: 'a3',  name: 'Clara Weber',      email: 'clara.weber@company.de',      department: 'Molecular',   skills: ['Molecular', 'Tech Support'] },
  { id: 'a4',  name: 'David Fischer',    email: 'david.fischer@company.de',    department: 'Voice Team',  skills: ['Voice', 'Training'] },
  { id: 'a5',  name: 'Elena Braun',      email: 'elena.braun@company.de',      department: 'Specialist',  skills: ['Escalation', 'QA', 'Voice'] },
  { id: 'a6',  name: 'Felix Wagner',     email: 'felix.wagner@company.de',     department: 'Email Team',  skills: ['Email', 'Chat'] },
  { id: 'a7',  name: 'Greta Hoffmann',   email: 'greta.hoffmann@company.de',   department: 'Molecular',   skills: ['Molecular', 'Billing', 'QA'] },
  { id: 'a8',  name: 'Hans Becker',      email: 'hans.becker@company.de',      department: 'Voice Team',  skills: ['Voice', 'Tech Support'] },
  { id: 'a9',  name: 'Irene Koch',       email: 'irene.koch@company.de',       department: 'Specialist',  skills: ['Training', 'Escalation'] },
  { id: 'a10', name: 'Jonas Schäfer',    email: 'jonas.schaefer@company.de',   department: 'Email Team',  skills: ['Email', 'Chat', 'Voice'] },
  { id: 'a11', name: 'Kathrin Richter',  email: 'kathrin.richter@company.de',  department: 'Voice Team',  skills: ['Voice', 'Billing'] },
  { id: 'a12', name: 'Lukas Meyer',      email: 'lukas.meyer@company.de',      department: 'Molecular',   skills: ['Molecular', 'Training'] },
  { id: 'a13', name: 'Maria Schulz',     email: 'maria.schulz@company.de',     department: 'Specialist',  skills: ['QA', 'Escalation', 'Chat'] },
  { id: 'a14', name: 'Nico Wolf',        email: 'nico.wolf@company.de',        department: 'Voice Team',  skills: ['Voice', 'Tech Support', 'Email'] },
  { id: 'a15', name: 'Olivia Schwarz',   email: 'olivia.schwarz@company.de',   department: 'Email Team',  skills: ['Email', 'Billing', 'QA'] },
];

const ACTIVE_USERS = [
  { id: 'u1', name: 'Max Planner',    initials: 'MP', color: '#1976D2' },
  { id: 'u2', name: 'Lisa Admin',     initials: 'LA', color: '#7B1FA2' },
  { id: 'u3', name: 'Tom Scheduler',  initials: 'TS', color: '#00897B' },
  { id: 'u4', name: 'Sarah Lead',     initials: 'SL', color: '#E65100' },
  { id: 'u5', name: 'Jan Ops',        initials: 'JO', color: '#AD1457' },
  { id: 'u6', name: 'Paula HR',       initials: 'PH', color: '#558B2F' },
  { id: 'u7', name: 'Chris Manager',  initials: 'CM', color: '#6A1B9A' },
];

const VERSION_HISTORY = [
  { id: 'v1', user: 'Max Planner',   action: 'Updated shifts for Anna Müller (Feb 17–21)',   timestamp: '2026-02-13T12:30:00' },
  { id: 'v2', user: 'Lisa Admin',    action: 'Added training block for David Fischer',        timestamp: '2026-02-13T11:15:00' },
  { id: 'v3', user: 'Tom Scheduler', action: 'Changed coverage targets for Week 8',           timestamp: '2026-02-13T09:45:00' },
  { id: 'v4', user: 'Sarah Lead',    action: 'Imported new ExNet requirements',               timestamp: '2026-02-12T16:20:00' },
  { id: 'v5', user: 'Max Planner',   action: 'Bulk updated Voice Team shifts',                timestamp: '2026-02-12T14:00:00' },
];

/**
 * Generate a sample schedule.
 * Key format: `{agentId}_{YYYY-MM-DD}`
 * Value: { shifts: string[], exnet: string[], notes: string, locked: null|userId }
 */
function generateSampleSchedule(agents, startDate, days) {
  const schedule = {};
  const shiftIds = SHIFT_TYPES.map(s => s.id);
  const exnetIds = EXNET_GROUPS.map(e => e.id);

  agents.forEach(agent => {
    for (let d = 0; d < days; d++) {
      const date = new Date(startDate);
      date.setDate(date.getDate() + d);
      const dateStr = date.toISOString().split('T')[0];
      const key = `${agent.id}_${dateStr}`;

      const dayOfWeek = date.getDay();
      // Skip weekends for most agents
      if (dayOfWeek === 0 || dayOfWeek === 6) {
        schedule[key] = { shifts: [], exnet: [], notes: '', locked: null, history: [] };
        continue;
      }

      // Semi-random shift assignment for demo
      const seed = (agent.id.charCodeAt(1) * 31 + d * 7) % 100;
      const shifts = [];
      const exnet = [];

      if (seed < 40) {
        shifts.push('morning');
      } else if (seed < 60) {
        shifts.push('afternoon');
      } else if (seed < 70) {
        shifts.push('morning', 'training');
      } else if (seed < 80) {
        shifts.push('allday');
      } else if (seed < 85) {
        shifts.push('night');
      }
      // leave some empty

      if (seed % 5 === 0 && shifts.length > 0) {
        exnet.push(exnetIds[seed % exnetIds.length]);
      }

      const notes = seed % 20 === 0 ? 'Please note: adjusted hours' : '';
      const locked = seed === 42 ? 'u2' : null;

      const history = shifts.length > 0 ? [
        {
          user: ACTIVE_USERS[seed % ACTIVE_USERS.length].name,
          action: `Set ${shifts.join(', ')}`,
          timestamp: new Date(Date.now() - seed * 3600000).toISOString()
        }
      ] : [];

      schedule[key] = { shifts, exnet, notes, locked, history };
    }
  });

  return schedule;
}

/**
 * Generate ExNet targets per date.
 * Returns: { 'YYYY-MM-DD': { target: number, group: string } }
 */
function generateExnetTargets(startDate, days) {
  const targets = {};
  const groups = EXNET_GROUPS;

  for (let d = 0; d < days; d++) {
    const date = new Date(startDate);
    date.setDate(date.getDate() + d);
    const dateStr = date.toISOString().split('T')[0];
    const dayOfWeek = date.getDay();

    if (dayOfWeek === 0 || dayOfWeek === 6) {
      targets[dateStr] = { target: 0, group: '' };
    } else {
      const seed = (d * 13) % 100;
      targets[dateStr] = {
        target: 2 + (seed % 4),
        group: groups[d % groups.length].label,
      };
    }
  }

  return targets;
}