// Per-role sidebar sections, kept as plain builder functions so any layout
// can request the union of sections for every role a user holds — additive
// multi-role access without each layout hardcoding its own single-role list.
// Only roles with a registered builder participate in the merge; a role
// without one (e.g. admin) contributes nothing and keeps its own standalone
// menu untouched.

export const buildStudentMenuItems = (route) => [
  {
    title: 'داشبورد',
    icon: 'monitor',
    to: { name: 'student-dashboard' },
    active: route.name === 'student-dashboard',
    dedupeKey: 'dashboard',
  },
  {
    title: 'آموزش',
    icon: 'graduation-cap',
    to: { name: 'student-terms' },
    active: [
      'student-terms',
      'student-term-details',
      'student-lesson-details',
      'student-session-details',
      'student-exam',
      'student-courses',
      'student-course-details',
    ].includes(route.name),
    dedupeKey: 'education',
  },
  {
    title: 'خدمات',
    icon: 'folder-simple-star',
    to: { name: 'student-services' },
    active: route.name === 'student-services',
  },
  {
    title: 'مشاوره',
    icon: 'chat-teardrop-text',
    to: { name: 'student-consultants' },
    active: route.name === 'student-consultants',
  },
  {
    title: 'گواهینامه',
    icon: 'certificate',
    to: { name: 'student-certificates' },
    active: route.name === 'student-certificates',
  },
  {
    title: 'ویرایش پروفایل',
    icon: 'user-circle-check',
    to: { name: 'student-profile' },
    active: route.name === 'student-profile',
  },
  {
    title: 'تیکت',
    icon: 'envelope-open',
    to: { name: 'student-tickets' },
    active: route.name === 'student-tickets',
    dedupeKey: 'ticket',
  },
]

export const buildMissionaryMenuItems = (route) => [
  {
    title: 'پیشخوان',
    icon: 'menu',
    to: { name: 'missionary-dashboard' },
    active: route.name === 'missionary-dashboard',
    dedupeKey: 'dashboard',
  },
  {
    title: 'سامانه اعزام',
    icon: 'user-sound',
    to: { name: 'missionary-requests' },
    active: route.name === 'missionary-requests',
  },
  {
    title: 'آموزش من',
    icon: 'graduation-cap',
    to: { name: 'missionary-education' },
    active: route.name?.startsWith('missionary-education'),
    dedupeKey: 'education',
  },
  {
    title: 'تیکت',
    icon: 'envelope-open',
    to: { name: 'missionary-tickets' },
    active: route.name === 'missionary-tickets',
    dedupeKey: 'ticket',
  },
]

export const buildCounselorMenuItems = (route) => [
  {
    title: 'پیشخوان',
    icon: 'menu',
    to: { name: 'counselor-dashboard' },
    active: route.name === 'counselor-dashboard',
    dedupeKey: 'dashboard',
  },
  {
    title: 'مشاوره',
    icon: 'chat',
    to: { name: 'counselor-consultations' },
    active: route.name === 'counselor-consultations',
    dedupeKey: 'consultation',
  },
]

const MENU_BUILDERS = {
  student: buildStudentMenuItems,
  missionary: buildMissionaryMenuItems,
  counselor: buildCounselorMenuItems,
}

/**
 * Union of every panel section unlocked by `roles`, in role order (roles
 * come back from the API ordered by role id, so a user's base role's
 * sections lead and each additional role's sections are appended after).
 * Items sharing a dedupeKey across roles are merged — only the first
 * occurrence is kept (the primary role's version wins).
 */
export const buildMergedMenuItems = (roles, route) => {
  const seenRoles = new Set()
  const seenKeys = new Set()
  const items = []
  for (const roleName of roles ?? []) {
    const builder = MENU_BUILDERS[roleName]
    if (!builder || seenRoles.has(roleName)) continue
    seenRoles.add(roleName)
    for (const item of builder(route)) {
      if (item.dedupeKey && seenKeys.has(item.dedupeKey)) continue
      if (item.dedupeKey) seenKeys.add(item.dedupeKey)
      items.push(item)
    }
  }
  return items
}