import { register } from '@/services/mock/registry'
import { endpoints } from '@/services/api/endpoints'
import { adminCourseTemplates, adminOfferedCourses } from '@/services/mock/fixtures/admin-courses'
import { adminTerms } from '@/services/mock/fixtures/admin-terms'
import { adminUsers } from '@/services/mock/fixtures/admin-users'
import {
  filterDateRange,
  filterItems,
  findOrThrow,
  isoNow,
  makeId,
  paginate,
  removeById,
  updateById,
} from '@/services/mock/helpers'

register('GET', endpoints.getCourseTemplatesList, ({ query }) => {
  let list = filterItems(adminCourseTemplates, query, {
    title: 'includes',
    status: (item, v) => String(item.isActiveByDefault ? 1 : 0) === String(v),
  })
  list = filterDateRange(list, query)
  return paginate(list, query)
})

register('GET', endpoints.showCourseTemplate, ({ params }) => ({
  data: findOrThrow(adminCourseTemplates, params.id),
}))

register('POST', endpoints.addNewCourseTemplate, ({ data }) => {
  const teacher = adminUsers.find((u) => u.id === Number(data.defaultTeacherId))
  const item = {
    id: makeId(),
    title: data.title || '',
    description: data.description || '',
    image: data.imageId ? `https://picsum.photos/seed/course-${data.imageId}/200/200` : '',
    defaultTeacher: teacher
      ? {
          id: teacher.id,
          firstName: teacher.firstName,
          lastName: teacher.lastName,
          fullName: `${teacher.firstName} ${teacher.lastName}`,
        }
      : null,
    defaultCapacity: Number(data.defaultCapacity) || 0,
    isActiveByDefault: !!data.isActiveByDefault,
    prerequisitesCount: (data.prerequisites || []).length,
    prerequisites: (data.prerequisites || []).map((id) => ({
      courseId: id,
      course: adminCourseTemplates.find((c) => c.id === Number(id)) || { id },
    })),
    createdAt: isoNow(),
  }
  adminCourseTemplates.unshift(item)
  return { data: item }
})

register('PUT', endpoints.updateCourseTemplate, ({ params, data }) => {
  const teacher = adminUsers.find((u) => u.id === Number(data.defaultTeacherId))
  return {
    data: updateById(adminCourseTemplates, params.id, {
      title: data.title,
      description: data.description,
      image: data.imageId ? `https://picsum.photos/seed/course-${data.imageId}/200/200` : undefined,
      defaultTeacher: teacher
        ? {
            id: teacher.id,
            firstName: teacher.firstName,
            lastName: teacher.lastName,
            fullName: `${teacher.firstName} ${teacher.lastName}`,
          }
        : undefined,
      defaultCapacity: Number(data.defaultCapacity) || 0,
      isActiveByDefault: !!data.isActiveByDefault,
      prerequisites: (data.prerequisites || []).map((id) => ({
        courseId: id,
        course: adminCourseTemplates.find((c) => c.id === Number(id)) || { id },
      })),
      prerequisitesCount: (data.prerequisites || []).length,
    }),
  }
})

register('DELETE', endpoints.deleteCourseTemplate, ({ params }) => {
  removeById(adminCourseTemplates, params.id)
  return { data: { message: 'حذف موفق' } }
})

register('POST', endpoints.changeStatusCourseTemplate, ({ params, data }) => ({
  data: updateById(adminCourseTemplates, params.id, {
    isActiveByDefault: !!data.isActiveByDefault,
  }),
}))

register('GET', endpoints.getCoursesList, ({ query }) => {
  let list = filterItems(adminOfferedCourses, query, {
    title: 'includes',
    termId: 'eq',
    status: (item, v) => String(item.isActive ? 1 : 0) === String(v),
  })
  list = filterDateRange(list, query, 'startDate')
  return paginate(list, query)
})

register('GET', endpoints.showCourse, ({ params }) => ({
  data: findOrThrow(adminOfferedCourses, params.id),
}))

register('POST', endpoints.addNewCourse, ({ data }) => {
  const template = adminCourseTemplates.find((t) => t.id === Number(data.templateId))
  const term = adminTerms.find((t) => t.id === Number(data.termId))
  const teacher = adminUsers.find((u) => u.id === Number(data.teacherId))
  const item = {
    id: makeId(),
    title: data.title || template?.title || '',
    image: data.imageId ? `https://picsum.photos/seed/offered-${data.imageId}/200/200` : '',
    template: template ? { id: template.id, title: template.title } : null,
    templateId: template?.id,
    term: term ? { id: term.id, title: term.title } : null,
    termId: term?.id,
    teacher: teacher
      ? {
          id: teacher.id,
          firstName: teacher.firstName,
          lastName: teacher.lastName,
          fullName: `${teacher.firstName} ${teacher.lastName}`,
        }
      : null,
    capacity: Number(data.capacity) || 0,
    isActive: !!data.isActive,
    prerequisitesCount: 0,
    startDate: term?.startDate || '',
    endDate: term?.endDate || '',
    createdAt: isoNow(),
  }
  adminOfferedCourses.unshift(item)
  return { data: item }
})

register('PUT', endpoints.updateCourse, ({ params, data }) => {
  const template = adminCourseTemplates.find((t) => t.id === Number(data.templateId))
  const term = adminTerms.find((t) => t.id === Number(data.termId))
  return {
    data: updateById(adminOfferedCourses, params.id, {
      title: data.title,
      image: data.imageId
        ? `https://picsum.photos/seed/offered-${data.imageId}/200/200`
        : undefined,
      template: template ? { id: template.id, title: template.title } : undefined,
      templateId: template?.id,
      term: term ? { id: term.id, title: term.title } : undefined,
      termId: term?.id,
      capacity: Number(data.capacity) || 0,
      isActive: !!data.isActive,
    }),
  }
})

register('DELETE', endpoints.deleteCourse, ({ params }) => {
  removeById(adminOfferedCourses, params.id)
  return { data: { message: 'حذف موفق' } }
})

register('POST', endpoints.changeStatusCourse, ({ params, data }) => ({
  data: updateById(adminOfferedCourses, params.id, { isActive: !!data.isActive }),
}))