import { GradeService } from '#services/grade_service'
import { inject } from '@adonisjs/core'
import type { HttpContext } from '@adonisjs/core/http'
import { DateTime } from 'luxon'

const PERIODS = ['MONTH', 'SEMESTER', 'YEAR']

@inject()
export default class GradesController {
  constructor(private gradeService: GradeService) {}

  // GET /grades
  async index({ auth, request, response }: HttpContext) {
    const period = request.input('period', PERIODS[0]).toUpperCase()
    if (!PERIODS.includes(period)) {
      return response.badRequest({
        message: `Invalid period. Allowed values are: ${PERIODS.join(', ')}`,
      })
    }

    // TODO: Choose a start date
    // const { startDate: rawStartDate } = request.qs()

    // Validate startDate
    // const startDate = rawStartDate ? DateTime.fromISO(rawStartDate, { zone: 'local' }) : null
    // if (!rawStartDate || !startDate || !startDate.isValid) {
    //   return response.badRequest({ message: 'Invalid start date format' })
    // }

    const userId = auth.user!.id
    if (period === PERIODS[0]) {
      const startDate = DateTime.now().minus({ month: 1 })
      return this.gradeService.getMonthGrade(userId, startDate)
    }
    const months = period === PERIODS[1] ? 3 : 12
    const startDate = DateTime.now().minus({ months })
    return this.gradeService.getPeriodGrade(userId, startDate, months)
  }

  // TODO: Radar chart for subjects
}