const { pool } = require('../database')
const dayjs = require('dayjs')

async function updateCurrentYears() {
  const fullDate = dayjs().format('YYYY-MM-DD')

  // Clear current year flag
  const clearCurrent = 'UPDATE anneescolaire SET is_Current = 0 WHERE id > 0'
  pool.query(clearCurrent)

  // Set the new current year
  const updateCurrent = `
    UPDATE anneescolaire
    SET is_Current = 1
    WHERE ? >= debut AND ? <= fin
  `
  // console.log();
  pool.query(updateCurrent, [fullDate, fullDate])

  // Check if the update was successful
  const sql = `
      SELECT * FROM anneescolaire
      WHERE ? >= debut AND ? <= fin
    `
  const [rows] = await pool.query(sql, [fullDate, fullDate])

  const check = rows[0]
  if (!check) return

  // 2. Check if already in traitmentsystem
  const searchSql = `SELECT * FROM traitmentsystem WHERE code = ?`
  const [searchRows] = await pool.query(searchSql, [check.code])

  if (searchRows.length === 0) {
    // 3. Insert into traitmentsystem
    const insertSql = `
        INSERT INTO traitmentsystem (code, debut, fin)
        VALUES (?, ?, ?)
      `
    await pool.query(insertSql, [check.code, check.debut, check.fin])
  } else {
    console.log('No active school year found for the current date.')
  }
}

// async function updateStudents() {
//   const getInfinishedYears = database
//     .prepare('SELECT * FROM traitmentsystem WHERE is_finished = 0 ORDER BY id ASC')
//     .get()

//   const allEtudiants = database
//     .prepare('SELECT * FROM etudiants WHERE annee_scolaire = ?')
//     .all(getInfinishedYears.code)

//   function checkNull(params) {
//     if (params == null || params == undefined) {
//       return null
//     }
//     return params
//   }

//   function compareSessionNotes(session1, session2) {
//     let notes
//     if (session2) {
//       if (session1 < session2.note) {
//         notes = session2.note
//       } else {
//         notes = session1
//       }
//     } else {
//       notes = session1
//     }
//     return notes
//   }

//   database.transaction(() => {
//     // get all note of student
//     const queryNotes = database.prepare(
//       `SELECT DISTINCT etudiant_id FROM notes WHERE etudiant_niveau = ? AND annee_scolaire = ?`
//     )
//     let allEtudiantWithNotes = []
//     let etudiantWithNotes = []
//     let dataToMap = []
//     let allEtudiantWithNotesRepech = []
//     let etudiantWithNotesRepech = []

//     for (const etudiant of allEtudiants) {
//       const results = queryNotes.all(etudiant.niveau, etudiant.annee_scolaire)
//       etudiantWithNotes.push(...results) // Avoid nested arrays
//     }

//     const uniqueId = etudiantWithNotes.filter(
//       (item, index, self) => index === self.findIndex((t) => t.etudiant_id === item.etudiant_id)
//     )

//     const query2 = database.prepare(
//       'SELECT notes.*, etudiants.*, matieres.id, matieres.nom AS nomMat, matieres.credit FROM notes LEFT JOIN etudiants ON (notes.etudiant_id = etudiants.id) LEFT JOIN matieres ON (notes.matiere_id = matieres.id) WHERE notes.etudiant_id = ?'
//     )

//     for (let j = 0; j < uniqueId.length; j++) {
//       allEtudiantWithNotes.push(query2.all(uniqueId[j].etudiant_id))
//     }

//     const query = database.prepare(
//       `SELECT DISTINCT etudiant_id FROM notesrepech WHERE etudiant_niveau = ? AND annee_scolaire = ?`
//     )

//     for (const etudiant of allEtudiants) {
//       const results = query.all(etudiant.niveau, etudiant.annee_scolaire)
//       etudiantWithNotesRepech.push(...results) // Avoid nested arrays
//     }

//     const uniqueIdRepech = etudiantWithNotes.filter(
//       (item, index, self) => index === self.findIndex((t) => t.etudiant_id === item.etudiant_id)
//     )

//     const query2Repech = database.prepare(
//       'SELECT notesrepech.*, etudiants.*, matieres.id, matieres.nom AS nomMat, matieres.credit FROM notesrepech INNER JOIN etudiants ON (notesrepech.etudiant_id = etudiants.id) INNER JOIN matieres ON (notesrepech.matiere_id = matieres.id) WHERE notesrepech.etudiant_id = ?'
//     )

//     for (let j = 0; j < uniqueIdRepech.length; j++) {
//       allEtudiantWithNotesRepech.push(query2Repech.all(uniqueIdRepech[j].etudiant_id))
//     }

//     for (let index = 0; index < allEtudiantWithNotes.length; index++) {
//       let total = 0
//       let note = 0
//       let totalCredit = 0

//       // Create a new object for each student
//       let modelJson = {
//         id: '',
//         nom: '',
//         prenom: '',
//         photos: '',
//         moyenne: '',
//         mention: '',
//         niveau: '',
//         annee_scolaire: ''
//       }

//       for (let j = 0; j < allEtudiantWithNotes[index].length; j++) {
//         modelJson.id = allEtudiantWithNotes[index][j].etudiant_id
//         modelJson.nom = allEtudiantWithNotes[index][j].nom
//         modelJson.prenom = allEtudiantWithNotes[index][j].prenom
//         modelJson.photos = allEtudiantWithNotes[index][j].photos
//         modelJson.mention = allEtudiantWithNotes[index][j].mention_id
//         modelJson.niveau = allEtudiantWithNotes[index][j].niveau
//         modelJson.annee_scolaire = allEtudiantWithNotes[index][j].annee_scolaire

//         // console.log(checkNull(session[index][j]));
//         if (allEtudiantWithNotesRepech[index]) {
//           note +=
//             compareSessionNotes(
//               allEtudiantWithNotes[index][j].note,
//               checkNull(allEtudiantWithNotesRepech[index][j])
//             ) * allEtudiantWithNotes[index][j].credit
//         } else {
//           note += allEtudiantWithNotes[index][j].note * allEtudiantWithNotes[index][j].credit
//         }
//         totalCredit += allEtudiantWithNotes[index][j].credit
//       }

//       total = note / totalCredit
//       modelJson.moyenne = total.toFixed(2)

//       // Add the new object to the array
//       dataToMap.push(modelJson)
//     }

//     // update all etudiant
//     let updated = false
//     if (dataToMap.length != 0) {
//       let noteSystem = database.prepare('SELECT * FROM notesystems').get()
//       for (let index = 0; index < dataToMap.length; index++) {
//         if (dataToMap[index].moyenne >= noteSystem.admis) {
//           let updateQuery = database.prepare(
//             'UPDATE etudiants SET niveau = ?, annee_scolaire = ?, status = ? WHERE id = ?'
//           )
//           updateQuery.run(
//             nextLevel(dataToMap[index].niveau),
//             updateSchoolYear(dataToMap[index].annee_scolaire),
//             2,
//             dataToMap[index].id
//           )
//           updated = true
//         } else if (
//           dataToMap[index].moyenne < noteSystem.admis &&
//           dataToMap[index].moyenne >= noteSystem.redouble
//         ) {
//           let updateQuery = database.prepare(
//             'UPDATE etudiants SET niveau = ?, annee_scolaire = ? status = ? WHERE id = ?'
//           )
//           updateQuery.run(
//             dataToMap[index].niveau,
//             updateSchoolYear(dataToMap[index].annee_scolaire),
//             3,
//             dataToMap[index].id
//           )
//           updated = true
//         } else {
//           let updateQuery = database.prepare(
//             'UPDATE etudiants SET niveau = ?, annee_scolaire = ? status = ? WHERE id = ?'
//           )
//           updateQuery.run(
//             dataToMap[index].niveau,
//             dataToMap[index].annee_scolaire,
//             4,
//             dataToMap[index].id
//           )
//           updated = true
//         }
//       }
//     }

//     if (updated) {
//       const updateInfinishedYears = database.prepare(
//         'UPDATE traitmentsystem SET is_finished = 1 WHERE id = ?'
//       )

//       updateInfinishedYears.run(getInfinishedYears.id)
//     }
//   })()
// }

// function nextLevel(niveau) {
//   if (niveau == 'L1') {
//     return 'L2'
//   } else if (niveau == 'L2') {
//     return 'L3'
//   } else if (niveau == 'L3') {
//     return 'M1'
//   } else if (niveau == 'M1') {
//     return 'M2'
//   } else if (niveau == 'M2') {
//     return 'D1'
//   } else if (niveau == 'D1') {
//     return 'D2'
//   } else if (niveau == 'D2') {
//     return 'D3'
//   } else if (niveau == 'D3') {
//     return 'PHD'
//   }
// }

// function updateSchoolYear(year) {
//   // Split the year into two parts
//   const [startYear, endYear] = year.split('-').map(Number)

//   // Increment both the start and end year by 1
//   const newStartYear = startYear + 1
//   const newEndYear = endYear + 1

//   // Join the new years with a hyphen
//   const newYear = `${newStartYear}-${newEndYear}`

//   return newYear
// }

async function matiereSysteme(etudiant_niveau) {
  let systeme
  if (etudiant_niveau == 'L1') {
    systeme = ['S1', 'S2']
  } else if (etudiant_niveau == 'L2') {
    systeme = ['S3', 'S4']
  } else if (etudiant_niveau == 'L3') {
    systeme = ['S5', 'S6']
  } else if (etudiant_niveau == 'M1') {
    systeme = ['S7', 'S8']
  } else if (etudiant_niveau == 'M2') {
    systeme = ['S9', 'S10']
  } else if (etudiant_niveau == 'D1') {
    systeme = ['S11', 'S12']
  } else if (etudiant_niveau == 'D2') {
    systeme = ['S13', 'S14']
  } else if (etudiant_niveau == 'D3') {
    systeme = ['S15', 'S16']
  }

  return systeme
}

async function matiereSystemReverse(semestre) {
  if (semestre == 'S1' || semestre == 'S2') {
    return 'L1'
  } else if (semestre == 'S3' || semestre == 'S4') {
    return 'L2'
  } else if (semestre == 'S5' || semestre == 'S6') {
    return 'L3'
  } else if (semestre == 'S7' || semestre == 'S8') {
    return 'M1'
  } else if (semestre == 'S9' || semestre == 'S10') {
    return 'M2'
  } else if (semestre == 'S11' || semestre == 'S12') {
    return 'D1'
  } else if (semestre == 'S13' || semestre == 'S14') {
    return 'D2'
  } else if (semestre == 'S15' || semestre == 'S16') {
    return 'D3'
  }
}

// async function getNessesarytable() {
//   try {
//     const query = await database.prepare('SELECT * FROM nessesaryTable').get()

//     return query
//   } catch (error) {
//     return error
//   }
// }

// async function updateNessesaryTable(id, multiplicateur) {
//   const query = database.prepare('UPDATE nessesaryTable SET uniter_heure = ? WHERE id = ?')

//   try {
//     let update = query.run(multiplicateur, id)

//     return update
//   } catch (error) {
//     return error
//   }
// }

module.exports = {
  matiereSysteme,
  updateCurrentYears,
  // updateStudents,
  // getNessesarytable,
  // updateNessesaryTable,
  matiereSystemReverse
}