package controllers

import (
	"net/http"
	"s-class-backend/config"
	"s-class-backend/models"

	"github.com/gin-gonic/gin"
)

// Struktur data untuk menerima input dari Frontend (Form Modal)
type ScheduleInput struct {
	KodeMK     string `json:"kode_mk" binding:"required"`
	NamaMK     string `json:"nama_mk" binding:"required"`
	RoomID     int    `json:"room_id" binding:"required"` // 🌟 PERBAIKAN: Ubah uint menjadi int
	Hari       string `json:"hari" binding:"required"`
	JamMulai   string `json:"jam_mulai" binding:"required"`
	JamSelesai string `json:"jam_selesai" binding:"required"`
	JumlahSks  int    `json:"jumlah_sks" binding:"required"` 
}

// =========================================================
// 1. GET SCHEDULES (Menampilkan Data ke Tabel/Kalender)
// =========================================================
func GetSchedules(c *gin.Context) {
	var schedules []models.ClassSchedule

	// Mengambil semua data jadwal dan diurutkan berdasarkan Hari dan Jam Mulai
	if err := config.DB.Order("hari, jam_mulai").Find(&schedules).Error; err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Gagal mengambil data jadwal kuliah"})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"data": schedules,
	})
}

// =========================================================
// 2. CREATE SCHEDULE (Menambah Jadwal Baru)
// =========================================================
func CreateSchedule(c *gin.Context) {
	var input ScheduleInput
	if err := c.ShouldBindJSON(&input); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "Format data tidak valid: " + err.Error()})
		return
	}

	newSchedule := models.ClassSchedule{
		KodeMK:     input.KodeMK,
		NamaMK:     input.NamaMK,
		RoomID:     input.RoomID,
		Hari:       input.Hari,
		JamMulai:   input.JamMulai,
		JamSelesai: input.JamSelesai,
		JumlahSks:  input.JumlahSks,
	}

	if err := config.DB.Create(&newSchedule).Error; err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Gagal menyimpan jadwal baru ke database"})
		return
	}

	c.JSON(http.StatusCreated, gin.H{
		"message": "Jadwal berhasil ditambahkan",
		"data":    newSchedule,
	})
}

// =========================================================
// 3. UPDATE SCHEDULE (Mengedit Jadwal Saat UTS/Berubah)
// =========================================================
func UpdateSchedule(c *gin.Context) {
	scheduleID := c.Param("id")

	var input ScheduleInput
	if err := c.ShouldBindJSON(&input); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "Format data tidak valid"})
		return
	}

	var schedule models.ClassSchedule
	// Cari jadwal lama di database berdasarkan ID
	if err := config.DB.First(&schedule, scheduleID).Error; err != nil {
		c.JSON(http.StatusNotFound, gin.H{"error": "Jadwal tidak ditemukan"})
		return
	}

	// Timpa data lama dengan inputan baru dari Admin
	schedule.KodeMK = input.KodeMK
	schedule.NamaMK = input.NamaMK
	schedule.RoomID = input.RoomID
	schedule.Hari = input.Hari
	schedule.JamMulai = input.JamMulai
	schedule.JamSelesai = input.JamSelesai
	schedule.JumlahSks = input.JumlahSks

	// Simpan perubahan ke database
	if err := config.DB.Save(&schedule).Error; err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Gagal memperbarui jadwal"})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"message": "Jadwal berhasil diperbarui",
		"data":    schedule,
	})
}

// =========================================================
// 4. DELETE SCHEDULE (Menghapus Jadwal)
// =========================================================
func DeleteSchedule(c *gin.Context) {
	scheduleID := c.Param("id")

	var schedule models.ClassSchedule
	// Pastikan data yang mau dihapus itu memang ada
	if err := config.DB.First(&schedule, scheduleID).Error; err != nil {
		c.JSON(http.StatusNotFound, gin.H{"error": "Jadwal tidak ditemukan"})
		return
	}

	// Hapus secara permanen dari database
	if err := config.DB.Delete(&schedule).Error; err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Gagal menghapus jadwal"})
		return
	}

	c.JSON(http.StatusOK, gin.H{"message": "Jadwal berhasil dihapus"})
}