package handlers

import (
	"net/http"

	"github.com/breakpilot/school-service/internal/notifications"
	"github.com/breakpilot/school-service/internal/services"
	"github.com/gin-gonic/gin"
	"github.com/jackc/pgx/v5/pgxpool"
)

// Handler holds all the service dependencies
type Handler struct {
	classService       *services.ClassService
	examService        *services.ExamService
	gradeService       *services.GradeService
	gradebookService   *services.GradebookService
	certificateService *services.CertificateService
	aiService          *services.AIService
	timetableService   *services.TimetableService
	calendarService     *services.CalendarService
	parentService       *services.ParentService
	notificationService *notifications.Service
	solverServiceURL    string
}

// NewHandler creates a new Handler with all services
func NewHandler(db *pgxpool.Pool, llmGatewayURL, solverServiceURL, matrixURL, emailURL string) *Handler {
	classService := services.NewClassService(db)
	examService := services.NewExamService(db)
	gradeService := services.NewGradeService(db)
	gradebookService := services.NewGradebookService(db)
	certificateService := services.NewCertificateService(db, gradeService, gradebookService)
	aiService := services.NewAIService(llmGatewayURL)
	timetableService := services.NewTimetableService(db)
	calendarService := services.NewCalendarService(db)
	parentService := services.NewParentService(db)
	notificationService := notifications.NewService(db, matrixURL, emailURL)

	return &Handler{
		classService:        classService,
		examService:         examService,
		gradeService:        gradeService,
		gradebookService:    gradebookService,
		certificateService:  certificateService,
		aiService:           aiService,
		timetableService:    timetableService,
		calendarService:     calendarService,
		parentService:       parentService,
		notificationService: notificationService,
		solverServiceURL:    solverServiceURL,
	}
}

// NotificationService exposes the underlying service so main.go can run
// the daily cron tick.
func (h *Handler) NotificationService() *notifications.Service {
	return h.notificationService
}

// CalendarService exposes the underlying service so main.go can run the
// one-off seed import after migrations.
func (h *Handler) CalendarService() *services.CalendarService {
	return h.calendarService
}

// ParentService exposes the parent service so the parent-session middleware
// in main.go can resolve session cookies.
func (h *Handler) ParentService() *services.ParentService {
	return h.parentService
}

// Health returns the service health status
func (h *Handler) Health(c *gin.Context) {
	c.JSON(http.StatusOK, gin.H{
		"status":  "healthy",
		"service": "school-service",
	})
}

// getUserID extracts the user ID from the context (set by auth middleware)
func getUserID(c *gin.Context) string {
	return c.GetString("user_id")
}

// respondError sends an error response
func respondError(c *gin.Context, status int, message string) {
	c.JSON(status, gin.H{"error": message})
}

// respondSuccess sends a success response with data
func respondSuccess(c *gin.Context, data interface{}) {
	c.JSON(http.StatusOK, data)
}

// respondCreated sends a created response with data
func respondCreated(c *gin.Context, data interface{}) {
	c.JSON(http.StatusCreated, data)
}