package com.cs102.attendance.controller;

import com.cs102.attendance.entity.Student;
import com.cs102.attendance.entity.FaceData;
import com.cs102.attendance.service.StudentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.UUID;
import java.util.Optional;

@RestController
@RequestMapping("/api/students")
@CrossOrigin(origins = "*") // Allow CORS for testing
public class StudentController {

    @Autowired
    private StudentService studentService;

    // Create a new student
    @PostMapping
    public ResponseEntity<Student> createStudent(@RequestBody CreateStudentRequest request) {
        try {
            Student student = studentService.enrol(
                request.getCode(),
                request.getName(),
                request.getClassName(),
                request.getStudentGroup(),
                request.getEmail(),
                request.getPhone()
            );
            return ResponseEntity.ok(student);
        } catch (Exception e) {
            return ResponseEntity.badRequest().build();
        }
    }

    // Get all students
    @GetMapping
    public ResponseEntity<List<Student>> getAllStudents() {
        try {
            List<Student> students = studentService.getAllStudents();
            return ResponseEntity.ok(students);
        } catch (Exception e) {
            e.printStackTrace();
            return ResponseEntity.status(500).build();
        }
    }

    // Simple test endpoint
    @GetMapping("/health-check")
    public ResponseEntity<String> testEndpoint() {
        return ResponseEntity.ok("Students endpoint is working!");
    }

    // Count endpoint
    @GetMapping("/count")
    public ResponseEntity<Long> getStudentCount() {
        try {
            List<Student> students = studentService.getAllStudents();
            return ResponseEntity.ok((long) students.size());
        } catch (Exception e) {
            e.printStackTrace();
            return ResponseEntity.status(500).body(-1L);
        }
    }

    // Get student by ID
    @GetMapping("/{id}")
    public ResponseEntity<Student> getStudentById(@PathVariable UUID id) {
        Optional<Student> student = studentService.getStudentById(id);
        return student.map(ResponseEntity::ok)
                     .orElse(ResponseEntity.notFound().build());
    }

    // Update student
    @PutMapping("/{id}")
    public ResponseEntity<Student> updateStudent(@PathVariable UUID id, @RequestBody UpdateStudentRequest request) {
        try {
            Student updated = studentService.updateProfile(
                id,
                request.getName(),
                request.getClassName(),
                request.getStudentGroup(),
                request.getEmail(),
                request.getPhone()
            );
            return ResponseEntity.ok(updated);
        } catch (RuntimeException e) {
            return ResponseEntity.notFound().build();
        }
    }

    // Delete student
    @DeleteMapping("/{id}")
    public ResponseEntity<Void> deleteStudent(@PathVariable UUID id) {
        try {
            studentService.deleteStudent(id);
            return ResponseEntity.ok().build();
        } catch (Exception e) {
            return ResponseEntity.notFound().build();
        }
    }

    // Upload face image (URL)
    @PostMapping("/{id}/face-image")
    public ResponseEntity<FaceData> uploadFaceImage(@PathVariable UUID id, @RequestBody FaceImageRequest request) {
        try {
            FaceData faceData = studentService.uploadFaceImage(id, request.getImageUrl());
            return ResponseEntity.ok(faceData);
        } catch (RuntimeException e) {
            return ResponseEntity.notFound().build();
        }
    }

    // DTOs for request bodies
    public static class CreateStudentRequest {
        private String code;
        private String name;
        private String className;
        private String studentGroup;
        private String email;
        private String phone;

        // Getters and setters
        public String getCode() { return code; }
        public void setCode(String code) { this.code = code; }
        public String getName() { return name; }
        public void setName(String name) { this.name = name; }
        public String getClassName() { return className; }
        public void setClassName(String className) { this.className = className; }
        public String getStudentGroup() { return studentGroup; }
        public void setStudentGroup(String studentGroup) { this.studentGroup = studentGroup; }
        public String getEmail() { return email; }
        public void setEmail(String email) { this.email = email; }
        public String getPhone() { return phone; }
        public void setPhone(String phone) { this.phone = phone; }
    }

    public static class UpdateStudentRequest {
        private String name;
        private String className;
        private String studentGroup;
        private String email;
        private String phone;

        // Getters and setters
        public String getName() { return name; }
        public void setName(String name) { this.name = name; }
        public String getClassName() { return className; }
        public void setClassName(String className) { this.className = className; }
        public String getStudentGroup() { return studentGroup; }
        public void setStudentGroup(String studentGroup) { this.studentGroup = studentGroup; }
        public String getEmail() { return email; }
        public void setEmail(String email) { this.email = email; }
        public String getPhone() { return phone; }
        public void setPhone(String phone) { this.phone = phone; }
    }

    public static class FaceImageRequest {
        private String imageUrl;

        public String getImageUrl() { return imageUrl; }
        public void setImageUrl(String imageUrl) { this.imageUrl = imageUrl; }
    }
}