import { UserProfile } from '../types';

export class AuthService {
  static async login(id: string, pin: string): Promise<{ user: UserProfile; customToken?: string }> {
    const response = await fetch('/api/auth/login', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ id, pin })
    });

    if (!response.ok) {
      const errData = await response.json().catch(() => ({}));
      throw new Error(errData.error || 'Invalid Student ID or PIN.');
    }

    return await response.json();
  }

  static async loginWithEmail(email: string, password: string): Promise<{ user: UserProfile; customToken?: string }> {
    const response = await fetch('/api/auth/login-email', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ email, password })
    });

    if (!response.ok) {
      const errData = await response.json().catch(() => ({}));
      throw new Error(errData.error || 'Invalid Email address or Password.');
    }

    return await response.json();
  }

  static async registerStudent(data: { fullName: string; class: string; department?: string; pin: string }): Promise<{ user: UserProfile; customToken?: string }> {
    const response = await fetch('/api/auth/register/student', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify(data)
    });

    if (!response.ok) {
      const errData = await response.json().catch(() => ({}));
      throw new Error(errData.error || 'Student registration failed.');
    }

    return await response.json();
  }

  static async registerStudentWithEmail(data: { fullName: string; class: string; department?: string; email: string; password: string }): Promise<{ user: UserProfile; customToken?: string }> {
    const response = await fetch('/api/auth/register/student-email', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify(data)
    });

    if (!response.ok) {
      const errData = await response.json().catch(() => ({}));
      throw new Error(errData.error || 'Student Email registration failed.');
    }

    return await response.json();
  }

  static async registerTeacher(data: { fullName: string; subject: string; position: string; classesManaged: string[]; pin: string }): Promise<{ user: UserProfile; customToken?: string }> {
    const response = await fetch('/api/auth/register/teacher', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify(data)
    });

    if (!response.ok) {
      const errData = await response.json().catch(() => ({}));
      throw new Error(errData.error || 'Teacher registration failed.');
    }

    return await response.json();
  }

  static async registerTeacherWithEmail(data: { fullName: string; subject: string; position: string; classesManaged: string[]; email: string; password: string }): Promise<{ user: UserProfile; customToken?: string }> {
    const response = await fetch('/api/auth/register/teacher-email', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify(data)
    });

    if (!response.ok) {
      const errData = await response.json().catch(() => ({}));
      throw new Error(errData.error || 'Teacher Email registration failed.');
    }

    return await response.json();
  }
}