import { Body, Post, Route, Tags, SuccessResponse, Response, Example, Controller } from 'tsoa';
import { AuthService } from '../services/auth.service';
import {
    LoginRequest,
    RegisterRequest,
    RefreshTokenRequest,
    LoginResponse,
    RegisterResponse,
    RefreshTokenResponse
} from '../types/auth.types';
import { loginSchema, registerSchema, refreshTokenSchema } from '../validators/auth.validator';
import { ValidationError } from '../middleware/errorHandler';

@Route('api/auth')
@Tags('Authentication')
export class AuthController {
    private authService = new AuthService();

    /**
     * User login
     * @summary Login with email and password
     * @param body Login credentials
     * @returns JWT token and user information
     */
    @Post('login')
    @SuccessResponse('200', 'Login successful')
    @Response('401', 'Invalid credentials')
    @Example<LoginResponse>({
        token: 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...',
        refreshToken: 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...',
        user: {
            id: 1,
            username: 'admin',
            email: 'admin@elearning.local',
            role: {
                code: 'ADMIN',
                name: {
                    th: 'ผู้ดูแลระบบ',
                    en: 'Administrator'
                }
            },
            profile: {
                prefix: {
                    th: 'นาย',
                    en: 'Mr.'
                },
                first_name: 'Admin',
                last_name: 'User',
                avatar_url: undefined
            }
        }
    })
    public async login(@Body() body: LoginRequest): Promise<LoginResponse> {
        // Validate input
        const { error, value } = loginSchema.validate(body);

        if (error) {
            throw new ValidationError(error.details[0].message);
        }

        return await this.authService.login(body);
    }

    /**
     * User registration
     * @summary Register a new student account
     * @param body Registration data
     * @returns Created user information
     */
    @Post('register')
    @SuccessResponse('201', 'Registration successful')
    @Response('400', 'Validation error')
    @Response('409', 'Username or email already exists')
    @Example<RegisterResponse>({
        user: {
            id: 4,
            username: 'newstudent',
            email: 'student@example.com',
            role: {
                code: 'STUDENT',
                name: {
                    th: 'นักเรียน',
                    en: 'Student'
                }
            },
            profile: {
                prefix: {
                    th: 'นาย',
                    en: 'Mr.'
                },
                first_name: 'John',
                last_name: 'Doe'
            }
        },
        message: 'Registration successful'
    })
    public async register(@Body() body: RegisterRequest): Promise<RegisterResponse> {
        // Validate input
        const { error } = registerSchema.validate(body);
        if (error) {
            throw new ValidationError(error.details[0].message);
        }

        return await this.authService.register(body);
    }

    /**
     * Refresh access token
     * @summary Get a new access token using refresh token
     * @param body Refresh token
     * @returns New access token and refresh token
     */
    @Post('refresh')
    @SuccessResponse('200', 'Token refreshed')
    @Response('401', 'Invalid or expired refresh token')
    @Example<RefreshTokenResponse>({
        token: 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...',
        refreshToken: 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...'
    })
    public async refreshToken(@Body() body: RefreshTokenRequest): Promise<RefreshTokenResponse> {
        // Validate input
        const { error } = refreshTokenSchema.validate(body);
        if (error) {
            throw new ValidationError(error.details[0].message);
        }

        return await this.authService.refreshToken(body.refreshToken);
    }
}