import { ref } from 'vue'

const getStoredToken = () => {
    try {
        return localStorage.getItem('k9t_token')
    } catch (e) {
        return null
    }
}

const token = ref(getStoredToken())
const user = ref(null)


const API_URL = import.meta.env.PROD ? '/api' : 'http://localhost:8000/api'

export const useAuth = () => {
    const login = () => {
        window.location.href = `${API_URL}/auth/google/login`
    }

    const logout = async () => {
        try {
            if (token.value) {
                await fetch(`${API_URL}/auth/logout`, {
                    method: 'POST',
                    headers: {
                        'Authorization': `Bearer ${token.value}`
                    }
                })
            }
        } catch (e) {
            console.error("Logout backend call failed", e)
        } finally {
            token.value = null
            user.value = null
            localStorage.removeItem('k9t_token')
            window.location.reload()
        }
    }

    const setToken = (newToken) => {
        token.value = newToken
        localStorage.setItem('k9t_token', newToken)
    }

    const fetchProfile = async () => {
        if (!token.value) return null
        try {
            const response = await fetch(`${API_URL}/user/profile`, {
                headers: {
                    'Authorization': `Bearer ${token.value}`
                }
            })
            if (response.ok) {
                const data = await response.json()
                user.value = data
                return data
            } else {
                if (response.status === 401) {
                    logout()
                }
            }
        } catch (error) {
            console.error('Failed to fetch profile:', error)
        }
        return null
    }

    return {
        token,
        user,
        login,
        logout,
        setToken,
        fetchProfile,
        isAuthenticated: () => !!token.value
    }
}

// Global instance for interceptors if needed
export const auth = useAuth()