export async function isSubscribed(channelId, addAlert) {
    const token = localStorage.getItem('token');
    if (!token) {
        return;
    }

    const headers = {
        Authorization: `Bearer ${token}`
    };

    const request = await fetch(`/api/users/${channelId}/channel/subscribed`, { headers })
    const result = await request.json();

    console.log("Subscription status for channel ID", channelId, ":", result);
    return result.subscribed;
}

export async function getChannel(userId, token, addAlert) {
    try {
        const response = await fetch(`/api/users/${userId}/channel`, {
            method: "GET",
            headers: {
                "Authorization": `Bearer ${token}`,
            }
        });
        if (!response.ok) {
            throw new Error("Failed to fetch user data");
        }
        const data = await response.json();
        return data
    } catch (error) {
        console.error("Error fetching user channel:", error);
        addAlert('error', "Erreur lors de la récupération des données de l'utilisateur.");
        return null;
    }
}

export async function getUserHistory(userId, token, addAlert) {
    if (!userId || !token) {
        console.warn("User ID or token missing, skipping history fetch");
        return;
    }
    try {
        const response = await fetch(`/api/users/${userId}/history`, {
            method: "GET",
            headers: {
                "Authorization": `Bearer ${token}`,
            }
        });
        if (!response.ok) {
            throw new Error("Failed to fetch user history");
        }
        const data = await response.json();
        return data
    } catch (error) {
        console.error("Error fetching user history:", error);
        addAlert('error', "Erreur lors de la récupération de l'historique de l'utilisateur.");
    }
}

export async function getPlaylists(userId, token, addAlert) {
    if (!userId || !token) {
        console.warn("User ID or token missing, skipping playlists fetch");
        return;
    }
    try {
        const response = await fetch(`/api/playlists/user/${userId}`, {
            method: "GET",
            headers: {
                "Authorization": `Bearer ${token}`,
            }
        });
        if (!response.ok) {
            throw new Error("Failed to fetch user playlists");
        }
        const data = await response.json();
        return data;
    } catch (error) {
        console.error("Error fetching user playlists:", error);
        addAlert('error', "Erreur lors de la récupération des playlists de l'utilisateur.");
    }
}

export async function updateUser(userId, token, userData, addAlert) {
    try {
        const response = await fetch(`/api/users/${userId}`, {
            method: "PUT",
            headers: {
                "Authorization": `Bearer ${token}`,
                "Content-Type": "application/json"
            },
            body: JSON.stringify(userData)
        });
        if (!response.ok) {
            throw new Error("Failed to update user");
        }
        const data = await response.json();
        return data;
    } catch (error) {
        console.error("Error updating user:", error);
        addAlert('error', "Erreur lors de la mise à jour des données de l'utilisateur.");
    }
}

export async function verifyEmail(email, token, addAlert) {
    try {
        const response = await fetch('/api/users/verify-email', {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json'
            },
            body: JSON.stringify({ email, token })
        });

        if (!response.ok) {
            throw new Error("Failed to verify email");
        }

        const data = await response.json();
        return true;
    } catch (error) {
        console.error("Error verifying email:", error);
        addAlert('error', "Erreur lors de la vérification de l'email.");
    }
}

export async function searchByUsername(username, token, addAlert) {
    try {
        const response = await fetch(`/api/users/search?username=${encodeURIComponent(username)}`, {
            method: "GET",
            headers: {
                "Authorization": `Bearer ${token}`,
            }
        });
        if (!response.ok) {
            throw new Error("Failed to search user");
        }
        const data = await response.json();
        return data;
    } catch (error) {
        console.error("Error searching user by username:", error);
        addAlert('error', "Erreur lors de la recherche de l'utilisateur.");
    }
}