use serde::{Deserialize, Serialize};
use chrono::{DateTime, Utc};
use crate::GeoffreyDatabaseModel;

pub enum Permissions {
    ModelGet = 0,
    ModelPost,
    Command,
    ModCommand,
    Admin,
}

#[derive(Serialize, Deserialize, Debug, Clone)]
struct Token {
    pub id: Option<u64>,
    permission: u64,
    pub created: DateTime<Utc>,
    pub modified: DateTime<Utc>
}

impl Token {
    pub fn new() -> Self {
        Self {
            id: None,
            permission: 0,
            created: Utc::now(),
            modified: Utc::now()
        }
    }

    pub fn set_permission(&mut self, permission: Permissions) {
        self.permission = self.permission | (1u64 << permission as u32);
    }

    pub fn clear_permission(&mut self, permission: Permissions) {
        self.permission = self.permission & !(1u64 << permission as u32);
    }

    pub fn check_permission(&self, permission: Permissions) -> bool {
        (self.permission >> permission as u32) & 0x1u64 == 0x1u64
    }

    pub fn clear_all_permission(&mut self) {
        self.permission = 0x0u64;
    }
}

impl GeoffreyDatabaseModel for Token {
    fn id(&self) -> Option<u64> {
        self.id
    }

    fn set_id(&mut self, id: u64) {
        self.id = Some(id);
    }

    fn tree() -> String {
        "token".to_string()
    }
}

impl PartialEq for Token {
    fn eq(&self, other: &Self) -> bool {
        self.permission == other.permission
    }
}

#[cfg(test)]
mod tests {
    use crate::models::token::{Token, Permissions};

    #[test]
    fn test_token() {
        let mut token = Token::new(0);

        token.set_permission(Permissions::ModelGet);
        assert_eq!(token.permission, 0x1u64);

        token.set_permission(Permissions::ModelPost);
        assert_eq!(token.permission, 0x3u64);

    }
}