use crate::ns::*;
use serde::{Serialize, Deserialize};

#[derive(Clone, Serialize, Deserialize)]
pub enum Attribute {
    Metadata(Rc<Metadata>),
    Expression(Rc<Expression>),
    Public(Location),
    Private(Location),
    Protected(Location),
    Internal(Location),
    Final(Location),
    Native(Location),
    Static(Location),
    Abstract(Location),
    Override(Location),
    Dynamic(Location),
}

#[derive(Clone, Serialize, Deserialize)]
pub struct Metadata {
    pub location: Location,
    pub asdoc: Option<Rc<AsDoc>>,
    pub name: (String, Location),
    pub entries: Option<Vec<Rc<MetadataEntry>>>,
}

#[derive(Clone, Serialize, Deserialize)]
pub struct MetadataEntry {
    pub location: Location,
    pub key: Option<(String, Location)>,
    pub value: Rc<MetadataValue>,
}

#[derive(Clone, Serialize, Deserialize)]
pub enum MetadataValue {
    IdentifierString((String, Location)),
    String((String, Location)),
}

impl MetadataValue {
    pub fn location(&self) -> Location {
        match self {
            Self::IdentifierString((_, l)) => l.clone(),
            Self::String((_, l)) => l.clone(),
        }
    }
}

impl Attribute {
    pub fn location(&self) -> Location {
        match self {
            Self::Expression(m) => m.location(),
            Self::Metadata(m) => m.location.clone(),
            Self::Public(a) => a.clone(),
            Self::Private(a) => a.clone(),
            Self::Protected(a) => a.clone(),
            Self::Internal(a) => a.clone(),
            Self::Final(a) => a.clone(),
            Self::Native(a) => a.clone(),
            Self::Static(a) => a.clone(),
            Self::Abstract(a) => a.clone(),
            Self::Override(a) => a.clone(),
            Self::Dynamic(a) => a.clone(),
        }
    }

    pub fn has_access_modifier(list: &[Attribute]) -> bool {
        for a in list {
            match a {
                Self::Expression(_) |
                Self::Public(_) |
                Self::Private(_) |
                Self::Protected(_) |
                Self::Internal(_) => return true,
                _ => {}
            }
        }
        false
    }

    pub fn remove_metadata(list: &mut Vec<Attribute>, metadata: &Rc<Metadata>) {
        for i in 0..list.len() {
            if let Attribute::Metadata(metadata_1) = &list[i] {
                if Rc::ptr_eq(&metadata_1, metadata) {
                    list.remove(i);
                    break;
                }
            }
        }
    }

    pub fn find_metadata(list: &[Attribute]) -> Vec<Rc<Metadata>> {
        let mut r = vec![];
        for a in list {
            match &a {
                Self::Metadata(e) => {
                    r.push(e.clone());
                },
                _ => {},
            }
        }
        r
    }
    pub fn find_expression(list: &[Attribute]) -> Option<Rc<Expression>> { for a in list { match &a { Self::Expression(e) => return Some(e.clone()), _ => {} } }; None }
    pub fn find_public(list: &[Attribute]) -> Option<Location> { for a in list { match &a { Self::Public(l) => return Some(l.clone()), _ => {} } }; None }
    pub fn find_private(list: &[Attribute]) -> Option<Location> { for a in list { match &a { Self::Private(l) => return Some(l.clone()), _ => {} } }; None }
    pub fn find_protected(list: &[Attribute]) -> Option<Location> { for a in list { match &a { Self::Protected(l) => return Some(l.clone()), _ => {} } }; None }
    pub fn find_internal(list: &[Attribute]) -> Option<Location> { for a in list { match &a { Self::Internal(l) => return Some(l.clone()), _ => {} } }; None }
    pub fn find_final(list: &[Attribute]) -> Option<Location> { for a in list { match &a { Self::Final(l) => return Some(l.clone()), _ => {} } }; None }
    pub fn find_native(list: &[Attribute]) -> Option<Location> { for a in list { match &a { Self::Native(l) => return Some(l.clone()), _ => {} } }; None }
    pub fn find_static(list: &[Attribute]) -> Option<Location> { for a in list { match &a { Self::Static(l) => return Some(l.clone()), _ => {} } }; None }
    pub fn find_abstract(list: &[Attribute]) -> Option<Location> { for a in list { match &a { Self::Abstract(l) => return Some(l.clone()), _ => {} } }; None }
    pub fn find_override(list: &[Attribute]) -> Option<Location> { for a in list { match &a { Self::Override(l) => return Some(l.clone()), _ => {} } }; None }
    pub fn find_dynamic(list: &[Attribute]) -> Option<Location> { for a in list { match &a { Self::Dynamic(l) => return Some(l.clone()), _ => {} } }; None }

    pub fn has(list: &[Attribute], attribute: &Attribute) -> bool {
        match attribute {
            Self::Public(_) => Self::find_public(list).is_some(),
            Self::Private(_) => Self::find_private(list).is_some(),
            Self::Protected(_) => Self::find_protected(list).is_some(),
            Self::Internal(_) => Self::find_internal(list).is_some(),
            Self::Final(_) => Self::find_final(list).is_some(),
            Self::Native(_) => Self::find_native(list).is_some(),
            Self::Static(_) => Self::find_static(list).is_some(),
            Self::Abstract(_) => Self::find_abstract(list).is_some(),
            Self::Override(_) => Self::find_override(list).is_some(),
            Self::Dynamic(_) => Self::find_dynamic(list).is_some(),
            _ => false,
        }
    }

    pub fn is_duplicate_access_modifier(list: &[Attribute], attribute: &Attribute) -> bool {
        match attribute {
            Self::Expression(_) |
            Self::Public(_) |
            Self::Private(_) |
            Self::Protected(_) |
            Self::Internal(_) => Self::find_expression(list).is_some() || Self::find_public(list).is_some() || Self::find_private(list).is_some() || Self::find_protected(list).is_some() || Self::find_internal(list).is_some(),
            _ => false,
        }
    }

    pub fn is_metadata(&self) -> bool { matches!(self, Self::Metadata(_)) }
    pub fn is_public(&self) -> bool { matches!(self, Self::Public(_)) }
    pub fn is_private(&self) -> bool { matches!(self, Self::Private(_)) }
    pub fn is_protected(&self) -> bool { matches!(self, Self::Protected(_)) }
    pub fn is_internal(&self) -> bool { matches!(self, Self::Internal(_)) }
    pub fn is_final(&self) -> bool { matches!(self, Self::Final(_)) }
    pub fn is_native(&self) -> bool { matches!(self, Self::Native(_)) }
    pub fn is_static(&self) -> bool { matches!(self, Self::Static(_)) }
    pub fn is_abstract(&self) -> bool { matches!(self, Self::Abstract(_)) }
    pub fn is_override(&self) -> bool { matches!(self, Self::Override(_)) }
    pub fn is_dynamic(&self) -> bool { matches!(self, Self::Dynamic(_)) }

    pub fn from_identifier_name(name: &str, location: &Location) -> Option<Attribute> {
        if location.character_count() != name.chars().count() {
            return None;
        }
        match name.as_ref() {
            "final" => Some(Attribute::Final(location.clone())),
            "native" => Some(Attribute::Native(location.clone())),
            "static" => Some(Attribute::Static(location.clone())),
            "abstract" => Some(Attribute::Abstract(location.clone())),
            "override" => Some(Attribute::Override(location.clone())),
            "dynamic" => Some(Attribute::Dynamic(location.clone())),
            _ => None,
        }
    }
}