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use crate::pos::Positioned;
use std::collections::BTreeMap;

#[derive(Clone, Debug)]
#[allow(missing_docs)]
pub enum Value {
    Null,
    Int(i64),
    Float(f64),
    String(String),
    Boolean(bool),
    Enum(String),
    List(Vec<Value>),
    Object(BTreeMap<String, Value>),
}

#[derive(Debug, PartialEq)]
pub enum Type {
    Named(String),
    List(Box<Type>),
    NonNull(Box<Type>),
}

#[derive(Debug)]
pub struct Document {
    pub definitions: Vec<Positioned<Definition>>,
}

#[derive(Debug)]
pub enum Definition {
    SchemaDefinition(Positioned<SchemaDefinition>),
    TypeDefinition(Positioned<TypeDefinition>),
    DirectiveDefinition(Positioned<DirectiveDefinition>),
}

#[derive(Debug)]
pub struct SchemaDefinition {
    pub extend: bool,
    pub directives: Vec<Positioned<Directive>>,
    pub query: Option<Positioned<String>>,
    pub mutation: Option<Positioned<String>>,
    pub subscription: Option<Positioned<String>>,
}

#[derive(Debug)]
pub enum TypeDefinition {
    Scalar(Positioned<ScalarType>),
    Object(Positioned<ObjectType>),
    Interface(Positioned<InterfaceType>),
    Union(Positioned<UnionType>),
    Enum(Positioned<EnumType>),
    InputObject(Positioned<InputObjectType>),
}

#[derive(Debug)]
pub struct ScalarType {
    pub extend: bool,
    pub description: Option<Positioned<String>>,
    pub name: Positioned<String>,
    pub directives: Vec<Positioned<Directive>>,
}

#[derive(Debug)]
pub struct ObjectType {
    pub extend: bool,
    pub description: Option<Positioned<String>>,
    pub name: Positioned<String>,
    pub implements_interfaces: Vec<Positioned<String>>,
    pub directives: Vec<Positioned<Directive>>,
    pub fields: Vec<Positioned<Field>>,
}

#[derive(Debug)]
pub struct Field {
    pub description: Option<Positioned<String>>,
    pub name: Positioned<String>,
    pub arguments: Vec<Positioned<InputValue>>,
    pub ty: Positioned<Type>,
    pub directives: Vec<Positioned<Directive>>,
}

#[derive(Debug)]
pub struct InputValue {
    pub description: Option<Positioned<String>>,
    pub name: Positioned<String>,
    pub ty: Positioned<Type>,
    pub default_value: Option<Positioned<Value>>,
    pub directives: Vec<Positioned<Directive>>,
}

#[derive(Debug)]
pub struct InterfaceType {
    pub extend: bool,
    pub description: Option<Positioned<String>>,
    pub name: Positioned<String>,
    pub implements_interfaces: Vec<Positioned<String>>,
    pub directives: Vec<Positioned<Directive>>,
    pub fields: Vec<Positioned<Field>>,
}

#[derive(Debug)]
pub struct UnionType {
    pub extend: bool,
    pub description: Option<Positioned<String>>,
    pub name: Positioned<String>,
    pub directives: Vec<Positioned<Directive>>,
    pub members: Vec<Positioned<String>>,
}

#[derive(Debug)]
pub struct EnumType {
    pub extend: bool,
    pub description: Option<Positioned<String>>,
    pub name: Positioned<String>,
    pub directives: Vec<Positioned<Directive>>,
    pub values: Vec<Positioned<EnumValue>>,
}

#[derive(Debug)]
pub struct EnumValue {
    pub description: Option<Positioned<String>>,
    pub name: Positioned<String>,
    pub directives: Vec<Positioned<Directive>>,
}

#[derive(Debug)]
pub struct InputObjectType {
    pub extend: bool,
    pub description: Option<Positioned<String>>,
    pub name: Positioned<String>,
    pub directives: Vec<Positioned<Directive>>,
    pub fields: Vec<Positioned<InputValue>>,
}

#[derive(Debug)]
pub enum DirectiveLocation {
    // executable
    Query,
    Mutation,
    Subscription,
    Field,
    FragmentDefinition,
    FragmentSpread,
    InlineFragment,

    // type_system
    Schema,
    Scalar,
    Object,
    FieldDefinition,
    ArgumentDefinition,
    Interface,
    Union,
    Enum,
    EnumValue,
    InputObject,
    InputFieldDefinition,
}

#[derive(Debug)]
pub struct DirectiveDefinition {
    pub description: Option<Positioned<String>>,
    pub name: Positioned<String>,
    pub arguments: Vec<Positioned<InputValue>>,
    pub locations: Vec<Positioned<DirectiveLocation>>,
}

#[derive(Debug)]
pub struct Directive {
    pub name: Positioned<String>,
    pub arguments: Vec<(Positioned<String>, Positioned<Value>)>,
}