use crate::name_analysis::symbol::parameter_symbol::ParameterSymbol;
use crate::name_analysis::symbol::source_definition::SourceDefinition;
use crate::name_analysis::symbol::type_symbol::ConcreteTypeSymbol;
use std::fmt::{Debug, Formatter};

#[derive(Clone)]
pub struct FunctionSymbol {
    fqn: String,
    declared_name: String,
    is_public: bool,
    is_platform: bool,
    source_definition: Option<SourceDefinition>,
    parameters: Vec<ParameterSymbol>,
    return_type: Option<ConcreteTypeSymbol>, // todo: can we use TypeSymbol?
}

impl FunctionSymbol {
    pub fn without_parameters_or_return_type(
        fqn: &str,
        declared_name: &str,
        is_public: bool,
        is_platform: bool,
        source_definition: Option<SourceDefinition>,
    ) -> FunctionSymbol {
        FunctionSymbol {
            fqn: fqn.to_string(),
            declared_name: declared_name.to_string(),
            is_public,
            is_platform,
            source_definition,
            parameters: Vec::new(),
            return_type: None,
        }
    }

    pub fn with_parameters(self, parameters: Vec<ParameterSymbol>) -> Self {
        Self {
            fqn: self.fqn,
            declared_name: self.declared_name,
            is_public: self.is_public,
            is_platform: self.is_platform,
            source_definition: self.source_definition,
            parameters,
            return_type: self.return_type,
        }
    }

    pub fn with_return_type(self, return_type: ConcreteTypeSymbol) -> Self {
        Self {
            fqn: self.fqn,
            declared_name: self.declared_name,
            is_public: self.is_public,
            is_platform: self.is_platform,
            source_definition: self.source_definition,
            parameters: self.parameters,
            return_type: Some(return_type),
        }
    }

    pub fn fqn(&self) -> &str {
        &self.fqn
    }

    pub fn declared_name(&self) -> &str {
        &self.declared_name
    }

    pub fn is_public(&self) -> bool {
        self.is_public
    }

    pub fn is_platform(&self) -> bool {
        self.is_platform
    }

    pub fn source_definition(&self) -> Option<&SourceDefinition> {
        self.source_definition.as_ref()
    }

    pub fn parameters(&self) -> &[ParameterSymbol] {
        &self.parameters
    }

    pub fn return_type(&self) -> Option<&ConcreteTypeSymbol> {
        self.return_type.as_ref()
    }
}

impl Debug for FunctionSymbol {
    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
        f.debug_struct("FunctionSymbol")
            .field("fqn", &self.fqn)
            .field("declared_name", &self.declared_name)
            .field("is_public", &self.is_public)
            .field("is_platform", &self.is_platform)
            .field("parameters", &self.parameters)
            .field("return_type", &self.return_type)
            .field("source_definition", &self.source_definition)
            .finish()
    }
}