use serde::{Deserialize, Serialize};

use crate::diagnostics::error_detection::collect_errors::detect_errors;

// structs for lsp stuff

// position / range

#[derive(Debug, Clone, Copy, Serialize, Deserialize, PartialEq, Eq)]

#[serde(rename_all = "camelCase")]

pub struct Position {

    pub line: u32,

    pub character: u32,

}

#[derive(Debug, Clone, Copy, Serialize, Deserialize, PartialEq, Eq)]

#[serde(rename_all = "camelCase")]

pub struct Range {

    pub start: Position,

    pub end: Position,

}

// the actual values can be chnaged later, if needed

#[derive(Debug, Clone, Copy, Serialize, Deserialize, PartialEq, Eq)]

#[serde(rename_all = "camelCase")]

pub enum Severity {

    Error = 1,

    Warn = 2,

    Info = 3,

    Hint = 4,

}

// the actual diagnostic struct

#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]

#[serde(rename_all = "camelCase")]

pub struct Diagnostic {

    pub range: Range,

    pub severity: Severity,

    pub message: String,

    pub source: &'static str,

}

// document symbol struct is used to denote a single token / node

// this will be used for syntax highlighting and hovering

#[derive(Debug, Clone, Copy, Serialize, Deserialize)]

#[serde(rename_all = "camelCase")]

pub enum SymbolKind {

    Integer = 0,

    Decimal = 1,

    Function = 2,

    Letting = 3,

    Find = 4,

    Variable = 5,

    Constant = 6,

    Domain = 7,

} // to be extended

// each type of token / symbol in the essence grammar will be

// assigned an integer, which would be mapped to a colour

#[derive(Debug, Clone, Serialize, Deserialize)]

#[serde(rename_all = "camelCase")]

pub struct DocumentSymbol {

    pub name: String,

    pub detail: Option<String>,

    pub kind: SymbolKind,

    pub range: Range,

    #[serde(skip_serializing_if = "Option::is_none")]

    pub children: Option<Vec<DocumentSymbol>>,

}

// getting the actual diagnostic

// get document symbols for semantic highlighting