//! Link-related AST nodes and supporting types.
//!
//! All nodes here are inline (`InlineNode` variants);
//! they live in their own module because the link model has enough surface
//! area (kinds, anchors, interwiki indirection) to warrant separation.

use std::collections::HashMap;

use super::inline::InlineNode;
use super::span::Span;

#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub enum LinkKind {
    Wiki,
    Interwiki,
    Diary,
    File,
    Local,
    Raw,
    AnchorOnly,
}

#[derive(Debug, Clone, Default, PartialEq, Eq, Hash)]
pub struct LinkTarget {
    pub kind: LinkKind,
    pub path: Option<String>,
    pub wiki_index: Option<usize>,
    pub wiki_name: Option<String>,
    pub anchor: Option<String>,
    pub is_absolute: bool,
    pub is_directory: bool,
}

impl Default for LinkKind {
    fn default() -> Self {
        Self::Wiki
    }
}

#[derive(Debug, Clone, PartialEq, Eq)]
pub struct WikiLinkNode {
    pub span: Span,
    pub target: LinkTarget,
    pub description: Option<Vec<InlineNode>>,
}

#[derive(Debug, Clone, PartialEq, Eq)]
pub struct ExternalLinkNode {
    pub span: Span,
    pub url: String,
    pub description: Option<Vec<InlineNode>>,
}

#[derive(Debug, Clone, PartialEq, Eq)]
pub struct TransclusionNode {
    pub span: Span,
    pub url: String,
    pub alt: Option<String>,
    pub attrs: HashMap<String, String>,
}

#[derive(Debug, Clone, PartialEq, Eq)]
pub struct RawUrlNode {
    pub span: Span,
    pub url: String,
}