package mdprint

import "fmt"

// Node is the interface for all AST nodes.
type Node interface{ isNode() }

// ---- block-level ----

type Heading struct{ Level int; Content []Node }
type Paragraph struct{ Content []Node }
type CodeBlock struct{ Lang, Body string }
type Blockquote struct{ Children []Node }
type List struct{ Ordered bool; Items []ListItem }
type ListItem struct{ Checked *bool; Content []Node }
type Table struct{ Headers []string; Rows [][]string }
type ThematicBreak struct{}

// ---- inline-level ----

type Text struct{ Text string }
type Bold struct{ Content []Node }
type Italic struct{ Content []Node }
type Code struct{ Text string }
type Link struct{ Content []Node; URL string }

func (Heading) isNode()       {}
func (Paragraph) isNode()     {}
func (CodeBlock) isNode()     {}
func (Blockquote) isNode()    {}
func (List) isNode()          {}
func (ListItem) isNode()      {}
func (Table) isNode()         {}
func (ThematicBreak) isNode() {}

func (Text) isNode()  {}
func (Bold) isNode()  {}
func (Italic) isNode() {}
func (Code) isNode()  {}
func (Link) isNode()  {}

// Print parses Markdown content and renders it to the terminal.
func Print(content string) {
	blocks := parseBlocks(content)
	for i, b := range blocks {
		if i > 0 {
			fmt.Println()
		}
		fmt.Print(renderNode(b))
	}
	fmt.Println()
}