#include <stdio.h>
#include <unistd.h>

#include "mem.h"
#include "dom.h"
#include "tags.h"

static void node_print(const struct node *n, const char *prefix, int last)
{
	const char *connector = last ? "└── " : "├── ";
	const char *extension = last ? "    " : "│   ";
	char new_prefix[256];
	struct node *c;

	printf("%s%s", prefix, connector);

	if (n->tag == TAG_TEXT)
		printf("%.*s\n", (int)n->textlen, n->text);
	else
		printf("%s\n", tag_to_str(n->tag));

	snprintf(new_prefix, sizeof(new_prefix), "%s%s", prefix, extension);

	for (c = n->first_child; c; c = c->next_sibling)
		node_print(c, new_prefix, c->next_sibling == NULL);
}

void dom_print(const struct node *root)
{
	struct node *c;

	printf("%s\n", tag_to_str(root->tag));
	for (c = root->first_child; c; c = c->next_sibling)
		node_print(c, "", c->next_sibling == NULL);
}

int main(int argc, char *argv[])
{
	struct node *root;

	if (argc < 2)
		errx(1, "usage: glacier <file>");

	unveil(argv[1], "r");
	unveil(NULL, NULL);
	pledge("stdio rpath", NULL);

	FILE *file;
	char *html;
	long len;

	file = fopen("test.html", "rb");
	fseek(file, 0, SEEK_END);
	len = ftell(file);
	fseek(file, 0, SEEK_SET);

	html = MALLOC((size_t)len + 1);
	fread(html, 1, len, file);
	html[len] = '\0';
	fclose(file);

	root = dom_init(html);
	dom_print(root);

	dom_free();
	free(html);

	return 0;
}