#include "dat.h"
#include "fn.h"

/* Candidates are the space-separated words of the value; the reading itself
 * is a candidate only for the emoji dictionary. */
void
dictlookup(Dictreq *req, Dictres *res)
{
	Lang *l;
	char *p, *e, *sp;
	Str tmp;
	int vlen;

	res->key = req->pre;
	res->nkouho = 0;
	res->lang = req->lang;
	res->seq = req->seq;
	l = getlang(req->lang);
	if(req->key.n == 0 || l == nil ||
	   trielookup(l->dict, &req->key, &p, &vlen) != TrieExact)
		return;
	e = p + vlen;
	while(res->nkouho < Maxkouho && p < e){
		while(p < e && *p == ' ')
			p++;
		sp = p;
		while(p < e && *p != ' ')
			p++;
		if(sinit(&tmp, sp, p - sp) && tmp.n > 0 &&
		   (req->lang == LangEMOJI || scmp(&tmp, &req->key) != 0))
			res->kouho[res->nkouho++] = tmp;
	}
}

void
dictthread(void*)
{
	Dictreq req;
	static Dictres res;

	threadsetname("dict");
	for(;;){
		if(chanrecv(dictreqc, &req) < 0)
			break;
		while(channbrecv(dictreqc, &req) > 0)
			;
		dictlookup(&req, &res);
		chansend(dictresc, &res);
	}
}

static Trie*
langopen(char *dir, char *name, char *ext)
{
	char *path;
	Trie *t;

	path = smprint("%s/%s.%s", dir, name, ext);
	if(path == nil)
		die("out of memory");
	t = trieopen(path);
	free(path);
	return t;
}

void
langinit(char *dir)
{
	Lang *l;

	for(l = langs; l < langs + nlang; l++){
		if(l->mapname != nil)
			l->map = langopen(dir, l->mapname, "map");
		if(l->dictname != nil)
			l->dict = langopen(dir, l->dictname, "dict");
	}
}