#include <time.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <lcd.h>
#include <fontrender.h>
#include <httputils.h>
#include <stringutils.h>
#include <rpccommand.h>
#include <onewire.h>
#include <ds18s20.h>

#ifdef DMALLOC
#include <dmalloc.h>
#endif

void ppp_status(char *buf, int bufsize) {
	const char *STATFILE="/tmp/ppp0_status";
	FILE *file = fopen(STATFILE, "r");
	
	if (!file) {
		*buf = '\0';
		return;
	}
	
	fgets(buf, bufsize, file);
	fclose(file);
}

void wlan_getparam(const char *param, char *buf, int buflen) {
	FILE *pipe;
	char linebuf[128];
	char *p1, *p2 = buf, *endp = buf + buflen - 1;
	
	snprintf(linebuf, 127, "/bin/uci get wireless.cfg2.%s", param);
	
	pipe = popen(linebuf, "r");
	
	fgets(linebuf, 128, pipe);
	
	p1 = linebuf;
	while (!isspace(*p1) && p2 < endp)
		*(p2++) = *(p1++);
	
	*p2 = '\0';
	
	pclose(pipe);
	return;
}

int wlan_clients() {
	FILE *pipe;
	char linebuf[32] = {0};
	
	pipe = popen("/usr/sbin/wl assoclist | /usr/bin/wc -l", "r");
	fgets(linebuf, 32, pipe);
	pclose(pipe);
	
	return atoi(linebuf);
}

/* Public functions */

static char *weekdays[7] = {"ma", "ti", "ke", "to", "pe", "la", "su"};

int infoscreen_clock(unsigned char screen[LCD_H][LCD_W]) {
	char buf[32], tbuf[32];
	time_t t = time(NULL);
	struct tm *ts = localtime(&t);;
	
	strftime(buf, 32, "%H:%M:%S", ts);
	dh_malign(buf, screen[2], LCD_W);
	
	int wday;
	strftime(buf, 32, "%u", ts);
	wday = atoi(buf);
	
	strftime(tbuf, 32, "%d.%m.%Y", ts);
	snprintf(buf, 32, "%s %s", weekdays[wday - 1], tbuf);
	fr_malign(buf, screen[5], LCD_W);
	
	return 1;
}

int infoscreen_tv(unsigned char screen[LCD_H][LCD_W]) {
#define nl 32
	const int max_interval = 1800;
	static int next_update = 0;
	static char tv1[nl] = {0}, tv2[nl] = {0}, mtv3[nl] = {0}, nel[nl] = {0}, sub[nl] = {0};
	int status, timestamp = 0;
	
	if (next_update <= time(NULL)) {
		char pagedata[512] = {0};
		char update[32] = {0};
		
		status = http_getpage_async("http://kapsi.fi/~jpa/stuff/other/tvohjelmat.cgi", pagedata, 512, &timestamp);
		
		if (status > 0) {
			get_value(pagedata, "tv1", tv1, nl) || (tv1[0] = '\0');
			get_value(pagedata, "tv2", tv2, nl) || (tv2[0] = '\0');
			get_value(pagedata, "mtv", mtv3, nl) || (mtv3[0] = '\0');
			get_value(pagedata, "nel", nel, nl) || (nel[0] = '\0');
			get_value(pagedata, "sub", sub, nl) || (sub[0] = '\0');
			
			get_value(pagedata, "Update", update, 32);
			next_update = atoi(update);
			if (next_update < 60)
				next_update = 60;
			
			next_update += timestamp;
		} else if (status != HTTP_ASYNCWAIT) {
			next_update = time(NULL) + 60; // Some error occurred, wait and retry
		}
	}
	
	if (next_update + max_interval < time(NULL)) {
		tv1[0] = tv2[0] = mtv3[0] = nel[0] = sub[0] = '\0';
	}
	
	// Render titles
	int mpos = fr_textwidth("MTV3:");
	
	fr_ralign("TV1:", screen[1], mpos);
	fr_ralign("TV2:", screen[2], mpos);
	fr_ralign("MTV3:", screen[3], mpos);
	fr_ralign("Nel.:", screen[4], mpos);
	fr_ralign("Sub.:", screen[5], mpos);
	
	mpos += 2; // Space
	int maxw = LCD_W - mpos;
	
	fr_render(tv1, screen[1] + mpos, maxw);
	fr_render(tv2, screen[2] + mpos, maxw);
	fr_render(mtv3, screen[3] + mpos, maxw);
	fr_render(nel, screen[4] + mpos, maxw);
	fr_render(sub, screen[5] + mpos, maxw);
	
	return next_update;
}

int infoscreen_poytya(unsigned char screen[LCD_H][LCD_W]) {
	const int update_interval = 600;
	const int max_interval = 7200;
	static int lastupdate = 0;
	static char pagedata[256];
	int status, timestamp = 0;
	
	if (lastupdate + update_interval <= time(NULL)) {
		status = http_getpage_async("http://warri1.dyndns.org/lampotila/remtemp.txt", pagedata, 256, &timestamp);
		if (status > 0 || status != HTTP_ASYNCWAIT)
			lastupdate = timestamp;
	}
	
	if (lastupdate + max_interval < time(NULL)) {
		pagedata[0] = '\0'; // Clear data
	}
	
	char textbuf[64], valuebuf[32];
	
	/* Get updated time */
	if (get_value(pagedata, "Updated", valuebuf, 32)) {
		snprintf(textbuf, 64, "@ %s", valuebuf);
		fr_render(textbuf, screen[1], LCD_W);
	}
	
	/* Sikala */
	if (get_value(pagedata, "Ylasikala", valuebuf, 32)) {
		snprintf(textbuf, 64, "Ylä-s. %s", valuebuf);
		fr_render(textbuf, screen[3], LCD_W);
	}
	
	/* Ulkoilma */
	if (get_value(pagedata, "Ulkoilma", valuebuf, 32)) {
		snprintf(textbuf, 64, "Ulkoilma %s", valuebuf);
		fr_render(textbuf, screen[4], LCD_W);
	}
	
	/* Yläkerta */
	if (get_value(pagedata, "Ylakerta", valuebuf, 32)) {
		snprintf(textbuf, 64, "Yläkerta %s", valuebuf);
		fr_render(textbuf, screen[5], LCD_W);
	}
	
	return lastupdate + update_interval;
}

int infoscreen_tuulinen(unsigned char screen[LCD_H][LCD_W]) {
	float vesi, ulkoilma;
	
	vesi = rpc_temperature_vesi();
	ulkoilma = rpc_temperature_ulkoilma();
	
	char linebuf[32];
	
	snprintf(linebuf, 32, "Vesi: %0.1f?C", vesi);
	fr_render(linebuf, screen[1], LCD_W);

	snprintf(linebuf, 32, "Ulkoilma: %0.1f?C", ulkoilma);
	fr_render(linebuf, screen[2], LCD_W);
	
	return time(NULL) + 60;
}

int infoscreen_internet(unsigned char screen[LCD_H][LCD_W]) {
	float rx, tx, total;
	
	rpc_traffic_speeds(&rx, &tx);
	
	total = rpc_traffic_total() / 1000000.;
	
	char linebuf[32];
	
	ppp_status(linebuf, 32);
	fr_render(linebuf, screen[1], LCD_W);
	
	snprintf(linebuf, 32, "Tx: %0.1f kB/s", tx);
	fr_render(linebuf, screen[3], LCD_W);
	snprintf(linebuf, 32, "Rx: %0.1f kB/s", rx);
	fr_render(linebuf, screen[4], LCD_W);
	
	snprintf(linebuf, 32, "Yht.: %0.1f MB", total);
	fr_render(linebuf, screen[5], LCD_W);
	
	return time(NULL) + 2;
}

int infoscreen_wlan(unsigned char screen[LCD_H][LCD_W]) {
	char enckey[64], essid[32];
	char linebuf[32];
	int clients;
	
	wlan_getparam("key", enckey, 64);
	clients = wlan_clients();
	wlan_getparam("ssid", essid, 32);
	str_trimchars(essid, "\"");
	
	snprintf(linebuf, 32, "ESSID: %s", essid);
	fr_render(linebuf, screen[1], LCD_W);
	
	snprintf(linebuf, 32, "WEP: %.4s-%.4s-", enckey, enckey + 4);
	fr_render(linebuf, screen[2], LCD_W);
	
	int pos = fr_textwidth("WEP: ");
	
	snprintf(linebuf, 32, "%.4s-%.4s-", enckey + 8, enckey + 12);
	fr_render(linebuf, screen[3] + pos, LCD_W - pos);
	
	snprintf(linebuf, 32, "%.4s-%.4s-%.2s",
		 enckey + 16, enckey + 20, enckey + 24);
	fr_render(linebuf, screen[4] + pos, LCD_W - pos);
	
	snprintf(linebuf, 32, "Yhteyksiä: %d kpl", clients);
	fr_render(linebuf, screen[5], LCD_W);
	
	return time(NULL) + 10;
}

typedef struct repacontext {
	char *url;
	int lastupdate;
	char pagedata[512];
} repacontext;

int infoscreen_repa(repacontext* ctx, unsigned char screen[LCD_H][LCD_W]) {
	const int update_interval = 600;
	const int max_interval = 7200;
	int status, timestamp = 0;
	
	if (ctx->lastupdate + update_interval <= time(NULL)) {
		status = http_getpage_async(ctx->url, ctx->pagedata, 512, &timestamp);
		if (status > 0 || status != HTTP_ASYNCWAIT)
			ctx->lastupdate = timestamp;
	}

	if (ctx->lastupdate + max_interval < time(NULL)) {
		ctx->pagedata[0] = '\0';
	}

	char buf[32];
	int colw = fr_textwidth("88:88 ");
	char *line = ctx->pagedata;
	
	fr_render("Pysäk", screen[1], colw);
	fr_render("Peril", screen[1] + colw, colw);
	fr_render("Linja", screen[1] + colw * 2, LCD_W - 2 * colw);
	
	int i = 2;
	while (line != NULL && *line != 0 && i < LCD_H) {
		get_str_field(line, 0, buf, 32);
		fr_render(buf, screen[i], colw);
		
		get_str_field(line, 1, buf, 32);
		fr_render(buf, screen[i] + colw, colw);
		
		get_str_field(line, 2, buf, 32);
		fr_render(buf, screen[i] + colw * 2, LCD_W - 2 * colw);
		
		line = strchr(line + 1, '\n');
		i += 1;
	}
	
	return ctx->lastupdate + update_interval;
}

int infoscreen_repa_tamk(unsigned char screen[LCD_H][LCD_W]) {
	static repacontext ctx = {
		"http://koti.kapsi.fi/jpa/stuff/other/reittiopas/tamk.cgi",
		0, {0}};
	return infoscreen_repa(&ctx, screen);
}

int infoscreen_repa_rautatieasema(unsigned char screen[LCD_H][LCD_W]) {
	static repacontext ctx = {
		"http://koti.kapsi.fi/jpa/stuff/other/reittiopas/rautatieasema.cgi",
		0, {0}};
	return infoscreen_repa(&ctx, screen);
}

int infoscreen_repa_sorila(unsigned char screen[LCD_H][LCD_W]) {
	static repacontext ctx = {
		"http://koti.kapsi.fi/jpa/stuff/other/reittiopas/sorila.cgi",
		0, {0}};
	return infoscreen_repa(&ctx, screen);
}

int infoscreen_lampotila(unsigned char screen[LCD_H][LCD_W]) {
	const int update_interval = 60;
	static int last_update = 0;
	static float temperature = 0.0;
	
	if (last_update + update_interval < time(NULL)) {
		const struct owaddr addr = {
			0x10, {0xec, 0x5d, 0x0f, 0x01, 0x08, 0x00}, 0x91};
		
		ow_matchrom(&addr);
		temperature = ds18s20_temperature(&addr);
		last_update = time(NULL);
	}
	
	char linebuf[32];
	snprintf(linebuf, 32, "  %0.1f°C", temperature);
	
	fr_render("Sisäilma:", screen[1], LCD_W);
	fr_render(linebuf, screen[2], LCD_W);
	
	return last_update + update_interval;
}