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

#include "httpd.h"
#include "httpd-utils.h"
#include "cgi-espfs.h"

extern unsigned char espfs_image[];
extern unsigned int espfs_image_len;

httpd_thread_handle_t *s_serverHandle = NULL;

struct SharedData {
  int visits;
};

static struct SharedData shared = {};

struct RequestData {
  int counter;
};

/** "About" page */
httpd_cgi_state templateReplacer(HttpdConnData *conn, const char *token)
{
    struct RequestData *rd;

    if (!token) {
        if (conn->userData) {
            httpdPlatFree(conn->userData);
            conn->userData = NULL;
        }
        return HTTPD_CGI_DONE;
    }

    if (!conn->userData) {
        rd = httpdPlatMalloc(sizeof(struct RequestData));
        conn->userData = rd;
        rd->counter = 0;

        shared.visits++;
    } else {
        rd = conn->userData;
    }

    char buf[100];

    if (streq(token, "visits")) {
        sprintf(buf, "%d", shared.visits);
        tplSend(conn, buf);
    }
    else if (streq(token, "html1")) {
        tplSend(conn, "<a href=\"foo\">foo</a>");
    }
    else if (streq(token, "html2")) {
        tplSend(conn, "<a href=\"bar\">bar</a>");
    }
    else if (streq(token, "json1")) {
        tplSend(conn, "\"hello\":\"foo<angle>'' and backslash\\ \" also crlf \r\n");
    }
    else if (streq(token, "multipart")) {
        if (rd->counter < 100) {
            sprintf(buf, "HELLO %d, ", rd->counter);
            tplSend(conn, buf);
            rd->counter++;
            return HTTPD_CGI_MORE;
        }
        tplSend(conn, "and that's it.");
    }
    else {
        return HTTPD_CGI_NOTFOUND;
    }

    return HTTPD_CGI_DONE;
}


/**
 * Application routes
 */
const HttpdBuiltInUrl routes[] = {
        // TODO password lock ...

        // --- Web pages ---
//        ROUTE_TPL_FILE("/", tplIndex, "/index.tpl"),
        ROUTE_FILE("/", "index.html"),
        ROUTE_TPL_FILE("/tpl", templateReplacer, "template.tpl.txt"),

        ROUTE_FILESYSTEM(),
        ROUTE_END(),
};

void sigpipe_handler(int unused)
{
}

void handle_sigint(int signum)
{
   fprintf(stderr, " SIGINT detected, shutting down HTTPD\n");
   httpdShutdown(s_serverHandle);
}

int main()
{
    struct sigaction action;
    memset(&action, 0, sizeof(action));
    action.sa_handler = handle_sigint;
    sigaction(SIGINT, &action, NULL);

    // prevent abort on sigpipe
    sigaction(SIGPIPE, &(struct sigaction) {{sigpipe_handler}}, NULL);

    struct httpd_options opts = {
            .port = 8080,
    };

    s_serverHandle = httpdStart(routes, &opts);
    httpdSetName("SpriteHTTPD Server Demo");

    httpdJoin(s_serverHandle);
    return 0;
}

int httpdPlatEspfsRead(void *dest, uint32_t offset, size_t len)
{
    if (offset + len > espfs_image_len) {
        return -1;
    }

    memcpy(dest, &espfs_image[offset], len);
    return 0;
}