/**
 * sesimos - secure, simple, modern web server
 * @brief FastCGI frame handler
 * @file src/worker/fastcgi_frame_handler.c
 * @author Lorenz Stechauner
 * @date 2023-01-22
 */

#include "func.h"
#include "../lib/fastcgi.h"
#include "../logger.h"
#include "../workers.h"

#include <errno.h>
#include <memory.h>
#include <unistd.h>

void fastcgi_frame_handler_func(fastcgi_ctx_t *ctx) {
    logger_set_prefix("%s", ctx->log_prefix);
    int64_t val = 0;

    switch (fastcgi_recv_frame(&ctx->cnx)) {
        case FCGI_STDOUT:
        case FCGI_STDERR:
            fastcgi_handle_frame(ctx);
            break;
        case -1:
            error("Unable to receive FastCGI frame");
            val = -1;
        default:
            // end of request received
            write(ctx->cnx.fd_out, &val, sizeof(val));
            fastcgi_close(ctx);
    }
}

int fastcgi_handle_connection(client_ctx_t *ctx, fastcgi_cnx_t **cnx) {
    sock_set_timeout(&(*cnx)->socket, FASTCGI_TIMEOUT);
    sock_set_socket_timeout(&(*cnx)->socket, FASTCGI_SOCKET_TIMEOUT);

    fastcgi_ctx_t *a = malloc(sizeof(fastcgi_ctx_t));
    a->closed = 0;
    snprintf(a->log_prefix, sizeof(a->log_prefix), "[%*s]%s", ADDRSTRLEN, ctx->socket.s_addr, ctx->log_prefix);
    memcpy(&a->cnx, *cnx, sizeof(fastcgi_cnx_t));
    ctx->fcgi_ctx = a;
    fastcgi_handle_frame(a);
    *cnx = &a->cnx;

    return 0;
}

void fastcgi_close(fastcgi_ctx_t *ctx) {
    ctx->closed++;
    if (ctx->closed != 2)
        return;

    logger_set_prefix("%s", ctx->log_prefix);

    fastcgi_php_error(&ctx->cnx, NULL);

    if (ctx->cnx.app_status != 0)
        error("FastCGI app terminated with exit code %i", ctx->cnx.app_status);

    debug("Closing FastCGI connection");

    fastcgi_close_cnx(&ctx->cnx);
    free(ctx);
    errno = 0;
}

void fastcgi_close_error(fastcgi_ctx_t *ctx) {
    logger_set_prefix("%s", ctx->log_prefix);
    fastcgi_close_cnx(&ctx->cnx);
}