#ifndef SFRT_TYPES_H
#define SFRT_TYPES_H

#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <math.h>
#include <printf.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <unistd.h>

#include <sys/stat.h>
#include <sys/uio.h>

#define EXPORT __attribute__((visibility("default")))
#define IMPORT __attribute__((visibility("default")))

#define INLINE __attribute__((always_inline))
#define WEAK   __attribute__((weak))

#ifndef CACHELINE_SIZE
#define CACHELINE_SIZE 32
#endif

#ifndef PAGE_SIZE
#define PAGE_SIZE (1 << 12)
#endif

#define CACHE_ALIGNED __attribute__((aligned(CACHELINE_SIZE)))
#define PAGE_ALIGNED  __attribute__((aligned(PAGE_SIZE)))

/* For this family of macros, do NOT pass zero as the pow2 */
#define round_to_pow2(x, pow2)    (((unsigned long)(x)) & (~((pow2)-1)))
#define round_up_to_pow2(x, pow2) (round_to_pow2(((unsigned long)x) + (pow2)-1, (pow2)))

#define round_to_page(x)    round_to_pow2(x, PAGE_SIZE)
#define round_up_to_page(x) round_up_to_pow2(x, PAGE_SIZE)

// Type alias's so I don't have to write uint32_t a million times
typedef signed char   i8;
typedef unsigned char u8;
typedef int16_t       i16;
typedef uint16_t      u16;
typedef int32_t       i32;
typedef uint32_t      u32;
typedef int64_t       i64;
typedef uint64_t      u64;

// FIXME: per-module configuration?
#define WASM_PAGE_SIZE   (1024 * 64) // 64KB
#define WASM_START_PAGES (1 << 8)    // 16MB
#define WASM_MAX_PAGES   (1 << 15)   // 4GB
#define WASM_STACK_SIZE  (1 << 19)   // 512KB.
#define SBOX_MAX_MEM     (1L << 32)  // 4GB

// These are per module symbols and I'd need to dlsym for each module. instead just use global constants, see above
// macros. The code generator compiles in the starting number of wasm pages, and the maximum number of pages If we try
// and allocate more than max_pages, we should fault
// extern u32 starting_pages;
// extern u32 max_pages;

// The code generator also compiles in stubs that populate the linear memory and function table
void populate_memory(void);
void populate_table(void);

// memory/* also provides the table access functions
// TODO: Change this to use a compiled in size
#define INDIRECT_TABLE_SIZE (1 << 10)

struct indirect_table_entry {
	u32   type_id;
	void *func_pointer;
};

extern __thread struct indirect_table_entry *module_indirect_table;

// for sandbox linear memory isolation
extern __thread void *sandbox_lmbase;
extern __thread u32   sandbox_lmbound;
extern i32            logfd;

// functions in the module to lookup and call per sandbox.
typedef i32 (*mod_main_fn_t)(i32 a, i32 b);
typedef void (*mod_glb_fn_t)(void);
typedef void (*mod_mem_fn_t)(void);
typedef void (*mod_tbl_fn_t)(void);
typedef void (*mod_libc_fn_t)(i32, i32);

typedef enum
{
	MOD_ARG_MODPATH = 0,
	MOD_ARG_MODPORT,
	MOD_ARG_MODNAME,
	MOD_ARG_MODNARGS,
	MOD_ARG_MAX,
} mod_argindex_t;

#define MOD_MAIN_FN "wasmf_main"
#define MOD_GLB_FN  "populate_globals"
#define MOD_MEM_FN  "populate_memory"
#define MOD_TBL_FN  "populate_table"
#define MOD_LIBC_FN "wasmf___init_libc"

#define MOD_MAX_ARGS   16
#define MOD_ARG_MAX_SZ 64
#define MOD_MAX        1024

#define MOD_NAME_MAX 32
#define MOD_PATH_MAX 256

#define JSON_ELE_MAX 16

// FIXME: some naive work-stealing here..
#define SBOX_PULL_MAX 1

#define SBOX_MAX_OPEN      32
#define SBOX_PREOPEN_MAGIC (707707707) // reads lol lol lol upside down

#define SOFTINT_TIMER_START_USEC  (10 * 1000) // start timers 10 ms from now.
#define SOFTINT_TIMER_PERIOD_USEC (1000 * 5)  // 100ms timer..

#ifdef DEBUG
#ifdef NOSTDIO
#define debuglog(fmt, ...) dprintf(logfd, "(%d,%lu) %s: " fmt, sched_getcpu(), pthread_self(), __func__, ##__VA_ARGS__)
#else
#define debuglog(fmt, ...) printf("(%d,%lu) %s: " fmt, sched_getcpu(), pthread_self(), __func__, ##__VA_ARGS__)
#endif
#else
#define debuglog(fmt, ...)
#endif

#define GLB_STDOUT "/dev/null"
#define GLB_STDERR "/dev/null"
#define GLB_STDIN  "/dev/zero"

#define LOGFILE "awesome.log"

#define RDWR_VEC_MAX 16

#define MOD_REQ_CORE  0                                  // Dedicated Listener Core
#define SBOX_NCORES   (NCORES > 1 ? NCORES - 1 : NCORES) // If multicore, use all but the dedicated listener core
#define SBOX_MAX_REQS (1 << 19)                          // random!

#define SBOX_RESP_STRSZ 32

#define MOD_BACKLOG          1000
#define EPOLL_MAX            1024
#define MOD_REQ_RESP_DEFAULT (PAGE_SIZE)
#define QUIESCENSE_TIME      (1 << 20) // cycles!

#define HTTP_HEADERS_MAX     16
#define HTTP_HEADER_MAXSZ    32
#define HTTP_HEADERVAL_MAXSZ 64

#define HTTP_RESP_200OK          "HTTP/1.1 200 OK\r\n"
#define HTTP_RESP_CONTTYPE       "Content-type:                                 \r\n"
#define HTTP_RESP_CONTLEN        "Content-length:             \r\n\r\n" // content body follows this
#define HTTP_RESP_CONTTYPE_PLAIN "text/plain"

#endif /* SFRT_TYPES_H */