/*
 * This file is part of the MicroPython project, http://micropython.org/
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2013-2016 Damien P. George
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>

#include "py/compile.h"
#include "py/persistentcode.h"
#include "py/runtime.h"
#include "py/gc.h"
#include "py/stackctrl.h"
#include "genhdr/mpversion.h"
#ifdef _WIN32
#include "ports/windows/fmode.h"
#endif

// Command line options, with their defaults
STATIC uint emit_opt = MP_EMIT_OPT_NONE;
mp_uint_t mp_verbose_flag = 0;

// Heap size of GC heap (if enabled)
// Make it larger on a 64 bit machine, because pointers are larger.
long heap_size = 1024 * 1024 * (sizeof(mp_uint_t) / 4);

STATIC void stderr_print_strn(void *env, const char *str, size_t len) {
 (void)env;
 ssize_t dummy = write(STDERR_FILENO, str, len);
 (void)dummy;
}

STATIC const mp_print_t mp_stderr_print = {NULL, stderr_print_strn};

STATIC int compile_and_save(const char *file, const char *output_file, const char *source_file) {
 nlr_buf_t nlr;
 if (nlr_push(&nlr) == 0) {
 mp_lexer_t *lex = mp_lexer_new_from_file(file);

 qstr source_name;
 if (source_file == NULL) {
 source_name = lex->source_name;
 } else {
 source_name = qstr_from_str(source_file);
 }

 #if MICROPY_PY___FILE__
 mp_store_global(MP_QSTR___file__, MP_OBJ_NEW_QSTR(source_name));
 #endif

 mp_parse_tree_t parse_tree = mp_parse(lex, MP_PARSE_FILE_INPUT);
 mp_raw_code_t *rc = mp_compile_to_raw_code(&parse_tree, source_name, false);

 vstr_t vstr;
 vstr_init(&vstr, 16);
 if (output_file == NULL) {
 vstr_add_str(&vstr, file);
 vstr_cut_tail_bytes(&vstr, 2);
 vstr_add_str(&vstr, "mpy");
 } else {
 vstr_add_str(&vstr, output_file);
 }
 mp_raw_code_save_file(rc, vstr_null_terminated_str(&vstr));
 vstr_clear(&vstr);

 nlr_pop();
 return 0;
 } else {
 // uncaught exception
 mp_obj_print_exception(&mp_stderr_print, (mp_obj_t)nlr.ret_val);
 return 1;
 }
}

STATIC int usage(char **argv) {
 printf(
 "usage: %s [<opts>] [-X <implopt>] <input filename>\n"
 "Options:\n"
 "--version : show version information\n"
 "-o : output file for compiled bytecode (defaults to input with .mpy extension)\n"
 "-s : source filename to embed in the compiled bytecode (defaults to input file)\n"
 "-v : verbose (trace various operations); can be multiple\n"
 "-O[N] : apply bytecode optimizations of level N\n"
 "\n"
 "Target specific options:\n"
 "-msmall-int-bits=number : set the maximum bits used to encode a small-int\n"
 "-mno-unicode : don't support unicode in compiled strings\n"
 "-mcache-lookup-bc : cache map lookups in the bytecode\n"
 "-march=<arch> : set architecture for native emitter; x86, x64, armv6, armv7m, armv7em, armv7emsp, armv7emdp, xtensa, xtensawin\n"
 "\n"
 "Implementation specific options:\n", argv[0]
 );
 int impl_opts_cnt = 0;
 printf(
 #if MICROPY_EMIT_NATIVE
 " emit={bytecode,native,viper} -- set the default code emitter\n"
 #else
 " emit=bytecode -- set the default code emitter\n"
 #endif
 );
 impl_opts_cnt++;
 printf(
 " heapsize=<n> -- set the heap size for the GC (default %ld)\n"
 , heap_size);
 impl_opts_cnt++;

 if (impl_opts_cnt == 0) {
 printf(" (none)\n");
 }

 return 1;
}

// Process options which set interpreter init options
STATIC void pre_process_options(int argc, char **argv) {
 for (int a = 1; a < argc; a++) {
 if (argv[a][0] == '-') {
 if (strcmp(argv[a], "-X") == 0) {
 if (a + 1 >= argc) {
 exit(usage(argv));
 }
 if (strcmp(argv[a + 1], "emit=bytecode") == 0) {
 emit_opt = MP_EMIT_OPT_BYTECODE;
 #if MICROPY_EMIT_NATIVE
 } else if (strcmp(argv[a + 1], "emit=native") == 0) {
 emit_opt = MP_EMIT_OPT_NATIVE_PYTHON;
 } else if (strcmp(argv[a + 1], "emit=viper") == 0) {
 emit_opt = MP_EMIT_OPT_VIPER;
 #endif
 } else if (strncmp(argv[a + 1], "heapsize=", sizeof("heapsize=") - 1) == 0) {
 char *end;
 heap_size = strtol(argv[a + 1] + sizeof("heapsize=") - 1, &end, 0);
 // Don't bring unneeded libc dependencies like tolower()
 // If there's 'w' immediately after number, adjust it for
 // target word size. Note that it should be *before* size
 // suffix like K or M, to avoid confusion with kilowords,
 // etc. the size is still in bytes, just can be adjusted
 // for word size (taking 32bit as baseline).
 bool word_adjust = false;
 if ((*end | 0x20) == 'w') {
 word_adjust = true;
 end++;
 }
 if ((*end | 0x20) == 'k') {
 heap_size *= 1024;
 } else if ((*end | 0x20) == 'm') {
 heap_size *= 1024 * 1024;
 }
 if (word_adjust) {
 heap_size = heap_size * BYTES_PER_WORD / 4;
 }
 } else {
 exit(usage(argv));
 }
 a++;
 }
 }
 }
}

MP_NOINLINE int main_(int argc, char **argv) {
 mp_stack_set_limit(40000 * (BYTES_PER_WORD / 4));

 pre_process_options(argc, argv);

 char *heap = malloc(heap_size);
 gc_init(heap, heap + heap_size);

 mp_init();
 #ifdef _WIN32
 set_fmode_binary();
 #endif
 mp_obj_list_init(mp_sys_path, 0);
 mp_obj_list_init(mp_sys_argv, 0);

 #if MICROPY_EMIT_NATIVE
 // Set default emitter options
 MP_STATE_VM(default_emit_opt) = emit_opt;
 #else
 (void)emit_opt;
 #endif

 // set default compiler configuration
 mp_dynamic_compiler.small_int_bits = 31;
 mp_dynamic_compiler.opt_cache_map_lookup_in_bytecode = 0;
 mp_dynamic_compiler.py_builtins_str_unicode = 1;
 #if defined(__i386__)
 mp_dynamic_compiler.native_arch = MP_NATIVE_ARCH_X86;
 mp_dynamic_compiler.nlr_buf_num_regs = MICROPY_NLR_NUM_REGS_X86;
 #elif defined(__x86_64__)
 mp_dynamic_compiler.native_arch = MP_NATIVE_ARCH_X64;
 mp_dynamic_compiler.nlr_buf_num_regs = MAX(MICROPY_NLR_NUM_REGS_X64, MICROPY_NLR_NUM_REGS_X64_WIN);
 #elif defined(__arm__) && !defined(__thumb2__)
 mp_dynamic_compiler.native_arch = MP_NATIVE_ARCH_ARMV6;
 mp_dynamic_compiler.nlr_buf_num_regs = MICROPY_NLR_NUM_REGS_ARM_THUMB_FP;
 #else
 mp_dynamic_compiler.native_arch = MP_NATIVE_ARCH_NONE;
 mp_dynamic_compiler.nlr_buf_num_regs = 0;
 #endif

 const char *input_file = NULL;
 const char *output_file = NULL;
 const char *source_file = NULL;

 // parse main options
 for (int a = 1; a < argc; a++) {
 if (argv[a][0] == '-') {
 if (strcmp(argv[a], "-X") == 0) {
 a += 1;
 } else if (strcmp(argv[a], "--version") == 0) {
 printf("MicroPython " MICROPY_GIT_TAG " on " MICROPY_BUILD_DATE
 "; mpy-cross emitting mpy v" MP_STRINGIFY(MPY_VERSION) "\n");
 return 0;
 } else if (strcmp(argv[a], "-v") == 0) {
 mp_verbose_flag++;
 } else if (strncmp(argv[a], "-O", 2) == 0) {
 if (unichar_isdigit(argv[a][2])) {
 MP_STATE_VM(mp_optimise_value) = argv[a][2] & 0xf;
 } else {
 MP_STATE_VM(mp_optimise_value) = 0;
 for (char *p = argv[a] + 1; *p && *p == 'O'; p++, MP_STATE_VM(mp_optimise_value)++) {;
 }
 }
 } else if (strcmp(argv[a], "-o") == 0) {
 if (a + 1 >= argc) {
 exit(usage(argv));
 }
 a += 1;
 output_file = argv[a];
 } else if (strcmp(argv[a], "-s") == 0) {
 if (a + 1 >= argc) {
 exit(usage(argv));
 }
 a += 1;
 source_file = argv[a];
 } else if (strncmp(argv[a], "-msmall-int-bits=", sizeof("-msmall-int-bits=") - 1) == 0) {
 char *end;
 mp_dynamic_compiler.small_int_bits =
 strtol(argv[a] + sizeof("-msmall-int-bits=") - 1, &end, 0);
 if (*end) {
 return usage(argv);
 }
 // TODO check that small_int_bits is within range of host's capabilities
 } else if (strcmp(argv[a], "-mno-cache-lookup-bc") == 0) {
 mp_dynamic_compiler.opt_cache_map_lookup_in_bytecode = 0;
 } else if (strcmp(argv[a], "-mcache-lookup-bc") == 0) {
 mp_dynamic_compiler.opt_cache_map_lookup_in_bytecode = 1;
 } else if (strcmp(argv[a], "-mno-unicode") == 0) {
 mp_dynamic_compiler.py_builtins_str_unicode = 0;
 } else if (strcmp(argv[a], "-municode") == 0) {
 mp_dynamic_compiler.py_builtins_str_unicode = 1;
 } else if (strncmp(argv[a], "-march=", sizeof("-march=") - 1) == 0) {
 const char *arch = argv[a] + sizeof("-march=") - 1;
 if (strcmp(arch, "x86") == 0) {
 mp_dynamic_compiler.native_arch = MP_NATIVE_ARCH_X86;
 mp_dynamic_compiler.nlr_buf_num_regs = MICROPY_NLR_NUM_REGS_X86;
 } else if (strcmp(arch, "x64") == 0) {
 mp_dynamic_compiler.native_arch = MP_NATIVE_ARCH_X64;
 mp_dynamic_compiler.nlr_buf_num_regs = MAX(MICROPY_NLR_NUM_REGS_X64, MICROPY_NLR_NUM_REGS_X64_WIN);
 } else if (strcmp(arch, "armv6") == 0) {
 mp_dynamic_compiler.native_arch = MP_NATIVE_ARCH_ARMV6;
 mp_dynamic_compiler.nlr_buf_num_regs = MICROPY_NLR_NUM_REGS_ARM_THUMB_FP;
 } else if (strcmp(arch, "armv7m") == 0) {
 mp_dynamic_compiler.native_arch = MP_NATIVE_ARCH_ARMV7M;
 mp_dynamic_compiler.nlr_buf_num_regs = MICROPY_NLR_NUM_REGS_ARM_THUMB_FP;
 } else if (strcmp(arch, "armv7em") == 0) {
 mp_dynamic_compiler.native_arch = MP_NATIVE_ARCH_ARMV7EM;
 mp_dynamic_compiler.nlr_buf_num_regs = MICROPY_NLR_NUM_REGS_ARM_THUMB_FP;
 } else if (strcmp(arch, "armv7emsp") == 0) {
 mp_dynamic_compiler.native_arch = MP_NATIVE_ARCH_ARMV7EMSP;
 mp_dynamic_compiler.nlr_buf_num_regs = MICROPY_NLR_NUM_REGS_ARM_THUMB_FP;
 } else if (strcmp(arch, "armv7emdp") == 0) {
 mp_dynamic_compiler.native_arch = MP_NATIVE_ARCH_ARMV7EMDP;
 mp_dynamic_compiler.nlr_buf_num_regs = MICROPY_NLR_NUM_REGS_ARM_THUMB_FP;
 } else if (strcmp(arch, "xtensa") == 0) {
 mp_dynamic_compiler.native_arch = MP_NATIVE_ARCH_XTENSA;
 mp_dynamic_compiler.nlr_buf_num_regs = MICROPY_NLR_NUM_REGS_XTENSA;
 } else if (strcmp(arch, "xtensawin") == 0) {
 mp_dynamic_compiler.native_arch = MP_NATIVE_ARCH_XTENSAWIN;
 mp_dynamic_compiler.nlr_buf_num_regs = MICROPY_NLR_NUM_REGS_XTENSAWIN;
 } else {
 return usage(argv);
 }
 } else {
 return usage(argv);
 }
 } else {
 if (input_file != NULL) {
 mp_printf(&mp_stderr_print, "multiple input files\n");
 exit(1);
 }
 input_file = argv[a];
 }
 }

 if (input_file == NULL) {
 mp_printf(&mp_stderr_print, "no input file\n");
 exit(1);
 }

 int ret = compile_and_save(input_file, output_file, source_file);

 #if MICROPY_PY_MICROPYTHON_MEM_INFO
 if (mp_verbose_flag) {
 mp_micropython_mem_info(0, NULL);
 }
 #endif

 mp_deinit();

 return ret & 0xff;
}

int main(int argc, char **argv) {
 mp_stack_ctrl_init();
 return main_(argc, argv);
}

uint mp_import_stat(const char *path) {
 (void)path;
 return MP_IMPORT_STAT_NO_EXIST;
}

void nlr_jump_fail(void *val) {
 fprintf(stderr, "FATAL: uncaught NLR %p\n", val);
 exit(1);
}