/*
 * This file is part of the MicroPython project, http://micropython.org/
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2017 Armink (armink.ztl@gmail.com)
 *
 * 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 <stdint.h>
#include <stdio.h>
#include <string.h>

#include <rtthread.h>
#include <shell.h>

#include "py/compile.h"
#include "py/runtime.h"
#include "py/repl.h"
#include "py/gc.h"
#include "py/mperrno.h"
#include "py/stackctrl.h"
#include "lib/utils/pyexec.h"
#include "rtt_getchar.h"

#if MICROPY_ENABLE_COMPILER
void do_str(const char *src, mp_parse_input_kind_t input_kind) {
    nlr_buf_t nlr;
    if (nlr_push(&nlr) == 0) {
        mp_lexer_t *lex = mp_lexer_new_from_str_len(MP_QSTR__lt_stdin_gt_, src, strlen(src), 0);
        qstr source_name = lex->source_name;
        mp_parse_tree_t parse_tree = mp_parse(lex, input_kind);
        mp_obj_t module_fun = mp_compile(&parse_tree, source_name, MP_EMIT_OPT_NONE, true);
        mp_call_function_0(module_fun);
        nlr_pop();
    } else {
        // uncaught exception
        mp_obj_print_exception(&mp_plat_print, (mp_obj_t)nlr.ret_val);
    }
}
#endif

static char *stack_top;
static char heap[MICROPY_HEAP_SIZE];

void mpy_main(const char *filename) {
    int stack_dummy;
    stack_top = (char*)&stack_dummy;

    rt_kprintf("\n");

    rtt_getchar_init();

    mp_stack_set_top(stack_top);
    // Make MicroPython's stack limit somewhat smaller than full stack available
    mp_stack_set_limit(FINSH_THREAD_STACK_SIZE - 512);

    #if MICROPY_ENABLE_GC
    gc_init(heap, heap + sizeof(heap));
    #endif

    mp_init();

    if (filename) {
        pyexec_file(filename);
    } else {
        #if MICROPY_ENABLE_COMPILER
        #if MICROPY_REPL_EVENT_DRIVEN
        pyexec_event_repl_init();
        for (;;) {
            int c = mp_hal_stdin_rx_chr();
            if (pyexec_event_repl_process_char(c)) {
                break;
            }
        }
        #else
        pyexec_friendly_repl();
        #endif
//      do_str("print('hello world!', list(x+1 for x in range(10)), end='eol\\n')", MP_PARSE_SINGLE_INPUT);
//      do_str("for i in range(10):\r\n  print(i)", MP_PARSE_FILE_INPUT);
        #else
        pyexec_frozen_module("frozentest.py");
        #endif
    }
    mp_deinit();

    rtt_getchar_deinit();
}

void gc_collect(void) {
    // WARNING: This gc_collect implementation doesn't try to get root
    // pointers from CPU registers, and thus may function incorrectly.
    void *dummy;
    gc_collect_start();
    gc_collect_root(&dummy, ((mp_uint_t)stack_top - (mp_uint_t)&dummy) / sizeof(mp_uint_t));
    gc_collect_end();
    gc_dump_info();
}

mp_lexer_t *mp_lexer_new_from_file(const char *filename) {
    mp_raise_OSError(ENOENT);
}

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

mp_obj_t mp_builtin_open(size_t n_args, const mp_obj_t *args, mp_map_t *kwargs) {
    return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_KW(mp_builtin_open_obj, 1, mp_builtin_open);

NORETURN void nlr_jump_fail(void *val) {
    while (1);
}

#ifndef NDEBUG
void MP_WEAK __assert_func(const char *file, int line, const char *func, const char *expr) {
    printf("Assertion '%s' failed, at file %s:%d\n", expr, file, line);
    __fatal_error("Assertion failed");
}
#endif

#if defined(RT_USING_FINSH) && defined(FINSH_USING_MSH)
#include <finsh.h>
static void python(uint8_t argc, char **argv) {
    if (argc > 1) {
        mpy_main(argv[1]);
    } else {
        mpy_main(NULL);
    }
}
MSH_CMD_EXPORT(python, MicroPython: `python [file.py]` execute python script);
#endif /* defined(RT_USING_FINSH) && defined(FINSH_USING_MSH) */