#include "pmake.h"

duk_context* js_ctx;

LOAD(js_core);
LOAD(js_cmdline);

static duk_ret_t js_console_log(duk_context* self) {
	printf("%s\n", duk_to_string(self, 0));

	return 0;
}

static void js_argv_init(int argc, char** argv) {
	int arr;
	int i;

	duk_push_global_object(js_ctx);
	arr = duk_push_array(js_ctx);

	for(i = 0; i < argc; i++) {
		duk_push_string(js_ctx, argv[i]);
		duk_put_prop_index(js_ctx, arr, i);
	}

	duk_put_prop_string(js_ctx, 0, "ARGV");

	duk_pop(js_ctx);
}

static void js_console_init(void) {
	int obj;

	duk_push_global_object(js_ctx);
	obj = duk_push_object(js_ctx);

	duk_push_c_function(js_ctx, js_console_log, 1);
	duk_put_prop_string(js_ctx, obj, "log");

	duk_put_prop_string(js_ctx, 0, "console");

	duk_pop(js_ctx);
}

static duk_ret_t js_process_exit(duk_context* self) {
	duk_idx_t argc = duk_get_top(self);
	int	  ex;

	if(argc > 1) {
		return duk_error(self, DUK_ERR_TYPE_ERROR, "needs 0 or 1 argument(s)");
	}

	if(argc == 1) {
		ex = duk_to_number(self, 0);
	} else {
		ex = 0;
	}

	exit(ex);
}

static void js_process_init(void) {
	int obj;

	duk_push_global_object(js_ctx);
	obj = duk_push_object(js_ctx);

	duk_push_c_function(js_ctx, js_process_exit, DUK_VARARGS);
	duk_put_prop_string(js_ctx, obj, "exit");

	duk_put_prop_string(js_ctx, 0, "process");

	duk_pop(js_ctx);
}

int js_init(int argc, char** argv) {
	js_ctx = duk_create_heap_default();

	js_argv_init(argc, argv);
	js_console_init();
	js_process_init();

	if(duk_peval_lstring(js_ctx, js_core, js_core_len) != 0) {
		printf("error: js/core.js: %s\n", duk_safe_to_string(js_ctx, -1));
		return 1;
	}

#define X(name, prefix) \
	if(duk_peval_lstring(js_ctx, prefix##_##name, prefix##_##name##_len) != 0) { \
		printf("error: %s: %s\n", #prefix "/" #name ".js", duk_safe_to_string(js_ctx, -1)); \
		return 1; \
	}
	JS;
#undef X

	if(duk_peval_lstring(js_ctx, js_cmdline, js_cmdline_len) != 0) {
		printf("error: js/cmdline.js: %s\n", duk_safe_to_string(js_ctx, -1));
		return 1;
	}

	return 0;
}

void js_uninit(void) {
	duk_destroy_heap(js_ctx);
}