#include "codegen.h"

#include <mie/ir/block.h>
#include <mie/ir/func.h>
#include <mie/ir/module.h>

struct match_codegen_state {
	struct code_generator_state s_base;
};

static struct code_generator_result gen_expr(
	struct ivy_codegen *gen, struct code_generator_state *state,
	struct ivy_ast_node *node, size_t depth)
{
	struct match_codegen_state *match = (struct match_codegen_state *)state;

	codegen_push_generator(gen, CODE_GENERATOR_EXPR, 0, NULL);
	return CODEGEN_RESULT_OK(CODEGEN_R_REPEAT_NODE);
}

static struct code_generator_result gen_match(
	struct ivy_codegen *gen, struct code_generator_state *state,
	struct ivy_ast_node *node, size_t depth)
{
	return CODEGEN_RESULT_OK(0);
}

static struct code_generator_result gen_block(
	struct ivy_codegen *gen, struct code_generator_state *state,
	struct ivy_ast_node *node, size_t depth)
{
	struct match_codegen_state *match = (struct match_codegen_state *)state;
	struct mie_func *func = mie_builder_get_current_func(gen->c_builder);

	codegen_push_generator(gen, CODE_GENERATOR_BLOCK, 0, NULL);
	return CODEGEN_RESULT_OK(0);
}

static struct code_generator_result gen_discard(
	struct ivy_codegen *gen, struct code_generator_state *state,
	struct ivy_ast_node *node, size_t depth)
{
	struct match_codegen_state *match = (struct match_codegen_state *)state;
	return CODEGEN_RESULT_OK(0);
}

static enum ivy_status state_init(
	struct ivy_codegen *gen, struct code_generator_state *state,
	uintptr_t argv, void *argp)
{
	struct match_codegen_state *match = (struct match_codegen_state *)state;

	return IVY_OK;
}

static enum ivy_status state_fini(
	struct ivy_codegen *gen, struct code_generator_state *state,
	struct code_generator_value *result)
{
	struct match_codegen_state *match = (struct match_codegen_state *)state;
	return IVY_OK;
}

static struct code_generator_result value_received(
	struct ivy_codegen *gen, struct code_generator_state *state,
	struct code_generator_value *value)
{
	struct match_codegen_state *match = (struct match_codegen_state *)state;
	struct mie_func *func = mie_builder_get_current_func(gen->c_builder);

	return CODEGEN_RESULT_OK(0);
}

struct code_generator match_generator = {
	.g_type = CODE_GENERATOR_FOR_LOOP,
	.g_state_size = sizeof(struct match_codegen_state),
	.g_state_init = state_init,
	.g_state_fini = state_fini,
	.g_value_received = value_received,
	.g_expr_generator = gen_expr,
	.g_node_generators = {
		NODE_CODEGEN(MATCH, gen_match),
		NODE_CODEGEN(BLOCK, gen_block),
		NODE_CODEGEN(DISCARD, gen_discard),
	},
};