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

#include "include/ast.h"
#include "include/exec.h"
#include "include/util.h"

extern AST* root;

ASTNumData exec_expr(AST* ast) {
    // ast_print(ast);
    log_dbg("Started execution.");
    switch (ast->type) {
        case AST_TYPE_CALL: return exec_call(ast);
        case AST_TYPE_NUM:  return *(ASTNumData*)ast->data;
        default:            printf("what\n");
    }
}

ASTNumData exec_call(AST* ast) {
    log_dbg("Started call execution.");
    fflush(stdout);
    ASTCallData* calldata = (ASTCallData*)ast->data;
    if (!strcmp(calldata->to, "+") && calldata->argc == 2) {

        ASTNumData n1 = exec_expr(calldata->argv[0]);
        ASTNumData n2 = exec_expr(calldata->argv[1]);

        return n1 + n2;
    } else if (!strcmp(calldata->to, "-") && calldata->argc == 2) {
        ASTNumData n1 = exec_expr(calldata->argv[0]);
        ASTNumData n2 = exec_expr(calldata->argv[1]);

        return n1 - n2;
    } else if (!strcmp(calldata->to, "*") && calldata->argc == 2) {
        ASTNumData n1 = exec_expr(calldata->argv[0]);
        ASTNumData n2 = exec_expr(calldata->argv[1]);

        return n1 * n2;
    } else if (!strcmp(calldata->to, "/") && calldata->argc == 2) {
        ASTNumData n1 = exec_expr(calldata->argv[0]);
        ASTNumData n2 = exec_expr(calldata->argv[1]);

        return n1 / n2;
    }
    return -1000;
}

void exec_print(double n) { printf("= %lf\n", n); }