#include "global_scope.hpp"
#include "ast.hpp"

void global_definition::compile() {
    env_ptr new_env = env_ptr(new env_offset(0, nullptr));
    for(auto it = params.rbegin(); it != params.rend(); it++) {
        new_env = env_ptr(new env_var(*it, new_env));
    }
    body->compile(new_env, instructions);
    instructions.push_back(instruction_ptr(new instruction_update(params.size())));
    instructions.push_back(instruction_ptr(new instruction_pop(params.size())));
}

void global_definition::declare_llvm(llvm_context& ctx) {
    generated_function = ctx.create_custom_function(name, params.size());
}

void global_definition::generate_llvm(llvm_context& ctx) {
    ctx.builder.SetInsertPoint(&generated_function->getEntryBlock());
    for(auto& instruction : instructions) {
        instruction->gen_llvm(ctx, generated_function);
    }
    ctx.builder.CreateRetVoid();
}

global_definition_ptr& global_scope::add_definition(std::string n, std::vector<std::string> ps, ast_ptr b) {
    auto occurence_it = occurence_count.find(n);
    int occurence = 0;
    if(occurence_it != occurence_count.end()) {
        occurence = occurence_it->second + 1;
    }
    occurence_count[n] = occurence;

    std::string final_name = n;
    if (occurence != 0) {
        final_name += "_";
        final_name += std::to_string(occurence);
    }

    definitions.push_back(global_definition_ptr(
        new global_definition(final_name, std::move(ps), std::move(b))));
    return *definitions.rbegin();
}