#include "config.h"
#include "global.h"
#include "UserDefinedRule.h"
#include "InfoPackageScanned.h"
#include "helpers.h"

void populate_a_rule(
 UserDefinedRule& rule,
 const vector<string>& target_vector,
 const vector<string>& prerequisite_vector,
 vector<string> commands
)
{
 // todo:在此处进行变量展开,展开之后再看是否绝对路径
 // todo: 如果是绝对路径,就不要跟当前目录拼接了。
 // 应该支持这样的变量:$(SHADOWDIR)
 // 将其替换为shadow(rule.dir)的结果

 for (auto t : target_vector) {
 expand_variable(t, rule.dir);
 fs::path path{ t };
 if (path.is_absolute()) {
 rule.targets.push_back(path);
 }
 else {
 fs::path a = rule.dir;
 a /= t;
 rule.targets.push_back(a);
 }

 }

 for (auto p : prerequisite_vector) {
 //fs::path a = rule.dir;
 //a /= p;
 //rule.prerequisites.push_back(a);

 expand_variable(p, rule.dir);
 fs::path path{ p };
 if (path.is_absolute()) {
 rule.prerequisites.push_back(path);
 }
 else {
 fs::path a = rule.dir;
 a /= p;
 rule.prerequisites.push_back(a);
 }


 }

 //{
 // rule.commands.push_back(recipe);
 //}

 for (auto& c : commands) {
 expand_variable(c, rule.dir);
 }
 rule.commands = commands;

}

// 各部分的命名可参考 https://www.gnu.org/software/make/manual/make.html#Rule-Introduction
void process_user_defined_rule(fs::path src_path, string rule_string, InfoPackageScanned& pack)
{
 //cout << rule_string << endl;
 // 形如 ui.cpp ui.h : ui.fl // fluid -c ui.fl
 // ui.cpp ui.h : ui.fl 叫dependency relationship。冒号前的叫targets,冒号后的叫prerequisites
 // fluid -c ui.fl 叫recipe,可由多个command组成

 // 分离dependency relationship与recipe部分
 auto slash_slash_pos = rule_string.find("//");
 string dependency_relationship = rule_string.substr(0, slash_slash_pos);
 boost::algorithm::trim(dependency_relationship);
 string recipe = rule_string.substr(slash_slash_pos + 2);
 boost::algorithm::trim(recipe);
 //cout << dependency_relationship << endl;
 //cout << recipe << endl;

 // 分离dependency relationship中的targets与prerequisites
 auto colon_pos = dependency_relationship.find(":");
 string targets = dependency_relationship.substr(0, colon_pos);
 boost::algorithm::trim(targets);
 string prerequisites = dependency_relationship.substr(colon_pos + 1);
 boost::algorithm::trim(prerequisites);
 //cout << targets << endl;
 //cout << prerequisites << endl;

 // 分离dependency relationship中的各个target
 vector<string> target_vector;
 std::string target_delimiters(" "); // 支持多个分界符
 boost::split(target_vector, targets, boost::is_any_of(target_delimiters), boost::token_compress_on); // token_compress_on是为了将单词之间的多个空格视为一个
 //for (auto t : target_vector) {
 // cout << ">>>" << t << "<<<" << endl;
 //}

 // 分离prerequisites中的各个prerequisite
 vector<string> prerequisite_vector;
 std::string prerequisite_delimiters(" "); // 支持多个分界符
 boost::split(prerequisite_vector, prerequisites, boost::is_any_of(prerequisite_delimiters), boost::token_compress_on); // token_compress_on是为了将单词之间的多个空格视为一个
 //for (auto p : prerequisite_vector) {
 // cout << ">>>" << p << "<<<" << endl;
 //}

 UserDefinedRule rule;
 rule.dir = src_path;
 rule.dir.remove_filename();


 populate_a_rule(rule, target_vector, prerequisite_vector, { recipe });


 pack.user_defined_rules.push_back(rule);

}

void process_user_defined_rule_multi_lines(fs::path src_path, string dependency_relationship,
 vector<string> commands, InfoPackageScanned& pack)
{
 // 分离dependency relationship中的targets与prerequisites
 auto colon_pos = dependency_relationship.find(":");
 string targets = dependency_relationship.substr(0, colon_pos);
 boost::algorithm::trim(targets);
 string prerequisites = dependency_relationship.substr(colon_pos + 1);
 boost::algorithm::trim(prerequisites);
 //cout << targets << endl;
 //cout << prerequisites << endl;

 // 分离dependency relationship中的各个target
 vector<string> target_vector;
 std::string target_delimiters(" "); // 支持多个分界符
 boost::split(target_vector, targets, boost::is_any_of(target_delimiters), boost::token_compress_on); // token_compress_on是为了将单词之间的多个空格视为一个
 //for (auto t : target_vector) {
 // cout << ">>>" << t << "<<<" << endl;
 //}

 // 分离prerequisites中的各个prerequisite
 vector<string> prerequisite_vector;
 std::string prerequisite_delimiters(" "); // 支持多个分界符
 boost::split(prerequisite_vector, prerequisites, boost::is_any_of(prerequisite_delimiters), boost::token_compress_on); // token_compress_on是为了将单词之间的多个空格视为一个
 //for (auto p : prerequisite_vector) {
 // cout << ">>>" << p << "<<<" << endl;
 //}

 UserDefinedRule rule;
 rule.dir = src_path;
 rule.dir.remove_filename();

 //for (auto t : target_vector) {
 // fs::path a = rule.dir;
 // a /= t;
 // rule.targets.push_back(a);
 //}

 //for (auto p : prerequisite_vector) {
 // fs::path a = rule.dir;
 // a /= p;
 // rule.prerequisites.push_back(a);
 //}

 //
 //rule.commands = commands;

 populate_a_rule(rule, target_vector, prerequisite_vector, commands);

 pack.user_defined_rules.push_back(rule);

}