//===----------------------------------------------------------------------===//
//
//                         BusTub
//
// schema.cpp
//
// Identification: src/catalog/schema.cpp
//
// Copyright (c) 2015-2025, Carnegie Mellon University Database Group
//
//===----------------------------------------------------------------------===//

#include "catalog/schema.h"

#include <sstream>
#include <string>
#include <vector>

namespace bustub {

/**
 * Constructs the schema corresponding to the vector of columns, read left-to-right.
 * @param columns columns that describe the schema's individual columns
 */
Schema::Schema(const std::vector<Column> &columns) {
  uint32_t curr_offset = 0;
  for (uint32_t index = 0; index < columns.size(); index++) {
    Column column = columns[index];
    // handle uninlined column
    if (!column.IsInlined()) {
      tuple_is_inlined_ = false;
      uninlined_columns_.push_back(index);
    }
    // set column offset
    column.column_offset_ = curr_offset;
    if (column.IsInlined()) {
      curr_offset += column.GetStorageSize();
    } else {
      curr_offset += sizeof(uint32_t);
    }

    // add column
    this->columns_.push_back(column);
  }
  // set tuple length
  length_ = curr_offset;
}

/** @return string representation of this schema */
auto Schema::ToString(bool simplified) const -> std::string {
  if (simplified) {
    std::ostringstream os;
    bool first = true;
    os << "(";
    for (uint32_t i = 0; i < GetColumnCount(); i++) {
      if (first) {
        first = false;
      } else {
        os << ", ";
      }
      os << columns_[i].ToString(simplified);
    }
    os << ")";
    return (os.str());
  }

  std::ostringstream os;

  os << "Schema["
     << "NumColumns:" << GetColumnCount() << ", "
     << "IsInlined:" << tuple_is_inlined_ << ", "
     << "Length:" << length_ << "]";

  bool first = true;
  os << " :: (";
  for (uint32_t i = 0; i < GetColumnCount(); i++) {
    if (first) {
      first = false;
    } else {
      os << ", ";
    }
    os << columns_[i].ToString();
  }
  os << ")";

  return os.str();
}

}  // namespace bustub