// file      : libbrep/build.hxx -*- C++ -*-
// copyright : Copyright (c) 2014-2017 Code Synthesis Ltd
// license   : MIT; see accompanying LICENSE file

#ifndef LIBBREP_BUILD_HXX
#define LIBBREP_BUILD_HXX

#include <chrono>

#include <odb/core.hxx>
#include <odb/section.hxx>

#include <libbbot/manifest.hxx>

#include <libbrep/types.hxx>
#include <libbrep/utility.hxx>

#include <libbrep/common.hxx> // Must be included last (see assert).

// Used by the data migration entries.
//
#define LIBBREP_BUILD_SCHEMA_VERSION_BASE 1

#pragma db model version(LIBBREP_BUILD_SCHEMA_VERSION_BASE, 1, open)

// We have to keep these mappings at the global scope instead of inside
// the brep namespace because they need to be also effective in the
// bbot namespace from which we "borrow" types (and some of them use the mapped
// types).
//
#pragma db map type(bbot::result_status) as(std::string) \
  to(to_string (?))                                      \
  from(bbot::to_result_status (?))

namespace brep
{
  #pragma db value
  struct build_id
  {
    package_id package;
    string configuration;
    canonical_version toolchain_version;

    build_id () = default;
    build_id (package_id p, string c, const brep::version& v)
        : package (move (p)),
          configuration (move (c)),
          toolchain_version {
            v.epoch, v.canonical_upstream, v.canonical_release, v.revision} {}
  };

  inline bool
  operator< (const build_id& x, const build_id& y)
  {
    return
      x.package < y.package ? true :
      y.package < x.package ? false :
      x.configuration < y.configuration;
  }

  // build_state
  //
  enum class build_state: std::uint8_t
  {
    untested,
    testing,
    tested
  };

  string
  to_string (build_state);

  build_state
  to_build_state (const string&); // May throw invalid_argument.

  inline ostream&
  operator<< (ostream& os, build_state s) {return os << to_string (s);}

  #pragma db map type(build_state) as(string) \
    to(to_string (?))                         \
    from(brep::to_build_state (?))

  // result_status
  //
  using bbot::result_status;

  using optional_result_status = optional<result_status>;

  #pragma db map type(optional_result_status) as(optional_string) \
    to((?) ? bbot::to_string (*(?)) : brep::optional_string ())   \
    from((?)                                                      \
         ? bbot::to_result_status (*(?))                          \
         : brep::optional_result_status ())

  // operation_results
  //
  using bbot::operation_result;
  #pragma db value(operation_result) definition

  using bbot::operation_results;

  #pragma db object pointer(shared_ptr) session
  class build
  {
  public:
    using timestamp_type = brep::timestamp;

    // Create the build object with the testing state, non-existent status,
    // the timestamp set to now and the forced flag set to false.
    //
    build (string package_name, version package_version,
           string configuration,
           string toolchain_name, version toolchain_version,
           string machine, string machine_summary);

    build_id id;

    string& package_name;               // Tracks id.package.name.
    upstream_version package_version;   // Original of id.package.version.
    string& configuration;              // Tracks id.configuration.
    string toolchain_name;
    upstream_version toolchain_version; // Original of id.toolchain_version.

    build_state state;

    // Time of the last state change (the creation time initially).
    //
    timestamp_type timestamp;

    // True if the package rebuild has been forced.
    //
    bool forced;

    // Present only if the state is 'tested'.
    //
    optional<result_status> status;

    // Present only if the state is 'testing' or 'tested'.
    //
    optional<string> machine;
    optional<string> machine_summary;

    // Note that the logs are stored as std::string/TEXT which is Ok since
    // they are UTF-8 and our database is UTF-8.
    //
    #pragma db section(results_section)
    operation_results results;

    #pragma db load(lazy) update(always)
    odb::section results_section;

    // Database mapping.
    //
    #pragma db member(id) id column("")

    #pragma db member(package_name) transient
    #pragma db member(package_version) \
      set(this.package_version.init (this.id.package.version, (?)))
    #pragma db member(configuration) transient
    #pragma db member(toolchain_version) \
      set(this.toolchain_version.init (this.id.toolchain_version, (?)))

    #pragma db member(results) id_column("") value_column("")

    build (const build&) = delete;
    build& operator= (const build&) = delete;

  private:
    friend class odb::access;
    build ()
        : package_name (id.package.name), configuration (id.configuration) {}
  };
}

#endif // LIBBREP_BUILD_HXX