# frozen_string_literal: true

ROM::SQL.migration do
  change do
    # Track each instance of a partnership playing together in a match
    create_table :partnership_games do
      primary_key :id
      foreign_key :match_id, :matches, null: false
      foreign_key :player_1_id, :players, null: false
      foreign_key :player_2_id, :players, null: false
      column :team_number, Integer, null: false  # 1 or 2
      column :won_match, Integer, null: false  # 0 or 1 (SQLite doesn't have boolean)
      column :created_at, DateTime, null: false, default: Sequel::CURRENT_TIMESTAMP
    end

    add_index :partnership_games, [:player_1_id, :player_2_id, :match_id], unique: true
    add_index :partnership_games, :match_id
    add_index :partnership_games, [:player_1_id, :player_2_id]

    # Summary statistics for partnerships (denormalized for performance)
    create_table :partnership_stats do
      primary_key :id
      foreign_key :player_1_id, :players, null: false
      foreign_key :player_2_id, :players, null: false
      column :games_played, Integer, default: 0
      column :wins, Integer, default: 0
      column :losses, Integer, default: 0
      column :total_elo_change, Integer, default: 0
      column :last_played, DateTime
      column :created_at, DateTime, null: false, default: Sequel::CURRENT_TIMESTAMP
      column :updated_at, DateTime, null: false, default: Sequel::CURRENT_TIMESTAMP
    end

    add_index :partnership_stats, [:player_1_id, :player_2_id], unique: true
    add_index :partnership_stats, [:player_2_id, :player_1_id]  # For reverse lookups
  end
end