class Git::Semaphore::Project

  def self.env_overrides
    ENV.to_h.select { |key, _| key.start_with? 'SEMAPHORE_' }
  end

  def self.from_repo git_repo
    self.from_config({
      'SEMAPHORE_PROJECT_NAME' => git_repo.full_name,
      'SEMAPHORE_BRANCH_NAME'  => git_repo.head.name.split('/').last,
      'SEMAPHORE_COMMIT_SHA'   => git_repo.head.target.oid,
      'SEMAPHORE_BUILD_NUMBER' => nil
    }.merge(env_overrides))
  end

  def self.from_config config
    self.new(
      full_name:      config['SEMAPHORE_PROJECT_NAME'],
      branch_name:    config['SEMAPHORE_BRANCH_NAME'],
      options: {
        commit_sha:   config['SEMAPHORE_COMMIT_SHA'],
        build_number: config['SEMAPHORE_BUILD_NUMBER'],
      }
    )
  end

  def initialize full_name:, branch_name:, options:
    @auth_token   = Git::Semaphore.auth_token
    @full_name    = full_name
    @owner, @name = full_name.split('/')
    @branch_name  = branch_name || 'master'
    @commit_sha   = options[:commit_sha]
    @build_number = options[:build_number]
  end

  def settings
    {
      auth_token:   @auth_token,
      project_name: @full_name,
      branch_name:  @branch_name,
      commit_sha:   @commit_sha,
      build_number: @build_number,
    }
  end

  def internals
    settings.merge({
      project: {
        owner:      @owner,
        name:       @name,
        full_name:  @full_name,
        hash_id:    project_hash_id,
        url:        project_url,
      },
      branch: {
        name:       @branch_name,
        id:         branch_id,
        url:        branch_url,
      },
      build: {
        number:     build_number,
        result:     build_result,
        url:        build_url,
      },
    })
  end

  #
  # build-related queries: default to latest one...
  #

  def build_number
    @build_number ||= history['builds'].first['build_number'].to_s
  end

  def build_result
    @build_result ||= history['builds'].first['result']
  end

  #
  # direct links to semaphore.ci
  #

  def project_url
    project_hash['html_url']
  end

  def branch_url
    branch_hash = project_hash['branches'].find { |hash|
      hash['branch_name'] == @branch_name
    }
    branch_hash['branch_url']
  end

  def build_url
    build_hash = history['builds'].find { |hash|
      hash['build_number'].to_s == @build_number
    }
    build_hash['build_url']
  end

  #
  # API related queries
  #

  def self.all
    Git::Semaphore::API::Cache.projects(Git::Semaphore.auth_token)
  end

  class << self
    alias_method :projects, :all
  end

  def branches
    Git::Semaphore::API::Cache.branches(project_hash_id, @auth_token)
  end

  def status
    Git::Semaphore::API::Cache.status(project_hash_id, branch_id, @auth_token)
  end

  def history
    Git::Semaphore::API::Cache.history(project_hash_id, branch_id, @auth_token)
  end

  def information
    Git::Semaphore::API::Cache.information(project_hash_id, branch_id, build_number, @auth_token,)
  end

  def log
    Git::Semaphore::API::Cache.log(project_hash_id, branch_id, build_number, @auth_token,)
  end

  def rebuild
    Git::Semaphore::API.rebuild(project_hash_id, branch_id, @auth_token)
  end

  private

  def project_hash_for owner, name
    self.class.projects.find { |project_hash|
      project_hash['owner'] == owner && project_hash['name'] == name
    }
  end

  def project_hash
    project_hash_for(@owner, @name)
  end

  def project_hash_id_for owner, name
    project_hash_for(owner, name)['hash_id']
  end

  def project_hash_id
    project_hash_id_for(@owner, @name)
  end

  def branch_hash_for branch_name
    branches.find { |branch_hash|
      branch_hash['name'] == branch_name
    }
  end

  def branch_hash
    branch_hash_for(@branch_name)
  end

  def branch_id_for branch_name
    branch_hash_for(branch_name)['id'].to_s
  end

  def branch_id
    branch_id_for(@branch_name)
  end

end