class Job
    attr_reader :id, :job_id, :company_id
    # connect to postgres
    DB = PG.connect(host: "localhost", port: 5432, dbname: 'contacts')

    def initialize(opts = {})
        @id = opts["id"].to_i
        @person_id = opts["person_id"].to_i
        @company_id = opts["company_id"].to_i
    end

    def self.all
        results = DB.exec("SELECT * FROM jobs;")
        return results.map { |result| Job.new(result) }
    end

    def self.find(id)
        results = DB.exec("SELECT * FROM jobs WHERE id=#{id};")
        return Job.new(results.first)
    end

    def self.create(opts={})
        results = DB.exec(
            <<-SQL
                INSERT INTO jobs (person_id, company_id)
                VALUES ( #{opts["person_id"]}, #{opts["company_id"]} )
                RETURNING id, person_id, company_id;
            SQL
        )
        return Job.new(results.first)
    end

    def self.delete(id)
        results = DB.exec("DELETE FROM jobs WHERE id=#{id};")
        return { deleted: true }
    end

    def self.update(id, opts={})
        results = DB.exec(
            <<-SQL
                UPDATE jobs
                SET person_id=#{opts["person_id"]}, company_id=#{opts["company_id"]}
                WHERE id=#{id}
                RETURNING id, person_id, company_id;
            SQL
        )
        return Job.new(results.first)
    end
end