During the struggle at his Charteris Bay door, the police officer received a bleeding nose and a fat lip along with scratching on his arms, tenderness to his right arm, a sore left knee and right foot.
A gang's disastrous "visit" to a random Christchurch house went wrong - because a police officer lived there.
The July 2017 Charteris Bay home invasion has led to a two-year, seven-month jail term for one of those involved, Norton Lindsay Adams, a Nomads gang member.
The Crown said Adams and another man were patched members of the Nomads gang and a third person allegedly involved was linked to them.
They drove to a random house in Charteris Bay, on the Banks Peninsula near Christchurch, where a constable lived at 10.30pm on July 3, the court heard.
The incident escalated quickly when the person who knocked on the door claimed to be with the police.
When that person was questioned and refused to leave, the real officer made an arrest. In the fight that followed, Adams punched the cop twice in the face and broke his glasses. He also stomped on the man's bare foot before the officer retreated inside.
Adams drove erratically on Dyers Pass Rd before the vehicle was stopped by police. A pump-action shotgun was found inside.
During the struggle at the door, the victim received a bleeding nose and a fat lip along with scratching on his arms, tenderness to his right arm, a sore left knee and right foot.
Nomads gang member Norton Lindsay Adams, 26, has pleaded guilty to a series of charges after a "visit" to the wrong Christchurch house found a police officer lived there.
Adams, 26, pleaded guilty to a series of charges in the Christchurch District Court and was sentenced immediately by Judge Jane Farish on Friday after he waived the right to a pre-sentence report.
At least one of the others allegedly involved in the incident is pleading not guilty and faces trial.
Adams has admitted charges of assault, unlawful possession of a firearm, reckless driving and failing to stop for the police for the Charteris Bay incident. He admitted assault with intent to injure and unlawful possession of a firearm for a separate incident.
Judge Farish said after receiving a letter from Adams that she believed he was starting to have insight into the effects of his offending and his lifestyle.
He had been on electronically-monitored bail for several months, but had accepted that by pleading guilty he was going straight back to jail. The question was then whether he would be able to stay away from negative influences.
As well as the jail term, she disqualified him from driving for 15 months.