Challenge House Head

is_available = OR = {
	government_has_flag = government_is_clan
	government_is_japanese_trigger = yes
}
trigger_if = {
	limit = {
		is_ai = yes
	}
	is_house_head = no
	is_physically_able = yes
}
is_shown = has_fp3_dlc_trigger = yes
scope:actor = {
	this != scope:recipient
	house ?= {
		house_head ?= scope:recipient
		OR = {
			has_house_unity_parameter = unity_can_challenge_house_head
			house_head ?= {
				government_is_japanese_trigger = yes
			}
			scope:actor = {
				any_character_struggle = {
					has_struggle_phase_parameter = unlocks_challenge_house_head_for_clans
				}
			}
		}
	}
}

As written in game/common/character_interactions/00_fp3_interactions.txt.

scope:actor = {
	is_at_war = no
	is_available_adult = yes
}
scope:recipient = {
	is_at_war = no
	is_available_adult = yes
	custom_tooltip = {
		text = fp3_challenge_house_head_interaction_tier_tt
		tier_difference = {
			target = scope:actor
			value <= 1
		}
	}
	custom_tooltip = {
		text = fp3_challenge_house_head_interaction_recent_tt
		NOT = {
			has_character_flag = fp3_challenge_house_head_recent_flag
		}
	}
	tgp_is_ceremonial_liege_trigger = no
}
scope:actor = {
	custom_tooltip = {
		text = fp3_challenge_house_head_interaction_accepted_tt
		NOT = {
			has_character_flag = accepted_house_head_challenge_flag
		}
	}
}
scope:recipient = {
	custom_tooltip = {
		text = fp3_challenge_house_head_interaction_ongoing_tt
		NOT = {
			has_character_flag = ongoing_house_head_challenge_flag
		}
	}
}

As written in game/common/character_interactions/00_fp3_interactions.txt.

on_send = scope:recipient = {
	add_character_flag = {
		flag = ongoing_house_head_challenge_flag
		months = 1
	}
	add_character_flag = {
		flag = ai_cooldown_house_head_challenge_flag
		years = 5
	}
}
on_accept = scope:recipient = {
	save_scope_as = house_head
}
if = {
	limit = {
		OR = {
			scope:recipient = {
				is_vassal_or_below_of = scope:actor
			}
			scope:recipient = {
				is_ruler = no
			}
		}
	}
	scope:actor.house = {
		set_house_head = scope:actor
	}
}
else = {
	scope:actor = {
		save_scope_as = house_challenger
		if = {
			limit = {
				scope:hook = yes
			}
			use_hook = scope:house_head
		}
		if = {
			limit = {
				scope:diplomacy = yes
			}
			custom_tooltip = fp3_challenge_house_head_interaction_tooltip_actor.diplomacy
			trigger_event = fp3_misc_decisions.0026
			scope:house_head = {
				custom_tooltip = fp3_challenge_house_head_interaction_tooltip_recipient.diplomacy
			}
			house = {
				add_clan_unity_interaction_effect = {
					CHARACTER = scope:house_challenger
					TARGET = scope:house_head
					VALUE = minor_unity_loss
					DESC = clan_unity_challenged_to_duel.desc
					REVERSE_NON_HOUSE_TARGET = yes
				}
			}
		}
		else = {
			if = {
				limit = {
					scope:lethal = no
				}
				custom_tooltip = fp3_challenge_house_head_interaction_tooltip_actor.a
				scope:house_head = {
					custom_tooltip = fp3_challenge_house_head_interaction_tooltip_recipient.b
				}
				house = {
					add_clan_unity_interaction_effect = {
						CHARACTER = scope:house_challenger
						TARGET = scope:house_head
						VALUE = minor_unity_loss
						DESC = clan_unity_challenged_to_duel.desc
						REVERSE_NON_HOUSE_TARGET = yes
					}
				}
			}
			else = {
				custom_tooltip = fp3_challenge_house_head_interaction_tooltip_actor.a.lethal
				scope:house_head = {
					custom_tooltip = fp3_challenge_house_head_interaction_tooltip_recipient.b.lethal
				}
				house = {
					add_clan_unity_interaction_effect = {
						CHARACTER = scope:house_challenger
						TARGET = scope:house_head
						VALUE = major_unity_loss
						DESC = clan_unity_challenged_to_duel.desc
						REVERSE_NON_HOUSE_TARGET = yes
					}
				}
			}
			scope:actor = {
				custom_description_no_bullet = {
					text = challenge_house_head_japanese_admin
				}
				if = {
					limit = {
						government_is_japanese_trigger = yes
						tgp_soryo_or_bushido_trigger = no
					}
					if = {
						limit = {
							scope:lethal = no
						}
						add_prestige = medium_prestige_loss
					}
					else = {
						add_prestige = major_prestige_loss
						add_prestige_level = -1
					}
				}
			}
			trigger_event = fp3_misc_decisions.0022
		}
	}
	if = {
		limit = {
			scope:diplomacy = no
		}
		if = {
			limit = {
				scope:lethal = no
			}
			custom_tooltip = fp3_challenge_house_head_interaction_duel_tooltip_warning
		}
		else = {
			custom_tooltip = fp3_challenge_house_head_interaction_duel_tooltip_warning_lethal
		}
	}
}
on_decline = scope:actor = {
	trigger_event = fp3_misc_decisions.0025
}
scope:recipient = {
	add_prestige = major_prestige_loss
	remove_character_flag = ongoing_house_head_challenge_flag
}

As written in game/common/character_interactions/00_fp3_interactions.txt.