Invite House to Bloc

is_available = government_has_flag = government_has_house_blocs
OR = {
	is_landed = yes
	tgp_is_ceremonial_liege_trigger = yes
}
house.house_head ?= this
trigger_if = {
	limit = {
		is_ai = yes
	}
	OR = {
		is_landed = yes
		tgp_is_ceremonial_liege_trigger = yes
	}
	trigger_if = {
		limit = {
			NOT = {
				house.house_confederation.leading_house.house_head ?= this
			}
		}
		NOT = {
			any_confederation = {
				leading_house.house_head.top_liege ?= root.top_liege
				leading_house ?= {
					has_same_house_aspiration_as = root.house
				}
				has_leading_house = yes
			}
		}
	}
	trigger_if = {
		limit = {
			this != top_liege
			NOT = {
				exists = house.house_confederation
			}
		}
		any_confederation = {
			count < 5
			has_leading_house = yes
			leading_house.house_head.top_liege ?= root.top_liege
		}
	}
}
tgp_house_bloc_interaction_valid_trigger = yes
is_shown = scope:actor = {
	this != scope:recipient
	top_liege ?= scope:recipient.top_liege
	trigger_if = {
		limit = {
			exists = house.house_confederation
		}
		NOT = {
			scope:recipient.house.house_confederation ?= house.house_confederation
		}
	}
}
scope:recipient = {
	tgp_house_bloc_interaction_valid_trigger = yes
}

As written in game/common/character_interactions/10_tgp_japan_interactions.txt.

scope:actor = {
	is_at_war = no
	tgp_house_bloc_interaction_valid_showing_failures_trigger = yes
	trigger_if = {
		limit = {
			exists = confederation
		}
		custom_tooltip = {
			text = invite_to_house_bloc_leader_tt
			confederation.leading_house = house
		}
	}
	trigger_else = {
		custom_tooltip = {
			text = invite_to_house_bloc_tt
			is_house_head = yes
			is_ruler = yes
		}
	}
}
scope:recipient = {
	is_at_war = no
	tgp_house_bloc_interaction_valid_showing_failures_trigger = yes
	custom_tooltip = {
		text = join_bloc_vassal_house_tt
		trigger_if = {
			limit = {
				is_independent_ruler = no
				trigger_if = {
					limit = {
						exists = scope:secondary_recipient
					}
					NOT = {
						scope:secondary_recipient = scope:recipient.liege
					}
				}
			}
			OR = {
				liege = scope:actor.liege
				liege = scope:actor
				AND = {
					liege.liege = scope:actor
					scope:actor = {
						highest_held_title_tier < tier_empire
					}
				}
				liege = {
					house.house_confederation = scope:actor.house.house_confederation
				}
			}
		}
	}
	custom_tooltip = {
		text = join_bloc_left_cooldown_recipient_tt
		NOT = {
			house = {
				any_in_list = {
					variable = left_bloc_cooldown
					scope:actor.house.house_confederation ?= this
					save_temporary_scope_as = bloc_cooldown_temp
				}
			}
		}
	}
	custom_tooltip = {
		text = join_bloc_bloc_leader_tt
		trigger_if = {
			limit = {
				exists = scope:recipient.house.house_confederation
			}
			NOT = {
				scope:recipient.house.house_confederation.leading_house.house_head ?= scope:recipient
			}
		}
	}
	custom_tooltip = {
		text = join_bloc_recent_house_join_tt
		NOT = {
			scope:recipient.house = {
				has_variable = recently_joined_bloc
			}
		}
	}
	trigger_if = {
		limit = {
			scope:actor = {
				is_ai = yes
				NOT = {
					exists = house.house_confederation
				}
			}
		}
		is_landed = yes
	}
}

As written in game/common/character_interactions/10_tgp_japan_interactions.txt.

on_accept = scope:recipient = {
	house = {
		if = {
			limit = {
				exists = house_confederation
			}
			switch = {
				trigger = yes
				scope:hook = {
					set_variable = {
						name = bloc_leaving_reason
						value = flag:reason_bribe_hook
						days = 4
					}
				}
				scope:gold = {
					set_variable = {
						name = bloc_leaving_reason
						value = flag:reason_bribe_gold
						days = 4
					}
				}
				scope:prestige = {
					set_variable = {
						name = bloc_leaving_reason
						value = flag:reason_bribe_prestige
						days = 4
					}
				}
				scope:influence = {
					set_variable = {
						name = bloc_leaving_reason
						value = flag:reason_bribe_influence
						days = 4
					}
				}
				scope:influence = {
					set_variable = {
						name = bloc_leaving_reason
						value = flag:reason_bribe_influence
						days = 4
					}
				}
				fallback = {
					tgp_save_bloc_leaving_reason_effect = {
						LEAVING_HOUSE = scope:recipient.house
						INVITING_HOUSE = scope:actor.house
					}
				}
			}
		}
		tgp_leave_house_bloc_effect = {
			OPINION = flag:yes
			TRUCE = flag:no
		}
	}
	add_character_flag = {
		flag = invited_to_bloc_recently
		years = 2
	}
}
scope:actor = {
	if = {
		limit = {
			scope:hook = yes
		}
		use_hook = scope:recipient
	}
	else = {
		if = {
			limit = {
				scope:gold = yes
			}
			pay_short_term_gold = {
				target = scope:recipient
				gold = scope:recipient.medium_gold_value
			}
		}
		if = {
			limit = {
				scope:prestige = yes
			}
			add_prestige = scope:recipient.medium_prestige_loss
			scope:recipient = {
				add_prestige = medium_prestige_value
			}
		}
		if = {
			limit = {
				scope:influence = yes
			}
			change_influence = scope:recipient.medium_influence_loss
			scope:recipient = {
				change_influence = medium_influence_gain
			}
		}
		if = {
			limit = {
				scope:offer_hook = yes
			}
			scope:recipient = {
				add_hook = {
					type = favor_hook
					target = scope:actor
				}
			}
		}
		if = {
			limit = {
				scope:offer_hook_strong = yes
			}
			scope:recipient = {
				add_hook = {
					type = strong_favor_hook
					target = scope:actor
				}
			}
		}
	}
	house = {
		if = {
			limit = {
				NOT = {
					exists = house_confederation
				}
			}
			tgp_create_house_bloc_effect = {
				TYPE = none
			}
		}
	}
}
scope:recipient = {
	house ?= {
		tgp_join_house_bloc_effect = {
			INVITER = scope:actor.house
			OPINION = flag:yes
		}
	}
	custom_tooltip = forced_bloc_membership_tt
	add_character_flag = {
		flag = forced_bloc_membership
		years = 10
	}
}
on_decline = scope:recipient = {
	add_character_flag = {
		flag = invited_to_bloc_recently
		years = 4
	}
}

As written in game/common/character_interactions/10_tgp_japan_interactions.txt.