1	import Base
2	import ./world.bend as W
3	import ./system.bend as Sys
4	import ./schedule.bend as Sch
5	
6	def after_condition(~S: Data,~C: Type,~R: Type,~E: Data,~H: Type,~Error: Data,~skip: H -> W.World<S,C,R,E> -> U32 -> H & W.World<S,C,R,E>,~dispatch: H -> W.World<S,C,R,E> -> U32 -> H & Sys.Outcome<W.World<S,C,R,E>,Error,Unit>,next: H -> W.World<S,C,R,E> -> List<&2,Sch.Observation> -> Sch.RunResult<S,C,R,E,H,Error>,checked: W.World<S,C,R,E> & Result<Error,Bool>,owners: H,+namespace: U32,+name: String,+all: List<&2,Sch.Step>,+observations: List<&2,Sch.Observation>,+id: U32) -> Sch.RunResult<S,C,R,E,H,Error>:
7	  match checked:
8	    case (world,Fail{error}): Sch.Failed{Sch.Schedule{namespace,name,all,owners},world,error,observations}
9	    case (world,Done{allowed}): Sch.conditioned_skip(~S,~C,~R,~E,~H,~Error,~skip,~dispatch,next,allowed,owners,world,namespace,name,all,observations,id)
10	
11	def execute_skip(~S: Data,~C: Type,~R: Type,~E: Data,~H: Type,~Error: Data,~skip: H -> W.World<S,C,R,E> -> U32 -> H & W.World<S,C,R,E>,~dispatch: H -> W.World<S,C,R,E> -> U32 -> H & Sys.Outcome<W.World<S,C,R,E>,Error,Unit>,~condition: W.World<S,C,R,E> -> U32 -> W.World<S,C,R,E> & Result<Error,Bool>,steps: List<&2,Sch.Step>,owners: H,world: W.World<S,C,R,E>,+namespace: U32,+name: String,+all: List<&2,Sch.Step>,+observations: List<&2,Sch.Observation>) -> Sch.RunResult<S,C,R,E,H,Error>:
12	  match steps:
13	    case []: Sch.Finished{Sch.Schedule{namespace,name,all,owners},world,observations}
14	    case Sch.Phase{phase} <> rest: execute_skip(~S,~C,~R,~E,~H,~Error,~skip,~dispatch,~condition,rest,owners,world,namespace,name,all,List.append(&2,Sch.Observation,observations,[Sch.Entered{phase}]))
15	    case Sch.Barrier{} <> rest: execute_skip(~S,~C,~R,~E,~H,~Error,~skip,~dispatch,~condition,rest,owners,W.barrier(~S,~C,~R,~E,world),namespace,name,all,List.append(&2,Sch.Observation,observations,[Sch.Applied{}]))
16	    case Sch.System{+id,slot} <> rest: after_condition(~S,~C,~R,~E,~H,~Error,~skip,~dispatch,h => w => obs => execute_skip(~S,~C,~R,~E,~H,~Error,~skip,~dispatch,~condition,rest,h,w,namespace,name,all,obs),condition(world,slot),owners,namespace,name,all,observations,id)
17	
18	def run_checked_skip(~S: Data,~C: Type,~R: Type,~E: Data,~H: Type,~Error: Data,~skip: H -> W.World<S,C,R,E> -> U32 -> H & W.World<S,C,R,E>,~dispatch: H -> W.World<S,C,R,E> -> U32 -> H & Sys.Outcome<W.World<S,C,R,E>,Error,Unit>,~condition: W.World<S,C,R,E> -> U32 -> W.World<S,C,R,E> & Result<Error,Bool>,allowed: Bool,schedule: Sch.Schedule<S,C,R,E,H>,world: W.World<S,C,R,E>) -> Sch.RunResult<S,C,R,E,H,Error>:
19	  match allowed schedule:
20	    case False{} schedule: Sch.Rejected{schedule,world}
21	    case True{} Sch.Schedule{+namespace,+name,+steps,owners}: execute_skip(~S,~C,~R,~E,~H,~Error,~skip,~dispatch,~condition,steps,owners,world,namespace,name,steps,[])
22	
23	
24	def run_actual_skip(~S: Data,~C: Type,~R: Type,~E: Data,~H: Type,~Error: Data,~skip: H -> W.World<S,C,R,E> -> U32 -> H & W.World<S,C,R,E>,~dispatch: H -> W.World<S,C,R,E> -> U32 -> H & Sys.Outcome<W.World<S,C,R,E>,Error,Unit>,~condition: W.World<S,C,R,E> -> U32 -> W.World<S,C,R,E> & Result<Error,Bool>,schedule: Sch.Schedule<S,C,R,E,H>,world: W.World<S,C,R,E>,+actual: U32) -> Sch.RunResult<S,C,R,E,H,Error>:
25	  match schedule:
26	    case Sch.Schedule{+namespace,+name,+steps,owners}: run_checked_skip(~S,~C,~R,~E,~H,~Error,~skip,~dispatch,~condition,U32.is_eq(namespace,actual),Sch.Schedule{namespace,name,steps,owners},world)
27	
28	def run_namespace_skip(~S: Data,~C: Type,~R: Type,~E: Data,~H: Type,~Error: Data,~skip: H -> W.World<S,C,R,E> -> U32 -> H & W.World<S,C,R,E>,~dispatch: H -> W.World<S,C,R,E> -> U32 -> H & Sys.Outcome<W.World<S,C,R,E>,Error,Unit>,~condition: W.World<S,C,R,E> -> U32 -> W.World<S,C,R,E> & Result<Error,Bool>,schedule: Sch.Schedule<S,C,R,E,H>,named: W.World<S,C,R,E> & U32) -> Sch.RunResult<S,C,R,E,H,Error>:
29	  (world,+actual) = named
30	  run_actual_skip(~S,~C,~R,~E,~H,~Error,~skip,~dispatch,~condition,schedule,world,actual)
31	
32	# Run ordered steps with fallible conditions and an explicit false-condition
33	# skip callback. Foreign namespace rejects before callbacks; condition failure
34	# stops with returned World/owners and prior observations. Explicit Barrier steps
35	# apply World.barrier; completion adds no final flush or schedule-wide rollback.
36	# Dispatch, condition and skip are trusted adapters with their own effect contracts.
37	def run_with_skip(~S: Data,~C: Type,~R: Type,~E: Data,~H: Type,~Error: Data,~skip: H -> W.World<S,C,R,E> -> U32 -> H & W.World<S,C,R,E>,~dispatch: H -> W.World<S,C,R,E> -> U32 -> H & Sys.Outcome<W.World<S,C,R,E>,Error,Unit>,~condition: W.World<S,C,R,E> -> U32 -> W.World<S,C,R,E> & Result<Error,Bool>,schedule: Sch.Schedule<S,C,R,E,H>,world: W.World<S,C,R,E>) -> Sch.RunResult<S,C,R,E,H,Error>:
38	  run_namespace_skip(~S,~C,~R,~E,~H,~Error,~skip,~dispatch,~condition,schedule,W.namespace(~S,~C,~R,~E,world))