flow = "router"
docs = "DESCRIPTION.md"

[[process]]
source = "context://stdio/readline"

[[connection]]
from = "readline/json"
to = "accumulate_triples/values"

[[process]]
alias = "accumulate_triples"
source = "lib://flowstdlib/data/accumulate"
input.partial = { once = [] }
input.chunk_size = { always = 3 }

# Loop back the partial arrays
[[connection]]
from = "accumulate_triples/partial"
to = "accumulate_triples/partial"

# Track top path to 'A' points
[[process]]
alias = "A_tracker"
source = "path_tracker"
input.forward_route = { once = "" }
input.forward_distance = { once = 0 }
input.other_route = { once = "" }
input.other_distance = { once = 0 }
input.forward_string = { always = "A" }
input.cross_string = { always = "BC" }

[[connection]] # A - top distance
from = "accumulate_triples/chunk/0"
to = "A_tracker/forward"

[[connection]] # B - bottom distance
from = "accumulate_triples/chunk/1"
to = "A_tracker/other"

[[connection]] # C - cross-over distance
from = "accumulate_triples/chunk/2"
to = "A_tracker/cross"

# Track top path to 'B' points
[[process]]
alias = "B_tracker"
source = "path_tracker"
input.forward_route = { once = "" }
input.forward_distance = { once = 0 }
input.forward_string = { always = "B" }
input.cross_string = { always = "C" }
input.other = { always = 0 }

[[connection]] # B - bottom distance
from = "accumulate_triples/chunk/1"
to = "B_tracker/forward"

[[connection]] # C - cross-over distance
from = "accumulate_triples/chunk/2"
to = "B_tracker/cross"

[[connection]]
from = "A_tracker/route"
to = "A_tracker/forward_route"

[[connection]]
from = "B_tracker/route"
to = "B_tracker/forward_route"

[[connection]]
from = "A_tracker/distance"
to = "A_tracker/forward_distance"

[[connection]]
from = "B_tracker/distance"
to = "B_tracker/forward_distance"

[[connection]]
from = "A_tracker/route"
to = "B_tracker/other_route"

[[connection]]
from = "B_tracker/route"
to = "A_tracker/other_route"

[[connection]]
from = "A_tracker/distance"
to = "B_tracker/other_distance"

[[connection]]
from = "B_tracker/distance"
to = "A_tracker/other_distance"

# combine the distance and route into a line
[[connection]]
from = "A_tracker/route"
to = "append/s1"

[[connection]]
from = "A_tracker/distance"
to = "to_string"

[[process]]
source = "lib://flowstdlib/fmt/to_string"

[[connection]]
from = "to_string"
to = "append/s2"

[[process]]
source = "lib://flowstdlib/data/append"

######## Print out the shortest route and it's length to each point 'A' - and the last one is the destination
[[connection]]
from = "append"
to = "stdout"

[[process]]
source = "context://stdio/stdout"