@startuml

!include https://raw.githubusercontent.com/plantuml-stdlib/C4-PlantUML/master/C4_Context.puml
!include https://raw.githubusercontent.com/plantuml-stdlib/C4-PlantUML/master/C4_Container.puml

Person(contributor, "Contributor", "Developer improving or extending MetroSim")

System_Ext(metroweb, "MetroWeb", "Web-based user interface and Web API")

System_Boundary(metrosim, "MetroSim") {
    Container(initializer, "Initializer", "Python", "Computes data needed by the simulator from raw input data")
    Container(simulator, "Simulator", "Python", "Iteratively simulates trips until convergence is reached")
    ContainerDb(files, "I/O Files", "CSV", "Input and output files")
}

Rel(initializer, files, "Reads raw input data, writes pre-processed data")
Rel(simulator, files, "Reads raw and pre-processed input data, writes output data")

Rel(contributor, initializer, "Runs / Develops")
Rel(contributor, simulator, "Runs / Develops")
Rel(contributor, files, "Writes raw input data")

Rel(metroweb, initializer, "Runs")
Rel(metroweb, simulator, "Runs")
Rel(metroweb, files, "Writes raw input data")

SHOW_DYNAMIC_LEGEND()

@enduml