// ============================================================================
// 067 — Kanban Task Board
// ============================================================================
// Tasks flow through: backlog -> todo -> in_progress -> done.
//
// Run:   soma run 067_task_board.cell demo
// Expect:
//   Task 'Implement login' created
//   Task 'Write tests' created
//   Task 1 -> todo
//   Task 1 -> in_progress
//   Task 2 -> todo
//   Task 1 -> done!

cell TaskBoard {

    memory {
        tasks: Map<String, String> [persistent, consistent]
        status: Map<String, String> [persistent, consistent]
    }

    state task_status {
        initial: backlog

        backlog -> todo
        todo -> in_progress
        in_progress -> done
        in_progress -> blocked
        blocked -> in_progress
        done -> todo
        * -> cancelled
    }

    on create(title: String) {
        let id = to_string(next_id())
        tasks.set(id, title)
        status.set(id, "backlog")
        return map("id", id, "title", title, "status", "backlog")
    }

    on demo() {
        create("Implement login")
        print("Task 'Implement login' created")

        create("Write tests")
        print("Task 'Write tests' created")

        transition("1", "todo")
        print("Task 1 -> todo")

        transition("1", "in_progress")
        print("Task 1 -> in_progress")

        transition("2", "todo")
        print("Task 2 -> todo")

        transition("1", "done")
        print("Task 1 -> done!")

        return "done"
    }
}