# Customer dynamics
# Use the full canonical form for recurrence references. Bracket shorthand such as
# SaaSPL::[Account.Customers]:Year[PREV] is not supported.
# Base year is explicit; later years are explicit recurrence rules to avoid overlap.
rule SaaSPL::Account.Customers:Year.2026:Scenario.* = Drivers::[Driver.StartingCustomers]
rule SaaSPL::Account.Customers:Year.2027:Scenario.* = SaaSPL::Account.Customers:Year[PREV] + Drivers::[Driver.NewCustomers] - SaaSPL::[Account.ChurnedCustomers]
rule SaaSPL::Account.Customers:Year.2028:Scenario.* = SaaSPL::Account.Customers:Year[PREV] + Drivers::[Driver.NewCustomers] - SaaSPL::[Account.ChurnedCustomers]

rule SaaSPL::Account.ChurnedCustomers:Year.2026:Scenario.* = Drivers::[Driver.StartingCustomers] * Drivers::[Driver.ChurnRate]
rule SaaSPL::Account.ChurnedCustomers:Year.2027:Scenario.* = SaaSPL::Account.Customers:Year[PREV] * Drivers::[Driver.ChurnRate]
rule SaaSPL::Account.ChurnedCustomers:Year.2028:Scenario.* = SaaSPL::Account.Customers:Year[PREV] * Drivers::[Driver.ChurnRate]

# Driver visibility in the PL cube
rule SaaSPL::Account.NewCustomers:Year.*:Scenario.* = Drivers::[Driver.NewCustomers]
rule SaaSPL::Account.ChurnRate:Year.*:Scenario.* = Drivers::[Driver.ChurnRate]
rule SaaSPL::Account.ARPU:Year.*:Scenario.* = Drivers::[Driver.ARPU]

# Financial outputs
rule SaaSPL::Account.Revenue:Year.*:Scenario.* = SaaSPL::[Account.Customers] * SaaSPL::[Account.ARPU]
rule SaaSPL::Account.COGS:Year.*:Scenario.* = SaaSPL::[Account.Revenue] * Drivers::[Driver.COGS_Rate]
rule SaaSPL::Account.GrossProfit:Year.*:Scenario.* = SaaSPL::[Account.Revenue] - SaaSPL::[Account.COGS]
rule SaaSPL::Account.OperatingExpense:Year.*:Scenario.* = Drivers::[Driver.OperatingExpense]
rule SaaSPL::Account.EBITDA:Year.*:Scenario.* = SaaSPL::[Account.GrossProfit] - SaaSPL::[Account.OperatingExpense]