#!/usr/bin/env python3


def addition(Model):
    prods = []

    start_add = Model.productionstring(
        name="start_add",
        string="""
        =g>
        isa         math_goal
        op          add
        task        calc
        =imaginal>
        isa          math_op
        op           add
        ones1        =num1
        ones2        =num2
        ones_ans      None
        ==>
        =imaginal>
        isa          math_op
        ones_ans     busy
        +retrieval>
        isa         math_op
        op          add
        arg1        =num1
        arg2        =num2
    """,
    )
    prods.append(start_add)

    add_ones = Model.productionstring(
        name="add_ones",
        string="""
        =g>
        isa         math_goal
        task        calc
        =imaginal>
        isa         math_op
        op          add
        ones_ans     busy
        ones1        =num1
        ones2        =num2
        =retrieval>
        isa         math_op
        arg1      =num1
        arg2      =num2
        result    =result
        ==>
        =imaginal>
        isa         math_op
        ones_ans    =result
        carry_ones       busy
        +retrieval>
        isa         math_op
        op          add
        arg1        10
        result      =result
    """,
    )
    prods.append(add_ones)

    process_carry_ones = Model.productionstring(
        name="process_carry_ones",
        string="""
        =g>
        isa         math_goal
        task        calc
        =imaginal>
        isa         math_op
        op          add
        tens1       =num1
        tens2       =num2
        carry_ones       busy
        ones_ans    =ones
        =retrieval>
        isa         math_op
        op          add
        arg1        10
        result      =ones
        arg2        =remainder
        ==>
        =imaginal>
        isa         math_op
        op          add
        carry_ones       1
        tens_ans    busy
        ones_ans     =remainder
        +retrieval>
        isa         math_op
        op          add
        arg1        =num1
        arg2        =num2
    """,
    )
    prods.append(process_carry_ones)

    no_carry_ones = Model.productionstring(
        name="no_carry_ones",
        string="""
        =g>
        isa         math_goal
        task        calc
        =imaginal>
        isa         math_op
        op          add
        tens1       =num1
        tens2       =num2
        ones_ans    =ones
        carry_ones       busy
        ?retrieval>
        state      error
        ==>
        =imaginal>
        isa         math_op
        carry_ones       None
        tens_ans    busy
        +retrieval>
        isa         math_op
        arg1        =num1
        arg2        =num2
    """,
    )
    prods.append(no_carry_ones)

    add_tens_done = Model.productionstring(
        name="add_tens_done",
        string="""
        =g>
        isa         math_goal
        task        calc
        =imaginal>
        isa         math_op
        op          add
        tens_ans    busy
        carry_ones  None
        =retrieval>
        isa         math_op
        op          add
        result      =sum
        ==>
        =imaginal>
        isa         math_op
        tens_ans    =sum
        carry_tens  busy
        +retrieval>
        isa         math_op
        op          add
        arg1        10
        result      =sum
        """,
    )
    prods.append(add_tens_done)

    add_tens_carry = Model.productionstring(
        name="add_tens_carry",
        string="""
        =g>
        isa         math_goal
        task        calc
        =imaginal>
        isa         math_op
        op          add
        tens_ans    busy
        tens1       =num1
        tens2       =num2
        carry_ones       1
        =retrieval>
        isa         math_op
        op          add
        result      =sum
        arg1       =num1
        arg2       =num2
        ==>
        =imaginal>
        isa         math_op
        carry_ones       None
        ~retrieval>
        +retrieval>
        isa         math_op
        op          add
        arg1        1
        arg2        =sum
        """,
    )
    prods.append(add_tens_carry)


    process_carry_tens = Model.productionstring(
        name="process_carry_tens",
        string="""
        =g>
        isa         math_goal
        task        calc
        =imaginal>
        isa         math_op
        op          add
        hundreds1       =num1
        hundreds2       =num2
        carry_tens       busy
        tens_ans    =tens
        =retrieval>
        isa         math_op
        op          add
        arg1        10
        result      =tens
        arg2        =remainder
        ==>
        =imaginal>
        isa         math_op
        op          add
        carry_tens       1
        hundreds_ans    busy
        tens_ans     =remainder
        +retrieval>
        isa         math_op
        op          add
        arg1        =num1
        arg2        =num2
    """,
    )
    prods.append(process_carry_tens)

    no_carry_tens = Model.productionstring(
        name="no_carry_tens",
        string="""
        =g>
        isa         math_goal
        task        calc
        =imaginal>
        isa         math_op
        op          add
        hundreds1       =num1
        hundreds2       =num2
        tens_ans    =tens
        carry_tens       busy
        ?retrieval>
        state      error
        ==>
        =imaginal>
        isa         math_op
        carry_tens       None
        hundreds_ans    busy
        ~retrieval>
        +retrieval>
        isa         math_op
        arg1        =num1
        arg2        =num2
    """,
    )
    prods.append(no_carry_tens)

    add_hundreds_done = Model.productionstring(
        name="add_hundreds_done",
        string="""
        =g>
        isa         math_goal
        task        calc
        =imaginal>
        isa         math_op
        op          add
        hundreds_ans    busy
        carry_tens  None
        =retrieval>
        isa         math_op
        op          add
        result      =sum
        ==>
        =g>
        isa         math_goal
        task        done
        =imaginal>
        isa         math_op
        hundreds_ans    =sum
        """,
    )
    prods.append(add_hundreds_done)

    add_hundreds_carry = Model.productionstring(
        name="add_hundreds_carry",
        string="""
        =g>
        isa         math_goal
        task        calc
        =imaginal>
        isa         math_op
        op          add
        hundreds_ans    busy
        hundreds1       =num1
        hundreds2       =num2
        carry_tens       1
        =retrieval>
        isa         math_op
        op          add
        result      =sum
        arg1       =num1
        arg2       =num2
        ==>
        =imaginal>
        isa         math_op
        carry_tens       None
        ~retrieval>
        +retrieval>
        isa         math_op
        op          add
        arg1        1
        arg2        =sum
        """,
    )
    prods.append(add_hundreds_carry)

    # addition_done = Model.productionstring(
    #     name="addition_done",
    #     string="""
    #     =g>
    #     isa         math_goal
    #     task        done
    #     ==>
    #     ?g>
    #     """
    # )
    # prods.append(addition_done)

    return prods