def null


def program-name

func println { |
    print "\n" print
}

{ any | with type ;
    null clone type settype "construct" dyn-objcall
} "new" "str" dyn-def-method

construct _mega-ext {
    ;
    swap { .. | with this ;
        i mswap
        i -- mswap
    }
    mswap { .. | mswap }
    foreach { | with this ;
        def i 0 =i
        while { i this lt } { i callable call i ++ =i }
    }
} include _mega-ext in mega

construct _array-ext {
    ;
    get { any | array-get }
    sget { any|null | with idx this ;
        idx this:len lt idx -1 gt and dup if {
            pop
            idx this:get 
            2 stop
        } not if {
            null
        }
    }
    len { mega | array-len }
    set { any | array-set }
    to-stack { .. | with this ;
        def len this:len =len
        def i 0 =i
        while { i len lt } {
            i this:get
            i ++ =i
        }
    }
    foreach { | with callable this ; 
        def i 0 =i
        while { i this:len lt } { i this:get callable call i ++ =i }
    }
    0 { any | with this ;
        0 this:get
    }
    1 { any | with this ;
        1 this:get
    }
    2 { any | with this ;
        2 this:get
    }
    3 { any | with this ;
        3 this:get
    }
    4 { any | with this ;
        4 this:get
    }
} include _array-ext in array

"iter.spl" import

construct List {
    array
    ;
    construct { this | with array this ; 
        array this:=array
        this
    }
    get { any | _:array:get }
    sget { any|null | _:array:sget }
    len { mega | _:array:len }
    set { any | _:array:set }
}
construct _GrowingArray {
    ;
    push-front { | with item this ;
        [ item this:array:to-stack ] this:=array
    }
    push { | with item this ;
        [ this:array:to-stack item ] this:=array
    }
    insert { | with item index this ;
        this:array:len index - =index
        [ this:array:to-stack index:mswap item (index ++):mswap ] this:=array
    }
}
construct _ShrinkingArray {
    ;
    pop-front { any | with this ;
        0 this:remove
    }
    pop { any | with this ; 
        this:array:len not if {
            null 2 stop
        }
        def item
        [ this:array:to-stack =item ] this:=array
        item
    }
    remove { any | with index this ;
        this:array:len not if {
            null 2 stop
        }
        def item
        this:array:len index - =index
        [ this:array:to-stack index:mswap =item (index --):mswap ] this:=array
        item
    }
}

include _GrowingArray in List
include _ShrinkingArray in List

construct ArrayIter {
    array
    idx
    ;
    construct { this | with array this ;
        array this:=array
        0 this:=idx
        this
    }
    next { any | with this ; 
        this:idx dup ++ this:=idx this:array:sget
    }
}
construct _IterableArray {
    ;
    iter { ArrayIter | with this ;
        this gettype "array" eq dup if {
            pop
            this ArrayIter:new
            2 stop
        } not if {
            this:array ArrayIter:new
        }
    }
}
include _Iter in ArrayIter
include _IterableArray in List
include _IterableArray in array

construct MicroMap {
    pairs
    ;
    construct { this | with pairs this ;
        pairs null eq if {
            0 anew List:new =pairs
        }
        pairs:unwrap this:=pairs
        this
    }
    get-entry { [any,any]|null | with key this ;
        this:pairs:iter
            { mega | 0 swap:get key eq } swap:filter
            _:next
    }
    get-or-create-entry { [any,any] | with key this ;
        { [any,any] | 
            [ key null ] dup this:pairs:push
        } key this:get-entry:unwrap-or
    }
    get { any | with key this ;
        this:pairs:iter
            { mega | 0 swap:get key eq } swap:filter
            { any | 1 swap:get } swap:map
            _:next
    }
    set { any | with key val this ;
        val 1 (key this:get-or-create-entry):set
    }
    remove { any | with key this ;
        this:pairs:iter
            { mega | 0 swap:get key eq not } swap:filter
            _:collect
            List:new
            =pairs
    }
    iter { ArrayIter | with this ;
        this:pairs:iter
    }
}

construct Range {
    lower 
    upper 
    step
    ;
    construct { this | with lower upper this ;
        lower _mega this:=lower
        upper _mega this:=upper
        1 this:=step
        this
    }
    set-step { this | with step this ; 
        step this:=step
        this
    }
    iter { RangeIter | with this ;
        this RangeIter:new
    }
    item { mega|null | with index this ;
        def itm index this:step * this:lower + =itm
        (itm this:upper lt) (itm this:lower lt not) and dup if {
            pop
            itm
            2 stop
        } not if {
            null
            2 stop
        }
    }
}

construct RangeIter {
    range
    idx
    ;
    construct { this | with range this ;
        range this:=range
        0 this:=idx
        this
    }
    next { mega | with this ;
        this:idx dup ++ this:=idx this:range:item
    }
}

include _Iter in RangeIter

construct shadow { }

"Copy array";
func acopy { array | with arr1 arr2 idx1 idx2 len ;

    def i 0 =i
    while { i len lt } {
        (( i idx1 + ) arr1:get) (i idx2 +) arr2:set;
        i ++ =i
    }

    arr2
}

func aadd { array | with arr1 arr2 ;

    def newarr arr1:len arr2:len + anew =newarr

    arr1 newarr 0 0        arr1:len acopy =newarr
    arr2 newarr 0 arr1:len arr2:len acopy =newarr

    newarr
}

func concat { str | with a b ;
    a _array b _array aadd _str
}

func panic { | with msg ;
    program-name dup if {
        program-name print " panicked at:" println
    } not if {
        "Program panicked at:" println
    }
    { | with it ; 
        it println 
    } trace:foreach 
    "Panic message:" println
    "  " print msg println
    def map env =map
    "SPL_PANIC_DUMP" env:get dup if {
        "Dumping because SPL_PANIC_DUMP is set." println
        null =map
        dyn-__dump
    } not if {
        "SPL_PLAIN_PANIC" map:get dup if {
            "Not dumping because SPL_PLAIN_PANIC is set." println
        } not if {
            "Type 'Yes^M' to dump. You can set SPL_PANIC_DUMP to always dump "
            "on panic, or SPL_PLAIN_PANIC to never dump." concat println
            readln "Yes" eq if {
                null =map
                dyn-__dump
            }
        }
    }
    "Exiting." println
    1 exit
}

{ | with msg this ;
    this not if {
        "Assertion failed!" panic
    }
} "assert" "int" dyn-def-method

{ | with msg this ;
    this if {
        "Assertion failed!" panic
    }
} "nassert" "int" dyn-def-method

func assert-eq { any any | with a b ;
    a b eq not if {
        "Equality assertion failed!" panic
    }
    a b
}

func [ { shadow |
    "array" "shadow" settype
}

func ] { array |
    [ alit-end
}

func env { MicroMap |
    get-env List:new MicroMap:new
}

func ++ { mega |
    1 +
}

func -- { mega |
    1 -
}

func _ { | }

func call-main-on-file { | with file ;
    "@" file concat import 
    update-types
    argv main exit
}

func update-types { | 
    { | with type ;
        { self | } "unwrap" type dyn-def-method
        { self | swap pop } "unwrap-or" type dyn-def-method
    } dyn-all-types:foreach
    { | with this ;
        "null cannot be unwrapped." panic
    } "unwrap" "null" dyn-def-method
    { any | with fb this ;
        fb call
    } "unwrap-or" "null" dyn-def-method
}
update-types