package core

import (
	"fmt"

	"github.com/mediocregopher/ginger/seq"
	"github.com/mediocregopher/ginger/types"
)

type mathReduceFn func(types.Elem, types.Elem) types.Elem

func mathReduce(fn mathReduceFn, zero types.Elem, s seq.Seq) types.Elem {
	reduceFn := func(acc, el types.Elem) (types.Elem, bool) {
		return fn(acc, el), false
	}
	return seq.Reduce(reduceFn, zero, s)
}




func plusInt(a, b types.Elem) types.Elem {
	return types.GoType{ Int(a) + Int(b) }
}

func plusInt8(a, b types.Elem) types.Elem {
	return types.GoType{ Int8(a) + Int8(b) }
}

func plusInt16(a, b types.Elem) types.Elem {
	return types.GoType{ Int16(a) + Int16(b) }
}

func plusInt32(a, b types.Elem) types.Elem {
	return types.GoType{ Int32(a) + Int32(b) }
}

func plusInt64(a, b types.Elem) types.Elem {
	return types.GoType{ Int64(a) + Int64(b) }
}

func plusUint(a, b types.Elem) types.Elem {
	return types.GoType{ Uint(a) + Uint(b) }
}

func plusUint8(a, b types.Elem) types.Elem {
	return types.GoType{ Uint8(a) + Uint8(b) }
}

func plusUint16(a, b types.Elem) types.Elem {
	return types.GoType{ Uint16(a) + Uint16(b) }
}

func plusUint32(a, b types.Elem) types.Elem {
	return types.GoType{ Uint32(a) + Uint32(b) }
}

func plusUint64(a, b types.Elem) types.Elem {
	return types.GoType{ Uint64(a) + Uint64(b) }
}

func plusFloat32(a, b types.Elem) types.Elem {
	return types.GoType{ Float32(a) + Float32(b) }
}

func plusFloat64(a, b types.Elem) types.Elem {
	return types.GoType{ Float64(a) + Float64(b) }
}

func plusComplex64(a, b types.Elem) types.Elem {
	return types.GoType{ Complex64(a) + Complex64(b) }
}

func plusComplex128(a, b types.Elem) types.Elem {
	return types.GoType{ Complex128(a) + Complex128(b) }
}


func plusString(a, b types.Elem) types.Elem {
	return types.GoType{ String(a) + String(b) }
}

func Plus(s seq.Seq) types.Elem {
	var first, zero types.Elem
	
	if seq.Empty(s) {
		return types.GoType{ 0 }
	}
	first, _, _ = s.FirstRest()
	

	var fn mathReduceFn
	switch first.(types.GoType).V.(type) {
	
	case int:
		fn = plusInt
		
		zero = types.GoType{ int(0) }
		
	
	case int8:
		fn = plusInt8
		
		zero = types.GoType{ int8(0) }
		
	
	case int16:
		fn = plusInt16
		
		zero = types.GoType{ int16(0) }
		
	
	case int32:
		fn = plusInt32
		
		zero = types.GoType{ int32(0) }
		
	
	case int64:
		fn = plusInt64
		
		zero = types.GoType{ int64(0) }
		
	
	case uint:
		fn = plusUint
		
		zero = types.GoType{ uint(0) }
		
	
	case uint8:
		fn = plusUint8
		
		zero = types.GoType{ uint8(0) }
		
	
	case uint16:
		fn = plusUint16
		
		zero = types.GoType{ uint16(0) }
		
	
	case uint32:
		fn = plusUint32
		
		zero = types.GoType{ uint32(0) }
		
	
	case uint64:
		fn = plusUint64
		
		zero = types.GoType{ uint64(0) }
		
	
	case float32:
		fn = plusFloat32
		
		zero = types.GoType{ float32(0) }
		
	
	case float64:
		fn = plusFloat64
		
		zero = types.GoType{ float64(0) }
		
	
	case complex64:
		fn = plusComplex64
		
		zero = types.GoType{ complex64(0) }
		
	
	case complex128:
		fn = plusComplex128
		
		zero = types.GoType{ complex128(0) }
		
	
	
	case string:
		fn = plusString
		zero = types.GoType{string("")}
	
	default:
		panic(fmt.Sprintf("$#v cannot have Plus called on it", first))
	}

	return mathReduce(fn, zero, s)
}



func minusInt(a, b types.Elem) types.Elem {
	return types.GoType{ Int(a) - Int(b) }
}

func minusInt8(a, b types.Elem) types.Elem {
	return types.GoType{ Int8(a) - Int8(b) }
}

func minusInt16(a, b types.Elem) types.Elem {
	return types.GoType{ Int16(a) - Int16(b) }
}

func minusInt32(a, b types.Elem) types.Elem {
	return types.GoType{ Int32(a) - Int32(b) }
}

func minusInt64(a, b types.Elem) types.Elem {
	return types.GoType{ Int64(a) - Int64(b) }
}

func minusUint(a, b types.Elem) types.Elem {
	return types.GoType{ Uint(a) - Uint(b) }
}

func minusUint8(a, b types.Elem) types.Elem {
	return types.GoType{ Uint8(a) - Uint8(b) }
}

func minusUint16(a, b types.Elem) types.Elem {
	return types.GoType{ Uint16(a) - Uint16(b) }
}

func minusUint32(a, b types.Elem) types.Elem {
	return types.GoType{ Uint32(a) - Uint32(b) }
}

func minusUint64(a, b types.Elem) types.Elem {
	return types.GoType{ Uint64(a) - Uint64(b) }
}

func minusFloat32(a, b types.Elem) types.Elem {
	return types.GoType{ Float32(a) - Float32(b) }
}

func minusFloat64(a, b types.Elem) types.Elem {
	return types.GoType{ Float64(a) - Float64(b) }
}

func minusComplex64(a, b types.Elem) types.Elem {
	return types.GoType{ Complex64(a) - Complex64(b) }
}

func minusComplex128(a, b types.Elem) types.Elem {
	return types.GoType{ Complex128(a) - Complex128(b) }
}


func Minus(s seq.Seq) types.Elem {
	var first, zero types.Elem
	
	if seq.Empty(s) {
		panic("Minus cannot be called with no arguments")
	}
	zero, s, _ = s.FirstRest()
	first = zero
	

	var fn mathReduceFn
	switch first.(types.GoType).V.(type) {
	
	case int:
		fn = minusInt
		
	
	case int8:
		fn = minusInt8
		
	
	case int16:
		fn = minusInt16
		
	
	case int32:
		fn = minusInt32
		
	
	case int64:
		fn = minusInt64
		
	
	case uint:
		fn = minusUint
		
	
	case uint8:
		fn = minusUint8
		
	
	case uint16:
		fn = minusUint16
		
	
	case uint32:
		fn = minusUint32
		
	
	case uint64:
		fn = minusUint64
		
	
	case float32:
		fn = minusFloat32
		
	
	case float64:
		fn = minusFloat64
		
	
	case complex64:
		fn = minusComplex64
		
	
	case complex128:
		fn = minusComplex128
		
	
	
	default:
		panic(fmt.Sprintf("$#v cannot have Minus called on it", first))
	}

	return mathReduce(fn, zero, s)
}



func multInt(a, b types.Elem) types.Elem {
	return types.GoType{ Int(a) * Int(b) }
}

func multInt8(a, b types.Elem) types.Elem {
	return types.GoType{ Int8(a) * Int8(b) }
}

func multInt16(a, b types.Elem) types.Elem {
	return types.GoType{ Int16(a) * Int16(b) }
}

func multInt32(a, b types.Elem) types.Elem {
	return types.GoType{ Int32(a) * Int32(b) }
}

func multInt64(a, b types.Elem) types.Elem {
	return types.GoType{ Int64(a) * Int64(b) }
}

func multUint(a, b types.Elem) types.Elem {
	return types.GoType{ Uint(a) * Uint(b) }
}

func multUint8(a, b types.Elem) types.Elem {
	return types.GoType{ Uint8(a) * Uint8(b) }
}

func multUint16(a, b types.Elem) types.Elem {
	return types.GoType{ Uint16(a) * Uint16(b) }
}

func multUint32(a, b types.Elem) types.Elem {
	return types.GoType{ Uint32(a) * Uint32(b) }
}

func multUint64(a, b types.Elem) types.Elem {
	return types.GoType{ Uint64(a) * Uint64(b) }
}

func multFloat32(a, b types.Elem) types.Elem {
	return types.GoType{ Float32(a) * Float32(b) }
}

func multFloat64(a, b types.Elem) types.Elem {
	return types.GoType{ Float64(a) * Float64(b) }
}

func multComplex64(a, b types.Elem) types.Elem {
	return types.GoType{ Complex64(a) * Complex64(b) }
}

func multComplex128(a, b types.Elem) types.Elem {
	return types.GoType{ Complex128(a) * Complex128(b) }
}


func Mult(s seq.Seq) types.Elem {
	var first, zero types.Elem
	
	if seq.Empty(s) {
		return types.GoType{ 1 }
	}
	first, _, _ = s.FirstRest()
	

	var fn mathReduceFn
	switch first.(types.GoType).V.(type) {
	
	case int:
		fn = multInt
		
		zero = types.GoType{ int(1) }
		
	
	case int8:
		fn = multInt8
		
		zero = types.GoType{ int8(1) }
		
	
	case int16:
		fn = multInt16
		
		zero = types.GoType{ int16(1) }
		
	
	case int32:
		fn = multInt32
		
		zero = types.GoType{ int32(1) }
		
	
	case int64:
		fn = multInt64
		
		zero = types.GoType{ int64(1) }
		
	
	case uint:
		fn = multUint
		
		zero = types.GoType{ uint(1) }
		
	
	case uint8:
		fn = multUint8
		
		zero = types.GoType{ uint8(1) }
		
	
	case uint16:
		fn = multUint16
		
		zero = types.GoType{ uint16(1) }
		
	
	case uint32:
		fn = multUint32
		
		zero = types.GoType{ uint32(1) }
		
	
	case uint64:
		fn = multUint64
		
		zero = types.GoType{ uint64(1) }
		
	
	case float32:
		fn = multFloat32
		
		zero = types.GoType{ float32(1) }
		
	
	case float64:
		fn = multFloat64
		
		zero = types.GoType{ float64(1) }
		
	
	case complex64:
		fn = multComplex64
		
		zero = types.GoType{ complex64(1) }
		
	
	case complex128:
		fn = multComplex128
		
		zero = types.GoType{ complex128(1) }
		
	
	
	default:
		panic(fmt.Sprintf("$#v cannot have Mult called on it", first))
	}

	return mathReduce(fn, zero, s)
}



func divInt(a, b types.Elem) types.Elem {
	return types.GoType{ Int(a) / Int(b) }
}

func divInt8(a, b types.Elem) types.Elem {
	return types.GoType{ Int8(a) / Int8(b) }
}

func divInt16(a, b types.Elem) types.Elem {
	return types.GoType{ Int16(a) / Int16(b) }
}

func divInt32(a, b types.Elem) types.Elem {
	return types.GoType{ Int32(a) / Int32(b) }
}

func divInt64(a, b types.Elem) types.Elem {
	return types.GoType{ Int64(a) / Int64(b) }
}

func divUint(a, b types.Elem) types.Elem {
	return types.GoType{ Uint(a) / Uint(b) }
}

func divUint8(a, b types.Elem) types.Elem {
	return types.GoType{ Uint8(a) / Uint8(b) }
}

func divUint16(a, b types.Elem) types.Elem {
	return types.GoType{ Uint16(a) / Uint16(b) }
}

func divUint32(a, b types.Elem) types.Elem {
	return types.GoType{ Uint32(a) / Uint32(b) }
}

func divUint64(a, b types.Elem) types.Elem {
	return types.GoType{ Uint64(a) / Uint64(b) }
}

func divFloat32(a, b types.Elem) types.Elem {
	return types.GoType{ Float32(a) / Float32(b) }
}

func divFloat64(a, b types.Elem) types.Elem {
	return types.GoType{ Float64(a) / Float64(b) }
}

func divComplex64(a, b types.Elem) types.Elem {
	return types.GoType{ Complex64(a) / Complex64(b) }
}

func divComplex128(a, b types.Elem) types.Elem {
	return types.GoType{ Complex128(a) / Complex128(b) }
}


func Div(s seq.Seq) types.Elem {
	var first, zero types.Elem
	
	if seq.Empty(s) {
		panic("Div cannot be called with no arguments")
	}
	zero, s, _ = s.FirstRest()
	first = zero
	

	var fn mathReduceFn
	switch first.(types.GoType).V.(type) {
	
	case int:
		fn = divInt
		
	
	case int8:
		fn = divInt8
		
	
	case int16:
		fn = divInt16
		
	
	case int32:
		fn = divInt32
		
	
	case int64:
		fn = divInt64
		
	
	case uint:
		fn = divUint
		
	
	case uint8:
		fn = divUint8
		
	
	case uint16:
		fn = divUint16
		
	
	case uint32:
		fn = divUint32
		
	
	case uint64:
		fn = divUint64
		
	
	case float32:
		fn = divFloat32
		
	
	case float64:
		fn = divFloat64
		
	
	case complex64:
		fn = divComplex64
		
	
	case complex128:
		fn = divComplex128
		
	
	
	default:
		panic(fmt.Sprintf("$#v cannot have Div called on it", first))
	}

	return mathReduce(fn, zero, s)
}



func modInt(a, b types.Elem) types.Elem {
	return types.GoType{ Int(a) % Int(b) }
}

func modInt8(a, b types.Elem) types.Elem {
	return types.GoType{ Int8(a) % Int8(b) }
}

func modInt16(a, b types.Elem) types.Elem {
	return types.GoType{ Int16(a) % Int16(b) }
}

func modInt32(a, b types.Elem) types.Elem {
	return types.GoType{ Int32(a) % Int32(b) }
}

func modInt64(a, b types.Elem) types.Elem {
	return types.GoType{ Int64(a) % Int64(b) }
}

func modUint(a, b types.Elem) types.Elem {
	return types.GoType{ Uint(a) % Uint(b) }
}

func modUint8(a, b types.Elem) types.Elem {
	return types.GoType{ Uint8(a) % Uint8(b) }
}

func modUint16(a, b types.Elem) types.Elem {
	return types.GoType{ Uint16(a) % Uint16(b) }
}

func modUint32(a, b types.Elem) types.Elem {
	return types.GoType{ Uint32(a) % Uint32(b) }
}

func modUint64(a, b types.Elem) types.Elem {
	return types.GoType{ Uint64(a) % Uint64(b) }
}


func Mod(s seq.Seq) types.Elem {
	var first, zero types.Elem
	
	if seq.Empty(s) {
		panic("Mod cannot be called with no arguments")
	}
	zero, s, _ = s.FirstRest()
	first = zero
	

	var fn mathReduceFn
	switch first.(types.GoType).V.(type) {
	
	case int:
		fn = modInt
		
	
	case int8:
		fn = modInt8
		
	
	case int16:
		fn = modInt16
		
	
	case int32:
		fn = modInt32
		
	
	case int64:
		fn = modInt64
		
	
	case uint:
		fn = modUint
		
	
	case uint8:
		fn = modUint8
		
	
	case uint16:
		fn = modUint16
		
	
	case uint32:
		fn = modUint32
		
	
	case uint64:
		fn = modUint64
		
	
	
	default:
		panic(fmt.Sprintf("$#v cannot have Mod called on it", first))
	}

	return mathReduce(fn, zero, s)
}