package aoc

import (
	"errors"
	"fmt"
	"math"
)

type CoordByteMap struct {
	Field map[Coordinate]byte

	// The Top-Left-most X/Y
	TLX, TLY int
	// The Bottom-Right-most X/Y
	BRX, BRY int

	// Options for the 'String' method
	StringEmptyIsSpace bool
	StringEmptyByte    byte

	// If 'Repeats' is true, then any coordinate request will be
	// modded by BRX/BRY
	Repeats bool
}

func NewCoordByteMap() CoordByteMap {
	return CoordByteMap{
		Field:           make(map[Coordinate]byte),
		TLX:             math.MaxInt,
		TLY:             math.MaxInt,
		BRX:             math.MinInt,
		BRY:             math.MinInt,
		StringEmptyByte: ' ',
	}
}

func (m *CoordByteMap) Copy() *CoordByteMap {
	c := CoordByteMap{
		Field:           make(map[Coordinate]byte),
		TLX:             m.TLX,
		TLY:             m.TLY,
		BRX:             m.BRX,
		BRY:             m.BRY,
		StringEmptyByte: m.StringEmptyByte,
	}
	for i := range m.Field {
		c.Field[i] = m.Field[i]
	}
	return &c
}

func StringSliceToCoordByteMap(input []string) CoordByteMap {
	ret := CoordByteMap{
		Field: make(map[Coordinate]byte),
	}
	for y := range input {
		for x := range input[y] {
			ret.Put(Coordinate{X: x, Y: y}, input[y][x])
		}
	}
	return ret
}

func (m *CoordByteMap) RowCount() int {
	return m.BRY - m.TLY
}

func (m *CoordByteMap) ColCount() int {
	return m.BRX - m.TLX
}

func (m *CoordByteMap) GetRow(y int) []byte {
	if m.Repeats {
		y = (y + m.BRY) % m.BRY
	}
	var resp []byte
	for x := m.TLX; x <= m.BRX; x++ {
		resp = append(resp, m.Get(Coordinate{X: x, Y: y}))
	}
	return resp
}

func (m *CoordByteMap) GetCol(x int) []byte {
	if m.Repeats {
		x = (x + m.BRX) % m.BRX
	}
	var resp []byte
	for y := m.TLY; y <= m.BRY; y++ {
		resp = append(resp, m.Get(Coordinate{X: x, Y: y}))
	}
	return resp
}

func (m *CoordByteMap) AddRow(row []byte) {
	y := m.BRY + 1
	for x := 0; x < len(row); x++ {
		m.Put(Coordinate{X: x + m.TLX, Y: y}, row[x])
	}
}

func (m *CoordByteMap) AddCol(col []byte) {
	x := m.BRX + 1
	for y := 0; y < len(col); y++ {
		m.Put(Coordinate{X: x, Y: y + m.TLY}, col[y])
	}
}

func (m *CoordByteMap) GetPos(x, y int) byte {
	if m.Repeats {
		x = (x + m.BRX) % m.BRX
		y = (y + m.BRY) % m.BRY
	}
	return m.Get(Coordinate{X: x, Y: y})
}

func (m *CoordByteMap) Get(pos Coordinate) byte {
	if m.Repeats {
		pos.X = (pos.X + m.BRX) % m.BRX
		pos.Y = (pos.Y + m.BRY) % m.BRY
	}
	if v, ok := m.Field[pos]; ok {
		return v
	}
	return 0
}

func (m *CoordByteMap) Opt(pos Coordinate, def byte) byte {
	if m.Repeats {
		pos.X = (pos.X + m.BRX) % m.BRX
		pos.Y = (pos.Y + m.BRY) % m.BRY
	}
	if v, ok := m.Field[pos]; ok {
		return v
	}
	return def
}

func (m *CoordByteMap) Put(pos Coordinate, val byte) {
	if pos.X < m.TLX {
		m.TLX = pos.X
	}
	if pos.Y < m.TLY {
		m.TLY = pos.Y
	}
	if pos.X > m.BRX {
		m.BRX = pos.X
	}
	if pos.Y > m.BRY {
		m.BRY = pos.Y
	}
	m.Field[pos] = val
}

func (m *CoordByteMap) Delete(pos Coordinate) {
	if m.Repeats {
		pos.X = (pos.X + m.BRX) % m.BRX
		pos.Y = (pos.Y + m.BRY) % m.BRY
	}
	delete(m.Field, pos)
}

func (m *CoordByteMap) Height() int {
	return m.BRY - m.TLY
}

func (m *CoordByteMap) Width() int {
	return m.BRX - m.TLX
}

func (m *CoordByteMap) ReplaceAll(o, n byte) {
	for y := m.TLY; y <= m.BRY; y++ {
		for x := m.TLX; x <= m.BRX; x++ {
			c := Coordinate{X: x, Y: y}
			if m.Get(c) == o {
				m.Put(c, n)
			}
		}
	}
}

func (m *CoordByteMap) ToByteSlices() [][]byte {
	var ret [][]byte
	for y := m.TLY; y <= m.BRY; y++ {
		var line []byte
		for x := m.TLX; x <= m.BRX; x++ {
			line = append(line, m.Get(Coordinate{X: x, Y: y}))
		}
		ret = append(ret, line)
	}
	return ret
}

// ContainsCoord returns true if the passed coordinate is within the bounds
// of the map
func (m *CoordByteMap) ContainsCoord(c Coordinate) bool {
	if m.Repeats {
		c.X = (c.X + m.BRX) % m.BRX
		c.Y = (c.Y + m.BRY) % m.BRY
	}
	return c.X >= m.TLX && c.X <= m.BRX &&
		c.Y >= m.TLY && c.Y <= m.BRY
}

// RowContains searches a row for a byte
func (m *CoordByteMap) RowContains(row int, b byte) bool {
	for x := m.TLX; x <= m.BRX; x++ {
		if m.Get(Coordinate{X: x, Y: row}) == b {
			return true
		}
	}
	return false
}

// ColContains searches a column for a byte
func (m *CoordByteMap) ColContains(col int, b byte) bool {
	for y := m.TLY; y <= m.BRY; y++ {
		if m.Get(Coordinate{X: col, Y: y}) == b {
			return true
		}
	}
	return false
}

// InsertRowAfter grows the map south, moves all rows after 'row' south
// Then fills the 'row'th row with 'fill'
func (m *CoordByteMap) InsertRowAfter(row int, fill byte) {
	m.GrowSouth(1, fill)
	for y := m.BRY; y > row; y-- {
		for x := m.TLX; x <= m.BRX; x++ {
			m.Put(Coordinate{X: x, Y: y}, m.Get(Coordinate{X: x, Y: y - 1}))
		}
	}
	for x := m.TLX; x <= m.BRX; x++ {
		m.Put(Coordinate{X: x, Y: row}, fill)
	}
}

// InsertColAfter grows the map East, moves all cols after 'col' east
// Then fills the 'col'th column with 'fill'
func (m *CoordByteMap) InsertColAfter(col int, fill byte) {
	m.GrowEast(1, fill)
	for x := m.BRX; x > col; x-- {
		for y := m.TLY; y <= m.BRY; y++ {
			m.Put(Coordinate{X: x, Y: y}, m.Get(Coordinate{X: x - 1, Y: y}))
		}
	}
	for y := m.TLY; y <= m.BRY; y++ {
		m.Put(Coordinate{X: col, Y: y}, fill)
	}
}

// FindFirst searches left to right, top to bottom for the first
// instance of b.
func (m *CoordByteMap) FindFirst(b byte) (Coordinate, error) {
	for y := m.TLY; y <= m.BRY; y++ {
		for x := m.TLX; x <= m.BRX; x++ {
			c := Coordinate{X: x, Y: y}
			if m.Get(c) == b {
				return c, nil
			}
		}
	}
	return Coordinate{}, errors.New("not found")
}

// FindLast searches right to left, bottom to top for the last
// instance of b
func (m *CoordByteMap) FindLast(b byte) (Coordinate, error) {
	for y := m.BRY; y >= m.TLY; y-- {
		for x := m.BRX; x >= m.TLX; x-- {
			c := Coordinate{X: x, Y: y}
			if m.Get(c) == b {
				return c, nil
			}
		}
	}
	return Coordinate{}, errors.New("not found")
}

func (m *CoordByteMap) FindAll(b ...byte) []Coordinate {
	var ret []Coordinate
	for y := m.TLY; y <= m.BRY; y++ {
		for x := m.TLX; x <= m.BRX; x++ {
			c := Coordinate{X: x, Y: y}
			for i := range b {
				if m.Get(c) == b[i] {
					ret = append(ret, c)
				}
			}
		}
	}
	return ret
}

func (m *CoordByteMap) FindAllNot(b ...byte) map[Coordinate]byte {
	ret := make(map[Coordinate]byte)
	for y := m.TLY; y <= m.BRY; y++ {
		for x := m.TLX; x <= m.BRX; x++ {
			c := Coordinate{X: x, Y: y}
			v := m.Get(c)
			var is bool
			for i := range b {
				if v == b[i] {
					is = true
					break
				}
			}
			if !is {
				ret[c] = v
			}
		}
	}
	return ret
}

// FindAdjacentOrth takes a coordinate and a desired byte, and returns
// all adjacent coordinates that contain that byte
func (m *CoordByteMap) FindAdjacent(st Coordinate, val byte) []Coordinate {
	return m.AnyContain([]Coordinate{st.North(), st.NE(), st.East(), st.SE(), st.South(), st.SW(), st.West(), st.NW()}, val)
}

// FindAdjacentOrth takes a coordinate and a desired byte, and returns
// all adjacent coordinates that contain that byte, Orthogonally
func (m *CoordByteMap) FindAdjacentOrth(st Coordinate, val byte) []Coordinate {
	return m.AnyContain([]Coordinate{st.North(), st.East(), st.South(), st.West()}, val)
}

func (m *CoordByteMap) AnyContain(check []Coordinate, val byte) []Coordinate {
	var ret []Coordinate
	for _, wrk := range check {
		if m.Get(wrk) == val {
			ret = append(ret, wrk)
		}
	}
	return ret
}

// FindAnyAdjacentOrth takes a coordinate and a list of desired bytes, and returns
// all adjacent coordinates that contain those bytes
func (m *CoordByteMap) FindAnyAdjacent(st Coordinate, val []byte) []Coordinate {
	return m.AnyContainAny([]Coordinate{st.North(), st.NE(), st.East(), st.SE(), st.South(), st.SW(), st.West(), st.NW()}, val)
}

// FindAnyAdjacentOrth takes a coordinate and a desired byte, and returns
// all adjacent coordinates that contain that byte, Orthogonally
func (m *CoordByteMap) FindAnyAdjacentOrth(st Coordinate, val []byte) []Coordinate {
	return m.AnyContainAny([]Coordinate{st.North(), st.East(), st.South(), st.West()}, val)
}

func (m *CoordByteMap) AnyContainAny(check []Coordinate, val []byte) []Coordinate {
	var ret []Coordinate
	for _, wrk := range check {
		for _, bt := range val {
			if m.Get(wrk) == bt {
				ret = append(ret, wrk)
			}
		}
	}
	return ret
}

func (m *CoordByteMap) Count(b byte) int {
	var ret int
	for y := m.TLY; y <= m.BRY; y++ {
		for x := m.TLX; x <= m.BRX; x++ {
			if m.Get(Coordinate{X: x, Y: y}) == b {
				ret++
			}
		}
	}
	return ret
}

func (m *CoordByteMap) GrowNorth(size int, val byte) {
	tlY := m.TLY - 1
	for x := m.TLX; x <= m.BRX; x++ {
		m.Put(Coordinate{X: x, Y: tlY}, val)
	}
}

func (m *CoordByteMap) GrowEast(size int, val byte) {
	brX := m.BRX + 1
	for y := m.TLY; y <= m.BRY; y++ {
		m.Put(Coordinate{X: brX, Y: y}, val)
	}
}

func (m *CoordByteMap) GrowSouth(size int, val byte) {
	tlY := m.BRY + 1
	for x := m.TLX; x <= m.BRX; x++ {
		m.Put(Coordinate{X: x, Y: tlY}, val)
	}
}

func (m *CoordByteMap) GrowWest(size int, val byte) {
	brX := m.TLX - 1
	for y := m.TLY; y <= m.BRY; y++ {
		m.Put(Coordinate{X: brX, Y: y}, val)
	}
}

// This grows the map in all directions
func (m *CoordByteMap) Grow(size int, val byte) {
	m.GrowNorth(size, val)
	m.GrowEast(size, val)
	m.GrowSouth(size, val)
	m.GrowWest(size, val)
}

// Runs the passed function on every point in the map
// returning a new bytemap
func (m CoordByteMap) Map(l func(c Coordinate, in byte) byte) CoordByteMap {
	i := m
	for y := m.TLY; y <= m.BRY; y++ {
		for x := m.TLX; x <= m.BRX; x++ {
			c := Coordinate{X: x, Y: y}
			nV := l(c, m.Get(c))
			fmt.Println("MAP: Putting", string(nV), "at", c)
			i.Put(c, l(c, m.Get(c)))
		}
	}
	return i
}

func (m CoordByteMap) RowAsString(y int) string {
	var res string
	for x := m.TLX; x <= m.BRX; x++ {
		res = fmt.Sprintf("%s%s", res, string(m.Get(Coordinate{X: x, Y: y})))
	}
	return res
}

func (m CoordByteMap) ColAsString(x int) string {
	var res string
	for y := m.TLY; y <= m.BRY; y++ {
		res = fmt.Sprintf("%s%s", res, string(m.Get(Coordinate{X: x, Y: y})))
	}
	return res
}

func (m CoordByteMap) String() string {
	var ret string
	for y := m.TLY; y <= m.BRY; y++ {
		for x := m.TLX; x <= m.BRX; x++ {
			if m.StringEmptyIsSpace {
				ret = ret + string(m.Opt(Coordinate{X: x, Y: y}, m.StringEmptyByte))
			} else {
				ret = ret + string(m.Field[Coordinate{X: x, Y: y}])
			}
		}
		ret = ret + "\n"
	}
	return ret
}

// And the 3d Version
type Coord3dByteMap struct {
	Field      map[Coordinate3d]byte
	MinX, MaxX int
	MinY, MaxY int
	MinZ, MaxZ int
}

func StringSliceToCoord3dByteMap(input []string) Coord3dByteMap {
	ret := Coord3dByteMap{
		Field: make(map[Coordinate3d]byte),
	}
	for y := range input {
		for x := range input[y] {
			ret.Put(Coordinate3d{X: x, Y: y, Z: 0}, input[y][x])
		}
	}
	return ret
}

func (m *Coord3dByteMap) Copy() Coord3dByteMap {
	ret := Coord3dByteMap{
		Field: make(map[Coordinate3d]byte),
		MinX:  m.MinX, MaxX: m.MaxX,
		MinY: m.MinY, MaxY: m.MaxY,
		MinZ: m.MinZ, MaxZ: m.MaxZ,
	}
	for z := m.MinZ; z <= m.MaxZ; z++ {
		for y := m.MinY; y <= m.MaxY; y++ {
			for x := m.MinX; x <= m.MaxX; x++ {
				c := Coordinate3d{X: x, Y: y, Z: z}
				ret.Field[c] = m.Get(c)
			}
		}
	}
	return ret
}

func (m *Coord3dByteMap) Get(pos Coordinate3d) byte {
	if _, ok := m.Field[pos]; !ok {
		return 0
	}
	return m.Field[pos]
}

func (m *Coord3dByteMap) Opt(pos Coordinate3d, def byte) byte {
	if v, ok := m.Field[pos]; ok {
		return v
	}
	return def
}

func (m *Coord3dByteMap) Put(pos Coordinate3d, val byte) {
	m.Field[pos] = val
	if pos.X < m.MinX {
		m.MinX = pos.X
	}
	if pos.X > m.MaxX {
		m.MaxX = pos.X
	}
	if pos.Y < m.MinY {
		m.MinY = pos.X
	}
	if pos.Y > m.MaxY {
		m.MaxY = pos.Y
	}
	if pos.Z < m.MinZ {
		m.MinZ = pos.Z
	}
	if pos.Z > m.MaxZ {
		m.MaxZ = pos.Z
	}
}

func (m *Coord3dByteMap) CountNeighbors(pos Coordinate3d, val byte) int {
	var res int
	for z := pos.Z - 1; z <= pos.Z+1; z++ {
		for y := pos.Y - 1; y <= pos.Y+1; y++ {
			for x := pos.X - 1; x <= pos.X+1; x++ {
				if m.Get(Coordinate3d{X: x, Y: y, Z: z}) == val {
					res++
				}
			}
		}
	}
	return res
}

func (m Coord3dByteMap) Count(val byte) int {
	var ret int
	for z := m.MinZ; z <= m.MaxZ; z++ {
		for y := m.MinY; y <= m.MaxY; y++ {
			for x := m.MinX; x <= m.MaxX; x++ {
				if m.Get(Coordinate3d{X: x, Y: y, Z: z}) == val {
					ret++
				}
			}
		}
	}
	return ret
}

func (m Coord3dByteMap) String() string {
	var ret string
	for z := m.MinZ; z <= m.MaxZ; z++ {
		for y := m.MinY; y <= m.MaxY; y++ {
			for x := m.MinX; x <= m.MaxX; x++ {
				ret = ret + string(m.Field[Coordinate3d{X: x, Y: y, Z: z}])
			}
			ret = ret + "\n"
		}
		ret = ret + "\n\n"
	}
	return ret
}