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//version=5
indicator("Auto Anchored Moving Average", "Anchored MA", overlay = true, max_bars_back = 5000, max_lines_count = 500)

// Inputs
auto = input.bool(true, "Enable Auto Anchor")
anchor = input.timeframe('D', 'Anchor Period')
source = input(hlc3, "Source")

showPP = input.bool(true, "Show Prev. Period MA")
highlightAnc = input.bool(true, "Highlight Anchor Change")

wma_show = input.bool(true, "WMA", inline = "WMA", group = "Styles")
sma_show = input.bool(true, "SMA", inline = "SMA", group = "Styles")
vwap_show = input.bool(true, "VWAP", inline = "VWAP", group = "Styles")
wma_style = input.string("──────", "", options = ["──────", "─ ─ ─ ─", "· · · · ·"], inline = "WMA", group = "Styles")
sma_style = input.string("──────", "", options = ["──────", "─ ─ ─ ─", "· · · · ·"], inline = "SMA", group = "Styles")
vwap_style = input.string("──────", "", options = ["──────", "─ ─ ─ ─", "· · · · ·"], inline = "VWAP", group = "Styles")
wma_color = input.color(color.lime, "WMA Color", inline = "WMA", group = "Styles")
sma_color = input.color(color.red, "SMA Color", inline = "SMA", group = "Styles")
vwap_color = input.color(color.blue, "VWAP Color", inline = "VWAP", group = "Styles")

// Determine anchor period automatically
autoAnchor = switch
timeframe.isintraday => timeframe.multiplier <= 15 ? "1D" : "1W"
timeframe.isdaily => "1M"
=> "12M"

// Override auto-anchor if 'auto' is off
if auto
anchor := autoAnchor

// Anchor change detection
isNewAnchor = timeframe.change(anchor)

var length = 1
length := isNewAnchor ? 1 : length + 1

// Calculate MAs
wma = ta.wma(source, length)
sma = ta.sma(source, length)
vwap = nz(ta.vwma(source, length))

// Previous MAs (for prev period plot)
p_wma = ta.valuewhen(isNewAnchor, wma[1], 0)
p_sma = ta.valuewhen(isNewAnchor, sma[1], 0)
p_vwap = ta.valuewhen(isNewAnchor, vwap[1], 0)

// Plot styles
get_style(style) =>
switch style
"──────" => line.style_solid
"─ ─ ─ ─" => line.style_dashed
"· · · · ·" => line.style_dotted

// Draw moving averages
draw(show, ma, _c, style) =>
var line _l = na
var label _lb = na
var label _lbc = na

_l.set_x2(bar_index)
if show and isNewAnchor and showPP
_l := line.new(bar_index - 1, ma[1], bar_index, ma[1], color = _c, style = style)

show = not isNewAnchor

plot(show and wma_show ? wma : na, "WMA", wma_color, style=plot.style_linebr)
plot(show and sma_show ? sma : na, "SMA", sma_color, style=plot.style_linebr)
plot(show and vwap_show ? vwap : na, "VWAP", vwap_color, style=plot.style_linebr)

// Highlight anchor change
hlight = isNewAnchor and highlightAnc
plotshape(hlight and wma_show ? wma[1] : na, 'WMA Highlight', shape.circle, location.absolute, color.new(wma_color, 50), -1)
plotshape(hlight and sma_show ? sma[1] : na, 'SMA Highlight', shape.circle, location.absolute, color.new(sma_color, 50), -1)
plotshape(hlight and vwap_show ? vwap[1] : na, 'VWAP Highlight', shape.circle, location.absolute, color.new(vwap_color, 50), -1)

// Draw lines for each moving average
draw(wma_show, wma, wma_color, get_style(wma_style))
draw(sma_show, sma, sma_color, get_style(sma_style))
draw(vwap_show, vwap, vwap_color, get_style(vwap_style))