local Y=require("yaru.core")
local gfx=require("yaru.gfx")
local ui=require("yaru.ui")
local T=require("yaru.theme")
local computer=require("computer")
local component=require("component")
local fs=require("filesystem")
local unicode=require("unicode")

local M={}
local PAGES={
{"appearance","◐ Appearance"},{"display","▭ Displays"},{"sound","♪ Sound"},
{"notifications","• Notifications"},{"power","ϟ Power"},{"privacy","◉ Privacy & Login"},
{"datetime","◷ Date & Time"},{"keyboard","⌨ Keyboard"},{"about","ℹ About"},
}

local function save()Y.saveConfig()end

local function row(w,x,y,width,label,sub)
local t=Y.theme
ui.round(x,y,width,sub and 2 or 1,t.card)
gfx.text(x+1,y,ui.trunc(label,width-12),t.fg,t.card)
if sub then gfx.text(x+1,y+1,ui.trunc(sub,width-12),t.dim,t.card)end
end

local function fitResolution()
local gpu=Y.gpu
local mw,mh=gpu.maxResolution()
local ok,aw,ah=pcall(component.invoke,gpu.getScreen(),"getAspectRatio")
if not ok or not aw then return mw,mh end
local ratio=(aw*2-0.5)/(ah-0.25)
local w,h
if mw/mh>ratio then h=mh;w=math.floor(mh*ratio+.5)else w=mw;h=math.floor(mw/ratio+.5)end
return math.max(50,math.min(mw,w)),math.max(16,math.min(mh,h))
end

local pages={}

function pages.appearance(w,x,y,pw)
local t=Y.theme
gfx.text(x,y,"Style",t.fg);y=y+1
for i,v in ipairs({{"Default",false},{"Dark",true}})do
local bx=x+(i-1)*21
local sel=Y.cfg.dark==v[2]
ui.round(bx,y,19,5,sel and t.accent or t.sep)
local pb=v[2]and 0x242424 or 0xFAFAFA
ui.round(bx+1,y,17,4,pb)
ui.round(bx+4,y+1,11,3,v[2]and 0x383838 or 0xFFFFFF)
gfx.fill(bx+4,y+1,11,1,v[2]and 0x303030 or 0xEBEBEB)
ui.pill(bx+11,y+1,3,Y.theme.accent)
gfx.text(bx+(19-#v[1])//2,y+4,v[1],sel and 0xFFFFFF or t.fg,sel and t.accent or t.sep)
ui.hit(w,bx,y,19,5,function()Y.cfg.dark=v[2];save();Y.applyTheme()end)
end
y=y+7
gfx.text(x,y,"Color",t.fg);y=y+1
for i,a in ipairs(T.accents)do
local bx=x+(i-1)*5
local sel=Y.cfg.accent==a[1]
ui.pill(bx,y,3,a[2])
if sel then gfx.text(bx+1,y,"✓",0xFFFFFF,a[2])end
ui.hit(w,bx,y,3,1,function()Y.cfg.accent=a[1];save();Y.applyTheme()end)
end
gfx.text(x,y+1,"Accent: "..Y.cfg.accent,t.dim)
y=y+3
gfx.text(x,y,"Background",t.fg);y=y+1
local wall=require("yaru.wall")
for i,id in ipairs(wall.order)do
local d=wall.designs[id]
local col,rw=(i-1)%4,(i-1)//4
local bx,by=x+col*17,y+rw*5
local sel=Y.cfg.wallpaper==id
if sel then ui.pill(bx-1,by+3,17,t.accent)end
local ramp=d.ramp
for k=0,14 do
local c1=ramp[math.min(#ramp,1+k*#ramp//15)]
local c2=ramp[math.min(#ramp,1+(k+3)*#ramp//15)]
gfx.fill(bx+k,by,1,1,c1,c2,"▄")
gfx.fill(bx+k,by+1,1,1,c2,ramp[math.min(#ramp,1+(k+6)*#ramp//15)],"▄")
gfx.fill(bx+k,by+2,1,1,ramp[math.min(#ramp,1+(k+6)*#ramp//15)],ramp[math.min(#ramp,1+(k+9)*#ramp//15)],"▄")
end
local label=(sel and"✓ "or"")..d.name
gfx.text(bx+(15-unicode.len(label))//2,by+3,label,sel and 0xFFFFFF or t.dim,sel and t.accent or nil)
ui.hit(w,bx,by,15,4,function()Y.cfg.wallpaper=id;save();Y.applyTheme()end)
end
y=y+11
local pic=type(Y.cfg.wallpaper)=="string"and Y.cfg.wallpaper:sub(1,1)=="/"
ui.button(w,x,y-1,pic and("Picture: "..require("filesystem").name(Y.cfg.wallpaper))or"Picture…",function()
Y.dialog{title="Picture Background",text="Path to a .pic image (e.g. /home/Pictures/Road.pic)",entry=pic and Y.cfg.wallpaper or"/home/Pictures/",
buttons={{"Cancel"},{"Set",function(p)if p and p~=""then Y.cfg.wallpaper=p;save();Y.applyTheme()end end,"suggested"}}}
end,pic and"suggested"or nil)
y=y+2
row(w,x,y,pw,"Desktop icons","Show Home and drives on the desktop")
ui.switch(w,x+pw-6,y,Y.cfg.desktopIcons,function()Y.cfg.desktopIcons=not Y.cfg.desktopIcons;save();Y.redraw()end)
y=y+3
row(w,x,y,pw,"Dock: click to minimize","Clicking a focused app's icon minimizes it")
ui.switch(w,x+pw-6,y,Y.cfg.dockClickMinimize,function()Y.cfg.dockClickMinimize=not Y.cfg.dockClickMinimize;save()end)
end

function pages.display(w,x,y,pw)
local t=Y.theme
local gpu=Y.gpu
local cw,ch=gpu.getResolution()
local mw,mh=gpu.maxResolution()
local fw,fh=fitResolution()
gfx.text(x,y,"Built-in Display",t.fg)
gfx.text(x,y+1,string.format("Current %dx%d  •  maximum %dx%d  •  colour depth %d bit",cw,ch,mw,mh,gpu.getDepth()),t.dim)
y=y+3
gfx.text(x,y,"Resolution",t.fg);y=y+1
local opts={{fw,fh,"Fit to screen (no borders)"},{mw,mh,"Maximum"}}
for _,r in ipairs({{120,40},{100,32},{80,25}})do
if r[1]<=mw and r[2]<=mh then opts[#opts+1]={r[1],r[2],""}end
end
for _,o in ipairs(opts)do
local on=o[1]==cw and o[2]==ch
ui.radio(w,x,y,on,string.format("%dx%d  %s",o[1],o[2],o[3]),function()
if o[1]<50 or o[2]<16 then return Y.notify("Displays","The desktop needs at least 50x16")end
Y.cfg.resolution={o[1],o[2]};save()
Y.setResolution(o[1],o[2])
end)
y=y+1
end
y=y+1
ui.button(w,x,y,"Reset to Default",function()Y.cfg.resolution=nil;save();Y.setResolution(mw,mh)end)
y=y+2
gfx.text(x,y,"Lower resolutions redraw faster: fewer cells per frame.",t.dim)
gfx.text(x,y+1,"Tier 3 GPU + tier 3 screen recommended (160x50, 256 colours).",t.dim)
y=y+3
local frame=Y.stats.lastFrameMs
gfx.text(x,y,string.format("Last frame: %.1f ms Lua, %d GPU runs",frame or 0,Y.stats.lastRuns or 0),t.dim)
end

function pages.sound(w,x,y,pw)
local t=Y.theme
row(w,x,y,pw,"System sounds","Beeps for notifications and errors (computer speaker)")
ui.switch(w,x+pw-6,y,Y.cfg.beeps,function()Y.cfg.beeps=not Y.cfg.beeps;save()end)
y=y+3
ui.button(w,x,y,"Test Sound",function()computer.beep(880,0.1);computer.beep(1320,0.1)end)
y=y+2
local nb=component.isAvailable("note_block")or component.isAvailable("iron_noteblock")
local sound=component.isAvailable("sound")
gfx.text(x,y,"Output devices",t.fg);y=y+1
gfx.text(x,y,"• Computer speaker (beep)",t.dim);y=y+1
if nb then gfx.text(x,y,"• Note block / iron note block",t.dim);y=y+1 end
if sound then gfx.text(x,y,"• Sound card",t.dim);y=y+1 end
end

function pages.notifications(w,x,y,pw)
local t=Y.theme
row(w,x,y,pw,"Do Not Disturb","Only urgent notifications show banners")
ui.switch(w,x+pw-6,y,Y.cfg.dnd,function()Y.cfg.dnd=not Y.cfg.dnd;save();Y.redraw()end)
y=y+3
ui.button(w,x,y,"Send Test Notification",function()Y.notify("Test notification","Hello from Settings")end)
ui.button(w,x+26,y,"Clear History ("..#Y.notifs..")",function()Y.notifs={};Y.unread=false;Y.redraw()end)
y=y+2
gfx.text(x,y,"From a shell or program:  notify-send \"Title\" \"Body\"",t.dim)
gfx.text(x,y+1,"or  computer.pushSignal(\"yaru_notify\", title, body)",t.dim)
end

function pages.power(w,x,y,pw)
local t=Y.theme
local e,me=computer.energy(),computer.maxEnergy()
gfx.text(x,y,"Energy",t.fg)
gfx.text(x,y+1,string.format("%.0f / %.0f  (%d%%)",e,me,me>0 and math.floor(e*100/me)or 0),t.dim)
gfx.fill(x,y+2,pw,1,t.sep)
if me>0 then gfx.fill(x,y+2,math.floor(pw*e/me),1,t.success)end
y=y+4
gfx.text(x,y,"Screen Blank (locks the session)",t.fg);y=y+1
for i,m in ipairs({0,1,5,10,15})do
ui.radio(w,x+(i-1)*12,y,(Y.cfg.blank or 0)==m,m==0 and"Never"or(m.." min"),function()Y.cfg.blank=m;save()end)
end
y=y+2
gfx.text(x,y,"Power saving (always on):",t.fg);y=y+1
for _,s in ipairs({"• the desktop sleeps in event.pull until input, a timer, or the next clock minute",
"• only changed screen cells are sent to the GPU; unfocused terminals stop blinking",
"• app code is unloaded when its last window closes; shell popups are loaded on demand"})do
gfx.text(x,y,ui.trunc(s,pw),t.dim);y=y+1
end
y=y+1
ui.button(w,x,y,"Restart…",function()Y.lazy("quick").powerDialog()end)
end

function pages.privacy(w,x,y,pw)
local t=Y.theme
row(w,x,y,pw,"Start desktop at boot","Hold any key during boot for the text shell")
ui.switch(w,x+pw-6,y,Y.cfg.autostart,function()Y.cfg.autostart=not Y.cfg.autostart;save()end)
y=y+3
row(w,x,y,pw,"Automatic login","Skip the login screen when no password is set")
ui.switch(w,x+pw-6,y,Y.cfg.autologin,function()Y.cfg.autologin=not Y.cfg.autologin;save()end)
y=y+3
row(w,x,y,pw,"Password",Y.cfg.password and"Set (SHA-256, salted)"or"Not set: anyone can unlock")
y=y+3
ui.button(w,x,y,Y.cfg.password and"Change Password…"or"Set Password…",function()
Y.dialog{title="New Password",entry="",mask=true,buttons={{"Cancel"},{"Save",function(pw1)
if not pw1 or pw1==""then return end
Y.dialog{title="Confirm Password",entry="",mask=true,buttons={{"Cancel"},{"Save",function(pw2)
if pw1~=pw2 then return Y.notify("Password","Passwords do not match")end
Y.cfg.password=require("yaru.sha256").make(pw1);save()
Y.notify("Password","Password set")
end,"suggested"}}}
end,"suggested"}}}
end,"suggested")
if Y.cfg.password then
ui.button(w,x+22,y,"Remove Password",function()Y.cfg.password=nil;save()end,"destructive")
end
y=y+2
ui.button(w,x,y,"Lock Screen  (Super+L)",function()Y.lazy("lock").open(Y.cfg.password~=nil)end)
y=y+2
gfx.text(x,y,"Note: anyone with physical access can boot another disk; the password protects",t.dim)
gfx.text(x,y+1,"an unattended session, not the data on the drive.",t.dim)
end

function pages.datetime(w,x,y,pw)
local t=Y.theme
gfx.text(x,y,Y.date("%A, %B %d %Y   %H:%M:%S"),t.fg)
y=y+2
row(w,x,y,pw,"Real-world time","Use the host's clock (via file timestamps) instead of Minecraft time")
ui.switch(w,x+pw-6,y,Y.cfg.clockReal,function()Y.cfg.clockReal=not Y.cfg.clockReal;save();Y.redraw()end)
y=y+3
row(w,x,y,pw,"Time zone",string.format("UTC%+g",Y.cfg.tz or 0))
ui.button(w,x+pw-12,y,"−",function()Y.cfg.tz=math.max(-12,(Y.cfg.tz or 0)-0.5);save();Y.redraw()end,nil,4)
ui.button(w,x+pw-7,y,"+",function()Y.cfg.tz=math.min(14,(Y.cfg.tz or 0)+0.5);save();Y.redraw()end,nil,4)
y=y+3
row(w,x,y,pw,"Weekday in top bar")
ui.switch(w,x+pw-6,y,Y.cfg.clockWeekday,function()Y.cfg.clockWeekday=not Y.cfg.clockWeekday;save();Y.redraw()end)
y=y+2
row(w,x,y,pw,"Seconds in top bar","Wakes the desktop every second")
ui.switch(w,x+pw-6,y,Y.cfg.clockSeconds,function()Y.cfg.clockSeconds=not Y.cfg.clockSeconds;save();Y.redraw()end)
end

local SHORTCUTS={
{"Super","Activities overview"},{"Super+A","Show applications"},{"Alt+F2","Run a command"},
{"Alt+Tab / Super+Tab / Ctrl+Tab","Switch windows"},{"Alt+F4","Close window"},{"Alt+F10 / Super+↑","Maximize"},
{"Super+← / →","Tile left / right"},{"Super+↓ / Super+H","Restore / minimize"},{"Super+D / Ctrl+Alt+D","Show desktop"},
{"Ctrl+Alt+← / →, Super+PgUp/PgDn","Switch workspace (+Shift: move window)"},{"Ctrl+Alt+T / Super+T","Terminal"},
{"Super+E","Home folder"},{"Super+V","Notifications & calendar"},{"Super+S","Quick settings"},
{"Super+L","Lock screen"},{"Ctrl+Alt+Del","Log out / power off"},{"Print Screen","Screenshot (text) to ~/Pictures"},
{"Ctrl+Shift+V / Ctrl+Shift+T","Terminal: paste / new window"},
}
function pages.keyboard(w,x,y,pw,ph)
local t=Y.theme
gfx.text(x,y,"Keyboard Shortcuts",t.fg)
gfx.text(x,y+1,"Tip: the host OS may take Alt+Tab or Super; use Ctrl+Tab / Ctrl+Alt instead.",t.dim)
y=y+3
for i,s in ipairs(SHORTCUTS)do
if y>=ph then break end
gfx.fill(x,y,pw,1,i%2==0 and t.bg or t.card)
gfx.text(x+1,y,ui.trunc(s[2],pw//2-2),t.fg)
gfx.text(x+pw//2,y,ui.trunc(s[1],pw-pw//2-1),t.dim)
y=y+1
end
end

function pages.about(w,x,y,pw)
local t=Y.theme
local logo={"  ▄▄▄  "," █ ○ █ ","  ▀▀▀  "}
for i,l in ipairs(logo)do gfx.text(x+(pw-7)//2,y+i-1,l,t.accent)end
y=y+4
local host=os.getenv("HOSTNAME")or"openos"
local lines={}
local function add(k,v)lines[#lines+1]={k,v}end
add("Device Name",host)
add("OS",(_OSVERSION or"OpenOS").." + Yaru desktop")
add("Architecture",computer.getArchitecture and computer.getArchitecture()or"Lua")
local tot,free=computer.totalMemory(),computer.freeMemory()
add("Memory",string.format("%s total, %s free",ui.size(tot),ui.size(free)))
local gpu=Y.gpu
local mw,mh=gpu.maxResolution()
add("Graphics",string.format("GPU tier %d (%dx%d, %d-bit)",mw>=160 and 3 or mw>=80 and 2 or 1,mw,mh,gpu.getDepth()))
local root=fs.get("/")
if root then add("Disk",string.format("%s of %s used%s",ui.size(root.spaceUsed()),ui.size(root.spaceTotal()),root.isReadOnly()and" (read-only)"or""))end
local n=0
for _ in component.list()do n=n+1 end
add("Components",tostring(n))
add("Uptime",string.format("%d min",computer.uptime()//60))
add("Address",computer.address():sub(1,13).."…")
for _,l in ipairs(lines)do
gfx.fill(x,y,pw,1,t.card)
gfx.text(x+1,y,l[1],t.fg,t.card)
gfx.text(x+pw-1-unicode.len(l[2]),y,ui.trunc(l[2],pw-16),t.dim,t.card)
y=y+1
end
y=y+1
ui.button(w,x,y,"Rename Device…",function()
Y.dialog{title="Rename Device",entry=host,buttons={{"Cancel"},{"Rename",function(txt)
if not txt or txt==""or txt:find("[%s/]")then return end
local f=io.open("/etc/hostname","w")if f then f:write(txt);f:close()end
os.setenv("HOSTNAME",txt)
Y.notify("Device renamed","New terminals will show "..txt)
end,"suggested"}}}
end)
ui.button(w,x+18,y,"System Monitor",function()Y.launch("monitor")end)
end

function M.open(page)
local existing=Y.windowsOf("settings")[1]
local st
if existing then
st=existing.state
if page then st.page=page end
Y.focusWin(existing)
return existing
end
st={page=page or"appearance"}
local win=Y.newWindow{app="settings",title="Settings",w=100,h=36,minW=70,minH=18,state=st}
local SIDE=22
function win.draw(w,cw,ch)
local t=Y.theme
gfx.fill(1,1,SIDE,ch,t.sidebar)
for i,p in ipairs(PAGES)do
local sel=st.page==p[1]
local yy=i*2
if sel then ui.select(2,yy,SIDE-2,t.dark and 0x454545 or 0xDEDDDA)end
gfx.text(4,yy,p[2],t.fg)
ui.hit(w,1,yy,SIDE,1,function()st.page=p[1]end)
end
local x=SIDE+3
local pw=math.min(cw-SIDE-4,72)
for _,p in ipairs(PAGES)do if p[1]==st.page then w.title=p[2]:gsub("^%S+ ","")end end
w.tickInterval=(st.page=="datetime"or st.page=="power")and 1 or nil
local fn=pages[st.page]or pages.appearance
fn(w,x,2,pw,ch)
end
function win.key(w,char,code)
local K=Y.K
local idx=1
for i,p in ipairs(PAGES)do if p[1]==st.page then idx=i end end
if code==K.down then idx=math.min(#PAGES,idx+1)elseif code==K.up then idx=math.max(1,idx-1)end
st.page=PAGES[idx][1]
end

function win.tick(w)if st.page=="datetime"or st.page=="power"then Y.redraw(w)end end
return win
end

return M