#!/usr/bin/wish -f
# -*- Tcl -*-

# usage:
#  xbatmon-simple-tray
#    [WISH-OPTIONS... [-- TRAY-EMBED-OPTIONS... [-- XBATMON-SIMPLE-OPTIONS...]]]

source subproc.tcl
source utils.tcl
source args.tcl

proc cmdline {id orientation} {
    global argv
    return [concat [list xacpi-simple -into $id] $argv]
}

#----- tooltip generation -----

proc tt-invisible {} {
    tt-noafter
    applet::tooltip-set {}
}

proc tt-noafter {} {
    global ttafter
    catch { after cancel $ttafter }
    catch { unset ttafter }
}

proc tt-show {} {
    global ttafter
    tt-noafter
    set ttafter [after 500 tt-show]
    applet::tooltip-set [tt-string]
}

proc append-energies {av energy power eunit punit fmt} {
    upvar 1 o o
    upvar 1 $av a
    append o [format "  ${fmt}%s / ${fmt}%s / ${fmt}%s  ${fmt}%s" \
		  [expr { $a(${energy}_NOW)         * 1e-6 }]  $eunit  \
		  [expr { $a(${energy}_FULL)        * 1e-6 }]  $eunit  \
		  [expr { $a(${energy}_FULL_DESIGN) * 1e-6 }]  $eunit  \
		  [expr { $a(${power}_NOW)          * 1e-6 }]  $punit]
}

proc append-percents {qv} {
    upvar 1 o o
    upvar 1 $qv q
    append o [format "  %.0f%% (%.0f%%/%.0f%%)" \
                  [expr { $q(energy_NOW)  * 100.0 / $q(energy_FULL_DESIGN) }] \
                  [expr { $q(energy_NOW)  * 100.0 / $q(energy_FULL)        }] \
                  [expr { $q(energy_FULL) * 100.0 / $q(energy_FULL_DESIGN) }]]
    if {$q(power_NOW) < -1} {
	set endpoint 0
    } elseif {$q(power_NOW) > -1} {
	set endpoint $q(energy_FULL)
    }
    if {[info exists endpoint]} {
	set until [expr {($endpoint - $q(energy_NOW)) * 60.0/ $q(power_NOW)}]
	if {$until < 72*60} {
	    append o [format "  %.fmins" $until]
	}
    }
}

proc tt-string {} {
    global errorInfo
    set lines {}
    if {[catch {
	set dir /sys/class/power_supply
	foreach f [glob -nocomplain -tails -directory $dir *] {
	    debug::debug "TT-INFO $f"
	    if {[catch { 
		set chan [open $dir/$f/uevent]
		tt-info $chan
	    } info]} {
		set info "error: $info"
		debug::debug "$f $errorInfo"
	    }
	    lappend lines "$f: $info"
	    catch { close $chan }
	    catch { unset chan }
	}
    } emsg]} {
	lappend lines "error scanning: $emsg"
	debug::debug "scanning $errorInfo"
    }
    if {$nbatts} {
	set o "Total: $nbatts present  "
	append o [join [lsort [array names states]] /]
	append-energies tot energy power Wh W %.1f
	append-percents tot
	lappend lines $o
    }
    if {![llength $lines]} {
	lappend lines "no power information"
    }
    return [join $lines "\n"]
}

proc compute {power energy factor punit eunit sign fmt} {
    upvar 1 a a
    upvar 1 q q
    upvar 1 tot tot
    upvar 1 o o
    debug::debug "COMPUTE $power $energy $factor"
    set energy_sign 1
    set power_sign $sign
    set entl {{energy NOW} {energy FULL} {energy FULL_DESIGN} {power NOW}}
    foreach ent $entl {
	manyset $ent pe k
	set kq "${pe}_${k}"
	set kv "[set $pe]_$k"
	if {![info exists a($kv)]} { return 0 }
	set a($kv) [expr {$a($kv) * [set "${pe}_sign"]}]
	set q($kq) [expr {$a($kv) * $factor}]
    }
    debug::debug "COMPUTE OK [array names q]"
    foreach ent $entl {
	manyset $ent pe k
	set kq "${pe}_${k}"
	if {![info exists tot($kq)]} { set tot($kq) 0 }
	set tot($kq) [expr {$tot($kq) + $q($kq)}]
    }
    append-energies a $energy $power $eunit $punit $fmt
    append-percents q
    return 1
}

proc tt-info {chan} {
    upvar 1 tot tot
    upvar 1 nbatts nbatts
    upvar 1 states states
    while {[gets $chan l] >= 0} {
	if {[regexp {^POWER_SUPPLY_([A-Z0-9_]+)=(.*)$} $l dummy k v]} {
	    debug::debug "  uevent ok  $l"
	    set a($k) $v
	} else {
	    debug::debug "  uevent unk $l"
	}
    }
    debug::debug "GOT [array names a]"
    if {![info exists a(TYPE)]} {
	set op {}
	foreach k {ONLINE PRESENT} { append op [info exists a($k)] }
	switch -exact $op {
	    10 { set a(TYPE) Mains }
	    01 { set a(TYPE) Battery }
	    default { error "no type and bad op $op" }
	}
	debug::debug "  guessed type $a(TYPE) from ONLINE PRESENT $op"
    }
    set o "$a(TYPE)"

    set nbatts 0
    switch -exact -- $a(TYPE) {
	Mains {
	    switch -exact -- $a(ONLINE) {
		0 { append o " Offline" }
		1 { append o " Online" }
		default { append o " ?$o" }
	    }
	}
	Battery {
	    switch -exact -- $a(PRESENT) {
		0 { append o " Absent"; return $o }
		1 { append o " Present" }
		default { apend o " ?$o" }
	    }
	    set sign 1
	    append o " "
	    switch -exact -- $a(STATUS) {
		Charging { }
		Discharging { set sign -1 }
		default { append o "Status=" }
	    }
	    set states($a(STATUS)) 1
	    append o $a(STATUS)
	    foreach power {POWER CURRENT} energy {ENERGY CHARGE} \
		    punit {W A} eunit {Wh Ah} fmt {%.1f %.2f} {
		switch -exact $power {
		    POWER { set factor 1.0 }
		    CURRENT { set factor [expr {$a(VOLTAGE_NOW) * 1e-6}] }
		}
		if {![compute $power $energy $factor \
                              $punit $eunit $sign $fmt]} continue
		incr nbatts
	    }
	}
    }
    return $o
}

#----- modes -----

proc mode/normal {} {
    uplevel #0 source applet.tcl
    applet::setup-subproc cmdline
    applet::setup-tooltip tt-show tt-invisible
}

proc mode/-tooltip-string {} {
    puts [tt-string]
    exit 0
}

#----- command line parsing -----

set mode normal

while {[args::next_special arg]} {
    switch -exact -- $arg {
	-- { break }
	-tooltip-string { set mode $arg }
	default { args::badoption }
    }
}

mode/$mode