set formattedDate to (do shell script "date +'%Y-%m-%d-%H.%M.%S'")

set zipfolder to choose folder with prompt "Folder containing zipalign and apksigner"
set zipfolderpos to POSIX path of zipfolder

set unsignedapk to choose file with prompt "Location of unsigned apk"
set unsignedapkpos to POSIX path of unsignedapk as text
set zippedpath to text 1 thru -5 of unsignedapkpos
set zippedapk to zippedpath & "_" & formattedDate & "_zipaligned" & ".apk"
set signedapk to zippedpath & "_" & formattedDate & "_signed" & ".apk"

set keystore to choose file with prompt "Location of keystore"
set keystorepos to POSIX path of keystore
set keypassword to text returned of (display dialog "Keystore password:" default answer "" with hidden answer)

do shell script zipfolderpos & "/zipalign -v 4 " & unsignedapkpos & " " & zippedapk
do shell script zipfolderpos & "/apksigner sign --ks " & keystorepos & " --ks-pass pass:" & keypassword & " --in " & zippedapk & " --out " & signedapk

tell application "System Events" to if (exists file zippedapk) then delete file zippedapk


display dialog "All done! Your signed apk can be found at: " & signedapk & "."