#! /usr/bin/env tclsh

package require http 2.7
package require sqlite3

namespace eval ::appfs {
	variable cachedir "/tmp/appfs-cache"
	variable ttl 3600
	variable nttl 60

	proc _hash_sep {hash {seps 4}} {
		for {set idx 0} {$idx < $seps} {incr idx} {
			append retval "[string range $hash [expr {$idx * 2}] [expr {($idx * 2) + 1}]]/"
		}
		append retval "[string range $hash [expr {$idx * 2}] end]"

			}
			::http::reset $token
			$token cleanup
		}

		if {![info exists indexhash_data]} {
			# Cache this result for 60 seconds
			_db eval {INSERT OR REPLACE INTO sites (hostname, lastUpdate, ttl) VALUES ($hostname, $now, $::appfs::nttl);}

			return -code error "Unable to fetch $url"
		}

		set indexhash [lindex [split $indexhash_data ","] 0]

		if {![_isHash $indexhash]} {

		}

		set file [download $hostname $package_sha1]
		set fd [open $file]
		set pkgdata [read $fd]
		close $fd

		_db transaction {
			foreach line [split $pkgdata "\n"] {
				set line [string trim $line]

				if {$line == ""} {
					continue
				}

				set work [split $line ","]

				unset -nocomplain fileInfo
				set fileInfo(type) [lindex $work 0]
				set fileInfo(time) [lindex $work 1]

				set work [lrange $work 2 end]
				switch -- $fileInfo(type) {
					"file" {
						set fileInfo(size) [lindex $work 0]
						set fileInfo(perms) [lindex $work 1]
						set fileInfo(sha1) [lindex $work 2]

						set work [lrange $work 3 end]
					}
					"symlink" {
						set fileInfo(source) [lindex $work 0]
						set work [lrange $work 1 end]
					}
				}

				set fileInfo(name) [join $work ","]
				set fileInfo(name) [split [string trim $fileInfo(name) "/"] "/"]
				set fileInfo(directory) [join [lrange $fileInfo(name) 0 end-1] "/"]
				set fileInfo(name) [lindex $fileInfo(name) end]

				_db eval {INSERT INTO files (package_sha1, type, time, source, size, perms, file_sha1, file_name, file_directory) VALUES ($package_sha1, $fileInfo(type), $fileInfo(time), $fileInfo(source), $fileInfo(size), $fileInfo(perms), $fileInfo(sha1), $fileInfo(name), $fileInfo(directory) );}
				_db eval {UPDATE packages SET haveManifest = 1 WHERE sha1 = $package_sha1;}
			}
		}

		return COMPLETE
	}
}