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#!/bin/bash

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# vim: set ft=sh :

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# Bootstrap

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if [ $0 == './update' ]; then

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    SRV=$(pwd)

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    OPT=./opt

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else

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    SRV=${SRV:-/srv/dns}

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    OPT=${SRV:-/srv/dns/opt}

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    cd $SRV

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fi

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source lib/update

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function commit {

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    ## Commit

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    # pre-commit check

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    log "Testing hosts..."

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    for hosts in $(list_files etc/hosts); do

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        log_warn "TODO: check_hosts $hosts"

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    done

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    # commit, unless noop'd

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    log "Commit..."

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        update_commit       etc

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}

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function update {

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    if hg_modified etc; then

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        serial=$(unix_time)

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        log_warn "Using local unix time for uncommited changes: $serial"

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    else

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        serial=$(hg_time etc)

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        log_update "Using HG commit timestamp: $serial"

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    fi

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    ## Hosts

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    log "Updating forward host zones..."

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    for zone in $(list_dirs etc/hosts/forward); do

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        update_hosts_forward    "var/zones/hosts/forward/$zone"     "$zone" \

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            etc/hosts/forward/$zone/*

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    done

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    log "Updating DHCP hosts..."

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    done

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    log "Updating reverse host zones..."

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    for zone in $(list_dirs etc/hosts/reverse); do

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        update_hosts_reverse    "var/zones/hosts/reverse/$zone"     "$zone" \

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            etc/hosts/reverse/$zone/*

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    done

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    ## Zones

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    log "Copying zone includes..."

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    for zone in $(list_files etc/zones/includes); do

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        copy                "var/zones/includes/$zone"      "etc/zones/includes/$zone"

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    done

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    log "Updating zone serials..."

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    for zone in $(list_files etc/zones); do

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        update_serial       "var/serials/$zone"             $serial \

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            "etc/zones/$zone" $(zone_includes var/include-cache/$zone etc/zones/$zone var/zones/)

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    done

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    log "Updating zones..."

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    for zone in $(list_files etc/zones); do

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        update_zone         "var/zones/$zone"               "etc/zones/$zone"       "var/serials/$zone" \

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            $(zone_includes var/include-cache/$zone etc/zones/$zone var/zones/)

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    done

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    log "Updating DHCP confs..."

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    for conf in $(list_files etc/dhcp); do

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        update_dhcp_conf    "var/dhcp/$conf"                "etc/dhcp/$conf"

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    done

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}

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function deploy {

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    ## Check

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    log "Testing zones..."

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    for zone in $(list_files etc/zones); do

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        check_zone          "var/zones/$zone"       $zone

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    done

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    log "Testing DHCP confs..."

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    for conf in var/dhcp/*.conf; do

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        check_dhcp          $conf

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    done

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    log "Reload zones..."

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        reload_zones

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    log "Reload dhcp..."

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        reload_dhcp

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}

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## Main entry point

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function main {

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    parse_args "$@"

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    ## Input dirs

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    for dir in etc etc/zones etc/hosts opt; do

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        [ -d $dir ] || die "Missing directory: $dir"

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    done

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    ## Output dirs

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    ensure_dir      var

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    for dir in var/dhcp var/zones var/include-cache var/serials; do

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        ensure_dir  $dir

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    done

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    for dir in var/dhcp/hosts; do

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        ensure_dir  $dir

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    done

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    for dir in var/zones/includes var/zones/hosts; do

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        ensure_dir  $dir

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    done

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    for dir in var/zones/hosts/forward var/zones/hosts/reverse; do

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        ensure_dir  $dir

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    done

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    ## Go

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    commit

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    update

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    deploy

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}

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main "$@"