#!/bin/bash -eu
set -o pipefail

main() {
    initialize-environment-vars
    assert-file-privileges || report-errors-and-exit
    ensure-owner-file
    ensure-config-file
    show-configs
    exec-wiki
}

initialize-environment-vars() {
    ERRORS=''
    readonly OWNER_FILE=/home/app/.wiki/$DOMAIN.owner.json
    readonly CONFIG_FILE=/home/app/.wiki/config.json
}

assert-file-privileges() {
    [ -w /home/app/.wiki ] \
      || ERRORS="app cannot write to /home/app/.wiki\n${ERRORS}"

    [ ${#ERRORS} == 0 ]
}

report-errors-and-exit() {
    echo -e $ERRORS
    echo "exiting."
    exit 1
}

ensure-owner-file() {
    if [ ! -r "$OWNER_FILE" ]; then
      jq -n --arg name "$OWNER_NAME" --arg secret $(random-string) \
         '.name = $name | .friend.secret = $secret' > $OWNER_FILE
    fi
}

ensure-config-file() {
    if [ ! -r "$CONFIG_FILE" ]; then
      > $CONFIG_FILE \
      jq -n -M \
        --arg admin $(jq -r .friend.secret $OWNER_FILE) \
        --arg random $(random-string) \
        --arg cookie $COOKIE \
        --arg domain $DOMAIN \
        --arg owner $OWNER_FILE \
        '
.admin = $admin
| .autoseed = true
| .farm = true
| .cookieSecret = $random
| .secure_cookie = ("secure" == $cookie)
| .security_type = "friends"
| .wikiDomains[$domain].id = "/home/app/.wiki/\($domain).owner.json"
'

    fi
}

random-string() {
    node -e 'console.log(require("crypto").randomBytes(64).toString("hex"))'
}

show-configs() {
    set -x
    ls -l $OWNER_FILE $CONFIG_FILE
    cat $OWNER_FILE
    cat $CONFIG_FILE
    set +x
}

exec-wiki() {
    exec wiki
}

main