#!/usr/bin/env bash
# Provision (or verify) the server-side .env / APP_KEY on the xamxam host.
#
# Behavior:
#   - If remote /var/www/xamxam/.env already contains APP_KEY=... → DO NOT
#     overwrite it. Print a clear message and exit 0.
#   - If the file exists but has no APP_KEY → append a fresh key.
#   - If the file does not exist → create it with a fresh key.
# Always fixes ownership (www-data:xamxam) and perms (640) after any write.
#
# Run from local via: just provision-server
#   (uses the `xamxam` SSH host as defined in ~/.ssh/config / deploy recipes)

set -euo pipefail

HOST="${1:-xamxam}"
ENV_PATH="/var/www/xamxam/.env"

GREEN='\033[0;32m'; YELLOW='\033[1;33m'; CYAN='\033[0;36m'; RED='\033[0;31m'; NC='\033[0m'
ok()   { printf "${GREEN}✓${NC} %s\n" "$*"; }
warn() { printf "${YELLOW}!${NC} %s\n" "$*"; }
info() { printf "${CYAN}→${NC} %s\n" "$*"; }
die()  { printf "${RED}✗${NC} %s\n" "$*" >&2; exit 1; }

info "Checking ${ENV_PATH} on ${HOST}…"

# Does the file exist AND already have an APP_KEY value?
if ssh "$HOST" "test -f '$ENV_PATH' && grep -qE '^\s*APP_KEY=\S+' '$ENV_PATH'"; then
    ok "APP_KEY already present in ${ENV_PATH} on ${HOST} — NOT overwriting it."
    warn "Keeping the existing key so encrypted credentials stay decryptable."
    warn "If you intend to rotate the key, use: just reencrypt-password <new_base64_key>"
    exit 0
fi

info "APP_KEY absent — generating one on the server…"

# Build the new key value once, server-side.
if ssh "$HOST" "command -v php >/dev/null 2>&1"; then
    KEY="$(ssh "$HOST" "php -r 'echo base64_encode(random_bytes(32));'")"
else
    die "php not found on ${HOST} — cannot generate APP_KEY remotely."
fi

# Append or create, always via root (app dir is not writable by www-data).
if ssh "$HOST" "test -f '$ENV_PATH'"; then
    warn "${ENV_PATH} exists but has no APP_KEY — appending (existing lines untouched)."
    ssh "$HOST" "{ printf '\nAPP_KEY=%s\n' '$KEY'; } | sudo tee -a '$ENV_PATH' >/dev/null"
    ok "APP_KEY appended to ${ENV_PATH}."
else
    ssh "$HOST" "echo 'APP_KEY=${KEY}' | sudo tee '$ENV_PATH' >/dev/null"
    info "Created ${ENV_PATH} with a new APP_KEY."
fi

# Normalise ownership + perms regardless of which branch wrote.
ssh "$HOST" "sudo chown www-data:xamxam '$ENV_PATH' && sudo chmod 640 '$ENV_PATH'"
ok "Ownership www-data:xamxam, permissions 640."

ok "Server APP_KEY ready."