#!/usr/bin/env bats
# Seam: Authentik (SSO / OIDC provider) — the homelab's auth layer.
#
# Authentik is a 3-service stack (PostgreSQL + server + worker) on dankclaw.
# It protects the vhosts that have no application-level authentication
# (SearXNG, Hermes, Prometheus, RomM, Copyparty, the homepage) with its
# embedded proxy outpost.
#
# The Caddyfile carries an `auth.franksdank.cloud` vhost for the admin UI, and
# an internal `:8016` listener that Anubis dials after verifying a client.
# :8016 proxies every request whole to the Authentik server with the Host
# header preserved; the embedded outpost routes on the ORIGINAL Host against
# each proxy provider's external_host (meta headers do NOT route it —
# disproved live, 2026-08-29) and forwards authenticated traffic back to the
# post-auth listener `:8017`.
#
# See ../docs/Infrastructure/Authentik.md.

load helpers

COMPOSE="$REPO_ROOT/dankclaw/compose.yaml"
CADDYFILE="$REPO_ROOT/dankclaw/Caddyfile"
ENV_EXAMPLE="$REPO_ROOT/dankclaw/.env.example"

# --- Quadlet units: the 3-service stack ------------------------------------
# The trio left compose: they are boot-persistent Quadlet units installed to
# ~/.config/containers/systemd/ by deploy-remote.sh (deploy_authentik).

UNIT_DIR="$REPO_ROOT/dankclaw/authentik/quadlet"

@test "the three authentik quadlet units exist" {
    for unit in authentik-postgres authentik-server authentik-worker; do
        [ -f "$UNIT_DIR/$unit.container" ]
    done
}

@test "authentik-postgres uses the official postgres image" {
    grep -q 'Image=docker.io/library/postgres:16-alpine' "$UNIT_DIR/authentik-postgres.container"
}

@test "server and worker use the official goauthentik image" {
    grep -q 'Image=ghcr.io/goauthentik/server:' "$UNIT_DIR/authentik-server.container"
    grep -q 'Image=ghcr.io/goauthentik/server:' "$UNIT_DIR/authentik-worker.container"
}

@test "the same image runs both roles; the Exec command selects the role" {
    grep -qE '^Exec=server$' "$UNIT_DIR/authentik-server.container"
    grep -qE '^Exec=worker$' "$UNIT_DIR/authentik-worker.container"
}

@test "startup order is postgres -> server -> worker via unit ordering" {
    grep -q 'After=network.target authentik-postgres.service' "$UNIT_DIR/authentik-server.container"
    grep -q 'Wants=authentik-postgres.service' "$UNIT_DIR/authentik-server.container"
    grep -q 'Wants=authentik-server.service' "$UNIT_DIR/authentik-worker.container"
}

@test "the server publishes 9000 on loopback only; LAN reaches it through Caddy" {
    grep -q 'PublishPort=127.0.0.1:9000:9000' "$UNIT_DIR/authentik-server.container"
}

@test "authentik-postgres healthcheck uses pg_isready" {
    grep -q 'HealthCmd=.*pg_isready' "$UNIT_DIR/authentik-postgres.container"
}

# --- Units: environment (secrets stay in the host .env, expanded at start) --

@test "the units consume AUTHENTIK_PG_PASS via systemd expansion, not literals" {
    grep -q 'POSTGRES_PASSWORD=${AUTHENTIK_PG_PASS}' "$UNIT_DIR/authentik-postgres.container"
    grep -q 'PASSWORD=${AUTHENTIK_PG_PASS}' "$UNIT_DIR/authentik-server.container"
    grep -q 'PASSWORD=${AUTHENTIK_PG_PASS}' "$UNIT_DIR/authentik-worker.container"
}

@test "the units consume AUTHENTIK_SECRET_KEY via systemd expansion, not literals" {
    for unit in authentik-server authentik-worker; do
        grep -q 'AUTHENTIK_SECRET_KEY=${AUTHENTIK_SECRET_KEY}' "$UNIT_DIR/$unit.container"
    done
}

@test "no secret material is committed in the quadlet units" {
    ! grep -rqE 'SECRET_KEY=[^$]' "$UNIT_DIR"
}

@test "deploy-remote.sh routes the authentik trio to the quadlet handler, not compose up" {
    grep -q 'authentik-postgres|authentik-server|authentik-worker)' "$REPO_ROOT/scripts/deploy-remote.sh"
    grep -q 'deploy_authentik()' "$REPO_ROOT/scripts/deploy-remote.sh"
    ! grep -qE '^[[:space:]]+comfyui\|.*authentik' "$REPO_ROOT/scripts/deploy-remote.sh"
}

# --- Caddyfile: the auth vhost ---

@test "the Caddyfile has an auth.franksdank.cloud vhost" {
    grep -qE '^auth\.franksdank\.cloud[[:space:]]*\{' "$CADDYFILE"
}

@test "the auth vhost proxies to authentik-server:9000" {
    local block
    block=$(awk '/^auth\.franksdank\.cloud/,/^}/' "$CADDYFILE")
    echo "$block" | grep -q 'reverse_proxy authentik-server:9000'
}

# --- Caddyfile: guarded vhosts proxy the whole request through Authentik ----

@test "guarded vhosts proxy the whole request through authentik on the internal listener" {
    awk '/^http:\/\/:8016/,/^\}/' "$CADDYFILE" | grep -q 'reverse_proxy authentik-server:9000'
}

@test "the internal listener preserves Host and never emits cross-host next=" {
    # The outpost routes on the original Host: no header_up Host override...
    ! grep -q 'header_up Host' "$CADDYFILE"
    # ...and the rejected design (absolute cross-host next= into the flow UI)
    # must never return — it produces "Invalid next URL" at flow completion.
    ! grep -qE 'if/flow/[^ ]*next=https' "$CADDYFILE"
}

@test "authenticated traffic returns to Caddy on the post-auth listener" {
    grep -qE '^http://:8017 \{' "$CADDYFILE"
}

# --- Homepage: www holds the homepage; naked redirects onto it ---

@test "the homepage vhost is www, guarded by Anubis" {
    local block
    block=$(awk '/^www\.franksdank\.cloud[[:space:]]*\{/,/^}/' "$CADDYFILE")
    echo "$block" | grep -q 'reverse_proxy anubis:8923'
}

@test "the naked domain redirects to www at the TLS edge" {
    local block
    block=$(awk '/^franksdank\.cloud[[:space:]]*\{/,/^}/' "$CADDYFILE")
    echo "$block" | grep -q 'redir https://www.franksdank.cloud/ 308'
}

@test "dankclaw.franksdank.cloud redirects straight onto www" {
    local block
    block=$(awk '/^dankclaw\.franksdank\.cloud/,/^}/' "$CADDYFILE")
    echo "$block" | grep -q 'redir https://www.franksdank.cloud/ 308'
}

@test "dankserver.franksdank.cloud redirects straight onto www" {
    local block
    block=$(awk '/^dankserver\.franksdank\.cloud/,/^}/' "$CADDYFILE")
    echo "$block" | grep -q 'redir https://www.franksdank.cloud/ 308'
}

@test "the bare-IP catch-all redirects onto www" {
    local block
    block=$(awk '/^:80 \{/,/^}/' "$CADDYFILE")
    echo "$block" | grep -q 'redir https://www.franksdank.cloud/ 308'
}

# --- .env.example: authentik placeholders ---

@test ".env.example carries AUTHENTIK_PG_PASS" {
    grep -q 'AUTHENTIK_PG_PASS=' "$ENV_EXAMPLE"
}

@test ".env.example carries AUTHENTIK_SECRET_KEY" {
    grep -q 'AUTHENTIK_SECRET_KEY=' "$ENV_EXAMPLE"
}

@test ".env.example authentik placeholders are not real secrets" {
    # Placeholders must be obvious (REPLACE_WITH or empty), not 64-char strings.
    local pg sk
    pg=$(grep '^AUTHENTIK_PG_PASS=' "$ENV_EXAMPLE" | cut -d= -f2-)
    sk=$(grep '^AUTHENTIK_SECRET_KEY=' "$ENV_EXAMPLE" | cut -d= -f2-)
    [ ${#pg} -lt 32 ] || { echo "AUTHENTIK_PG_PASS looks like a real secret (len=${#pg})"; return 1; }
    [ ${#sk} -lt 32 ] || { echo "AUTHENTIK_SECRET_KEY looks like a real secret (len=${#sk})"; return 1; }
}