#!/bin/sh
# Start bokftui with a credential fetched from a Bitwarden/Vaultwarden item.
# Runs entirely as the invoking user — no root, no sudo.
#
#   bokftui-bw [item]
#
# The item is chosen from BOKF_BW_ITEM, the first argument, or — when several
# items match "bokf" — an interactive picker. Per item:
#
#   BOKF_BW_FIELD  custom field that holds the secret (default: the password)
#   BOKF_BW_KIND   password (default) exports BOKFD_PASSWORD;
#                  token exports BOKFD_TOKEN
#
# Works with the official Bitwarden CLI (bw) or with rbw. With bw the session
# key is cached in ~/.cache/bokf/bw-session (mode 0600) so the master password
# is only asked when the session expires or after a logout.
set -eu

item="${BOKF_BW_ITEM:-}"
if [ -z "$item" ] && [ "$#" -gt 0 ]; then
    item="$1"
    shift
fi
field="${BOKF_BW_FIELD:-}"
kind="${BOKF_BW_KIND:-password}"
BOKFTUI="${BOKFTUI:-bokftui}"

choose_item() {
    # $1: newline-separated item names
    names="$1"
    n=$(printf '%s\n' "$names" | grep -c .)
    if [ "$n" -eq 0 ]; then
        echo "bokftui-bw: no matching item" >&2
        exit 1
    fi
    if [ "$n" -eq 1 ]; then
        printf '%s\n' "$names"
        return
    fi
    if [ ! -t 0 ]; then
        echo "bokftui-bw: several items match; pass one as an argument" >&2
        printf '%s\n' "$names" >&2
        exit 1
    fi
    echo "Välj konto:" >&2
    i=1
    printf '%s\n' "$names" | while IFS= read -r name; do
        printf '  %d) %s\n' "$i" "$name" >&2
        i=$((i + 1))
    done
    printf 'Nummer: ' >&2
    read -r ans
    printf '%s\n' "$names" | sed -n "${ans}p"
}

if command -v rbw >/dev/null 2>&1; then
    if ! rbw unlocked >/dev/null 2>&1; then
        rbw unlock
    fi
    if [ -z "$item" ]; then
        item=$(choose_item "$(rbw list 2>/dev/null | grep -i 'bokf' || true)")
    fi
    if [ -n "$field" ]; then
        secret=$(rbw get --field "$field" "$item")
    else
        secret=$(rbw get "$item")
    fi
elif command -v bw >/dev/null 2>&1; then
    umask 077
    cache="${XDG_CACHE_HOME:-$HOME/.cache}/bokf/bw-session"
    if [ -f "$cache" ]; then
        BW_SESSION=$(cat "$cache")
        export BW_SESSION
    fi
    if ! bw status 2>/dev/null | jq -e '.status == "unlocked"' >/dev/null 2>&1
    then
        mkdir -p "$(dirname "$cache")"
        BW_SESSION=$(bw unlock --raw)
        export BW_SESSION
        printf '%s\n' "$BW_SESSION" > "$cache"
    fi
    if [ -z "$item" ]; then
        item=$(choose_item "$(bw list items --search bokf 2>/dev/null |
            jq -r '.[]? | .name' || true)")
    fi
    if [ -n "$field" ]; then
        secret=$(bw get item "$item" | jq -r --arg f "$field" \
            '.fields[]? | select(.name == $f) | .value' | head -n 1)
    else
        secret=$(bw get password "$item")
    fi
else
    echo "bokftui-bw: install rbw or the Bitwarden CLI (bw)" >&2
    exit 1
fi

if [ -z "$secret" ] || [ "$secret" = "null" ]; then
    echo "bokftui-bw: no secret named '$field' in item '$item'" >&2
    exit 1
fi

case "$kind" in
    token)
        BOKFD_TOKEN="$secret"
        export BOKFD_TOKEN
        ;;
    password)
        BOKFD_PASSWORD="$secret"
        export BOKFD_PASSWORD
        ;;
    *)
        echo "bokftui-bw: BOKF_BW_KIND must be password or token" >&2
        exit 1
        ;;
esac

exec "$BOKFTUI" "$@"