#!/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-or-username]
#
# The item is chosen from BOKF_BW_ITEM, the first argument (matched against
# the item name or the login user name), or — when several items match —
# an interactive picker. Candidates without an argument match
# BOKF_BW_MATCH (default "bokf") the same way.
#
#   BOKF_BW_FIELD  custom field that holds the secret (default: login.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}"

# $1: newline-separated "id<TAB>label" rows; prints the chosen id.
choose_item() {
    rows="$1"
    n=$(printf '%s\n' "$rows" | grep -c . || true)
    if [ "$n" -eq 0 ]; then
        echo "bokftui-bw: no matching item" >&2
        exit 1
    fi
    if [ "$n" -eq 1 ]; then
        printf '%s\n' "$rows" | cut -f1
        return
    fi
    if [ ! -t 0 ]; then
        echo "bokftui-bw: several items match; pass one as an argument" >&2
        printf '%s\n' "$rows" | cut -f2- >&2
        exit 1
    fi
    echo "Välj konto:" >&2
    printf '%s\n' "$rows" | awk -F'\t' '{printf "  %d) %s\n", NR, $2}' >&2
    printf 'Nummer: ' >&2
    read -r ans
    printf '%s\n' "$rows" | awk -F'\t' -v n="$ans" 'NR == n {print $1}'
}

if command -v rbw >/dev/null 2>&1; then
    if ! rbw unlocked >/dev/null 2>&1; then
        rbw unlock
    fi
    rbw sync >/dev/null 2>&1 || true
    if [ -z "$item" ]; then
        item=$(choose_item "$(rbw list 2>/dev/null |
            grep -i "${BOKF_BW_MATCH:-bokf}" |
            awk '{printf "%s\t%s\n", $0, $0}' || true)")
    fi
    if [ -n "$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" > "$cache"
    fi
    bw sync >/dev/null 2>&1 || true
    items=$(bw list items 2>/dev/null || echo '[]')
    if [ -z "$item" ]; then
        rows=$(printf '%s' "$items" | jq -r --arg m "${BOKF_BW_MATCH:-bokf}" '
            .[] | select((.name | test($m; "i")) or
                         ((.login.username // "") | test($m; "i")))
            | "\(.id)\t\(.name) (\(.login.username // "-"))"')
    else
        rows=$(printf '%s' "$items" | jq -r --arg q "$item" '
            ([.[] | select(.id == $q or .name == $q)] as $exact
             | if ($exact | length) > 0 then $exact
               else [.[] | select((.name | test($q; "i")) or
                         ((.login.username // "") | test($q; "i")))]
               end)
            | .[] | "\(.id)\t\(.name) (\(.login.username // "-"))"')
    fi
    id=$(choose_item "$rows")
    if [ -n "$field" ]; then
        secret=$(printf '%s' "$items" | jq -r --arg id "$id" --arg f "$field" \
            '.[] | select(.id == $id) | .fields[]? |
             select(.name == $f) | .value' | head -n 1)
    else
        secret=$(printf '%s' "$items" | jq -r --arg id "$id" \
            '.[] | select(.id == $id) | .login.password')
    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: item has no secret to use" >&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 "$BOKFTUI" "$@"