#!/usr/bin/env bash
#
# tooldance — a thin CLI over the tooldance HTTP service.
#
# Latest version and docs: https://tool.dance
#   - CLI:    https://tool.dance/tooldance.sh
#   - Caller: https://tool.dance/caller.AGENTS.md
#
#   tooldance                       show the readme (available tools)
#   tooldance echo '{"my":"json"}'  call a tool with a raw JSON body
#   tooldance greet --name world    call a tool with named params -> JSON
#
# Configure with:
#   TOOLDANCE_HOST   base URL          (optional, default https://tool.dance)
#   TOOLDANCE_KEY    bearer token      (required)
#
set -euo pipefail

die() { echo "tooldance: $*" >&2; exit 1; }

[[ -n "${TOOLDANCE_KEY:-}"  ]] || die "TOOLDANCE_KEY is not set (your bearer token)"

host="${TOOLDANCE_HOST:-https://tool.dance}"
host="${host%/}"
auth=(-H "Authorization: Bearer ${TOOLDANCE_KEY}")

# Build a JSON object from --key value / --key=value / --flag arguments.
params_to_json() {
  command -v jq >/dev/null 2>&1 \
    || die "named params need 'jq' on PATH — or pass a raw JSON body instead"

  local out='{}' key val
  while [[ $# -gt 0 ]]; do
    key="$1"; shift
    [[ "$key" == --?* ]] || die "expected --flag, got: $key"
    key="${key#--}"

    if [[ "$key" == *=* ]]; then
      val="${key#*=}"; key="${key%%=*}"
    elif [[ $# -gt 0 && "$1" != --* ]]; then
      val="$1"; shift
    else
      val="true"                       # bare --flag
    fi

    if printf '%s' "$val" | jq . >/dev/null 2>&1; then
      out=$(jq --arg k "$key" --argjson v "$val" '. + {($k): $v}' <<<"$out")
    else
      out=$(jq --arg k "$key" --arg    v "$val" '. + {($k): $v}' <<<"$out")
    fi
  done
  printf '%s' "$out"
}

# No tool -> show the readme, rendered in CLI flavor by the server.
if [[ $# -eq 0 ]]; then
  curl -fsS "${auth[@]}" "$host/readme?format=cli" || die "failed to fetch readme from $host"
  echo
  exit 0
fi

tool="$1"; shift

if [[ $# -eq 0 ]]; then
  body='{}'
elif [[ $# -eq 1 && "$1" != --* ]]; then
  body="$1"                            # raw JSON body
else
  body="$(params_to_json "$@")"        # named params -> JSON
fi

curl -fsS -X POST "${auth[@]}" \
  -H "Content-Type: application/json" \
  -d "$body" \
  "$host/$tool"
echo