#!/usr/bin/env bash
# Spawnpay installer — one-shot Claude Desktop / Cursor / Cline / Codex / Continue setup.
# Usage:
#   curl -fsSL https://spawnpay.ai/install | bash
# Idempotent: re-running merges with existing config instead of overwriting.

set -eu

C_GREEN=$'\033[32m'
C_RED=$'\033[31m'
C_YELLOW=$'\033[33m'
C_BOLD=$'\033[1m'
C_DIM=$'\033[2m'
C_RESET=$'\033[0m'

say()  { printf "%s\n" "$*"; }
ok()   { printf "%s\xe2\x9c\x93 %s%s\n" "$C_GREEN" "$*" "$C_RESET"; }
warn() { printf "%s! %s%s\n" "$C_YELLOW" "$*" "$C_RESET"; }
err()  { printf "%sx %s%s\n" "$C_RED" "$*" "$C_RESET" 1>&2; }

say "${C_BOLD}Spawnpay — one-line install${C_RESET}"
say "${C_DIM}Adds spawnpay-mcp + 6 free demo MCPs to your agent config.${C_RESET}"
say ""

# --- pre-flight ---
command -v node >/dev/null 2>&1 || { err "node not found. Install Node 18+ from https://nodejs.org and re-run."; exit 1; }
NODE_MAJOR=$(node -p 'process.versions.node.split(".")[0]')
if [ "$NODE_MAJOR" -lt 18 ]; then err "Node 18+ required (have $NODE_MAJOR)."; exit 1; fi
ok "Node $(node -v) detected."

command -v npx >/dev/null 2>&1 || { err "npx not found (comes with npm)."; exit 1; }
ok "npx available."

if ! command -v jq >/dev/null 2>&1; then
  warn "jq not installed — falling back to Node-based JSON merge."
  USE_JQ=0
else
  USE_JQ=1
fi

# --- detect config targets ---
OS_NAME=$(uname -s)

CLAUDE_CFG=""
case "$OS_NAME" in
  Darwin) CLAUDE_CFG="$HOME/Library/Application Support/Claude/claude_desktop_config.json" ;;
  Linux)  CLAUDE_CFG="$HOME/.config/Claude/claude_desktop_config.json" ;;
  MINGW*|MSYS*|CYGWIN*) CLAUDE_CFG="$APPDATA/Claude/claude_desktop_config.json" ;;
esac

CURSOR_CFG="$HOME/.cursor/mcp.json"
CLINE_CFG_DARWIN="$HOME/Library/Application Support/Code/User/globalStorage/saoudrizwan.claude-dev/settings/cline_mcp_settings.json"
CLINE_CFG_LINUX="$HOME/.config/Code/User/globalStorage/saoudrizwan.claude-dev/settings/cline_mcp_settings.json"

TARGETS=()
[ -n "$CLAUDE_CFG" ] && [ -d "$(dirname "$CLAUDE_CFG")" ] && TARGETS+=("claude:$CLAUDE_CFG")
[ -d "$HOME/.cursor" ] && TARGETS+=("cursor:$CURSOR_CFG")
[ -f "$CLINE_CFG_DARWIN" ] && TARGETS+=("cline:$CLINE_CFG_DARWIN")
[ -f "$CLINE_CFG_LINUX" ] && TARGETS+=("cline:$CLINE_CFG_LINUX")

if [ "${#TARGETS[@]}" -eq 0 ]; then
  warn "No agent config detected (Claude Desktop / Cursor / Cline)."
  warn "Spawnpay-mcp will still be runnable via 'npx -y spawnpay-mcp' but no auto-wire-in happened."
  warn "See https://spawnpay.ai/quickstart for manual setup."
  exit 0
fi

say ""
say "Targets to write:"
for t in "${TARGETS[@]}"; do say "  - ${t%%:*}  →  ${t#*:}"; done
say ""

# Skip prompt if STDIN is a pipe (curl ... | bash); otherwise ask.
if [ -t 0 ]; then
  printf "Proceed? [Y/n] "
  read -r REPLY || REPLY="Y"
  case "$REPLY" in [Nn]*) say "Aborted."; exit 0;; esac
fi

# --- the MCP block to merge in ---
SP_BLOCK_FILE=$(mktemp)
cat > "$SP_BLOCK_FILE" <<'JSON'
{
  "mcpServers": {
    "spawnpay": {
      "command": "npx",
      "args": ["-y", "spawnpay-mcp"]
    },
    "translate": {
      "command": "npx",
      "args": ["-y", "https://github.com/Robocular/spawnpay/releases/download/paid-mcps-v0.2.0/paid-translate-mcp-0.1.0.tgz"]
    },
    "weather": {
      "command": "npx",
      "args": ["-y", "https://github.com/Robocular/spawnpay/releases/download/paid-mcps-v0.2.0/paid-weather-mcp-0.1.0.tgz"]
    },
    "currency": {
      "command": "npx",
      "args": ["-y", "https://github.com/Robocular/spawnpay/releases/download/paid-mcps-v0.2.0/paid-currency-mcp-0.1.0.tgz"]
    },
    "research": {
      "command": "npx",
      "args": ["-y", "https://github.com/Robocular/spawnpay/releases/download/paid-mcps-v0.5.0/paid-research-mcp-0.1.0.tgz"]
    },
    "scrape": {
      "command": "npx",
      "args": ["-y", "https://github.com/Robocular/spawnpay/releases/download/paid-mcps-v0.2.0/paid-cloud-scrape-mcp-0.2.0.tgz"]
    },
    "screenshot": {
      "command": "npx",
      "args": ["-y", "https://github.com/Robocular/spawnpay/releases/download/paid-mcps-v0.2.0/paid-screenshot-mcp-0.2.0.tgz"]
    }
  }
}
JSON

merge_json() {
  local target="$1"
  local block="$2"
  mkdir -p "$(dirname "$target")"
  if [ ! -f "$target" ] || ! grep -q '{' "$target" 2>/dev/null; then
    cp "$block" "$target"
    ok "Wrote fresh config: $target"
    return
  fi
  # Back up.
  cp "$target" "$target.spawnpay-backup.$(date +%s)"
  if [ "$USE_JQ" -eq 1 ]; then
    jq -s '.[0] * .[1]' "$target" "$block" > "$target.tmp" && mv "$target.tmp" "$target"
  else
    node -e "
      const fs = require('fs');
      const cur = JSON.parse(fs.readFileSync('$target', 'utf8'));
      const add = JSON.parse(fs.readFileSync('$block', 'utf8'));
      cur.mcpServers = Object.assign({}, cur.mcpServers || {}, add.mcpServers);
      fs.writeFileSync('$target', JSON.stringify(cur, null, 2));
    "
  fi
  ok "Merged into: $target"
}

for t in "${TARGETS[@]}"; do
  case "${t%%:*}" in
    claude|cursor|cline) merge_json "${t#*:}" "$SP_BLOCK_FILE" ;;
  esac
done

rm -f "$SP_BLOCK_FILE"

say ""
ok "Done."
say ""
say "${C_BOLD}Next:${C_RESET}"
say "  1. Restart your agent (Claude Desktop / Cursor / Cline)."
say "  2. Ask it to call a tool. For example:"
say "       ${C_DIM}\"Use the translate tool to say 'hello' in French.\"${C_RESET}"
say "  3. First call auto-creates a Spawnpay wallet with \$7 USDC free credit."
say ""
say "Learn more:  https://spawnpay.ai/quickstart"
say "Pricing:     https://spawnpay.ai/pricing"
say "Top up:      https://spawnpay.ai/deposit"