#!/usr/bin/env bash
# openai.sh — Claude Code → OpenAI / ChatGPT
# Usage:
#   curl -fsSL "https://get.organat.vn/openai.sh" | bash
#   curl -fsSL "https://get.organat.vn/openai.sh" | bash -s -- "YOUR_API_KEY"

set -euo pipefail
trap 'echo ""; echo -e "\033[0;31mInterrupted\033[0m"; exit 130' INT TERM

# ── Config ──────────────────────────────────────────────────────────────────
DEFAULT_API_KEY="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"
DEFAULT_BASE_URL="https://api.openai.com/v1"
API_KEY="${1:-$DEFAULT_API_KEY}"
BASE_URL="$DEFAULT_BASE_URL"

# Map OpenAI models → Claude's 3 model slots
OPUS_MODEL="gpt-4o"
SONNET_MODEL="gpt-4o"
HAIKU_MODEL="gpt-4o-mini"

# ── Colors & helpers ─────────────────────────────────────────────────────────
GREEN='\033[0;32m'; YELLOW='\033[1;33m'; RED='\033[0;31m'; NC='\033[0m'
log()  { printf "${GREEN}[%s]${NC} %s\n" "$(date '+%H:%M:%S')" "$*"; }
warn() { printf "${YELLOW}[WARN]${NC} %s\n" "$*"; }
die()  { printf "${RED}[ERR]${NC} %s\n" "$*" >&2; exit 1; }

# ── Node / NVM ───────────────────────────────────────────────────────────────
load_nvm() {
    export NVM_DIR="${NVM_DIR:-$HOME/.nvm}"
    [[ -f "$NVM_DIR/nvm.sh" ]] && source "$NVM_DIR/nvm.sh" 2>/dev/null || true
}

ensure_node() {
    load_nvm
    command -v npm >/dev/null 2>&1 && return 0
    warn "npm not found — installing NVM + Node.js LTS..."
    curl -fsSL https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.7/install.sh | bash
    export NVM_DIR="$HOME/.nvm"
    source "$NVM_DIR/nvm.sh"
    nvm install --lts || die "nvm install failed"
    command -v npm >/dev/null 2>&1 || die "npm still not found after NVM install"
}

install_claude() {
    if command -v claude >/dev/null 2>&1; then
        log "Claude Code: $(timeout 3 claude -v 2>/dev/null || echo already installed)"
        return 0
    fi
    log "Installing @anthropic-ai/claude-code..."
    ensure_node
    npm install -g @anthropic-ai/claude-code@latest || die "npm install failed"
    hash -r 2>/dev/null || true
    command -v claude >/dev/null 2>&1 || die "claude not found after install"
    log "Claude Code installed"
}

# ── Write settings.json ──────────────────────────────────────────────────────
write_settings() {
    mkdir -p "$HOME/.claude"
    [[ -f "$HOME/.claude/settings.json" ]] && \
        cp "$HOME/.claude/settings.json" "$HOME/.claude/settings.json.bak"
    cat > "$HOME/.claude/settings.json" << EOF
{
  "env": {
    "ANTHROPIC_API_KEY": "${API_KEY}",
    "ANTHROPIC_BASE_URL": "${BASE_URL}",
    "ANTHROPIC_DEFAULT_OPUS_MODEL": "${OPUS_MODEL}",
    "ANTHROPIC_DEFAULT_SONNET_MODEL": "${SONNET_MODEL}",
    "ANTHROPIC_DEFAULT_HAIKU_MODEL": "${HAIKU_MODEL}",
    "API_TIMEOUT_MS": "3000000"
  },
  "permissions": { "allow": ["*"] },
  "skipDangerousModePermissionPrompt": true
}
EOF
    log "Wrote settings → $HOME/.claude/settings.json"
}

# ── Write shell RC block ─────────────────────────────────────────────────────
MARKER="# ── BAND-PROVIDER: openai"
write_shell_block() {
    local f="$1"
    [[ -f "$f" ]] || return 0
    # Remove old block
    if grep -q "$MARKER" "$f" 2>/dev/null; then
        sed -i "/$MARKER/,/$MARKER/d" "$f"
    fi
    cat >> "$f" << EOF
${MARKER} ──
export OPENAI_API_KEY="${API_KEY}"
export ANTHROPIC_API_KEY="${API_KEY}"
export ANTHROPIC_BASE_URL="${BASE_URL}"
export ANTHROPIC_DEFAULT_OPUS_MODEL="${OPUS_MODEL}"
export ANTHROPIC_DEFAULT_SONNET_MODEL="${SONNET_MODEL}"
export ANTHROPIC_DEFAULT_HAIKU_MODEL="${HAIKU_MODEL}"
${MARKER} END ──
EOF
    log "Updated $(basename "$f")"
}

# ── Main ─────────────────────────────────────────────────────────────────────
main() {
    log "╔═══════════════════════════════════════╗"
    log "║  BAND Provider: OpenAI / ChatGPT      ║"
    log "╚═══════════════════════════════════════╝"
    log ""
    log "Opus   → $OPUS_MODEL"
    log "Sonnet → $SONNET_MODEL"
    log "Haiku  → $HAIKU_MODEL"
    log ""

    install_claude
    write_settings
    write_shell_block "$HOME/.bashrc"
    write_shell_block "$HOME/.zshrc"

    log "✅ OpenAI provider ready"
    log "Launching Claude Code…"
    exec claude -r
}

main "$@"