#!/usr/bin/env bash
# shellcheck disable=SC2034  # variables consumed by lib/common.sh
# mxclaude — launch Claude Code on MiniMax's Anthropic-compatible API.
#
# Uses the official MiniMax Anthropic-compatible endpoint:
#   - China (default): https://api.minimaxi.com/anthropic
#   - International:   https://api.minimax.io/anthropic      (set MINIMAX_BASE_URL)
#
# MiniMax-M3 is a 1M-context flagship model optimized for agentic reasoning,
# tool use, and coding tasks. Requires a Coding Plan (Token Plan) API key.
#
# Reads MINIMAX_API_KEY from the environment first, then falls back to
# ~/.zshrc / ~/.bashrc / ~/.bash_profile / ~/.profile if not already exported.
#
# Quick start (no install needed):
#   chmod +x mxclaude
#   ./mxclaude
#
# Optional — make it globally available:
#   sudo mv mxclaude /usr/local/bin/ && sudo chmod +x /usr/local/bin/mxclaude
#
# Use:
#   mxclaude                  # start on MiniMax-M3 (1M context, flagship)
#   mxclaude fast             # start on MiniMax-M2.5 (cheaper / faster)
#   mxclaude long             # request 1M context window (M3 native support)
#   mxclaude effort max       # set reasoning effort (low|medium|high|xhigh|max)
#   mxclaude update           # git pull latest from this repo
#   mxclaude --help           # any remaining flag is forwarded to claude
#
# Optional env overrides:
#   MINIMAX_MODEL=MiniMax-M3                  # main model
#   MINIMAX_FLASH_MODEL=MiniMax-M2.5          # flash / haiku / subagent tier
#   MINIMAX_BASE_URL=https://.../anthropic    # custom Anthropic-compatible base URL
#   MINIMAX_CTX=1048576                       # max context tokens (defaults to 1M with `long`)
#   MINIMAX_OUTPUT=8000                       # cap output tokens
#   MINIMAX_EFFORT=max                        # CLAUDE_CODE_EFFORT_LEVEL
#
# In-session switch:
#   /model MiniMax-M2.5       # switch to the fast tier
#   /model MiniMax-M3          # switch back to flagship
#
# Get your API key: https://platform.minimaxi.com
#
set -euo pipefail

# Resolve symlink to find the real script directory.
_SELF="$0"
if [ -L "$_SELF" ]; then
  _LINK="$(readlink "$_SELF")"
  case "$_LINK" in
    /*) _SELF="$_LINK" ;;
    *)  _SELF="$(cd "$(dirname "$_SELF")" && pwd)/$_LINK" ;;
  esac
fi
SELF_DIR="$(cd "$(dirname "$_SELF")" && pwd)"
if [ -f "$SELF_DIR/lib/common.sh" ]; then source "$SELF_DIR/lib/common.sh"
elif [ -f "$SELF_DIR/../lib/common.sh" ]; then source "$SELF_DIR/../lib/common.sh"
else echo "mxclaude: cannot find lib/common.sh. Reinstall or cd to repo." >&2; exit 1; fi

check_version "mxclaude" "$@"

PRO_MODEL="${MINIMAX_MODEL:-MiniMax-M3}"
FLASH_MODEL="${MINIMAX_FLASH_MODEL:-MiniMax-M2.5}"

if [ $# -gt 0 ] && [ "$1" = "update" ]; then
  do_update "mxclaude" "MXCLAUDE_HOME"
fi

API_KEY="$(resolve_api_key "MINIMAX_API_KEY")"
if [ -z "$API_KEY" ]; then
  echo "❌ MINIMAX_API_KEY not found." >&2
  echo "   Add one line to ~/.zshrc or ~/.bashrc:" >&2
  echo "     export MINIMAX_API_KEY=your_minimax_api_key" >&2
  echo "   Get your key at: https://platform.minimaxi.com" >&2
  exit 1
fi

BASE_URL="${MINIMAX_BASE_URL:-https://api.minimaxi.com/anthropic}"

LONG_CTX=0
EFFORT="${MINIMAX_EFFORT:-}"

MAIN_MODEL="$PRO_MODEL"
while [ $# -gt 0 ]; do
  case "$1" in
    fast|flash) MAIN_MODEL="$FLASH_MODEL"; shift ;;
    long) LONG_CTX=1; shift ;;
    effort)
      case "${2:-}" in
        low|medium|high|xhigh|max) EFFORT="$2"; shift 2 ;;
        *) echo "mxclaude: invalid effort level '${2:-}'. Use: low medium high xhigh max" >&2; exit 1 ;;
      esac
      ;;
    --) shift; break ;;
    *) break ;;
  esac
done

if [ "$MAIN_MODEL" = "$PRO_MODEL" ]; then
  OTHER_MODEL="$FLASH_MODEL"
  OTHER_DESC="MiniMax M2.5 — fast / cheap tier"
else
  OTHER_MODEL="$PRO_MODEL"
  OTHER_DESC="MiniMax M3 — full reasoning"
fi

export_anthropic_base
export CLAUDE_CODE_SUBAGENT_MODEL="$FLASH_MODEL"
set_custom_model "$OTHER_MODEL" "$MAIN_MODEL" "$OTHER_DESC"

CTX="${MINIMAX_CTX:-}"
OUTPUT_CAP="${MINIMAX_OUTPUT:-}"
apply_context_and_effort

show_banner_and_launch "MiniMax" "$@"