"""
大模型配置管理 API 路由
支持新增、编辑、删除、切换、测试大模型接口
"""
from flask import Blueprint, jsonify, request
from services.llm_client import llm_client
import logging

logger = logging.getLogger('llm_api')

bp = Blueprint('llm', __name__, url_prefix='/api/llm')


@bp.route('/configs', methods=['GET'])
def get_configs():
    """获取所有大模型配置"""
    try:
        configs = llm_client.get_all_configs()
        # 隐藏完整 api_key，只显示掩码
        for cfg in configs:
            if cfg.get('api_key'):
                key = cfg['api_key']
                if len(key) > 8:
                    cfg['api_key_masked'] = key[:4] + '****' + key[-4:]
                else:
                    cfg['api_key_masked'] = '****'
                cfg['api_key'] = ''
        return jsonify({
            'success': True,
            'configs': configs
        })
    except Exception as e:
        logger.error(f"获取大模型配置失败: {e}")
        return jsonify({'success': False, 'error': str(e)}), 500


@bp.route('/configs/active', methods=['GET'])
def get_active_config():
    """获取当前激活的大模型配置"""
    try:
        config = llm_client.get_active_config()
        return jsonify({
            'success': True,
            'config': config
        })
    except Exception as e:
        logger.error(f"获取激活配置失败: {e}")
        return jsonify({'success': False, 'error': str(e)}), 500


@bp.route('/configs', methods=['POST'])
def add_config():
    """新增大模型配置"""
    try:
        data = request.get_json() or {}
        name = data.get('name', '').strip()
        base_url = data.get('base_url', '').strip().rstrip('/')
        api_key = data.get('api_key', '').strip()
        model_name = data.get('model_name', '').strip()
        max_context = int(data.get('max_context', 262144) or 262144)

        if not name:
            return jsonify({'success': False, 'error': '请填写配置名称'}), 400
        if not base_url:
            return jsonify({'success': False, 'error': '请填写接口地址 base_url'}), 400
        if not model_name:
            return jsonify({'success': False, 'error': '请填写模型名称'}), 400

        config_id = llm_client.add_config(
            name=name,
            base_url=base_url,
            api_key=api_key,
            model_name=model_name,
            max_context=max_context
        )

        return jsonify({
            'success': True,
            'message': f'大模型配置「{name}」已添加',
            'config_id': config_id
        })
    except Exception as e:
        logger.error(f"添加大模型配置失败: {e}")
        return jsonify({'success': False, 'error': str(e)}), 500


@bp.route('/configs/<int:config_id>', methods=['PUT'])
def update_config(config_id):
    """更新大模型配置"""
    try:
        data = request.get_json() or {}
        kwargs = {}
        for key in ['name', 'base_url', 'api_key', 'model_name', 'max_context']:
            if key in data and data[key] is not None:
                kwargs[key] = data[key].strip() if isinstance(data[key], str) else data[key]

        if not kwargs:
            return jsonify({'success': False, 'error': '没有需要更新的字段'}), 400

        # 去掉 base_url 末尾的 /
        if 'base_url' in kwargs:
            kwargs['base_url'] = kwargs['base_url'].rstrip('/')

        llm_client.update_config(config_id, **kwargs)
        return jsonify({
            'success': True,
            'message': '配置已更新'
        })
    except Exception as e:
        logger.error(f"更新大模型配置失败: {e}")
        return jsonify({'success': False, 'error': str(e)}), 500


@bp.route('/configs/<int:config_id>', methods=['DELETE'])
def delete_config(config_id):
    """删除大模型配置"""
    try:
        ok, message = llm_client.delete_config(config_id)
        if ok:
            return jsonify({'success': True, 'message': message})
        return jsonify({'success': False, 'error': message}), 400
    except Exception as e:
        logger.error(f"删除大模型配置失败: {e}")
        return jsonify({'success': False, 'error': str(e)}), 500


@bp.route('/configs/<int:config_id>/activate', methods=['POST'])
def activate_config(config_id):
    """切换激活的大模型配置"""
    try:
        if llm_client.set_active(config_id):
            cfg = llm_client.get_active_config(force=True)
            return jsonify({
                'success': True,
                'message': f'已切换到大模型「{cfg.get("name")}」',
                'config': cfg
            })
        return jsonify({'success': False, 'error': '切换失败，配置不存在'}), 404
    except Exception as e:
        logger.error(f"切换大模型配置失败: {e}")
        return jsonify({'success': False, 'error': str(e)}), 500


@bp.route('/test', methods=['POST'])
def test_connection():
    """测试大模型连接（可指定配置，不指定则测试当前激活配置）"""
    try:
        data = request.get_json() or {}
        config = None
        if data.get('config'):
            config = data['config']

        ok, message = llm_client.test_connection(config)
        return jsonify({
            'success': ok,
            'message': message
        })
    except Exception as e:
        logger.error(f"测试大模型连接失败: {e}")
        return jsonify({'success': False, 'error': str(e)}), 500