SET NAMES utf8mb4;

-- Model records rather than a single provider block: several protocols have to
-- coexist so operations can switch models without a release.
CREATE TABLE IF NOT EXISTS ai_models (
  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  name VARCHAR(60) NOT NULL,
  protocol VARCHAR(20) NOT NULL DEFAULT 'openai',
  base_url VARCHAR(300) NOT NULL DEFAULT '',
  model_name VARCHAR(120) NOT NULL DEFAULT '',
  api_key_cipher TEXT NOT NULL,
  temperature DECIMAL(3,2) NOT NULL DEFAULT 0.80,
  max_tokens INT UNSIGNED NOT NULL DEFAULT 256,
  timeout_ms INT UNSIGNED NOT NULL DEFAULT 15000,
  status TINYINT UNSIGNED NOT NULL DEFAULT 1,
  is_default TINYINT(1) NOT NULL DEFAULT 0,
  extra_json JSON NULL,
  created_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
  updated_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) ON UPDATE CURRENT_TIMESTAMP(3),
  PRIMARY KEY (id),
  UNIQUE KEY uk_ai_models_name (name),
  KEY idx_ai_models_status (status, is_default)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

-- Every call is recorded for cost accounting and after-the-fact review. The
-- prompt is kept as a digest so conversation content does not accumulate here.
CREATE TABLE IF NOT EXISTS ai_call_logs (
  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  model_id BIGINT UNSIGNED NOT NULL,
  scene VARCHAR(30) NOT NULL DEFAULT 'chat',
  agent_user_id BIGINT UNSIGNED NOT NULL DEFAULT 0,
  conversation_id BIGINT UNSIGNED NOT NULL DEFAULT 0,
  latency_ms INT UNSIGNED NOT NULL DEFAULT 0,
  prompt_tokens INT UNSIGNED NOT NULL DEFAULT 0,
  completion_tokens INT UNSIGNED NOT NULL DEFAULT 0,
  status TINYINT UNSIGNED NOT NULL DEFAULT 1,
  error VARCHAR(500) NOT NULL DEFAULT '',
  prompt_digest VARCHAR(64) NOT NULL DEFAULT '',
  reply_text VARCHAR(1000) NOT NULL DEFAULT '',
  created_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
  PRIMARY KEY (id),
  KEY idx_ai_call_logs_model_created (model_id, created_at),
  KEY idx_ai_call_logs_created (created_at)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

INSERT INTO system_configs (config_key, config_value, value_type, description) VALUES
  ('ai.enabled', 'false', 'boolean', '总开关：关闭后不调用任何模型，测试账号不再自动回复'),
  ('ai.default_model_id', '', 'string', '默认模型 ID，留空则使用模型列表中标记为默认的一条'),
  ('ai.max_concurrency', '4', 'string', '同时进行的模型调用上限'),
  ('ai.daily_call_limit', '2000', 'string', '全局每日调用次数上限，0 表示不限制'),
  ('ai.agent_daily_reply_limit', '50', 'string', '单个托管账号每日回复条数上限，0 表示不限制'),
  ('ai.reply_delay_min_ms', '2000', 'string', '回复前的最小延迟毫秒数，避免秒回失真'),
  ('ai.reply_delay_max_ms', '6000', 'string', '回复前的最大延迟毫秒数'),
  ('ai.allow_batches', '', 'string', '允许托管的测试批次，逗号分隔；留空表示全部测试账号'),
  ('ai.disclose_in_chat', 'true', 'boolean', '会话内标注 AI 身份；关闭前需确认所在地区的监管要求'),
  ('ai.fallback_text', '', 'string', '模型调用失败时发送的兜底文案，留空则静默不回复'),
  ('ai.log_retention_days', '30', 'string', '调用日志保留天数')
ON DUPLICATE KEY UPDATE description = VALUES(description), value_type = VALUES(value_type);