98 lines
2.8 KiB
Go
98 lines
2.8 KiB
Go
package ai
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import (
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"fmt"
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"strings"
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)
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type ChatReq struct {
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Action string `json:"action"`
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Prompt string `json:"prompt"`
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SQL string `json:"sql"`
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Driver string `json:"driver"`
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Database string `json:"database"`
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Error string `json:"error"`
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}
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type ChatRes struct {
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Content string `json:"content"`
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SQL string `json:"sql,omitempty"`
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}
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func Chat(req ChatReq) ChatRes {
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driver := req.Driver
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if driver == "" {
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driver = "mysql"
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}
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db := req.Database
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if db == "" {
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db = "your_db"
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}
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sql := strings.TrimSpace(req.SQL)
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prompt := strings.TrimSpace(req.Prompt)
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switch strings.ToLower(req.Action) {
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case "generate", "ask":
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q := prompt
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if q == "" {
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q = "示例查询"
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}
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gen := fmt.Sprintf("-- 根据描述生成（%s / %s）\n-- 需求: %s\nSELECT *\nFROM `%s`.some_table\nWHERE 1=1\nLIMIT 100;", driver, db, q, db)
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return ChatRes{
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Content: fmt.Sprintf("已根据「%s」生成 SQL（stub，可替换为真实模型）。\n\n```sql\n%s\n```", q, gen),
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SQL: gen,
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}
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case "explain":
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if sql == "" {
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sql = "SELECT 1"
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}
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return ChatRes{Content: fmt.Sprintf("## 解释 SQL\n\n```sql\n%s\n```\n\n- 这是一条在 **%s** 上执行的查询。\n- 建议检查 WHERE 条件是否走索引，避免 `SELECT *` 拉取过大结果集。\n- （stub 回复）", sql, driver)}
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case "optimize":
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opt := sql
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if opt == "" {
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opt = "SELECT id, name FROM users WHERE status = 1 LIMIT 100;"
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} else if strings.Contains(strings.ToUpper(opt), "SELECT *") {
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opt = strings.Replace(opt, "*", "id /* TODO: 显式列 */", 1)
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}
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opt = strings.TrimSpace(opt)
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if !strings.Contains(strings.ToUpper(opt), "LIMIT") {
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opt = opt + "\nLIMIT 100;"
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}
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return ChatRes{
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Content: fmt.Sprintf("## 优化建议\n\n1. 避免不必要的全表扫描\n2. 显式列出列名\n3. 加合理 LIMIT\n\n```sql\n%s\n```", opt),
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SQL: opt,
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}
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case "fix":
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fixed := sql
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if fixed == "" {
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fixed = "SELECT 1 AS ok;"
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}
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msg := req.Error
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if msg == "" {
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msg = "未知错误"
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}
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return ChatRes{
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Content: fmt.Sprintf("## 修复错误\n\n原错误：`%s`\n\n尝试修正后的 SQL：\n\n```sql\n%s\n```\n\n（stub：请结合真实报错继续调整）", msg, fixed),
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SQL: fixed,
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}
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case "dialect":
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out := sql
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if out == "" {
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out = "SELECT * FROM dual"
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}
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out = strings.ReplaceAll(out, "`", "\"")
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return ChatRes{
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Content: fmt.Sprintf("## 方言转换 → PostgreSQL 风格（示例）\n\n```sql\n%s\n```", out),
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SQL: out,
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}
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case "sample":
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sample := fmt.Sprintf("SELECT id, name, created_at\nFROM `%s`.users\nORDER BY id DESC\nLIMIT 20;", db)
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return ChatRes{
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Content: fmt.Sprintf("## 样例 SQL（%s）\n\n```sql\n%s\n```", driver, sample),
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SQL: sample,
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}
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default:
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return ChatRes{Content: "未知 AI 动作。可用：ask / generate / explain / optimize / fix / dialect / sample"}
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}
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}
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