62 lines
2 KiB
Go
62 lines
2 KiB
Go
package main
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import (
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"context"
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"fmt"
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"google.golang.org/genai"
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)
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type chatTurn struct {
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Role string `json:"role"` // "user" or "model"
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Text string `json:"text"`
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}
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const (
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modelGemma = "gemma-4-26b-a4b-it"
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modelGemini = "gemini-flash-latest"
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)
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func selectModel(unlockCode, unlockSecret string) string {
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if unlockSecret != "" && unlockCode == unlockSecret {
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return modelGemini
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}
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return modelGemma
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}
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var personaTones = map[string]string{
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"energetic": "テンション高めで元気いっぱい、リアクションが大きい性格。",
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"downer": "気だるげでローテンション、淡々としているが憎めない性格。",
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"goofy": "ひょうきんでボケ気味、ちょっとふざけたことを言う性格。",
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"neutral": "落ち着いていて素直な性格。",
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}
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func buildSystemInstruction(videoTitle, videoDescription, persona string) *genai.Content {
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tone, ok := personaTones[persona]
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if !ok {
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tone = personaTones["neutral"]
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}
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prompt := fmt.Sprintf(
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"あなたはユーザーと一緒に動画を見ている友達です。タメ口で短く、実況や相槌のように反応してください。\n"+
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"性格: %s\n"+
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"今見ている動画:\nタイトル: %s\n概要: %s",
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tone, videoTitle, videoDescription,
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)
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return genai.NewContentFromText(prompt, genai.RoleUser)
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}
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func chatReply(ctx context.Context, client *genai.Client, model, videoTitle, videoDescription, persona string, history []chatTurn, message string) (string, error) {
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contents := make([]*genai.Content, 0, len(history)+1)
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for _, h := range history {
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contents = append(contents, genai.NewContentFromText(h.Text, genai.Role(h.Role)))
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}
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contents = append(contents, genai.NewContentFromText(message, genai.RoleUser))
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resp, err := client.Models.GenerateContent(ctx, model, contents, &genai.GenerateContentConfig{
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SystemInstruction: buildSystemInstruction(videoTitle, videoDescription, persona),
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})
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if err != nil {
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return "", err
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}
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return resp.Text(), nil
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}
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