package control

import (
	"context"
	"encoding/json"
	"fmt"
	"log"
	"net/http"
	"time"

	"tianyan-edge/internal/config"
)

type ConfigAgent struct {
	cfg *config.Config
}

func NewConfigAgent(cfg *config.Config) *ConfigAgent {
	return &ConfigAgent{cfg: cfg}
}

func (a *ConfigAgent) Run(ctx context.Context) {
	client := &http.Client{Timeout: 5 * time.Second}
	ticker := time.NewTicker(60 * time.Second)
	defer ticker.Stop()
	for {
		select {
		case <-ctx.Done():
			return
		case <-ticker.C:
			a.pull(client)
		}
	}
}

func (a *ConfigAgent) pull(client *http.Client) {
	url := fmt.Sprintf("%s/api/v1/edge/config?edge_id=%s", a.cfg.CloudURL, a.cfg.EdgeID)
	req, _ := http.NewRequest(http.MethodGet, url, nil)
	req.Header.Set("Authorization", "Bearer "+a.cfg.EdgeToken)
	resp, err := client.Do(req)
	if err != nil {
		log.Printf("config pull: %v", err)
		return
	}
	defer resp.Body.Close()
	if resp.StatusCode != 200 {
		return
	}
	var data map[string]any
	if err := json.NewDecoder(resp.Body).Decode(&data); err != nil {
		return
	}
	if v, ok := data["infer_fps"].(float64); ok && int(v) > 0 {
		a.cfg.InferFPS = int(v)
	}
	if v, ok := data["conf_threshold"].(float64); ok {
		a.cfg.ConfThreshold = v
	}
}