package logic

import (
	"bytes"
	"context"
	"encoding/json"
	"git.anthrove.art/Anthrove/gorse-playground/internal/config"
	"git.anthrove.art/Anthrove/gorse-playground/pkg/models"
	"github.com/caarlos0/env/v11"
	"log"
	"net/http"
	"strconv"

	_ "github.com/joho/godotenv/autoload"
)

var gorseConfig config.Gorse

func init() {
	err := env.Parse(&gorseConfig)

	if err != nil {
		log.Panic(err)
	}
}

func UpsertUser(ctx context.Context, user models.GorseUser) error {
	return executeRequest(ctx, http.MethodPost, "/api/user", user)
}

func UpsertItems(ctx context.Context, items []models.GorseItem) error {
	return executeRequest(ctx, http.MethodPost, "/api/items", items)
}

func UpsertFavorites(ctx context.Context, items []models.GorseFavorite) error {
	return executeRequest(ctx, http.MethodPost, "/api/feedback", items)
}

func GetUserFavorites(ctx context.Context, userid string, page int) ([]string, error) {
	client := &http.Client{}
	req, err := http.NewRequest("GET", gorseConfig.Endpoint+"/api/recommend/"+userid, nil)
	if err != nil {
		return nil, err
	}

	q := req.URL.Query()
	q.Set("n", "20")
	q.Set("offset", strconv.Itoa((page-1)*20))
	req.URL.RawQuery = q.Encode()

	req = req.WithContext(ctx)
	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("X-API-Key", gorseConfig.ApiKey)

	resp, err := client.Do(req)
	if err != nil {
		return nil, err
	}

	defer resp.Body.Close()
	var items []string
	err = json.NewDecoder(resp.Body).Decode(&items)

	if err != nil {
		return nil, err
	}

	return items, nil
}

func executeRequest(ctx context.Context, method, url string, data any) error {
	jsonData, err := json.Marshal(data)

	if err != nil {
		return err
	}

	client := &http.Client{}
	req, err := http.NewRequest(method, gorseConfig.Endpoint+url, bytes.NewReader(jsonData))
	if err != nil {
		return err
	}
	req = req.WithContext(ctx)
	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("X-API-Key", gorseConfig.ApiKey)
	_, err = client.Do(req)
	if err != nil {
		return err
	}

	return nil
}