package config

import (
	"bufio"
	"os"
	"path/filepath"
	"strconv"
	"strings"
)

var (
	BLOG_ROOT      string
	CONTENT_DIR    string
	RECYCLE_DIR    string
	ARTALK_SERVER  = "https://artalk.usj.cc"
	ARTALK_SITE    = "???"
	ITEMS_PER_PAGE = 20
	RECYCLE_DAYS   = 30
	HUGO_PREVIEW   = "http://localhost:1313"
	RSS_API_BASE   string
	RSS_API_TOKEN  string
	SCF_PROXY      string
	WECHAT_APP_ID     string
	WECHAT_APP_SECRET string
	DEEPSEEK_API_KEY  string
	DEEPSEEK_BASE_URL string
	DEEPSEEK_MODEL    string
)

func Init() {
	cwd, _ := os.Getwd()
	BLOG_ROOT = filepath.Clean(filepath.Join(cwd, ".."))
	CONTENT_DIR = filepath.Join(BLOG_ROOT, "content", "post")
	RECYCLE_DIR = filepath.Join(cwd, ".recycle")

	loadEnv()

	RSS_API_BASE = getEnv("RSS_API_BASE", "https://api.usj.cc")
	RSS_API_TOKEN = os.Getenv("RSS_API_TOKEN")
	SCF_PROXY = getEnv("SCF_PROXY", "")
	WECHAT_APP_ID = os.Getenv("WECHAT_APP_ID")
	WECHAT_APP_SECRET = os.Getenv("WECHAT_APP_SECRET")
	DEEPSEEK_API_KEY = os.Getenv("DEEPSEEK_API_KEY")
	DEEPSEEK_BASE_URL = getEnv("DEEPSEEK_BASE_URL", "https://api.deepseek.com")
	DEEPSEEK_MODEL = getEnv("DEEPSEEK_MODEL", "deepseek-chat")
}

func loadEnv() {
	envPaths := []string{
		filepath.Join(BLOG_ROOT, "write-go", ".env"),
		filepath.Join(BLOG_ROOT, "write", ".env"),
	}
	for _, p := range envPaths {
		f, err := os.Open(p)
		if err != nil {
			continue
		}
		scanner := bufio.NewScanner(f)
		for scanner.Scan() {
			line := strings.TrimSpace(scanner.Text())
			if line == "" || strings.HasPrefix(line, "#") {
				continue
			}
			parts := strings.SplitN(line, "=", 2)
			if len(parts) != 2 {
				continue
			}
			key := strings.TrimSpace(parts[0])
			val := strings.TrimSpace(parts[1])
			if os.Getenv(key) == "" {
				os.Setenv(key, val)
			}
		}
		f.Close()
		break
	}
}

func getEnv(key, fallback string) string {
	if v := os.Getenv(key); v != "" {
		return v
	}
	return fallback
}

func GetEnvInt(key string, fallback int) int {
	if v := os.Getenv(key); v != "" {
		if n, err := strconv.Atoi(v); err == nil {
			return n
		}
	}
	return fallback
}