package config

import (
	"os"
	"strings"
)

type Config struct {
	Port            string   // GITEA_MCP_PORT, default 8080
	GiteaBaseURL    string   // GITEA_BASE_URL, e.g. https://gitea.d-ma.be
	GiteaAPIToken   string   // GITEA_API_TOKEN — bot user token
	AllowedOwners   []string // GITEA_MCP_ALLOWED_OWNERS, comma-separated, default "mathias"
	OriginAllowlist []string // GITEA_MCP_ORIGIN_ALLOWLIST, comma-separated
}

func Load() (Config, error) {
	cfg := Config{
		Port:            envOr("GITEA_MCP_PORT", "8080"),
		GiteaBaseURL:    os.Getenv("GITEA_BASE_URL"),
		GiteaAPIToken:   os.Getenv("GITEA_API_TOKEN"),
		AllowedOwners:   splitCSV(envOr("GITEA_MCP_ALLOWED_OWNERS", "mathias")),
		OriginAllowlist: splitCSV(os.Getenv("GITEA_MCP_ORIGIN_ALLOWLIST")),
	}
	return cfg, nil
}

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

func splitCSV(s string) []string {
	if s == "" {
		return nil
	}
	parts := strings.Split(s, ",")
	out := make([]string, 0, len(parts))
	for _, p := range parts {
		if p = strings.TrimSpace(p); p != "" {
			out = append(out, p)
		}
	}
	return out
}