package config

import (
	"os"
	"strconv"
	"strings"

	sdkconfig "github.com/go-admin-team/go-admin-core/sdk/config"
)

var ExtConfig Extend

// Extend 扩展配置
//
//	extend:
//	  demo:
//	    name: demo-name
//
// 使用方法： config.ExtConfig......即可！！
type Extend struct {
	AMap AMap // 这里配置对应配置文件的结构即可
	SYB  SYB
}

type AMap struct {
	Key string
}

// SYB holds the 顺云宝 ERP connection settings (#48).
//
// `[必须]` Username and Password are NOT read from settings.yml — they come
// from GOAUTO_SYB_USERNAME / GOAUTO_SYB_PASSWORD via ApplyEnvironment, so no
// credential ever lands in a tracked file. Everything else here is non-secret
// and belongs in settings.yml.
//
// See docs/12-syb-erp-interface.md §8.
type SYB struct {
	BaseURL  string
	Username string
	Password string
	PageSize int
	// MaxMatches caps how many shipment orders one sync may touch. Zero means
	// the caller's own default applies.
	MaxMatches int
	// OcrURL is the captcha recognition service. Empty disables OCR and falls
	// back to the manual-entry path — that is a supported configuration, not an
	// error (§8.1).
	//
	// `[必须]` Captcha images are sent to this host. Re-evaluate before pointing
	// it at a service operated by somebody else.
	OcrURL         string
	OcrMaxAttempts int
}

// SYBDefaults are the values used when settings.yml leaves a field blank.
const (
	DefaultSYBBaseURL        = "https://www.shunyunbaoerp.com"
	DefaultSYBPageSize       = 50
	DefaultSYBMaxMatches     = 10000
	DefaultSYBOcrMaxAttempts = 5
)

// Resolved returns the SYB settings with blanks replaced by defaults. It never
// defaults Username or Password: missing credentials must surface as an error
// at the call site, not as an attempt to log in as nobody.
func (s SYB) Resolved() SYB {
	if strings.TrimSpace(s.BaseURL) == "" {
		s.BaseURL = DefaultSYBBaseURL
	}
	if s.PageSize <= 0 {
		s.PageSize = DefaultSYBPageSize
	}
	if s.MaxMatches <= 0 {
		s.MaxMatches = DefaultSYBMaxMatches
	}
	if s.OcrMaxAttempts <= 0 {
		s.OcrMaxAttempts = DefaultSYBOcrMaxAttempts
	}
	s.Username = strings.TrimSpace(s.Username)
	s.BaseURL = strings.TrimRight(strings.TrimSpace(s.BaseURL), "/")
	s.OcrURL = strings.TrimSpace(s.OcrURL)
	return s
}

// HasCredentials reports whether both account fields were supplied. Callers
// check this before starting a sync so a missing environment variable fails
// with a clear message instead of a 未登录 error from SYB.
func (s SYB) HasCredentials() bool {
	return strings.TrimSpace(s.Username) != "" && s.Password != ""
}

// ApplyEnvironment replaces tracked defaults with process-local runtime values.
// Credentials stay outside tracked configuration files. GOAUTO_DB_DRIVER
// defaults to mysql when GOAUTO_DB_DSN is present.
func ApplyEnvironment() {
	if port, err := strconv.Atoi(strings.TrimSpace(os.Getenv("GOAUTO_SERVER_PORT"))); err == nil && port >= 1 && port <= 65535 {
		sdkconfig.ApplicationConfig.Port = int64(port)
	}
	if username := strings.TrimSpace(os.Getenv("GOAUTO_SYB_USERNAME")); username != "" {
		ExtConfig.SYB.Username = username
	}
	// `[必须]` The password is taken verbatim: trimming it would silently change
	// a credential whose leading or trailing space is intentional.
	if password := os.Getenv("GOAUTO_SYB_PASSWORD"); password != "" {
		ExtConfig.SYB.Password = password
	}

	dsn := strings.TrimSpace(os.Getenv("GOAUTO_DB_DSN"))
	if dsn == "" {
		return
	}
	driver := strings.TrimSpace(os.Getenv("GOAUTO_DB_DRIVER"))
	if driver == "" {
		driver = "mysql"
	}
	sdkconfig.DatabaseConfig.Driver = driver
	sdkconfig.DatabaseConfig.Source = dsn
	for _, database := range sdkconfig.DatabasesConfig {
		database.Driver = driver
		database.Source = dsn
	}
}