package exerr

import (
	"fmt"
	"gogs.mikescher.com/BlackForestBytes/goext/langext"
)

type ErrorPackageConfig struct {
	ZeroLogErrTraces    bool                      // autom print zerolog logs on .Build()  (for SevErr and SevFatal)
	ZeroLogAllTraces    bool                      // autom print zerolog logs on .Build()  (for all Severities)
	RecursiveErrors     bool                      // errors contains their Origin-Error
	ExtendedGinOutput   bool                      // Log extended data (trace, meta, ...) to gin in err.Output()
	ExtendGinOutput     func(json map[string]any) // (Optionally) extend the gin output with more fields
	ExtendGinDataOutput func(json map[string]any) // (Optionally) extend the gin `__data` output with more fields
}

type ErrorPackageConfigInit struct {
	ZeroLogErrTraces    bool
	ZeroLogAllTraces    bool
	RecursiveErrors     bool
	ExtendedGinOutput   bool
	ExtendGinOutput     *func(json map[string]any)
	ExtendGinDataOutput *func(json map[string]any)
}

var initialized = false

var pkgconfig = ErrorPackageConfig{
	ZeroLogErrTraces:    true,
	ZeroLogAllTraces:    false,
	RecursiveErrors:     true,
	ExtendedGinOutput:   false,
	ExtendGinOutput:     func(json map[string]any) {},
	ExtendGinDataOutput: func(json map[string]any) {},
}

// Init initializes the exerr packages
// Must be called at the program start, before (!) any errors
// Is not thread-safe
func Init(cfg ErrorPackageConfigInit) {
	if initialized {
		panic("Cannot re-init error package")
	}

	pkgconfig = ErrorPackageConfig{
		ZeroLogErrTraces:    cfg.ZeroLogErrTraces,
		ZeroLogAllTraces:    cfg.ZeroLogAllTraces,
		RecursiveErrors:     cfg.RecursiveErrors,
		ExtendedGinOutput:   cfg.ExtendedGinOutput,
		ExtendGinOutput:     langext.Coalesce(cfg.ExtendGinOutput, func(json map[string]any) {}),
		ExtendGinDataOutput: langext.Coalesce(cfg.ExtendGinDataOutput, func(json map[string]any) {}),
	}

	initialized = true
}

func warnOnPkgConfigNotInitialized() {
	if !initialized {
		fmt.Printf("\n")
		fmt.Printf("%s\n", langext.StrRepeat("=", 80))
		fmt.Printf("%s\n", "[WARNING] exerr package used without initializiation")
		fmt.Printf("%s\n", "          call exerr.Init() in your main() function")
		fmt.Printf("%s\n", langext.StrRepeat("=", 80))
		fmt.Printf("\n")
	}
}