/*
 * MIT License
 *
 * Copyright (c) 2022 Nicolas JUHEL
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 *
 */

package server

import (
	"bytes"
	"context"
	"fmt"
	"os"
	"runtime"
	"time"
)

type FunCheck func() bool
type FunRun func()

func RunNbr(max uint8, chk FunCheck, run FunRun) bool {
	var i uint8

	for i = 0; i < max; i++ {
		if chk() {
			return true
		}

		run()
	}

	return chk()
}

func RunTick(ctx context.Context, tick, max time.Duration, chk FunCheck, run FunRun) bool {
	var (
		s = time.Now()
		t = time.NewTicker(tick)
	)

	defer t.Stop()

	for {
		select {
		case <-ctx.Done():
			return false

		case <-t.C:
			if chk() {
				return true
			}

			run()

			if time.Since(s) >= max {
				return chk()
			}
		}
	}
}

func RecoveryCaller(proc string, rec any, data ...any) {
	if rec == nil {
		return
	}

	var (
		buf = bytes.NewBuffer(make([]byte, 0))

		// Set size to targetFrameIndex+2 to ensure we have room for one more caller than we need.
		pCnt = make([]uintptr, 10, 255)
		nCnt = runtime.Callers(1, pCnt)
	)

	buf.WriteString(fmt.Sprintf("Receoring process '%s': %v\n", proc, rec))
	for _, d := range data {
		buf.WriteString(fmt.Sprintf("%v\n", d))
	}

	if nCnt > 0 {
		var (
			frames = runtime.CallersFrames(pCnt[:nCnt])
			more   = true
			lCnt   = 0
		)

		for more && lCnt < 10 {
			var frame runtime.Frame
			frame, more = frames.Next()

			if len(frame.File) > 0 {
				buf.WriteString(fmt.Sprintf("  trace #%d => Line: %d - File: %s\n", lCnt, frame.Line, frame.File))
				lCnt++
			} else if len(frame.Function) > 0 {
				buf.WriteString(fmt.Sprintf("  trace #%d => Line: %d - Func: %s\n", lCnt, frame.Line, frame.Function))
				lCnt++
			}
		}
	}

	if buf.Len() > 0 {
		_, _ = fmt.Fprint(os.Stderr, buf.Bytes())
	}
}