// Copyright 2022 Woodpecker Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package exec

import (
	"fmt"
	"os"
	"strings"
	"time"

	"go.woodpecker-ci.org/woodpecker/v2/pipeline/rpc"
)

// LineWriter sends logs to the client.
type LineWriter struct {
	stepName string
	stepUUID string
	num      int
	now      time.Time
	rep      *strings.Replacer
	lines    []*rpc.LogEntry
}

// NewLineWriter returns a new line reader.
func NewLineWriter(stepName, stepUUID string) *LineWriter {
	return &LineWriter{
		stepName: stepName,
		stepUUID: stepUUID,
		now:      time.Now().UTC(),
	}
}

func (w *LineWriter) Write(p []byte) (n int, err error) {
	data := string(p)
	if w.rep != nil {
		data = w.rep.Replace(data)
	}

	line := &rpc.LogEntry{
		Data:     data,
		StepUUID: w.stepUUID,
		Line:     w.num,
		Time:     int64(time.Since(w.now).Seconds()),
		Type:     rpc.LogEntryStdout,
	}

	fmt.Fprintf(os.Stderr, "[%s:L%d:%ds] %s", w.stepName, w.num, int64(time.Since(w.now).Seconds()), data)

	w.num++

	w.lines = append(w.lines, line)
	return len(p), nil
}