// Copyright (C) 2024  Umorpha Systems
// SPDX-License-Identifier: AGPL-3.0-or-later

package common

import (
	"encoding"
	"fmt"
	"io/fs"
	"os"
	"time"
)

type JobID int

type JobStatus int

const (
	StatusNew JobStatus = iota
	StatusRunning
	StatusSucceeded
	StatusFailed
	StatusError
	StatusAll JobStatus = -1
)

var (
	_ fmt.Stringer             = JobStatus(0)
	_ encoding.TextMarshaler   = JobStatus(0)
	_ encoding.TextUnmarshaler = (*JobStatus)(nil)
)

// String implements [fmt.Stringer].
func (s JobStatus) String() string {
	switch s {
	case StatusNew:
		return "new"
	case StatusRunning:
		return "running"
	case StatusSucceeded:
		return "succeeded"
	case StatusFailed:
		return "failed"
	case StatusError:
		return "error"
	default:
		return fmt.Sprintf("InvalidStatus(%d)", s)
	}
}

// MarshalText implements [encoding.TextMarshaler].
func (s JobStatus) MarshalText() ([]byte, error) {
	switch s {
	case StatusNew:
		return []byte("new"), nil
	case StatusRunning:
		return []byte("running"), nil
	case StatusSucceeded:
		return []byte("succeeded"), nil
	case StatusFailed:
		return []byte("failed"), nil
	case StatusError:
		return []byte("error"), nil
	default:
		return nil, fmt.Errorf("unknown job status: %d", s)
	}
}

// UnmarshalText implements [encoding.TextUnmarshaler].
func (s *JobStatus) UnmarshalText(text []byte) error {
	switch string(text) {
	case "new":
		*s = StatusNew
	case "running":
		*s = StatusRunning
	case "succeeded":
		*s = StatusSucceeded
	case "failed":
		*s = StatusFailed
	case "error":
		*s = StatusError
	default:
		return fmt.Errorf("unknown job status: %q", text)
	}
	return nil
}

func (s JobStatus) HasLog() bool {
	return s != StatusNew
}

func (s JobStatus) Finished() bool {
	switch s {
	case StatusSucceeded, StatusFailed, StatusError:
		return true
	default:
		return false
	}
}

type Job struct {
	ID                 JobID
	TriggerExpressions []string
	TriggerValues      []string
	Command            string
	Status             JobStatus
	StatusMsg          string `json:",omitempty"`
	CreatedAt          time.Time
	UpdatedAt          time.Time

	Dir string `json:"-"`
}

func (j Job) DirFS() fs.FS {
	return os.DirFS(j.Dir)
}