package main

import (
	"fmt"
	"log"
	"os"
	"time"

	"github.com/joho/godotenv"
	"github.com/urfave/cli"
)

// Version set at compile-time
var Version string

func main() {
	// Load env-file if it exists first
	if filename, found := os.LookupEnv("PLUGIN_ENV_FILE"); found {
		_ = godotenv.Load(filename)
	}

	if _, err := os.Stat("/run/drone/env"); err == nil {
		_ = godotenv.Overload("/run/drone/env")
	}

	year := fmt.Sprintf("%v", time.Now().Year())
	app := cli.NewApp()
	app.Name = "Drone Discord"
	app.Usage = "Sending message to Discord channel using Webhook"
	app.Copyright = "Copyright (c) " + year + " Bo-Yi Wu"
	app.Authors = []cli.Author{
		{
			Name:  "Bo-Yi Wu",
			Email: "appleboy.tw@gmail.com",
		},
	}
	app.Action = run
	app.Version = Version
	app.Flags = []cli.Flag{
		cli.StringFlag{
			Name:   "webhook-id",
			Usage:  "discord webhook id",
			EnvVar: "PLUGIN_WEBHOOK_ID,WEBHOOK_ID,DISCORD_WEBHOOK_ID,INPUT_WEBHOOK_ID",
		},
		cli.StringFlag{
			Name:   "webhook-token",
			Usage:  "discord webhook token",
			EnvVar: "PLUGIN_WEBHOOK_TOKEN,WEBHOOK_TOKEN,DISCORD_WEBHOOK_TOKEN,INPUT_WEBHOOK_TOKEN",
		},
		cli.StringSliceFlag{
			Name:   "message",
			Usage:  "the message contents (up to 2000 characters)",
			EnvVar: "PLUGIN_MESSAGE,DISCORD_MESSAGE,MESSAGE,INPUT_MESSAGE",
		},
		cli.StringSliceFlag{
			Name:   "file",
			Usage:  "the contents of the file being sent",
			EnvVar: "PLUGIN_FILE,DISCORD_FILE,FILE,INPUT_FILE",
		},
		cli.StringFlag{
			Name:   "color",
			Usage:  "color code of the embed",
			EnvVar: "PLUGIN_COLOR,COLOR,INPUT_COLOR",
		},
		cli.BoolFlag{
			Name:   "wait",
			Usage:  "waits for server confirmation of message send before response, and returns the created message body",
			EnvVar: "PLUGIN_WAIT,WAIT,INPUT_WAIT",
		},
		cli.BoolFlag{
			Name:   "tts",
			Usage:  "true if this is a TTS message",
			EnvVar: "PLUGIN_TTS,TTS,INPUT_TTS",
		},
		cli.StringFlag{
			Name:   "username",
			Usage:  "override the default username of the webhook",
			EnvVar: "PLUGIN_USERNAME,USERNAME,INPUT_USERNAME",
		},
		cli.StringFlag{
			Name:   "avatar-url",
			Usage:  "override the default avatar of the webhook",
			EnvVar: "PLUGIN_AVATAR_URL,AVATAR_URL,INPUT_AVATAR_URL",
		},
		cli.BoolFlag{
			Name:   "drone",
			Usage:  "environment is drone",
			EnvVar: "DRONE",
		},
		cli.StringFlag{
			Name:   "repo",
			Usage:  "repository owner and repository name",
			EnvVar: "DRONE_REPO,GITHUB_REPOSITORY",
		},
		cli.StringFlag{
			Name:   "repo.namespace",
			Usage:  "repository namespace",
			EnvVar: "DRONE_REPO_OWNER,DRONE_REPO_NAMESPACE,GITHUB_ACTOR",
		},
		cli.StringFlag{
			Name:   "repo.name",
			Usage:  "repository name",
			EnvVar: "DRONE_REPO_NAME",
		},
		cli.StringFlag{
			Name:   "commit.sha",
			Usage:  "git commit sha",
			EnvVar: "DRONE_COMMIT_SHA,GITHUB_SHA",
		},
		cli.StringFlag{
			Name:   "commit.ref",
			Usage:  "git commit ref",
			EnvVar: "DRONE_COMMIT_REF,GITHUB_REF",
		},
		cli.StringFlag{
			Name:   "commit.branch",
			Value:  "master",
			Usage:  "git commit branch",
			EnvVar: "DRONE_COMMIT_BRANCH",
		},
		cli.StringFlag{
			Name:   "commit.link",
			Usage:  "git commit link",
			EnvVar: "DRONE_COMMIT_LINK",
		},
		cli.StringFlag{
			Name:   "commit.author",
			Usage:  "git author name",
			EnvVar: "DRONE_COMMIT_AUTHOR",
		},
		cli.StringFlag{
			Name:   "commit.author.email",
			Usage:  "git author email",
			EnvVar: "DRONE_COMMIT_AUTHOR_EMAIL",
		},
		cli.StringFlag{
			Name:   "commit.author.avatar",
			Usage:  "git author avatar",
			EnvVar: "DRONE_COMMIT_AUTHOR_AVATAR",
		},
		cli.StringFlag{
			Name:   "commit.message",
			Usage:  "commit message",
			EnvVar: "DRONE_COMMIT_MESSAGE",
		},
		cli.StringFlag{
			Name:   "build.event",
			Value:  "push",
			Usage:  "build event",
			EnvVar: "DRONE_BUILD_EVENT",
		},
		cli.IntFlag{
			Name:   "build.number",
			Usage:  "build number",
			EnvVar: "DRONE_BUILD_NUMBER",
		},
		cli.StringFlag{
			Name:   "build.status",
			Usage:  "build status",
			Value:  "success",
			EnvVar: "DRONE_BUILD_STATUS",
		},
		cli.StringFlag{
			Name:   "build.link",
			Usage:  "build link",
			EnvVar: "DRONE_BUILD_LINK",
		},
		cli.StringFlag{
			Name:   "build.tag",
			Usage:  "build tag",
			EnvVar: "DRONE_TAG",
		},
		cli.StringFlag{
			Name:   "pull.request",
			Usage:  "pull request",
			EnvVar: "DRONE_PULL_REQUEST",
		},
		cli.Int64Flag{
			Name:   "build.started",
			Usage:  "build started",
			EnvVar: "DRONE_BUILD_STARTED",
		},
		cli.Int64Flag{
			Name:   "build.finished",
			Usage:  "build finished",
			EnvVar: "DRONE_BUILD_FINISHED",
		},
		cli.BoolFlag{
			Name:   "github",
			Usage:  "Boolean value, indicates the runtime environment is GitHub Action.",
			EnvVar: "PLUGIN_GITHUB,GITHUB",
		},
		cli.StringFlag{
			Name:   "github.workflow",
			Usage:  "The name of the workflow.",
			EnvVar: "GITHUB_WORKFLOW",
		},
		cli.StringFlag{
			Name:   "github.action",
			Usage:  "The name of the action.",
			EnvVar: "GITHUB_ACTION",
		},
		cli.StringFlag{
			Name:   "github.event.name",
			Usage:  "The webhook name of the event that triggered the workflow.",
			EnvVar: "GITHUB_EVENT_NAME",
		},
		cli.StringFlag{
			Name:   "github.event.path",
			Usage:  "The path to a file that contains the payload of the event that triggered the workflow. Value: /github/workflow/event.json.",
			EnvVar: "GITHUB_EVENT_PATH",
		},
		cli.StringFlag{
			Name:   "github.workspace",
			Usage:  "The GitHub workspace path. Value: /github/workspace.",
			EnvVar: "GITHUB_WORKSPACE",
		},
		cli.StringFlag{
			Name:   "deploy.to",
			Usage:  "Provides the target deployment environment for the running build. This value is only available to promotion and rollback pipelines.",
			EnvVar: "DRONE_DEPLOY_TO",
		},
	}

	if err := app.Run(os.Args); err != nil {
		log.Fatal(err)
	}
}

func run(c *cli.Context) error {
	plugin := Plugin{
		GitHub: GitHub{
			Workflow:  c.String("github.workflow"),
			Workspace: c.String("github.workspace"),
			Action:    c.String("github.action"),
			EventName: c.String("github.event.name"),
			EventPath: c.String("github.event.path"),
		},
		Repo: Repo{
			FullName:  c.String("repo"),
			Namespace: c.String("repo.namespace"),
			Name:      c.String("repo.name"),
		},
		Commit: Commit{
			Sha:     c.String("commit.sha"),
			Ref:     c.String("commit.ref"),
			Branch:  c.String("commit.branch"),
			Link:    c.String("commit.link"),
			Author:  c.String("commit.author"),
			Email:   c.String("commit.author.email"),
			Avatar:  c.String("commit.author.avatar"),
			Message: c.String("commit.message"),
		},
		Build: Build{
			Tag:      c.String("build.tag"),
			Number:   c.Int("build.number"),
			Event:    c.String("build.event"),
			Status:   c.String("build.status"),
			Link:     c.String("build.link"),
			Started:  c.Int64("build.started"),
			Finished: c.Int64("build.finished"),
			PR:       c.String("pull.request"),
			DeployTo: c.String("deploy.to"),
		},
		Config: Config{
			WebhookID:    c.String("webhook-id"),
			WebhookToken: c.String("webhook-token"),
			Message:      c.StringSlice("message"),
			File:         c.StringSlice("file"),
			Color:        c.String("color"),
			Drone:        c.Bool("drone"),
			GitHub:       c.Bool("github"),
		},
		Payload: Payload{
			Wait:      c.Bool("wait"),
			Username:  c.String("username"),
			AvatarURL: c.String("avatar-url"),
			TTS:       c.Bool("tts"),
		},
	}

	return plugin.Exec()
}