package main

import (
	"io"
	"net/url"
	"os"
	"sort"
	"time"

	"github.com/alecthomas/kong"
	"github.com/apex/log"

	"gitea.unbound.se/unboundsoftware/schemas/ctl"
)

type Context struct {
	ApiKey     string
	SchemaRef  string
	SchemasURL url.URL
	logger     log.Interface
}

type PublishCmd struct {
	Service string   `name:"service" env:"SERVICE" help:"The service to publish SDL for" required:""`
	Url     *url.URL `name:"url" env:"URL" help:"The URL of the service" optional:""`
	WSUrl   *url.URL `name:"ws-url" env:"WS_URL" help:"The Websocket URL of the service" optional:""`
	SDL     *os.File `name:"sdl" env:"SDL" help:"The file containing the GraphQL SDL" required:""`
}

func (c *PublishCmd) Run(ctx Context) error {
	buff, err := io.ReadAll(c.SDL)
	if err != nil {
		return err
	}
	subGraph, err := ctl.Publish(ctx.ApiKey, ctx.SchemaRef, c.Service, string(buff), c.Url, c.WSUrl, ctx.SchemasURL)
	if err != nil {
		return err
	}
	ctx.logger.Infof("published %s@%s %s", subGraph.Service, subGraph.ChangedAt.Format(time.RFC3339), subGraph.ChangedBy)
	return nil
}

type ListCmd struct {
	Service string `name:"service" env:"SERVICE" help:"The service to publish SDL for" optional:""`
}

func (c *ListCmd) Run(ctx Context) error {
	subGraphs, err := ctl.List(ctx.ApiKey, ctx.SchemaRef, c.Service, ctx.SchemasURL)
	if err != nil {
		return err
	}
	sort.SliceStable(subGraphs, func(i, j int) bool {
		return subGraphs[i].Service < subGraphs[j].Service
	})
	for _, subGraph := range subGraphs {
		ctx.logger.Infof("%s URL: %s WS-URL: %s Changed: %s %s", subGraph.Service, emptyIfNil(subGraph.URL), emptyIfNil(subGraph.WSUrl), subGraph.ChangedAt.Format(time.RFC3339), subGraph.ChangedBy)
	}
	return nil
}

type CLI struct {
	ApiKey             string     `name:"api-key" env:"API_KEY" help:"The API-key to use when communicating with the server" required:""`
	SchemaRef          string     `name:"schema-ref" env:"SCHEMA_REF" help:"The schema reference to work with" required:""`
	OverrideSchemasUrl *url.URL   `name:"override-schemas-url" env:"OVERRIDE_SCHEMAS_URL" help:"Use a specific URL when communicating with the Schemas-API" optional:""`
	Publish            PublishCmd `cmd:""`
	List               ListCmd    `cmd:""`
	LogLevel           string     `name:"log-level" env:"LOG_LEVEL" help:"The level of logging to use (debug, info, warn, error, fatal)" default:"info"`
}

func main() {
	cli := CLI{}
	ctx := kong.Parse(&cli)
	log.SetLevelFromString(cli.LogLevel)
	logger := log.WithField("service", "schemactl")
	err := ctx.Run(Context{ApiKey: cli.ApiKey, SchemaRef: cli.SchemaRef, SchemasURL: schemasUrl(cli.OverrideSchemasUrl), logger: logger})
	ctx.FatalIfErrorf(err)
}

func emptyIfNil(s *string) string {
	if s == nil {
		return ""
	}
	return *s
}

func schemasUrl(u *url.URL) url.URL {
	if u == nil {
		u, err := url.Parse("https://schemas.unbound.se/query")
		if err != nil {
			return url.URL{}
		}
		return *u
	}
	return *u
}