package cmd

import (
	"fmt"
	"io"

	wisski_distillery "github.com/FAU-CDI/wisski-distillery"
	"github.com/FAU-CDI/wisski-distillery/internal/cli"
	"github.com/FAU-CDI/wisski-distillery/internal/models"
	"github.com/FAU-CDI/wisski-distillery/internal/wisski"
	"github.com/tkw1536/goprogram/exit"
	"github.com/tkw1536/pkglib/status"
)

// Cron is the 'cron' command
var Rebuild wisski_distillery.Command = rebuild{}

type rebuild struct {
	Parallel int `short:"a" long:"parallel" description:"run on (at most) this many instances in parallel. 0 for no limit." default:"1"`

	PHPVersion         string `short:"p" long:"php" description:"update to specific php version to use for instance. Should be one of '8.0', '8.1'."`
	OPCacheDevelopment bool   `short:"o" long:"opcache-devel" description:"Include opcache development configuration"`
	Positionals        struct {
		Slug []string `positional-arg-name:"SLUG" required:"0" description:"slug of instance or instances to run rebuild"`
	} `positional-args:"true"`
}

func (rebuild) Description() wisski_distillery.Description {
	return wisski_distillery.Description{
		Requirements: cli.Requirements{
			NeedsDistillery: true,
		},
		Command:     "rebuild",
		Description: "runs the rebuild script for several instances",
	}
}

var errRebuildFailed = exit.Error{
	Message:  "failed to run rebuild",
	ExitCode: exit.ExitGeneric,
}

func (rb rebuild) Run(context wisski_distillery.Context) (err error) {
	defer errRebuildFailed.DeferWrap(&err)

	dis := context.Environment

	// find the instances
	wissKIs, err := dis.Instances().Load(context.Context, rb.Positionals.Slug...)
	if err != nil {
		return err
	}

	// and do the actual rebuild
	return status.WriterGroup(context.Stderr, rb.Parallel, func(instance *wisski.WissKI, writer io.Writer) error {
		return instance.SystemManager().Apply(context.Context, writer, models.System{
			PHP:                rb.PHPVersion,
			OpCacheDevelopment: rb.OPCacheDevelopment,
		}, true)
	}, wissKIs, status.SmartMessage(func(item *wisski.WissKI) string {
		return fmt.Sprintf("rebuild %q", item.Slug)
	}))
}