package codegen

import (
	"embed"
	"fmt"
	"os"
	"os/exec"
	"text/template"

	"git.offline-twitter.com/offline-labs/gas-stack/pkg/must"
)

//go:embed "tpl"
var tpl embed.FS

type PkgOpts struct {
	ModuleName string
	DBFilename string
	BinaryName string
}

func InitPkg(opts PkgOpts) {
	// Run `go mod init`
	fmt.Printf("Running...  `go mod init %s`\n", opts.ModuleName)
	must.Do(exec.Command("go", "mod", "init", opts.ModuleName).Run())

	// Run `git init`, if required
	if exec.Command("git", "status").Run() != nil {
		// Not in a git repo yet; init one
		fmt.Println("Running...  `git init`")
		must.Do(exec.Command("git", "init").Run())
	}

	// Create package structure
	must.Do(os.MkdirAll("pkg/db", 0o755))
	must.Do(os.MkdirAll("cmd", 0o755))
	must.Do(os.MkdirAll("doc", 0o755))
	must.Do(os.MkdirAll("sample_data", 0o755))

	must.Do(os.WriteFile("pkg/db/schema.sql", must.Get(tpl.ReadFile("tpl/schema.sql")), 0o664))
	must.Do(os.WriteFile("pkg/db/db.go", must.Get(tpl.ReadFile("tpl/db.go.tpl")), 0o664))

	dbTest := must.Get(os.Create("pkg/db/db_test.go"))
	defer must.Close(dbTest)
	t := must.Get(template.ParseFS(tpl, "tpl/db_test.go.tpl"))
	must.Do(t.Execute(dbTest, opts))

	must.Do(os.WriteFile("sample_data/mount.sh", must.Get(tpl.ReadFile("tpl/mount.sh")), 0o775))
	must.Do(os.WriteFile("sample_data/reset.sh", must.Get(tpl.ReadFile("tpl/reset.sh")), 0o775))

	// TODO:
	// - create `pkg/db/errors.go`
	// - create `sample_data/seed.sql`
	// - create `sample_data/data/`
	// - create `.gitignore`
	// - do something with `db_setup.go` (should go in Gas Stack `pkg/db`)
}