package cmd

import (
	"context"
	"flag"
	"io"

	"code.icb4dc0.de/buildr/buildr/internal/config"

	"code.icb4dc0.de/buildr/buildr/internal/rpc"
	"code.icb4dc0.de/buildr/buildr/modules"

	"github.com/spf13/cobra"
)

type InitLevel int

const (
	InitLevelNone InitLevel = iota
	InitLevelBasic
	InitLevelBuildRConfig
	InitLevelParseConfig
)

const (
	defaultPasswordLength = 32
)

type LevelInitializer interface {
	InitAt(ctx context.Context, lvl InitLevel) error
}

type VaultInitConfig struct {
	PassphraseLength uint `mapstructure:"vault-pw-length"`
}

func (c *VaultInitConfig) Flags() *flag.FlagSet {
	fs := flag.NewFlagSet("vault-init", flag.ExitOnError)

	fs.UintVar(
		&c.PassphraseLength,
		"vault.pw-length",
		defaultPasswordLength,
		"Length of the passphrase to generate",
	)

	return fs
}

type BuildrConfigAccessor interface {
	BuildrConfig() config.Buildr
}

type AppConfigAccessor interface {
	AppConfig() AppConfig
}

type TypeRegistryAccessor interface {
	TypeRegistry() *modules.TypeRegistry
}

type ModuleRepositoryAccessor interface {
	Repository() *modules.Repository
}

type VaultCommander interface {
	Init(ctx context.Context, cfg VaultInitConfig) error
	List(ctx context.Context, writer io.Writer) error
	Get(ctx context.Context, key string, writer io.Writer) error
	Set(ctx context.Context, key string, value []byte) error
	Remove(ctx context.Context, key string) error
}

type PluginCommander interface {
	ListPlugins(ctx context.Context, writer io.Writer) error
	UpdatePlugins(ctx context.Context) error
}

type ServerCommander interface {
	ServeAPI(ctx context.Context, cfg *rpc.GrpcConfig) error
}

type ModuleCommander interface {
	RunModule(ctx context.Context, cat modules.Category, name string) error
}

type BootstrapModuleCommander interface {
	BootstrapModule(ctx context.Context, cat modules.Category, typeName, moduleName string) error
}

type KnownTasksArgProvider interface {
	ValidTasksArgs(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective)
}

type KnownModulesArgProvider interface {
	ValidModulesArgs(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective)
}

type ManCommander interface {
	DisplayModuleManual(ctx context.Context, pager Pager, cat modules.Category, name string) error
	DisplayModulesManual(pager Pager) error
}

type KnownTasksArgProviderFunc func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective)

func (f KnownTasksArgProviderFunc) ValidTasksArgs(
	cmd *cobra.Command,
	args []string,
	toComplete string,
) ([]string, cobra.ShellCompDirective) {
	return f(cmd, args, toComplete)
}

type KnownModulesArgProviderFunc func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective)

func (f KnownModulesArgProviderFunc) ValidModulesArgs(
	cmd *cobra.Command,
	args []string,
	toComplete string,
) ([]string, cobra.ShellCompDirective) {
	return f(cmd, args, toComplete)
}

type AppInitializer interface {
	Init(ctx context.Context) error
}

type AppInitializerFunc func(ctx context.Context) error

func (f AppInitializerFunc) Init(ctx context.Context) error {
	return f(ctx)
}

type EnvCommander interface {
	PrintPath(ctx context.Context, writer io.Writer) error
}