// Package providers builds the store clients selected by a store name.
//
// It is shared by the CLI (cmd/cheapo) and the MCP server so both select
// stores and regional settings the same way.
package providers

import (
	"fmt"

	"gogs.netdome.biz/paul/cheapo/internal/epic"
	"gogs.netdome.biz/paul/cheapo/internal/game"
	"gogs.netdome.biz/paul/cheapo/internal/gog"
	"gogs.netdome.biz/paul/cheapo/internal/steam"
)

// Names lists the accepted values of Options.Store.
var Names = []string{"epic", "steam", "gog", "all"}

// Options selects stores and regional settings.
type Options struct {
	Store   string // epic, steam, gog or all; empty means all
	Country string // ISO country code for Epic, empty keeps the client default
	Locale  string // store locale for Epic, empty keeps the client default
}

// New returns the providers selected by opts.Store.
func New(opts Options) ([]game.Provider, error) {
	newEpic := func() *epic.Client {
		c := epic.NewClient()
		if opts.Country != "" {
			c.Country = opts.Country
		}
		if opts.Locale != "" {
			c.Locale = opts.Locale
		}
		return c
	}

	switch opts.Store {
	case "epic":
		return []game.Provider{newEpic()}, nil
	case "steam":
		return []game.Provider{steam.NewClient()}, nil
	case "gog":
		return []game.Provider{gog.NewClient()}, nil
	case "", "all":
		return []game.Provider{newEpic(), steam.NewClient(), gog.NewClient()}, nil
	default:
		return nil, fmt.Errorf("unknown store %q (epic, steam, gog, all)", opts.Store)
	}
}