package router

import (
	"errors"
	"net/http"

	"github.com/iliadenisov/galaxy/internal/game"

	"github.com/gin-gonic/gin"
	"github.com/iliadenisov/galaxy/internal/controller"
	"github.com/iliadenisov/galaxy/internal/model/rest"
)

var (
	ErrCommandNotProcessed = errors.New("command was not processed by executor")
)

func CommandHandler(c *gin.Context, executor Executor) {
	var cmd rest.Command
	if err := c.ShouldBindJSON(&cmd); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}
	err := executor(cmd)
	switch {
	case err == nil:
		c.Status(http.StatusOK)
	case errors.Is(err, ErrCommandNotProcessed):
		c.Status(http.StatusInternalServerError)
	default:
		// TODO: separate bad value errors and game state errors
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
	}
}

func Execute(cmd rest.Command) error {
	p := func(p *controller.Param) {
		// TODO: initialize base controller settings
		p.StoragePath = ""
	}
	switch {
	case cmd.DeclareWar != nil:
		return game.DeclareWar(p, cmd.Race, cmd.DeclareWar.Opponent)
	case cmd.DeclarePeace != nil:
		return game.DeclarePeace(p, cmd.Race, cmd.DeclareWar.Opponent)
	default:
		return ErrCommandNotProcessed
	}
}