package bossraid

import (
	"log"

	"github.com/gofiber/fiber/v2"
)

type Handler struct {
	svc *Service
}

func NewHandler(svc *Service) *Handler {
	return &Handler{svc: svc}
}

func bossError(c *fiber.Ctx, status int, userMsg string, err error) error {
	log.Printf("bossraid error: %s: %v", userMsg, err)
	return c.Status(status).JSON(fiber.Map{"error": userMsg})
}

// RequestEntry handles POST /api/internal/bossraid/entry
// Called by MMO server when a party requests boss raid entry.
func (h *Handler) RequestEntry(c *fiber.Ctx) error {
	var req struct {
		Usernames []string `json:"usernames"`
		BossID    int      `json:"bossId"`
	}
	if err := c.BodyParser(&req); err != nil {
		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "잘못된 요청입니다"})
	}
	if len(req.Usernames) == 0 || req.BossID <= 0 {
		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "usernames와 bossId는 필수입니다"})
	}
	for _, u := range req.Usernames {
		if len(u) == 0 || len(u) > 50 {
			return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "유효하지 않은 username입니다"})
		}
	}

	room, err := h.svc.RequestEntry(req.Usernames, req.BossID)
	if err != nil {
		return bossError(c, fiber.StatusConflict, err.Error(), err)
	}

	return c.Status(fiber.StatusCreated).JSON(fiber.Map{
		"roomId":      room.ID,
		"sessionName": room.SessionName,
		"bossId":      room.BossID,
		"players":     req.Usernames,
		"status":      room.Status,
	})
}

// StartRaid handles POST /api/internal/bossraid/start
// Called by dedicated server when the Fusion session begins.
func (h *Handler) StartRaid(c *fiber.Ctx) error {
	var req struct {
		SessionName string `json:"sessionName"`
	}
	if err := c.BodyParser(&req); err != nil {
		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "잘못된 요청입니다"})
	}
	if req.SessionName == "" {
		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "sessionName은 필수입니다"})
	}

	room, err := h.svc.StartRaid(req.SessionName)
	if err != nil {
		return bossError(c, fiber.StatusBadRequest, err.Error(), err)
	}

	return c.JSON(fiber.Map{
		"roomId":      room.ID,
		"sessionName": room.SessionName,
		"status":      room.Status,
	})
}

// CompleteRaid handles POST /api/internal/bossraid/complete
// Called by dedicated server when the boss is killed. Distributes rewards.
func (h *Handler) CompleteRaid(c *fiber.Ctx) error {
	var req struct {
		SessionName string         `json:"sessionName"`
		Rewards     []PlayerReward `json:"rewards"`
	}
	if err := c.BodyParser(&req); err != nil {
		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "잘못된 요청입니다"})
	}
	if req.SessionName == "" {
		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "sessionName은 필수입니다"})
	}

	room, results, err := h.svc.CompleteRaid(req.SessionName, req.Rewards)
	if err != nil {
		return bossError(c, fiber.StatusBadRequest, err.Error(), err)
	}

	return c.JSON(fiber.Map{
		"roomId":        room.ID,
		"sessionName":   room.SessionName,
		"status":        room.Status,
		"rewardResults": results,
	})
}

// FailRaid handles POST /api/internal/bossraid/fail
// Called by dedicated server on timeout or party wipe.
func (h *Handler) FailRaid(c *fiber.Ctx) error {
	var req struct {
		SessionName string `json:"sessionName"`
	}
	if err := c.BodyParser(&req); err != nil {
		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "잘못된 요청입니다"})
	}
	if req.SessionName == "" {
		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "sessionName은 필수입니다"})
	}

	room, err := h.svc.FailRaid(req.SessionName)
	if err != nil {
		return bossError(c, fiber.StatusBadRequest, err.Error(), err)
	}

	return c.JSON(fiber.Map{
		"roomId":      room.ID,
		"sessionName": room.SessionName,
		"status":      room.Status,
	})
}

// GetRoom handles GET /api/internal/bossraid/room
// Query param: sessionName
func (h *Handler) GetRoom(c *fiber.Ctx) error {
	sessionName := c.Query("sessionName")
	if sessionName == "" {
		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "sessionName은 필수입니다"})
	}

	room, err := h.svc.GetRoom(sessionName)
	if err != nil {
		return bossError(c, fiber.StatusNotFound, "방을 찾을 수 없습니다", err)
	}

	return c.JSON(room)
}