package interfaces

import (
	"mengstack/internal/kernel/response"
	"mengstack/internal/modules/auth/application"
	"mengstack/internal/modules/auth/domain"

	"github.com/gin-gonic/gin"
)

type Handler struct {
	svc *application.Service
}

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

// Register godoc
// @Summary      用户注册
// @Description  使用邮箱、用户名和密码注册新用户，返回 JWT token
// @Tags         Auth
// @Accept       json
// @Produce      json
// @Param        request  body      domain.RegisterRequest  true  "注册信息"
// @Success      200      {object}  response.Response{data=domain.TokenPair}
// @Failure      400      {object}  response.Response
// @Failure      409      {object}  response.Response
// @Router       /auth/register [post]
func (h *Handler) Register(c *gin.Context) {
	var req domain.RegisterRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		response.Fail(c, response.NewBadRequest("invalid request body"))
		return
	}

	tokens, err := h.svc.Register(c.Request.Context(), req)
	if err != nil {
		response.HandleError(c, err)
		return
	}

	response.Success(c, tokens)
}

// Login godoc
// @Summary      用户登录
// @Description  使用邮箱和密码登录，返回 JWT token
// @Tags         Auth
// @Accept       json
// @Produce      json
// @Param        request  body      domain.LoginRequest  true  "登录信息"
// @Success      200      {object}  response.Response{data=domain.TokenPair}
// @Failure      400      {object}  response.Response
// @Failure      401      {object}  response.Response
// @Router       /auth/login [post]
func (h *Handler) Login(c *gin.Context) {
	var req domain.LoginRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		response.Fail(c, response.NewBadRequest("invalid request body"))
		return
	}

	tokens, err := h.svc.Login(c.Request.Context(), req)
	if err != nil {
		response.HandleError(c, err)
		return
	}

	response.Success(c, tokens)
}

// RefreshToken godoc
// @Summary      刷新 Token
// @Description  使用 refresh_token 获取新的 token 对
// @Tags         Auth
// @Accept       json
// @Produce      json
// @Param        request  body      object  true  "{ \"refresh_token\": \"...\" }"
// @Success      200      {object}  response.Response{data=domain.TokenPair}
// @Failure      400      {object}  response.Response
// @Failure      401      {object}  response.Response
// @Router       /auth/refresh [post]
func (h *Handler) RefreshToken(c *gin.Context) {
	var req struct {
		RefreshToken string `json:"refresh_token" binding:"required"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		response.Fail(c, response.NewBadRequest("invalid request body"))
		return
	}

	tokens, err := h.svc.RefreshToken(c.Request.Context(), req.RefreshToken)
	if err != nil {
		response.HandleError(c, err)
		return
	}

	response.Success(c, tokens)
}

// ChangePassword godoc
// @Summary      修改密码
// @Description  使用旧密码验证后设置新密码
// @Tags         Auth
// @Accept       json
// @Produce      json
// @Param        request  body      domain.ChangePasswordRequest  true  "密码修改请求"
// @Success      200      {object}  response.Response
// @Failure      400      {object}  response.Response
// @Failure      401      {object}  response.Response
// @Security     Bearer
// @Security     TenantID
// @Router       /password [post]
func (h *Handler) ChangePassword(c *gin.Context) {
	userID := c.GetUint("user_id")

	var req domain.ChangePasswordRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		response.Fail(c, response.NewBadRequest("invalid request body"))
		return
	}

	if err := h.svc.ChangePassword(c.Request.Context(), userID, req); err != nil {
		response.HandleError(c, err)
		return
	}

	response.Success(c, nil)
}

// GetProfile godoc
// @Summary      获取当前用户信息
// @Description  返回当前认证用户的个人资料
// @Tags         Auth
// @Produce      json
// @Success      200  {object}  response.Response{data=domain.UserDTO}
// @Failure      401  {object}  response.Response
// @Failure      404  {object}  response.Response
// @Security     Bearer
// @Security     TenantID
// @Router       /profile [get]
func (h *Handler) GetProfile(c *gin.Context) {
	userID := c.GetUint("user_id")

	dto, err := h.svc.GetProfile(c.Request.Context(), userID)
	if err != nil {
		response.HandleError(c, err)
		return
	}

	response.Success(c, dto)
}

// Ping godoc
// @Summary      健康探测
// @Description  返回 pong，用于验证认证和多租户中间件是否正常
// @Tags         System
// @Produce      json
// @Success      200  {object}  response.Response
// @Security     Bearer
// @Security     TenantID
// @Router       /ping [get]
func (h *Handler) Ping(c *gin.Context) {
	response.Success(c, gin.H{"message": "pong"})
}