package controller

import (
	"net/http"

	"gofaster/internal/auth/model"
	"gofaster/internal/auth/service"
	"gofaster/internal/shared/middleware"
	"gofaster/internal/shared/response"

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

type PasswordController struct {
	passwordService *service.PasswordService
	userService     *service.UserService
}

func NewPasswordController(
	passwordService *service.PasswordService,
	userService *service.UserService,
) *PasswordController {
	return &PasswordController{
		passwordService: passwordService,
		userService:     userService,
	}
}

// ChangePassword 修改密码
// @Summary 修改密码
// @Description 用户修改自己的密码
// @Tags 密码管理
// @Accept json
// @Produce json
// @Param request body object{current_password=string,new_password=string,confirm_password=string} true "密码修改请求"
// @Success 200 {object} response.Response
// @Failure 400 {object} response.Response
// @Failure 500 {object} response.Response
// @Router /api/auth/change-password [post]
func (c *PasswordController) ChangePassword(ctx *gin.Context) {
	var req struct {
		CurrentPassword string `json:"current_password" binding:"required"`
		NewPassword     string `json:"new_password" binding:"required"`
		ConfirmPassword string `json:"confirm_password" binding:"required"`
	}

	if err := ctx.ShouldBindJSON(&req); err != nil {
		response.Error(ctx, http.StatusBadRequest, "请求参数错误", err.Error())
		return
	}

	// 验证确认密码
	if req.NewPassword != req.ConfirmPassword {
		response.Error(ctx, http.StatusBadRequest, "新密码与确认密码不一致", "")
		return
	}

	// 获取当前用户ID
	userID := middleware.GetUserID(ctx)

	// 调用服务层修改密码
	err := c.passwordService.ChangePassword(ctx, userID, req.CurrentPassword, req.NewPassword)
	if err != nil {
		response.Error(ctx, http.StatusInternalServerError, "修改密码失败", err.Error())
		return
	}

	response.Success(ctx, "密码修改成功", nil)
}

// ResetPassword 重置密码
// @Summary 重置密码
// @Description 管理员重置用户密码
// @Tags 密码管理
// @Accept json
// @Produce json
// @Param id path int true "用户ID"
// @Param request body object{new_password=string} true "新密码"
// @Success 200 {object} response.Response
// @Failure 400 {object} response.Response
// @Failure 500 {object} response.Response
// @Router /api/auth/admin/users/{id}/reset-password [post]
func (c *PasswordController) ResetPassword(ctx *gin.Context) {
	var req struct {
		UserID uint `json:"user_id" binding:"required"`
	}

	if err := ctx.ShouldBindJSON(&req); err != nil {
		response.Error(ctx, http.StatusBadRequest, "请求参数错误", err.Error())
		return
	}

	// 调用服务层重置密码
	err := c.passwordService.ResetPassword(ctx, req.UserID)
	if err != nil {
		response.Error(ctx, http.StatusInternalServerError, "重置密码失败", err.Error())
		return
	}

	response.Success(ctx, "密码重置成功", nil)
}

// GetPasswordPolicy 获取密码策略
// @Summary 获取密码策略
// @Description 获取系统密码策略配置
// @Tags 密码管理
// @Accept json
// @Produce json
// @Success 200 {object} response.Response{data=model.PasswordPolicy}
// @Failure 500 {object} response.Response
// @Router /api/auth/password-policy [get]
func (c *PasswordController) GetPasswordPolicy(ctx *gin.Context) {
	policy, err := c.passwordService.GetPasswordPolicy()
	if err != nil {
		response.Error(ctx, http.StatusInternalServerError, "获取密码策略失败", err.Error())
		return
	}

	response.Success(ctx, "获取密码策略成功", policy)
}

// ValidatePassword 验证密码
// @Summary 验证密码
// @Description 验证密码是否符合策略要求
// @Tags 密码管理
// @Accept json
// @Produce json
// @Param request body object{password=string} true "密码"
// @Success 200 {object} response.Response{data=object{valid=bool,message=string}}
// @Failure 400 {object} response.Response
// @Router /api/auth/validate-password [post]
func (c *PasswordController) ValidatePassword(ctx *gin.Context) {
	var req struct {
		Password string `json:"password" binding:"required"`
	}

	if err := ctx.ShouldBindJSON(&req); err != nil {
		response.Error(ctx, http.StatusBadRequest, "请求参数错误", err.Error())
		return
	}

	// 获取当前用户ID
	userID := middleware.GetUserID(ctx)

	result, err := c.passwordService.ValidatePassword(ctx, userID, req.Password)
	if err != nil {
		response.Error(ctx, http.StatusInternalServerError, "密码验证失败", err.Error())
		return
	}

	response.Success(ctx, "密码验证完成", result)
}

// CheckPasswordStatus 检查密码状态
// @Summary 检查密码状态
// @Description 检查当前用户密码状态（是否需要修改）
// @Tags 密码管理
// @Accept json
// @Produce json
// @Success 200 {object} response.Response{data=object{need_change=bool,days_remaining=int}}
// @Failure 500 {object} response.Response
// @Router /api/auth/password-status [get]
func (c *PasswordController) CheckPasswordStatus(ctx *gin.Context) {
	userID := middleware.GetUserID(ctx)

	status, err := c.passwordService.CheckPasswordStatus(ctx, userID)
	if err != nil {
		response.Error(ctx, http.StatusInternalServerError, "检查密码状态失败", err.Error())
		return
	}

	response.Success(ctx, "检查密码状态成功", status)
}

// UpdatePasswordPolicy 更新密码策略
// @Summary 更新密码策略
// @Description 管理员更新系统密码策略配置
// @Tags 密码管理
// @Accept json
// @Produce json
// @Param policy body model.PasswordPolicy true "密码策略"
// @Success 200 {object} response.Response{data=model.PasswordPolicy}
// @Failure 400 {object} response.Response
// @Failure 500 {object} response.Response
// @Router /api/auth/admin/password-policy [put]
func (c *PasswordController) UpdatePasswordPolicy(ctx *gin.Context) {
	var policy model.PasswordPolicy

	if err := ctx.ShouldBindJSON(&policy); err != nil {
		response.Error(ctx, http.StatusBadRequest, "请求参数错误", err.Error())
		return
	}

	err := c.passwordService.UpdatePasswordPolicy(&policy)
	if err != nil {
		response.Error(ctx, http.StatusInternalServerError, "更新密码策略失败", err.Error())
		return
	}

	response.Success(ctx, "密码策略更新成功", nil)
}