package admin

import (
	"strconv"

	"github.com/gofiber/fiber/v2"

	"github.com/break/junhong_cmp_fiber/pkg/errors"
	"github.com/break/junhong_cmp_fiber/pkg/response"

	"github.com/break/junhong_cmp_fiber/internal/model"
	roleService "github.com/break/junhong_cmp_fiber/internal/service/role"
)

// RoleHandler 角色 Handler
type RoleHandler struct {
	service *roleService.Service
}

// NewRoleHandler 创建角色 Handler
func NewRoleHandler(service *roleService.Service) *RoleHandler {
	return &RoleHandler{service: service}
}

// Create 创建角色
// POST /api/v1/roles
func (h *RoleHandler) Create(c *fiber.Ctx) error {
	var req model.CreateRoleRequest
	if err := c.BodyParser(&req); err != nil {
		return errors.New(errors.CodeInvalidParam, "请求参数解析失败")
	}

	role, err := h.service.Create(c.UserContext(), &req)
	if err != nil {
		return err
	}

	return response.Success(c, role)
}

// Get 获取角色详情
// GET /api/v1/roles/:id
func (h *RoleHandler) Get(c *fiber.Ctx) error {
	id, err := strconv.ParseUint(c.Params("id"), 10, 64)
	if err != nil {
		return errors.New(errors.CodeInvalidParam, "无效的角色 ID")
	}

	role, err := h.service.Get(c.UserContext(), uint(id))
	if err != nil {
		return err
	}

	return response.Success(c, role)
}

// Update 更新角色
// PUT /api/v1/roles/:id
func (h *RoleHandler) Update(c *fiber.Ctx) error {
	id, err := strconv.ParseUint(c.Params("id"), 10, 64)
	if err != nil {
		return errors.New(errors.CodeInvalidParam, "无效的角色 ID")
	}

	var req model.UpdateRoleRequest
	if err := c.BodyParser(&req); err != nil {
		return errors.New(errors.CodeInvalidParam, "请求参数解析失败")
	}

	role, err := h.service.Update(c.UserContext(), uint(id), &req)
	if err != nil {
		return err
	}

	return response.Success(c, role)
}

// Delete 删除角色
// DELETE /api/v1/roles/:id
func (h *RoleHandler) Delete(c *fiber.Ctx) error {
	id, err := strconv.ParseUint(c.Params("id"), 10, 64)
	if err != nil {
		return errors.New(errors.CodeInvalidParam, "无效的角色 ID")
	}

	if err := h.service.Delete(c.UserContext(), uint(id)); err != nil {
		return err
	}

	return response.Success(c, nil)
}

// List 查询角色列表
// GET /api/v1/roles
func (h *RoleHandler) List(c *fiber.Ctx) error {
	var req model.RoleListRequest
	if err := c.QueryParser(&req); err != nil {
		return errors.New(errors.CodeInvalidParam, "请求参数解析失败")
	}

	roles, total, err := h.service.List(c.UserContext(), &req)
	if err != nil {
		return err
	}

	return response.SuccessWithPagination(c, roles, total, req.Page, req.PageSize)
}

// AssignPermissions 为角色分配权限
// POST /api/v1/roles/:id/permissions
func (h *RoleHandler) AssignPermissions(c *fiber.Ctx) error {
	id, err := strconv.ParseUint(c.Params("id"), 10, 64)
	if err != nil {
		return errors.New(errors.CodeInvalidParam, "无效的角色 ID")
	}

	var req model.AssignPermissionsRequest
	if err := c.BodyParser(&req); err != nil {
		return errors.New(errors.CodeInvalidParam, "请求参数解析失败")
	}

	rps, err := h.service.AssignPermissions(c.UserContext(), uint(id), req.PermIDs)
	if err != nil {
		return err
	}

	return response.Success(c, rps)
}

// GetPermissions 获取角色的所有权限
// GET /api/v1/roles/:id/permissions
func (h *RoleHandler) GetPermissions(c *fiber.Ctx) error {
	id, err := strconv.ParseUint(c.Params("id"), 10, 64)
	if err != nil {
		return errors.New(errors.CodeInvalidParam, "无效的角色 ID")
	}

	permissions, err := h.service.GetPermissions(c.UserContext(), uint(id))
	if err != nil {
		return err
	}

	return response.Success(c, permissions)
}

// RemovePermission 移除角色的权限
// DELETE /api/v1/roles/:role_id/permissions/:perm_id
func (h *RoleHandler) RemovePermission(c *fiber.Ctx) error {
	roleID, err := strconv.ParseUint(c.Params("role_id"), 10, 64)
	if err != nil {
		return errors.New(errors.CodeInvalidParam, "无效的角色 ID")
	}

	permID, err := strconv.ParseUint(c.Params("perm_id"), 10, 64)
	if err != nil {
		return errors.New(errors.CodeInvalidParam, "无效的权限 ID")
	}

	if err := h.service.RemovePermission(c.UserContext(), uint(roleID), uint(permID)); err != nil {
		return err
	}

	return response.Success(c, nil)
}

// UpdateStatus 更新角色状态
// PUT /api/v1/roles/:id/status
func (h *RoleHandler) UpdateStatus(c *fiber.Ctx) error {
	id, err := strconv.ParseUint(c.Params("id"), 10, 64)
	if err != nil {
		return errors.New(errors.CodeInvalidParam, "无效的角色 ID")
	}

	var req model.UpdateRoleStatusRequest
	if err := c.BodyParser(&req); err != nil {
		return errors.New(errors.CodeInvalidParam, "请求参数解析失败")
	}

	if err := h.service.UpdateStatus(c.UserContext(), uint(id), req.Status); err != nil {
		return err
	}

	return response.Success(c, nil)
}