package handlers

import (
	"fmt"
	"platform/web/auth"
	"platform/web/core"
	q "platform/web/queries"
	s "platform/web/services"
	"time"

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

// region ListChannels

type ListChannelsReq struct {
	core.PageReq
	AuthType     s.ChannelAuthType `json:"auth_type"`
	ExpireAfter  *time.Time        `json:"expire_after"`
	ExpireBefore *time.Time        `json:"expire_before"`
}

func ListChannels(c *fiber.Ctx) error {
	// 检查权限
	authContext, err := auth.Protect(c, []s.PayloadType{s.PayloadUser}, []string{})
	if err != nil {
		return err
	}

	// 解析请求参数
	req := new(ListChannelsReq)
	if err := c.BodyParser(req); err != nil {
		return err
	}

	// 构造查询条件
	cond := q.Channel.
		Where(q.Channel.UserID.Eq(authContext.Payload.Id))
	switch req.AuthType {
	case s.ChannelAuthTypeIp:
		cond.Where(q.Channel.AuthIP.Is(true))
	case s.ChannelAuthTypePass:
		cond.Where(q.Channel.AuthPass.Is(true))
	default:
		break
	}

	if req.ExpireAfter != nil {
		cond.Where(q.Channel.Expiration.Gte(core.LocalDateTime(*req.ExpireAfter)))
	}
	if req.ExpireBefore != nil {
		cond.Where(q.Channel.Expiration.Lte(core.LocalDateTime(*req.ExpireBefore)))
	}

	// 查询数据
	channels, err := q.Channel.Debug().
		Where(cond).
		Order(q.Channel.CreatedAt.Desc()).
		Offset(req.GetOffset()).
		Limit(req.GetLimit()).
		Find()
	if err != nil {
		return err
	}

	// 查询总量
	var total int64
	if len(channels) < req.GetLimit() {
		total = int64(len(channels) + req.GetOffset())
	} else {
		total, err = q.Channel.Where(cond).Count()
		if err != nil {
			return err
		}
	}

	// 返回结果
	return c.JSON(core.PageResp{
		Total: int(total),
		Page:  req.GetPage(),
		Size:  req.GetSize(),
		List:  channels,
	})
}

// endregion

// region CreateChannel

type CreateChannelReq struct {
	ResourceId int32             `json:"resource_id" validate:"required"`
	AuthType   s.ChannelAuthType `json:"auth_type" validate:"required"`
	Protocol   s.ChannelProtocol `json:"protocol" validate:"required"`
	Count      int               `json:"count" validate:"required"`
	Prov       string            `json:"prov"`
	City       string            `json:"city"`
	Isp        string            `json:"isp"`
}

func CreateChannel(c *fiber.Ctx) error {
	// 检查权限
	authContext, err := auth.Protect(c, []s.PayloadType{s.PayloadUser}, []string{})
	if err != nil {
		return err
	}
	// 获取用户信息
	user, err := q.User.
		Where(q.User.ID.Eq(authContext.Payload.Id)).
		Take()
	if err != nil {
		return err
	}
	if user.IDToken == "" {
		return fiber.NewError(fiber.StatusForbidden, "账号未实名")
	}

	count, err := q.Whitelist.Where(
		q.Whitelist.UserID.Eq(authContext.Payload.Id),
		q.Whitelist.Host.Eq(c.IP()),
	).Count()
	if err != nil {
		return err
	}
	if count == 0 {
		return fiber.NewError(fiber.StatusForbidden, fmt.Sprintf("非白名单IP %s", c.IP()))
	}

	req := new(CreateChannelReq)
	if err := c.BodyParser(req); err != nil {
		return err
	}

	var isp string
	switch req.Isp {
	case "1":
		isp = "电信"
	case "2":
		isp = "联通"
	case "3":
		isp = "移动"
	}

	result, err := s.Channel.CreateChannel(
		c.Context(),
		authContext,
		req.ResourceId,
		req.Protocol,
		req.AuthType,
		req.Count,
		s.NodeFilterConfig{
			Isp:  isp,
			Prov: req.Prov,
			City: req.City,
		},
	)
	if err != nil {
		return err
	}

	return c.JSON(result)
}

type CreateChannelResultType string

// endregion

// region RemoveChannels

type RemoveChannelsReq struct {
	ByIds []int32 `json:"by_ids" validate:"required"`
}

func RemoveChannels(c *fiber.Ctx) error {
	// 检查权限
	authCtx, err := auth.Protect(c, []s.PayloadType{
		s.PayloadUser,
		s.PayloadClientConfidential,
	}, []string{})
	if err != nil {
		return err
	}

	// 解析请求参数
	req := new(RemoveChannelsReq)
	if err := c.BodyParser(req); err != nil {
		return err
	}

	// 删除通道
	err = s.Channel.RemoveChannels(c.Context(), authCtx, req.ByIds...)
	if err != nil {
		return err
	}

	return c.SendStatus(fiber.StatusOK)
}

// endregion