package qq

import (
	"context"
	"encoding/json"
	"fmt"
	"net/http"
	"time"

	"git.yeij.top/AskaEth/Cyrene/platform-bridge/internal/bridge"
)

// ListChannels implements bridge.ChannelLister — fetches groups + friends from NapCat.
func (a *Adapter) ListChannels() []bridge.ChannelInfo {
	var all []bridge.ChannelInfo
	all = append(all, a.FetchGroups()...)
	all = append(all, a.FetchFriends()...)
	return all
}

// FetchGroups fetches the group list from NapCat HTTP API and caches group names.
// Returns a list of channel info for all groups the bot is in.
func (a *Adapter) FetchGroups() []bridge.ChannelInfo {
	if a.mode != "client" || a.remoteURL == "" {
		return nil
	}
	httpBase := a.httpBase()
	if httpBase == "" {
		return nil
	}

	url := fmt.Sprintf("%s/get_group_list", httpBase)
	if a.accessToken != "" {
		url += "?access_token=" + a.accessToken
	}

	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()
	req, err := http.NewRequestWithContext(ctx, "GET", url, nil)
	if err != nil {
		fmt.Printf("[qq:%s] get_group_list request failed: %v\n", a.configName, err)
		return nil
	}
	resp, err := http.DefaultClient.Do(req)
	if err != nil {
		fmt.Printf("[qq:%s] get_group_list failed: %v\n", a.configName, err)
		return nil
	}
	defer resp.Body.Close()

	var result struct {
		Data []struct {
			GroupID   int64  `json:"group_id"`
			GroupName string `json:"group_name"`
		} `json:"data"`
	}
	if err := json.NewDecoder(resp.Body).Decode(&result); err != nil {
		fmt.Printf("[qq:%s] get_group_list parse failed: %v\n", a.configName, err)
		return nil
	}

	var channels []bridge.ChannelInfo
	for _, g := range result.Data {
		if g.GroupName != "" {
			a.SetGroupName(g.GroupID, g.GroupName)
		}
		channels = append(channels, bridge.ChannelInfo{
			Platform:    "obv11",
			ChannelType: "group",
			ChannelID:   fmt.Sprintf("%d", g.GroupID),
			ChannelName: g.GroupName,
		})
	}
	fmt.Printf("[qq:%s] 获取到 %d 个群聊\n", a.configName, len(channels))
	return channels
}

// FetchFriends fetches the friend list from NapCat HTTP API.
// Returns a list of channel info for private chats.
func (a *Adapter) FetchFriends() []bridge.ChannelInfo {
	if a.mode != "client" || a.remoteURL == "" {
		return nil
	}
	httpBase := a.httpBase()
	if httpBase == "" {
		return nil
	}

	url := fmt.Sprintf("%s/get_friend_list", httpBase)
	if a.accessToken != "" {
		url += "?access_token=" + a.accessToken
	}

	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()
	req, err := http.NewRequestWithContext(ctx, "GET", url, nil)
	if err != nil {
		fmt.Printf("[qq:%s] get_friend_list request failed: %v\n", a.configName, err)
		return nil
	}
	resp, err := http.DefaultClient.Do(req)
	if err != nil {
		fmt.Printf("[qq:%s] get_friend_list failed: %v\n", a.configName, err)
		return nil
	}
	defer resp.Body.Close()

	var result struct {
		Data []struct {
			UserID   int64  `json:"user_id"`
			Nickname string `json:"nickname"`
			Remark   string `json:"remark"`
		} `json:"data"`
	}
	if err := json.NewDecoder(resp.Body).Decode(&result); err != nil {
		fmt.Printf("[qq:%s] get_friend_list parse failed: %v\n", a.configName, err)
		return nil
	}

	var channels []bridge.ChannelInfo
	for _, f := range result.Data {
		name := f.Remark
		if name == "" {
			name = f.Nickname
		}
		channels = append(channels, bridge.ChannelInfo{
			Platform:    "obv11",
			ChannelType: "private",
			ChannelID:   fmt.Sprintf("%d", f.UserID),
			ChannelName: name,
		})
	}
	fmt.Printf("[qq:%s] 获取到 %d 个好友\n", a.configName, len(channels))
	return channels
}