// Copyright 2025 eat-pray-ai & OpenWaygate
// SPDX-License-Identifier: Apache-2.0

package subscription

import (
	"encoding/json"
	"io"

	cobramcp "github.com/eat-pray-ai/cobra-mcp"
	"github.com/eat-pray-ai/yutu/cmd"
	"github.com/eat-pray-ai/yutu/pkg"
	"github.com/eat-pray-ai/yutu/pkg/subscription"
	"github.com/eat-pray-ai/yutu/pkg/utils"
	"github.com/google/jsonschema-go/jsonschema"
	"github.com/modelcontextprotocol/go-sdk/mcp"
	"github.com/spf13/cobra"
)

const (
	listTool     = "subscription-list"
	listIdsUsage = "Return the subscriptions with the given ids for Stubby or Apiary"
	listCidUsage = "Return the subscriptions of the given channel owner"
	listShort    = "List subscription information"
	listLong     = "List subscription information. Use this tool to list subscription information."
	listExample  = `# List my subscriptions
yutu subscription list --mine
# List subscriptions by channel ID with limit
yutu subscription list --channelId UC_x5XG1OV2P6uZZ5FSM9Ttw --maxResults 10
# List specific subscriptions in JSON format
yutu subscription list --ids abc123,def456 --output json
# List subscriptions for a channel alphabetically
yutu subscription list --forChannelId UC_x5XG1OV2P6uZZ5FSM9Ttw --order alphabetical`
)

var listInSchema = &jsonschema.Schema{
	Type:     "object",
	Required: []string{},
	Properties: map[string]*jsonschema.Schema{
		"ids": {
			Type: "array", Description: listIdsUsage,
			Items: &jsonschema.Schema{Type: "string"},
		},
		"channel_id":     {Type: "string", Description: listCidUsage},
		"for_channel_id": {Type: "string", Description: fcidUsage},
		"max_results": {
			Type: "number", Description: pkg.MRUsage,
			Default: json.RawMessage("5"),
			Minimum: new(float64(0)),
		},
		"mine": {
			Type: "boolean", Description: mineUsage,
		},
		"my_recent_subscribers": {
			Type: "boolean", Description: mrsUsage,
		},
		"my_subscribers": {
			Type: "boolean", Description: msUsage,
		},
		"on_behalf_of_content_owner": {
			Type:        "string",
			Description: pkg.OBOCOUsage,
		},
		"on_behalf_of_content_owner_channel": {
			Type:        "string",
			Description: pkg.OBOCOCUsage,
		},
		"order": {
			Type: "string", Description: orderUsage,
			Enum: []any{
				"subscriptionOrderUnspecified", "relevance", "unread", "alphabetical",
			},
			Default: json.RawMessage(`"relevance"`),
		},
		"parts": {
			Type: "array", Description: pkg.PartsUsage,
			Items:   &jsonschema.Schema{Type: "string"},
			Default: json.RawMessage(`["id","snippet"]`),
		},
		"output": {
			Type: "string", Enum: []any{"json", "yaml", "table"},
			Description: pkg.TableUsage, Default: json.RawMessage(`"yaml"`),
		},
	},
}

func init() {
	mcp.AddTool(
		cmd.Server, &mcp.Tool{
			Name: listTool, Title: listShort, Description: listLong,
			InputSchema: listInSchema, Annotations: &mcp.ToolAnnotations{
				DestructiveHint: new(false),
				IdempotentHint:  true,
				OpenWorldHint:   new(true),
				ReadOnlyHint:    true,
			},
		}, cobramcp.GenToolHandler(
			listTool, func(input subscription.Subscription, writer io.Writer) error {
				return input.List(writer)
			},
		),
	)
	subscriptionCmd.AddCommand(listCmd)

	listCmd.Flags().StringSliceVarP(&ids, "ids", "i", []string{}, listIdsUsage)
	listCmd.Flags().StringVarP(&channelId, "channelId", "c", "", listCidUsage)
	listCmd.Flags().StringVarP(&forChannelId, "forChannelId", "C", "", fcidUsage)
	listCmd.Flags().Int64VarP(&maxResults, "maxResults", "n", 5, pkg.MRUsage)
	listCmd.Flags().BoolVarP(mine, "mine", "M", true, mineUsage)
	listCmd.Flags().BoolVarP(
		myRecentSubscribers, "myRecentSubscribers", "R", false, mrsUsage,
	)
	listCmd.Flags().BoolVarP(mySubscribers, "mySubscribers", "S", false, msUsage)
	listCmd.Flags().StringVarP(
		&onBehalfOfContentOwner, "onBehalfOfContentOwner", "b", "", pkg.OBOCOUsage,
	)
	listCmd.Flags().StringVarP(
		&onBehalfOfContentOwnerChannel, "onBehalfOfContentOwnerChannel", "B", "",
		pkg.OBOCOCUsage,
	)
	listCmd.Flags().StringVarP(&order, "order", "O", "relevance", orderUsage)
	listCmd.Flags().StringSliceVarP(
		&parts, "parts", "p", []string{"id", "snippet"}, pkg.PartsUsage,
	)
	listCmd.Flags().StringP("output", "o", "table", pkg.TableUsage)
}

var listCmd = &cobra.Command{
	Use:     "list",
	Short:   listShort,
	Long:    listLong,
	Example: listExample,
	Run: func(cmd *cobra.Command, args []string) {
		output, _ := cmd.Flags().GetString("output")
		input := subscription.NewSubscription(
			subscription.WithIds(ids),
			subscription.WithChannelId(channelId),
			subscription.WithForChannelId(forChannelId),
			subscription.WithMaxResults(maxResults),
			subscription.WithMine(mine),
			subscription.WithMyRecentSubscribers(myRecentSubscribers),
			subscription.WithMySubscribers(mySubscribers),
			subscription.WithOnBehalfOfContentOwner(onBehalfOfContentOwner),
			subscription.WithOnBehalfOfContentOwnerChannel(onBehalfOfContentOwnerChannel),
			subscription.WithOrder(order),
			subscription.WithParts(parts),
			subscription.WithOutput(output),
		)
		utils.HandleCmdError(input.List(cmd.OutOrStdout()), cmd)
	},
}
