package tools

import (
	"context"
	"encoding/json"

	"gitea.d-ma.be/mathias/gitea-mcp/internal/allowlist"
	"gitea.d-ma.be/mathias/gitea-mcp/internal/gitea"
	"gitea.d-ma.be/mathias/gitea-mcp/internal/registry"
)

type RepoTopicsUpdate struct {
	c *gitea.Client
	a *allowlist.Allowlist
}

func NewRepoTopicsUpdate(c *gitea.Client, a *allowlist.Allowlist) *RepoTopicsUpdate {
	return &RepoTopicsUpdate{c: c, a: a}
}

func (t *RepoTopicsUpdate) Descriptor() registry.ToolDescriptor {
	return registry.ToolDescriptor{
		Name:        "repo_topics_update",
		Description: "Replace the topic list for a repository.",
		InputSchema: json.RawMessage(`{
			"type":"object",
			"properties":{
				"owner":{"type":"string"},
				"name":{"type":"string"},
				"topics":{"type":"array","items":{"type":"string"},"description":"Full replacement list. Send [] to clear all topics."}
			},
			"required":["owner","name","topics"]
		}`),
	}
}

type repoTopicsUpdateArgs struct {
	Owner  string   `json:"owner"`
	Name   string   `json:"name"`
	Topics []string `json:"topics"`
}

func (t *RepoTopicsUpdate) Call(ctx context.Context, raw json.RawMessage) (json.RawMessage, error) {
	var args repoTopicsUpdateArgs
	if err := parseArgs(raw, &args); err != nil {
		return nil, err
	}
	if err := t.a.Check(args.Owner); err != nil {
		return nil, err
	}
	if err := t.c.UpdateTopics(ctx, args.Owner, args.Name, args.Topics); err != nil {
		return nil, err
	}
	return textOK(map[string]any{"status": "updated", "topics": args.Topics})
}