package tools

import (
	"context"
	"encoding/json"
	"fmt"

	"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 RepoUpdate struct {
	c *gitea.Client
	a *allowlist.Allowlist
}

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

func (t *RepoUpdate) Descriptor() registry.ToolDescriptor {
	return registry.ToolDescriptor{
		Name: "repo_update",
		Description: "Update repository metadata via PATCH (archived, description, private, website, template). " +
			"Only fields explicitly set in the call are patched. " +
			"WARNING: private=false exposes the repo publicly — verify intent before calling.",
		InputSchema: json.RawMessage(`{
			"type":"object",
			"properties":{
				"owner":{"type":"string"},
				"name":{"type":"string"},
				"archived":{"type":"boolean","description":"Mark repo as archived (read-only). Reversible."},
				"description":{"type":"string"},
				"private":{"type":"boolean","description":"Toggle visibility. false makes the repo public."},
				"website":{"type":"string","description":"Homepage URL"},
				"template":{"type":"boolean","description":"Toggle template-repo flag"}
			},
			"required":["owner","name"]
		}`),
	}
}

type repoUpdateArgs struct {
	Owner       string  `json:"owner"`
	Name        string  `json:"name"`
	Archived    *bool   `json:"archived,omitempty"`
	Description *string `json:"description,omitempty"`
	Private     *bool   `json:"private,omitempty"`
	Website     *string `json:"website,omitempty"`
	Template    *bool   `json:"template,omitempty"`
}

func (t *RepoUpdate) Call(ctx context.Context, raw json.RawMessage) (json.RawMessage, error) {
	var args repoUpdateArgs
	if err := parseArgs(raw, &args); err != nil {
		return nil, err
	}
	if err := t.a.Check(args.Owner); err != nil {
		return nil, err
	}
	if args.Name == "" {
		return nil, fmt.Errorf("name required: %w", gitea.ErrValidation)
	}
	if args.Archived == nil && args.Description == nil && args.Private == nil &&
		args.Website == nil && args.Template == nil {
		return nil, fmt.Errorf("at least one updatable field must be set: %w", gitea.ErrValidation)
	}

	updated, err := t.c.EditRepo(ctx, args.Owner, args.Name, gitea.EditRepoArgs{
		Archived:    args.Archived,
		Description: args.Description,
		Private:     args.Private,
		Website:     args.Website,
		Template:    args.Template,
	})
	if err != nil {
		return nil, fmt.Errorf("edit repo: %w", err)
	}
	return textOK(updated)
}