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 RepoTree struct {
	c *gitea.Client
	a *allowlist.Allowlist
}

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

func (t *RepoTree) Descriptor() registry.ToolDescriptor {
	return registry.ToolDescriptor{
		Name:        "repo_tree",
		Description: "Get the full recursive file tree for a repo ref (branch, tag, or SHA).",
		InputSchema: json.RawMessage(`{
			"type":"object",
			"properties":{
				"owner":{"type":"string"},
				"name":{"type":"string"},
				"ref":{"type":"string","description":"Branch, tag, or commit SHA."}
			},
			"required":["owner","name","ref"]
		}`),
	}
}

type repoTreeArgs struct {
	Owner string `json:"owner"`
	Name  string `json:"name"`
	Ref   string `json:"ref"`
}

func (t *RepoTree) Call(ctx context.Context, raw json.RawMessage) (json.RawMessage, error) {
	var args repoTreeArgs
	if err := parseArgs(raw, &args); err != nil {
		return nil, err
	}
	if err := t.a.Check(args.Owner); err != nil {
		return nil, err
	}
	tree, err := t.c.GetTree(ctx, args.Owner, args.Name, args.Ref, true)
	if err != nil {
		return nil, err
	}
	return textOK(tree)
}