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

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

func (t *DirList) Descriptor() registry.ToolDescriptor {
	return registry.ToolDescriptor{
		Name:        "dir_list",
		Description: "List directory contents in a repository. Use empty path for repo root. Returns name, path, type (file/dir/symlink), sha, size per entry.",
		InputSchema: json.RawMessage(`{
			"type":"object",
			"properties":{
				"owner":{"type":"string"},
				"name":{"type":"string"},
				"path":{"type":"string"},
				"ref":{"type":"string"}
			},
			"required":["owner","name"]
		}`),
	}
}

type dirListArgs struct {
	Owner string `json:"owner"`
	Name  string `json:"name"`
	Path  string `json:"path"`
	Ref   string `json:"ref"`
}

func (t *DirList) Call(ctx context.Context, raw json.RawMessage) (json.RawMessage, error) {
	var args dirListArgs
	if err := parseArgs(raw, &args); err != nil {
		return nil, err
	}
	if err := t.a.Check(args.Owner); err != nil {
		return nil, err
	}

	entries, err := t.c.ListContents(ctx, args.Owner, args.Name, args.Path, args.Ref)
	if err != nil {
		return nil, err
	}

	result := make([]map[string]any, len(entries))
	for i, e := range entries {
		result[i] = map[string]any{
			"name": e.Name,
			"path": e.Path,
			"type": e.Type,
			"sha":  e.Sha,
			"size": e.Size,
		}
	}
	return textOK(result)
}