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

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

func (t *RepoList) Descriptor() registry.ToolDescriptor {
	return registry.ToolDescriptor{
		Name:        "repo_list",
		Description: "List repos for a given owner.",
		InputSchema: json.RawMessage(`{
			"type":"object",
			"properties":{
				"owner":{"type":"string"},
				"page":{"type":"integer","minimum":1},
				"limit":{"type":"integer","minimum":1,"maximum":50}
			},
			"required":["owner"]
		}`),
	}
}

type repoListArgs struct {
	Owner string `json:"owner"`
	Page  int    `json:"page"`
	Limit int    `json:"limit"`
}

func (t *RepoList) Call(ctx context.Context, raw json.RawMessage) (json.RawMessage, error) {
	var args repoListArgs
	if err := parseArgs(raw, &args); err != nil {
		return nil, err
	}
	if err := t.a.Check(args.Owner); err != nil {
		return nil, err
	}
	args.Limit = capLimit(args.Limit, 30)
	if args.Page < 1 {
		args.Page = 1
	}
	repos, err := t.c.ListRepos(ctx, args.Owner, args.Page, args.Limit)
	if err != nil {
		return nil, err
	}
	out := map[string]any{
		"repos": repos,
	}
	if len(repos) == args.Limit {
		out["next_page"] = args.Page + 1
	}
	return textOK(out)
}