package tools

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

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

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

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

func (t *IssueCreate) Descriptor() registry.ToolDescriptor {
	return registry.ToolDescriptor{
		Name:        "issue_create",
		Description: "Create an issue. Applies identity footer to body.",
		InputSchema: json.RawMessage(`{
			"type":"object",
			"properties":{
				"owner":{"type":"string"},
				"name":{"type":"string"},
				"title":{"type":"string"},
				"body":{"type":"string"},
				"labels":{"type":"array","items":{"type":"integer"}},
				"assignees":{"type":"array","items":{"type":"string"}},
				"milestone":{"type":"integer"}
			},
			"required":["owner","name","title"]
		}`),
	}
}

type issueCreateArgs struct {
	Owner     string   `json:"owner"`
	Name      string   `json:"name"`
	Title     string   `json:"title"`
	Body      string   `json:"body"`
	Labels    []int64  `json:"labels"`
	Assignees []string `json:"assignees"`
	Milestone int64    `json:"milestone"`
}

func (t *IssueCreate) Call(ctx context.Context, raw json.RawMessage) (json.RawMessage, error) {
	var args issueCreateArgs
	if err := parseArgs(raw, &args); err != nil {
		return nil, err
	}
	if err := t.a.Check(args.Owner); err != nil {
		return nil, err
	}
	if args.Title == "" {
		return nil, fmt.Errorf("title is required: %w", gitea.ErrValidation)
	}
	body := identity.ApplyFooter(args.Body, auth.Caller(ctx))

	iss, err := t.c.CreateIssue(ctx, args.Owner, args.Name, gitea.CreateIssueArgs{
		Title:     args.Title,
		Body:      body,
		Labels:    args.Labels,
		Assignees: args.Assignees,
		Milestone: args.Milestone,
	})
	if err != nil {
		return nil, err
	}

	return textOK(map[string]any{
		"number":   iss.Number,
		"title":    iss.Title,
		"html_url": iss.HTMLURL,
		"state":    iss.State,
	})
}