package repo

import (
	"context"
	"errors"
	"fmt"

	"git.lethalbits.com/lethalbits/gitea-mcp-extended/pkg/gitea"
	"git.lethalbits.com/lethalbits/gitea-mcp-extended/pkg/log"
	"git.lethalbits.com/lethalbits/gitea-mcp-extended/pkg/to"

	gitea_sdk "code.gitea.io/sdk/gitea"
	"github.com/mark3labs/mcp-go/mcp"
	"github.com/mark3labs/mcp-go/server"
)

const (
	CreatePushMirrorToolName          = "create_push_mirror"
	ListPushMirrorsToolName           = "list_push_mirrors"
	GetPushMirrorByRemoteNameToolName = "get_push_mirror"
	DeletePushMirrorToolName          = "delete_push_mirror"
)

var (
	CreatePushMirrorTool = mcp.NewTool(
		CreatePushMirrorToolName,
		mcp.WithDescription("Create a push mirror for a repository"),
		mcp.WithString("owner", mcp.Required(), mcp.Description("repository owner")),
		mcp.WithString("repo", mcp.Required(), mcp.Description("repository name")),
		mcp.WithString("remote_address", mcp.Required(), mcp.Description("remote git URL to push to")),
		mcp.WithString("remote_username", mcp.Description("remote username for authentication")),
		mcp.WithString("remote_password", mcp.Description("remote password/token for authentication")),
		mcp.WithString("interval", mcp.Description("sync interval (e.g., 8h0m0s)")),
		mcp.WithBoolean("sync_on_commit", mcp.Description("sync on commit")),
	)

	ListPushMirrorsTool = mcp.NewTool(
		ListPushMirrorsToolName,
		mcp.WithDescription("List push mirrors for a repository"),
		mcp.WithString("owner", mcp.Required(), mcp.Description("repository owner")),
		mcp.WithString("repo", mcp.Required(), mcp.Description("repository name")),
	)

	GetPushMirrorByRemoteNameTool = mcp.NewTool(
		GetPushMirrorByRemoteNameToolName,
		mcp.WithDescription("Get a push mirror by remote name"),
		mcp.WithString("owner", mcp.Required(), mcp.Description("repository owner")),
		mcp.WithString("repo", mcp.Required(), mcp.Description("repository name")),
		mcp.WithString("remote_name", mcp.Required(), mcp.Description("remote name")),
	)

	DeletePushMirrorTool = mcp.NewTool(
		DeletePushMirrorToolName,
		mcp.WithDescription("Delete a push mirror by remote name"),
		mcp.WithString("owner", mcp.Required(), mcp.Description("repository owner")),
		mcp.WithString("repo", mcp.Required(), mcp.Description("repository name")),
		mcp.WithString("remote_name", mcp.Required(), mcp.Description("remote name to delete")),
	)
)

func init() {
	Tool.RegisterRead(server.ServerTool{Tool: ListPushMirrorsTool, Handler: ListPushMirrorsFn})
	Tool.RegisterRead(server.ServerTool{Tool: GetPushMirrorByRemoteNameTool, Handler: GetPushMirrorByRemoteNameFn})
	Tool.RegisterWrite(server.ServerTool{Tool: CreatePushMirrorTool, Handler: CreatePushMirrorFn})
	Tool.RegisterWrite(server.ServerTool{Tool: DeletePushMirrorTool, Handler: DeletePushMirrorFn})
}

func CreatePushMirrorFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallToolResult, error) {
	log.Debugf("Called CreatePushMirrorFn")
	owner, _ := req.GetArguments()["owner"].(string)
	repo, _ := req.GetArguments()["repo"].(string)
	remoteAddr, _ := req.GetArguments()["remote_address"].(string)
	if owner == "" || repo == "" || remoteAddr == "" {
		return to.ErrorResult(errors.New("owner, repo, and remote_address are required"))
	}
	opt := gitea_sdk.CreatePushMirrorOption{
		RemoteAddress: remoteAddr,
	}
	if v, ok := req.GetArguments()["remote_username"].(string); ok {
		opt.RemoteUsername = v
	}
	if v, ok := req.GetArguments()["remote_password"].(string); ok {
		opt.RemotePassword = v
	}
	if v, ok := req.GetArguments()["interval"].(string); ok {
		opt.Interval = v
	}
	if v, ok := req.GetArguments()["sync_on_commit"].(bool); ok {
		opt.SyncONCommit = v
	}
	client, err := gitea.ClientFromContext(ctx)
	if err != nil {
		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
	}
	mirror, _, err := client.PushMirrors(owner, repo, opt)
	if err != nil {
		return to.ErrorResult(fmt.Errorf("create push mirror err: %v", err))
	}
	return to.TextResult(mirror)
}

func ListPushMirrorsFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallToolResult, error) {
	log.Debugf("Called ListPushMirrorsFn")
	owner, _ := req.GetArguments()["owner"].(string)
	repo, _ := req.GetArguments()["repo"].(string)
	if owner == "" || repo == "" {
		return to.ErrorResult(errors.New("owner and repo are required"))
	}
	client, err := gitea.ClientFromContext(ctx)
	if err != nil {
		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
	}
	mirrors, _, err := client.ListPushMirrors(owner, repo, gitea_sdk.ListOptions{})
	if err != nil {
		return to.ErrorResult(fmt.Errorf("list push mirrors err: %v", err))
	}
	return to.TextResult(mirrors)
}

func GetPushMirrorByRemoteNameFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallToolResult, error) {
	log.Debugf("Called GetPushMirrorByRemoteNameFn")
	owner, _ := req.GetArguments()["owner"].(string)
	repo, _ := req.GetArguments()["repo"].(string)
	remoteName, _ := req.GetArguments()["remote_name"].(string)
	if owner == "" || repo == "" || remoteName == "" {
		return to.ErrorResult(errors.New("owner, repo, and remote_name are required"))
	}
	client, err := gitea.ClientFromContext(ctx)
	if err != nil {
		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
	}
	mirror, _, err := client.GetPushMirrorByRemoteName(owner, repo, remoteName)
	if err != nil {
		return to.ErrorResult(fmt.Errorf("get push mirror err: %v", err))
	}
	return to.TextResult(mirror)
}

func DeletePushMirrorFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallToolResult, error) {
	log.Debugf("Called DeletePushMirrorFn")
	owner, _ := req.GetArguments()["owner"].(string)
	repo, _ := req.GetArguments()["repo"].(string)
	remoteName, _ := req.GetArguments()["remote_name"].(string)
	if owner == "" || repo == "" || remoteName == "" {
		return to.ErrorResult(errors.New("owner, repo, and remote_name are required"))
	}
	client, err := gitea.ClientFromContext(ctx)
	if err != nil {
		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
	}
	_, err = client.DeletePushMirror(owner, repo, remoteName)
	if err != nil {
		return to.ErrorResult(fmt.Errorf("delete push mirror err: %v", err))
	}
	return to.TextResult(map[string]string{"status": "deleted"})
}