package organization

import (
	"context"
	"errors"
	"fmt"

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

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

var Tool = tool.New()

const (
	ListOrgsToolName  = "list_orgs"
	GetOrgToolName    = "get_org"
	CreateOrgToolName = "create_org"
	EditOrgToolName   = "edit_org"
	DeleteOrgToolName = "delete_org"
	RenameOrgToolName = "rename_org"
	ListOrgReposToolName = "list_org_repos"
	CreateOrgRepoToolName = "create_org_repo"
)

var (
	ListOrgsTool = mcp.NewTool(
		ListOrgsToolName,
		mcp.WithDescription("List all visible organizations"),
		mcp.WithNumber("page", mcp.Description("page number"), mcp.DefaultNumber(1)),
		mcp.WithNumber("pageSize", mcp.Description("page size"), mcp.DefaultNumber(100)),
	)

	GetOrgTool = mcp.NewTool(
		GetOrgToolName,
		mcp.WithDescription("Get an organization by name"),
		mcp.WithString("org", mcp.Required(), mcp.Description("organization name")),
	)

	CreateOrgTool = mcp.NewTool(
		CreateOrgToolName,
		mcp.WithDescription("Create an organization"),
		mcp.WithString("username", mcp.Required(), mcp.Description("organization username")),
		mcp.WithString("full_name", mcp.Description("organization full name")),
		mcp.WithString("description", mcp.Description("organization description")),
		mcp.WithString("website", mcp.Description("organization website")),
		mcp.WithString("location", mcp.Description("organization location")),
		mcp.WithString("visibility", mcp.Description("visibility: public, limited, or private"), mcp.DefaultString("public")),
	)

	EditOrgTool = mcp.NewTool(
		EditOrgToolName,
		mcp.WithDescription("Edit an organization"),
		mcp.WithString("org", mcp.Required(), mcp.Description("organization name")),
		mcp.WithString("full_name", mcp.Description("organization full name")),
		mcp.WithString("description", mcp.Description("organization description")),
		mcp.WithString("website", mcp.Description("organization website")),
		mcp.WithString("location", mcp.Description("organization location")),
		mcp.WithString("visibility", mcp.Description("visibility: public, limited, or private")),
	)

	DeleteOrgTool = mcp.NewTool(
		DeleteOrgToolName,
		mcp.WithDescription("Delete an organization"),
		mcp.WithString("org", mcp.Required(), mcp.Description("organization name")),
	)

	RenameOrgTool = mcp.NewTool(
		RenameOrgToolName,
		mcp.WithDescription("Rename an organization"),
		mcp.WithString("org", mcp.Required(), mcp.Description("current organization name")),
		mcp.WithString("new_name", mcp.Required(), mcp.Description("new organization name")),
	)

	ListOrgReposTool = mcp.NewTool(
		ListOrgReposToolName,
		mcp.WithDescription("List an organization's repositories"),
		mcp.WithString("org", mcp.Required(), mcp.Description("organization name")),
		mcp.WithNumber("page", mcp.Description("page number"), mcp.DefaultNumber(1)),
		mcp.WithNumber("pageSize", mcp.Description("page size"), mcp.DefaultNumber(100)),
	)

	CreateOrgRepoTool = mcp.NewTool(
		CreateOrgRepoToolName,
		mcp.WithDescription("Create a repository in an organization"),
		mcp.WithString("org", mcp.Required(), mcp.Description("organization name")),
		mcp.WithString("name", mcp.Required(), mcp.Description("repository name")),
		mcp.WithString("description", mcp.Description("repository description")),
		mcp.WithBoolean("private", mcp.Description("whether the repository is private")),
		mcp.WithBoolean("auto_init", mcp.Description("whether to auto-initialize with README")),
		mcp.WithString("default_branch", mcp.Description("default branch name")),
		mcp.WithString("gitignores", mcp.Description("gitignore template")),
		mcp.WithString("license", mcp.Description("license template")),
	)
)

func init() {
	Tool.RegisterRead(server.ServerTool{Tool: ListOrgsTool, Handler: ListOrgsFn})
	Tool.RegisterRead(server.ServerTool{Tool: GetOrgTool, Handler: GetOrgFn})
	Tool.RegisterRead(server.ServerTool{Tool: ListOrgReposTool, Handler: ListOrgReposFn})
	Tool.RegisterWrite(server.ServerTool{Tool: CreateOrgTool, Handler: CreateOrgFn})
	Tool.RegisterWrite(server.ServerTool{Tool: EditOrgTool, Handler: EditOrgFn})
	Tool.RegisterWrite(server.ServerTool{Tool: DeleteOrgTool, Handler: DeleteOrgFn})
	Tool.RegisterWrite(server.ServerTool{Tool: RenameOrgTool, Handler: RenameOrgFn})
	Tool.RegisterWrite(server.ServerTool{Tool: CreateOrgRepoTool, Handler: CreateOrgRepoFn})
}

func ListOrgsFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallToolResult, error) {
	log.Debugf("Called ListOrgsFn")
	page := params.GetOptionalInt(req.GetArguments(), "page", 1)
	pageSize := params.GetOptionalInt(req.GetArguments(), "pageSize", 100)
	client, err := gitea.ClientFromContext(ctx)
	if err != nil {
		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
	}
	orgs, _, err := client.ListOrgs(gitea_sdk.ListOrgsOptions{
		ListOptions: gitea_sdk.ListOptions{Page: int(page), PageSize: int(pageSize)},
	})
	if err != nil {
		return to.ErrorResult(fmt.Errorf("list orgs err: %v", err))
	}
	return to.TextResult(orgs)
}

func GetOrgFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallToolResult, error) {
	log.Debugf("Called GetOrgFn")
	org, ok := req.GetArguments()["org"].(string)
	if !ok {
		return to.ErrorResult(errors.New("org is required"))
	}
	client, err := gitea.ClientFromContext(ctx)
	if err != nil {
		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
	}
	organization, _, err := client.GetOrg(org)
	if err != nil {
		return to.ErrorResult(fmt.Errorf("get org %s err: %v", org, err))
	}
	return to.TextResult(organization)
}

func CreateOrgFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallToolResult, error) {
	log.Debugf("Called CreateOrgFn")
	username, ok := req.GetArguments()["username"].(string)
	if !ok {
		return to.ErrorResult(errors.New("username is required"))
	}
	opt := gitea_sdk.CreateOrgOption{
		Name: username,
	}
	if v, ok := req.GetArguments()["full_name"].(string); ok {
		opt.FullName = v
	}
	if v, ok := req.GetArguments()["description"].(string); ok {
		opt.Description = v
	}
	if v, ok := req.GetArguments()["website"].(string); ok {
		opt.Website = v
	}
	if v, ok := req.GetArguments()["location"].(string); ok {
		opt.Location = v
	}
	if v, ok := req.GetArguments()["visibility"].(string); ok {
		opt.Visibility = gitea_sdk.VisibleType(v)
	}
	client, err := gitea.ClientFromContext(ctx)
	if err != nil {
		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
	}
	organization, _, err := client.CreateOrg(opt)
	if err != nil {
		return to.ErrorResult(fmt.Errorf("create org %s err: %v", username, err))
	}
	return to.TextResult(organization)
}

func EditOrgFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallToolResult, error) {
	log.Debugf("Called EditOrgFn")
	org, ok := req.GetArguments()["org"].(string)
	if !ok {
		return to.ErrorResult(errors.New("org is required"))
	}
	opt := gitea_sdk.EditOrgOption{}
	if v, ok := req.GetArguments()["full_name"].(string); ok {
		opt.FullName = v
	}
	if v, ok := req.GetArguments()["description"].(string); ok {
		opt.Description = v
	}
	if v, ok := req.GetArguments()["website"].(string); ok {
		opt.Website = v
	}
	if v, ok := req.GetArguments()["location"].(string); ok {
		opt.Location = v
	}
	if v, ok := req.GetArguments()["visibility"].(string); ok {
		opt.Visibility = gitea_sdk.VisibleType(v)
	}
	client, err := gitea.ClientFromContext(ctx)
	if err != nil {
		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
	}
	_, err = client.EditOrg(org, opt)
	if err != nil {
		return to.ErrorResult(fmt.Errorf("edit org %s err: %v", org, err))
	}
	updated, _, err := client.GetOrg(org)
	if err != nil {
		return to.ErrorResult(fmt.Errorf("get org %s after edit err: %v", org, err))
	}
	return to.TextResult(updated)
}

func DeleteOrgFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallToolResult, error) {
	log.Debugf("Called DeleteOrgFn")
	org, ok := req.GetArguments()["org"].(string)
	if !ok {
		return to.ErrorResult(errors.New("org is required"))
	}
	client, err := gitea.ClientFromContext(ctx)
	if err != nil {
		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
	}
	_, err = client.DeleteOrg(org)
	if err != nil {
		return to.ErrorResult(fmt.Errorf("delete org %s err: %v", org, err))
	}
	return to.TextResult(map[string]string{"status": "deleted", "org": org})
}

func RenameOrgFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallToolResult, error) {
	log.Debugf("Called RenameOrgFn")
	org, ok := req.GetArguments()["org"].(string)
	if !ok {
		return to.ErrorResult(errors.New("org is required"))
	}
	newName, ok := req.GetArguments()["new_name"].(string)
	if !ok {
		return to.ErrorResult(errors.New("new_name is required"))
	}
	client, err := gitea.ClientFromContext(ctx)
	if err != nil {
		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
	}
	_, err = client.RenameOrg(org, gitea_sdk.RenameOrgOption{NewName: newName})
	if err != nil {
		return to.ErrorResult(fmt.Errorf("rename org %s to %s err: %v", org, newName, err))
	}
	return to.TextResult(map[string]string{"status": "renamed", "old_name": org, "new_name": newName})
}

func ListOrgReposFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallToolResult, error) {
	log.Debugf("Called ListOrgReposFn")
	org, ok := req.GetArguments()["org"].(string)
	if !ok {
		return to.ErrorResult(errors.New("org is required"))
	}
	page := params.GetOptionalInt(req.GetArguments(), "page", 1)
	pageSize := params.GetOptionalInt(req.GetArguments(), "pageSize", 100)
	client, err := gitea.ClientFromContext(ctx)
	if err != nil {
		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
	}
	repos, _, err := client.ListOrgRepos(org, gitea_sdk.ListOrgReposOptions{
		ListOptions: gitea_sdk.ListOptions{Page: int(page), PageSize: int(pageSize)},
	})
	if err != nil {
		return to.ErrorResult(fmt.Errorf("list org %s repos err: %v", org, err))
	}
	return to.TextResult(repos)
}

func CreateOrgRepoFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallToolResult, error) {
	log.Debugf("Called CreateOrgRepoFn")
	org, ok := req.GetArguments()["org"].(string)
	if !ok {
		return to.ErrorResult(errors.New("org is required"))
	}
	name, ok := req.GetArguments()["name"].(string)
	if !ok {
		return to.ErrorResult(errors.New("name is required"))
	}
	opt := gitea_sdk.CreateRepoOption{
		Name: name,
	}
	if v, ok := req.GetArguments()["description"].(string); ok {
		opt.Description = v
	}
	if v, ok := req.GetArguments()["private"].(bool); ok {
		opt.Private = v
	}
	if v, ok := req.GetArguments()["auto_init"].(bool); ok {
		opt.AutoInit = v
	}
	if v, ok := req.GetArguments()["default_branch"].(string); ok {
		opt.DefaultBranch = v
	}
	if v, ok := req.GetArguments()["gitignores"].(string); ok {
		opt.Gitignores = v
	}
	if v, ok := req.GetArguments()["license"].(string); ok {
		opt.License = v
	}
	client, err := gitea.ClientFromContext(ctx)
	if err != nil {
		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
	}
	repo, _, err := client.CreateOrgRepo(org, opt)
	if err != nil {
		return to.ErrorResult(fmt.Errorf("create repo %s/%s err: %v", org, name, err))
	}
	return to.TextResult(repo)
}