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"

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

const (
	ListOrgBlocksToolName  = "list_org_blocks"
	CheckOrgBlockToolName  = "check_org_block"
	BlockOrgUserToolName   = "block_org_user"
	UnblockOrgUserToolName = "unblock_org_user"
)

var (
	ListOrgBlocksTool = mcp.NewTool(
		ListOrgBlocksToolName,
		mcp.WithDescription("List users blocked by an organization"),
		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)),
	)

	CheckOrgBlockTool = mcp.NewTool(
		CheckOrgBlockToolName,
		mcp.WithDescription("Check if a user is blocked by an organization"),
		mcp.WithString("org", mcp.Required(), mcp.Description("organization name")),
		mcp.WithString("username", mcp.Required(), mcp.Description("username to check")),
	)

	BlockOrgUserTool = mcp.NewTool(
		BlockOrgUserToolName,
		mcp.WithDescription("Block a user from an organization"),
		mcp.WithString("org", mcp.Required(), mcp.Description("organization name")),
		mcp.WithString("username", mcp.Required(), mcp.Description("username to block")),
	)

	UnblockOrgUserTool = mcp.NewTool(
		UnblockOrgUserToolName,
		mcp.WithDescription("Unblock a user from an organization"),
		mcp.WithString("org", mcp.Required(), mcp.Description("organization name")),
		mcp.WithString("username", mcp.Required(), mcp.Description("username to unblock")),
	)
)

func init() {
	Tool.RegisterRead(server.ServerTool{Tool: ListOrgBlocksTool, Handler: ListOrgBlocksFn})
	Tool.RegisterRead(server.ServerTool{Tool: CheckOrgBlockTool, Handler: CheckOrgBlockFn})
	Tool.RegisterWrite(server.ServerTool{Tool: BlockOrgUserTool, Handler: BlockOrgUserFn})
	Tool.RegisterWrite(server.ServerTool{Tool: UnblockOrgUserTool, Handler: UnblockOrgUserFn})
}

func ListOrgBlocksFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallToolResult, error) {
	log.Debugf("Called ListOrgBlocksFn")
	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))
	}
	users, _, err := client.ListOrgBlocks(org, gitea_sdk.ListOrgBlocksOptions{
		ListOptions: gitea_sdk.ListOptions{Page: int(page), PageSize: int(pageSize)},
	})
	if err != nil {
		return to.ErrorResult(fmt.Errorf("list org %s blocks err: %v", org, err))
	}
	return to.TextResult(users)
}

func CheckOrgBlockFn(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallToolResult, error) {
	log.Debugf("Called CheckOrgBlockFn")
	org, ok := req.GetArguments()["org"].(string)
	if !ok {
		return to.ErrorResult(errors.New("org is required"))
	}
	username, ok := req.GetArguments()["username"].(string)
	if !ok {
		return to.ErrorResult(errors.New("username is required"))
	}
	client, err := gitea.ClientFromContext(ctx)
	if err != nil {
		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
	}
	isBlocked, _, err := client.CheckOrgBlock(org, username)
	if err != nil {
		return to.ErrorResult(fmt.Errorf("check org %s block for %s err: %v", org, username, err))
	}
	return to.TextResult(map[string]any{"org": org, "username": username, "is_blocked": isBlocked})
}

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

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