// SPDX-License-Identifier: EUPL-1.2

package agentic

import (
	"context"

	core "dappco.re/go/core"
)

func (s *PrepSubsystem) registerWorkspaceCommands() {
	c := s.Core()
	c.Command("workspace/list", core.Command{Description: "List all agent workspaces with status", Action: s.cmdWorkspaceList})
	c.Command("agentic:workspace/list", core.Command{Description: "List all agent workspaces with status", Action: s.cmdWorkspaceList})
	c.Command("workspace/clean", core.Command{Description: "Remove completed/failed/blocked workspaces", Action: s.cmdWorkspaceClean})
	c.Command("agentic:workspace/clean", core.Command{Description: "Remove completed/failed/blocked workspaces", Action: s.cmdWorkspaceClean})
	c.Command("workspace/dispatch", core.Command{Description: "Dispatch an agent to work on a repo task", Action: s.cmdWorkspaceDispatch})
	c.Command("agentic:workspace/dispatch", core.Command{Description: "Dispatch an agent to work on a repo task", Action: s.cmdWorkspaceDispatch})
	c.Command("workspace/watch", core.Command{Description: "Watch workspaces until they complete", Action: s.cmdWorkspaceWatch})
	c.Command("agentic:workspace/watch", core.Command{Description: "Watch workspaces until they complete", Action: s.cmdWorkspaceWatch})
	c.Command("watch", core.Command{Description: "Watch workspaces until they complete", Action: s.cmdWorkspaceWatch})
	c.Command("agentic:watch", core.Command{Description: "Watch workspaces until they complete", Action: s.cmdWorkspaceWatch})
}

func (s *PrepSubsystem) cmdWorkspaceList(_ core.Options) core.Result {
	statusFiles := WorkspaceStatusPaths()
	count := 0
	for _, sf := range statusFiles {
		workspaceDir := core.PathDir(sf)
		workspaceName := WorkspaceName(workspaceDir)
		result := ReadStatusResult(workspaceDir)
		workspaceStatus, ok := workspaceStatusValue(result)
		if !ok {
			continue
		}
		core.Print(nil, "  %-8s %-8s %-10s %s", workspaceStatus.Status, workspaceStatus.Agent, workspaceStatus.Repo, workspaceName)
		count++
	}
	if count == 0 {
		core.Print(nil, "  no workspaces")
	}
	return core.Result{OK: true}
}

func (s *PrepSubsystem) cmdWorkspaceClean(options core.Options) core.Result {
	workspaceRoot := WorkspaceRoot()
	filesystem := s.Core().Fs()
	filter := options.String("_arg")
	if filter == "" {
		filter = "all"
	}
	if !workspaceCleanFilterValid(filter) {
		core.Print(nil, "usage: core-agent workspace clean [all|completed|failed|blocked]")
		return core.Result{Value: core.E("agentic.cmdWorkspaceClean", core.Concat("unknown filter: ", filter), nil), OK: false}
	}

	statusFiles := WorkspaceStatusPaths()
	var toRemove []string

	for _, sf := range statusFiles {
		workspaceDir := core.PathDir(sf)
		workspaceName := WorkspaceName(workspaceDir)
		result := ReadStatusResult(workspaceDir)
		workspaceStatus, ok := workspaceStatusValue(result)
		if !ok {
			continue
		}
		status := workspaceStatus.Status

		switch filter {
		case "all":
			if status == "completed" || status == "failed" || status == "blocked" || status == "merged" || status == "ready-for-review" {
				toRemove = append(toRemove, workspaceName)
			}
		case "completed":
			if status == "completed" || status == "merged" || status == "ready-for-review" {
				toRemove = append(toRemove, workspaceName)
			}
		case "failed":
			if status == "failed" {
				toRemove = append(toRemove, workspaceName)
			}
		case "blocked":
			if status == "blocked" {
				toRemove = append(toRemove, workspaceName)
			}
		}
	}

	if len(toRemove) == 0 {
		core.Print(nil, "nothing to clean")
		return core.Result{OK: true}
	}

	for _, name := range toRemove {
		path := core.JoinPath(workspaceRoot, name)
		filesystem.DeleteAll(path)
		core.Print(nil, "  removed %s", name)
	}
	core.Print(nil, "\n  %d workspaces removed", len(toRemove))
	return core.Result{OK: true}
}

func workspaceCleanFilterValid(filter string) bool {
	switch filter {
	case "all", "completed", "failed", "blocked":
		return true
	default:
		return false
	}
}

// input := DispatchInput{Repo: "go-io", Task: "Fix the failing tests", Issue: 12}
func (s *PrepSubsystem) cmdWorkspaceDispatch(options core.Options) core.Result {
	input := workspaceDispatchInputFromOptions(options)
	if input.Repo == "" {
		core.Print(nil, "usage: core-agent workspace dispatch <repo> --task=\"...\" --issue=N|--pr=N|--branch=X [--agent=codex] [--template=coding] [--plan-template=bug-fix] [--persona=code/reviewer] [--tag=v0.8.0] [--dry-run]")
		return core.Result{Value: core.E("agentic.cmdWorkspaceDispatch", "repo is required", nil), OK: false}
	}

	_, out, err := s.dispatch(context.Background(), nil, input)
	if err != nil {
		core.Print(nil, "dispatch failed: %s", err.Error())
		return core.Result{Value: err, OK: false}
	}
	agent := out.Agent
	if agent == "" {
		agent = "codex"
	}
	core.Print(nil, "dispatched %s to %s", agent, input.Repo)
	if out.WorkspaceDir != "" {
		core.Print(nil, "  workspace: %s", out.WorkspaceDir)
	}
	if out.PID > 0 {
		core.Print(nil, "  pid:       %d", out.PID)
	}
	return core.Result{OK: true}
}

func (s *PrepSubsystem) cmdWorkspaceWatch(options core.Options) core.Result {
	watchOptions := core.NewOptions(options.Items()...)
	if watchOptions.String("workspace") == "" && len(optionStringSliceValue(watchOptions, "workspaces")) == 0 {
		if workspace := optionStringValue(options, "_arg"); workspace != "" {
			watchOptions.Set("workspace", workspace)
		}
	}
	input := watchInputFromOptions(watchOptions)

	_, output, err := s.watch(s.commandContext(), nil, input)
	if err != nil {
		core.Print(nil, "error: %v", err)
		return core.Result{Value: err, OK: false}
	}

	core.Print(nil, "completed: %d", len(output.Completed))
	core.Print(nil, "failed:    %d", len(output.Failed))
	core.Print(nil, "duration:  %s", output.Duration)
	return core.Result{Value: output, OK: output.Success}
}

func workspaceDispatchInputFromOptions(options core.Options) DispatchInput {
	dispatchOptions := core.NewOptions(options.Items()...)
	if dispatchOptions.String("repo") == "" {
		if repo := optionStringValue(options, "_arg", "repo"); repo != "" {
			dispatchOptions.Set("repo", repo)
		}
	}
	return dispatchInputFromOptions(dispatchOptions)
}