package config_test

import (
	"fmt"
	"log"
	"os"
	"strings"
	"testing"

	"rickub.com/bots-garden/ori/internal/config"
)

func TestFromArgsDefaults(t *testing.T) {
	cfg, err := config.FromArgs(nil)
	if err != nil {
		t.Fatalf("FromArgs(nil) returned an error: %v", err)
	}
	if cfg.Addr != ":8888" {
		t.Errorf("default Addr = %q, want %q", cfg.Addr, ":8888")
	}
	wd, _ := os.Getwd()
	if cfg.Cwd != wd {
		t.Errorf("default Cwd = %q, want current directory %q", cfg.Cwd, wd)
	}
	want := strings.Fields(config.DefaultAgentCommand)
	if strings.Join(cfg.AgentCommand, " ") != strings.Join(want, " ") {
		t.Errorf("default AgentCommand = %v, want %v", cfg.AgentCommand, want)
	}
}

func TestFromArgsOverrides(t *testing.T) {
	dir := t.TempDir()
	cfg, err := config.FromArgs([]string{"--addr", ":9000", "--cwd", dir, "--agent-cmd", "gemini --experimental-acp"})
	if err != nil {
		t.Fatalf("FromArgs returned an error: %v", err)
	}
	if cfg.Addr != ":9000" {
		t.Errorf("Addr = %q, want %q", cfg.Addr, ":9000")
	}
	if cfg.Cwd != dir {
		t.Errorf("Cwd = %q, want %q", cfg.Cwd, dir)
	}
	if len(cfg.AgentCommand) != 2 || cfg.AgentCommand[0] != "gemini" || cfg.AgentCommand[1] != "--experimental-acp" {
		t.Errorf("AgentCommand = %v, want [gemini --experimental-acp]", cfg.AgentCommand)
	}
}

func TestFromArgsRejectsEmptyAgentCommand(t *testing.T) {
	if _, err := config.FromArgs([]string{"--agent-cmd", "  "}); err == nil {
		t.Fatal("FromArgs accepted an empty --agent-cmd, want an error")
	}
}

func TestFromArgsRejectsMissingCwd(t *testing.T) {
	if _, err := config.FromArgs([]string{"--cwd", "/does/not/exist"}); err == nil {
		t.Fatal("FromArgs accepted a non-existent --cwd, want an error")
	}
}

func TestFromArgsRejectsFileAsCwd(t *testing.T) {
	file := t.TempDir() + "/plain-file"
	if err := os.WriteFile(file, []byte("x"), 0o644); err != nil {
		t.Fatal(err)
	}
	if _, err := config.FromArgs([]string{"--cwd", file}); err == nil {
		t.Fatal("FromArgs accepted a plain file as --cwd, want an error")
	}
}

func TestFromArgsRejectsUnknownFlag(t *testing.T) {
	if _, err := config.FromArgs([]string{"--nope"}); err == nil {
		t.Fatal("FromArgs accepted an unknown flag, want an error")
	}
}

func ExampleFromArgs() {
	cfg, err := config.FromArgs([]string{"--addr", ":9000"})
	if err != nil {
		log.Fatal(err)
	}
	fmt.Println(cfg.Addr)
	// Output: :9000
}