package cmd

import (
	"bytes"
	"io"
	"os"
	"strings"
	"testing"

	"gitea.dcglab.co.uk/steve/arrman/sonarr"
)

type mockSonarr struct {
	series   []sonarr.Series
	added    *sonarr.Series
	profiles []sonarr.QualityProfile
	folders  []sonarr.RootFolder
	lookupFn func(term string) ([]sonarr.Series, error)
	addErr   error
}

func (m *mockSonarr) List() ([]sonarr.Series, error) {
	return m.series, nil
}

func (m *mockSonarr) Lookup(term string) ([]sonarr.Series, error) {
	if m.lookupFn != nil {
		return m.lookupFn(term)
	}
	return m.series, nil
}

func (m *mockSonarr) Get(id int) (*sonarr.Series, error) {
	for _, s := range m.series {
		if s.ID == id {
			return &s, nil
		}
	}
	return nil, nil
}

func (m *mockSonarr) QualityProfiles() ([]sonarr.QualityProfile, error) {
	return m.profiles, nil
}

func (m *mockSonarr) RootFolders() ([]sonarr.RootFolder, error) {
	return m.folders, nil
}

func (m *mockSonarr) Add(s sonarr.Series) (*sonarr.Series, error) {
	if m.addErr != nil {
		return nil, m.addErr
	}
	m.added = &s
	s.ID = 1
	return &s, nil
}

func captureOutput(fn func()) string {
	old := os.Stdout
	r, w, _ := os.Pipe()
	os.Stdout = w
	fn()
	w.Close()
	os.Stdout = old
	var buf bytes.Buffer
	io.Copy(&buf, r)
	return buf.String()
}

func TestTVListEmpty(t *testing.T) {
	mock := &mockSonarr{}
	out := captureOutput(func() {
		TVList(mock, "", false, false)
	})
	if !strings.Contains(out, "No series found") {
		t.Errorf("expected 'No series found', got: %s", out)
	}
}

func TestTVListWithItems(t *testing.T) {
	mock := &mockSonarr{
		series: []sonarr.Series{
			{
				Title:  "Breaking Bad",
				Year:   2008,
				Status: "ended",
				Statistics: &sonarr.Statistics{
					EpisodeFileCount: 62,
					EpisodeCount:     62,
				},
			},
		},
	}
	out := captureOutput(func() {
		TVList(mock, "", false, false)
	})
	if !strings.Contains(out, "Breaking Bad (2008)") {
		t.Errorf("expected series in output, got: %s", out)
	}
	if !strings.Contains(out, "62/62") {
		t.Errorf("expected episode count, got: %s", out)
	}
}

func TestTVAddByID(t *testing.T) {
	mock := &mockSonarr{
		lookupFn: func(term string) ([]sonarr.Series, error) {
			if term == "tvdb:448176" {
				return []sonarr.Series{{Title: "Test Show", Year: 2024, TvdbID: 448176}}, nil
			}
			return nil, nil
		},
	}
	out := captureOutput(func() {
		err := TVAdd(mock, []string{"448176", "--profile", "1", "--rootfolder", "/tv"}, false)
		if err != nil {
			t.Fatal(err)
		}
	})
	if !strings.Contains(out, "Added: Test Show") {
		t.Errorf("expected confirmation, got: %s", out)
	}
	if mock.added == nil {
		t.Fatal("expected Add to be called")
	}
	if mock.added.QualityProfileID != 1 {
		t.Errorf("expected profile 1, got %d", mock.added.QualityProfileID)
	}
	if mock.added.RootFolderPath != "/tv" {
		t.Errorf("expected rootfolder /tv, got %s", mock.added.RootFolderPath)
	}
}

func TestTVAddMissingFlags(t *testing.T) {
	mock := &mockSonarr{}
	err := TVAdd(mock, []string{"448176"}, false)
	if err == nil {
		t.Fatal("expected error for missing flags")
	}
}

func TestTVAddNoResult(t *testing.T) {
	mock := &mockSonarr{
		lookupFn: func(term string) ([]sonarr.Series, error) {
			return nil, nil
		},
	}
	err := TVAdd(mock, []string{"999999", "--profile", "1", "--rootfolder", "/tv"}, false)
	if err == nil {
		t.Fatal("expected error")
	}
	if !strings.Contains(err.Error(), "No series found with TVDB ID 999999") {
		t.Errorf("unexpected error: %v", err)
	}
}

func TestTVAddByTitle(t *testing.T) {
	mock := &mockSonarr{
		lookupFn: func(term string) ([]sonarr.Series, error) {
			return []sonarr.Series{
				{Title: "Breaking Bad", Year: 2008, TvdbID: 81189},
			}, nil
		},
	}
	out := captureOutput(func() {
		err := TVAdd(mock, []string{"Breaking Bad", "--profile", "1", "--rootfolder", "/tv"}, false)
		if err != nil {
			t.Fatal(err)
		}
	})
	if !strings.Contains(out, "Added: Breaking Bad") {
		t.Errorf("expected confirmation, got: %s", out)
	}
}

func TestTVAddFuzzyMatch(t *testing.T) {
	mock := &mockSonarr{
		lookupFn: func(term string) ([]sonarr.Series, error) {
			return []sonarr.Series{
				{Title: "Breaking Bad", Year: 2008, TvdbID: 81189},
				{Title: "Better Call Saul", Year: 2015, TvdbID: 273181},
			}, nil
		},
	}
	out := captureOutput(func() {
		err := TVAdd(mock, []string{"Breaking", "Bad", "--profile", "1", "--rootfolder", "/tv"}, false)
		if err != nil {
			t.Fatal(err)
		}
	})
	if !strings.Contains(out, "Added: Breaking Bad") {
		t.Errorf("expected fuzzy match to Breaking Bad, got: %s", out)
	}
}

func TestTVAddNoMatch(t *testing.T) {
	mock := &mockSonarr{
		lookupFn: func(term string) ([]sonarr.Series, error) {
			return []sonarr.Series{
				{Title: "Something Completely Different", Year: 2020, TvdbID: 99999},
			}, nil
		},
	}
	err := TVAdd(mock, []string{"xyz", "--profile", "1", "--rootfolder", "/tv"}, false)
	if err == nil {
		t.Fatal("expected error for no match")
	}
}

func TestTVProfiles(t *testing.T) {
	mock := &mockSonarr{
		profiles: []sonarr.QualityProfile{
			{ID: 1, Name: "HD-1080p"},
			{ID: 4, Name: "Ultra-HD"},
		},
	}
	out := captureOutput(func() {
		TVProfiles(mock, false)
	})
	if !strings.Contains(out, "ID: 1 — Name: HD-1080p") {
		t.Errorf("expected profile output, got: %s", out)
	}
}

func TestTVRootFolders(t *testing.T) {
	mock := &mockSonarr{
		folders: []sonarr.RootFolder{
			{ID: 1, Path: "/tv", FreeSpace: 107374182400},
		},
	}
	out := captureOutput(func() {
		TVRootFolders(mock, false)
	})
	if !strings.Contains(out, "Path: /tv") {
		t.Errorf("expected folder output, got: %s", out)
	}
}