package main_test

import (
	"context"
	"io/ioutil"
	"os"
	"path"
	"slices"
	"testing"

	main "gitea/show-ingestion"
)

func TestRun(t *testing.T) {
	cases := map[string]struct {
		given     []string
		patterns  []string
		overrides map[string]string
		want      []string
	}{
		"empty": {},
		"fallback survivor": {
			given: []string{
				"Survivor.AU.S12E11.1080p.HEVC.x265-MeGusta[EZTVx.to].mkv",
				"Survivor.AU.S12E11.720p.HEVC.x265-MeGusta[EZTVx.to].mkv",
				"Survivor.AU.S12E12.720p.HEVC.x265-MeGusta[EZTVx.to].mkv",
			},
			patterns: []string{
				".urvivor.[Aa][Uu].*[sS](?P<season>[0-9]+)[eE](?P<episode>[0-9]*).*1080.*MeGusta",
				".urvivor.[Aa][Uu].*[sS](?P<season>[0-9]+)[eE](?P<episode>[0-9]*).*720.*MeGusta",
			},
			overrides: map[string]string{
				"title": "Australian_Survivor",
			},
			want: []string{
				"Australian_Survivor_S12E11.mkv",
				"Australian_Survivor_S12E12.mkv",
			},
		},
		"easy w group": {
			given: []string{
				"[SubsPlease] Tokidoki Bosotto Russia-go de Dereru Tonari no Alya-san - 01 (720p) [A12844D5].mkv",
				"[SubsPlease] Tokidoki Bosotto Russia-go de Dereru Tonari no Alya-san - 02 (720p) [2608F490].mkv",
			},
			patterns: []string{
				`^\[[^\]]*\] (?P<title>.*) - (?<episode>[0-9]*)`,
			},
			overrides: map[string]string{
				"season": "01",
			},
			want: []string{
				"Tokidoki_Bosotto_Russia-go_de_Dereru_Tonari_no_Alya-san_S01E01.mkv",
				"Tokidoki_Bosotto_Russia-go_de_Dereru_Tonari_no_Alya-san_S01E02.mkv",
			},
		},
	}

	for name, d := range cases {
		c := d
		t.Run(name, func(t *testing.T) {
			ind := t.TempDir()
			for _, f := range c.given {
				ioutil.WriteFile(path.Join(ind, f), []byte{}, os.ModePerm)
			}
			outd := t.TempDir()

			if err := main.Run(context.Background(), outd, ind, c.patterns, c.overrides); err != nil {
				t.Fatal(err)
			}

			for _, f := range c.want {
				if stat, err := os.Stat(path.Join(outd, f)); os.IsNotExist(err) {
					t.Errorf("expected %s", f)
				} else if !stat.Mode().IsRegular() {
					t.Errorf("%s not a regular file: %v", f, stat.Mode())
				}
			}

			if entries, err := os.ReadDir(outd); err != nil {
				t.Error("failed to list outdir: %w", err)
			} else {
				for _, entry := range entries {
					t.Logf("%s", entry.Name())
					if !slices.Contains(c.want, path.Base(entry.Name())) {
						t.Errorf("unexpected %s", entry.Name())
					}
					if stat, err := entry.Info(); err != nil {
						t.Errorf("cant read info of %s: %v", entry.Name(), err)
					} else if !stat.Mode().IsRegular() {
						t.Errorf("non-regular file %s in out: %v", entry.Name(), stat.Mode())
					}
				}
			}

			if entries, err := os.ReadDir(outd); err != nil {
				t.Error("failed to list outdir: %w", err)
			} else {
				for _, entry := range entries {
					if !slices.Contains(c.want, path.Base(entry.Name())) {
						t.Errorf("unexpected %s", entry.Name())
					}
				}
			}

			if entries, err := os.ReadDir(ind); err != nil {
				t.Error("failed to list indir: %w", err)
			} else {
				for _, entry := range entries {
					inf := path.Join(ind, entry.Name())
					if _, err := os.Stat(inf); err != nil {
						t.Errorf("%s no longer in ind: %v", inf, err)
					}
				}
			}
		})
	}
}