package repository_test

import (
	"testing"
	"testing/synctest"

	"context"
	"fmt"
	"time"

	"git.hrafn.xyz/aether/notes/internal/models"
	"git.hrafn.xyz/aether/notes/internal/repository"
)

func TestCreateNote(t *testing.T) {
	testCases := []struct {
		name          string
		content       string
		expectedNote  models.Note
		expectedError bool
	}{
		{
			name:    "Good note",
			content: "This is a good note with valid content.",
			expectedNote: models.Note{
				ID:         1,
				LastUpdate: time.Date(2000, 1, 1, 0, 0, 0, 0, time.UTC), //LastUpdate is set by synctest to this specific time
				Content:    "This is a good note with valid content.",
			},
			expectedError: false,
		},
		{
			name:          "Empty content",
			content:       "",
			expectedNote:  models.Note{},
			expectedError: true,
		},
		{
			name:    "Long content",
			content: "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.",
			expectedNote: models.Note{
				ID:         2,
				LastUpdate: time.Date(2000, 1, 1, 0, 0, 0, 0, time.UTC),
				Content:    "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.",
			},
			expectedError: false,
		},
	}
	repo := repository.NewNoteRepository(&mockNoteStore{})
	for _, tc := range testCases {
		t.Run(tc.name, func(t *testing.T) {
			synctest.Test(t, func(t *testing.T) {
				note, err := repo.CreateNote(context.Background(), tc.content)
				if tc.expectedError {
					if err == nil {
						t.Errorf("expected an error but got none")
					}
				} else {
					if err != nil {
						t.Errorf("unexpected error: %v", err)
					}
				}
				if note.Content != tc.expectedNote.Content {
					t.Errorf("expected content %q but got %q", tc.expectedNote.Content, note.Content)
				}
				if note.ID != tc.expectedNote.ID {
					t.Errorf("expected ID %d but got %d", tc.expectedNote.ID, note.ID)
				}
				if !note.LastUpdate.Equal(tc.expectedNote.LastUpdate) {
					t.Errorf("expected LastUpdate %v but got %v", tc.expectedNote.LastUpdate, note.LastUpdate)
				}
				fmt.Printf("Test case '%s' passed.\n", tc.name)
			})
		})
	}
}

func TestGetNotes(t *testing.T) {
	notes := []models.Note{
		{ID: 1, LastUpdate: time.Date(2000, 1, 1, 0, 0, 0, 0, time.UTC), Content: "First note"},
		{ID: 2, LastUpdate: time.Date(2000, 1, 1, 0, 0, 0, 0, time.UTC), Content: "Second note"},
		{ID: 3, LastUpdate: time.Date(2000, 1, 1, 0, 0, 0, 0, time.UTC), Content: "Third note"},
		// 4th note was clearly deleted, :sadface:
		{ID: 5, LastUpdate: time.Date(2000, 1, 1, 0, 0, 0, 0, time.UTC), Content: "Lorem ipsum note dolor sit amet, consectetur adipiscing elit. Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua."},
	}
	store := &mockNoteStore{Notes: notes}
	repo := repository.NewNoteRepository(store)

	testCases := []struct {
		name          string
		id            int
		expectedNote  models.Note
		expectedError bool
	}{
		{
			name:          "Existing note",
			id:            1,
			expectedNote:  notes[0],
			expectedError: false,
		},
		{
			name:          "Non-existing note",
			id:            999,
			expectedNote:  models.Note{},
			expectedError: true,
		},
		{
			name:          "Secret missing 4th note",
			id:            4,
			expectedNote:  models.Note{},
			expectedError: true,
		},
		{
			name:          "That long lorem ipsum note",
			id:            5,
			expectedNote:  notes[3],
			expectedError: false,
		},
	}
	for _, tc := range testCases {
		t.Run(tc.name, func(t *testing.T) {
			note, err := repo.GetNote(context.Background(), tc.id)
			if tc.expectedError {
				if err == nil {
					t.Errorf("expected an error but got none")
				}
			} else {
				if err != nil {
					t.Errorf("unexpected error: %v", err)
				}
			}
			if note.Content != tc.expectedNote.Content {
				t.Errorf("expected content %q but got %q", tc.expectedNote.Content, note.Content)
			}
			if note.ID != tc.expectedNote.ID {
				t.Errorf("expected ID %d but got %d", tc.expectedNote.ID, note.ID)
			}
			// Purposefully not checking time as it doesn't make sense in context
		})
	}

}

func TestListNotes(t *testing.T) {
	testcases := []struct {
		name          string
		notes         []models.Note
		expectedNotes []models.Note
		expectedError bool
	}{
		{
			name:          "No notes",
			notes:         []models.Note{},
			expectedNotes: []models.Note{},
			expectedError: false,
		},
		{
			name: "Multiple notes",
			notes: []models.Note{
				{ID: 1, LastUpdate: time.Date(2000, 1, 1, 0, 0, 0, 0, time.UTC), Content: "First note"},
				{ID: 2, LastUpdate: time.Date(2000, 1, 1, 0, 0, 0, 0, time.UTC), Content: "Second note"},
				{ID: 3, LastUpdate: time.Date(2000, 1, 1, 0, 0, 0, 0, time.UTC), Content: "Third note"},
			},
			expectedNotes: []models.Note{
				{ID: 1, LastUpdate: time.Date(2000, 1, 1, 0, 0, 0, 0, time.UTC), Content: "First note"},
				{ID: 2, LastUpdate: time.Date(2000, 1, 1, 0, 0, 0, 0, time.UTC), Content: "Second note"},
				{ID: 3, LastUpdate: time.Date(2000, 1, 1, 0, 0, 0, 0, time.UTC), Content: "Third note"},
			},
			expectedError: false,
		},
	}
	for _, tc := range testcases {
		t.Run(tc.name, func(t *testing.T) {
			store := &mockNoteStore{Notes: tc.notes}
			repo := repository.NewNoteRepository(store)
			notes, err := repo.ListNotes(context.Background())
			if tc.expectedError {
				if err == nil {
					t.Errorf("expected an error but got none")
				}
			} else {
				if err != nil {
					t.Errorf("unexpected error: %v", err)
				}
			}
			if len(notes) != len(tc.expectedNotes) {
				t.Errorf("expected %d notes but got %d", len(tc.expectedNotes), len(notes))
			}
			for i, note := range notes {
				if note.Content != tc.expectedNotes[i].Content {
					t.Errorf("expected content %q but got %q", tc.expectedNotes[i].Content, note.Content)
				}
				if note.ID != tc.expectedNotes[i].ID {
					t.Errorf("expected ID %d but got %d", tc.expectedNotes[i].ID, note.ID)
				}
				// Purposefully not checking time as it doesn't make sense in context
			}
		})
	}
}

func TestUpdateNote(t *testing.T) {
	notes := []models.Note{
		{ID: 1, LastUpdate: time.Date(1984, 11, 20, 0, 0, 0, 0, time.UTC), Content: "First note"},
		{ID: 2, LastUpdate: time.Date(2018, 6, 8, 0, 0, 0, 0, time.UTC), Content: "Second note"},
	}
	store := &mockNoteStore{Notes: notes}
	repo := repository.NewNoteRepository(store)
	testcases := []struct {
		name          string
		id            int
		content       string
		expectedNote  models.Note
		expectedError bool
	}{
		{
			name:    "Update existing note",
			id:      1,
			content: "Updated first note",
			expectedNote: models.Note{
				ID:         1,
				LastUpdate: time.Date(2000, 1, 1, 0, 0, 0, 0, time.UTC),
				Content:    "Updated first note",
			},
			expectedError: false,
		},
		{
			name:          "Update non-existing note",
			id:            999,
			content:       "This note does not exist",
			expectedNote:  models.Note{},
			expectedError: true,
		},
		{
			name:          "Update with empty content",
			id:            2,
			content:       "",
			expectedNote:  models.Note{},
			expectedError: true,
		},
	}
	for _, tc := range testcases {
		t.Run(tc.name, func(t *testing.T) {
			synctest.Test(t, func(t *testing.T) {
				note, err := repo.UpdateNote(context.Background(), tc.id, tc.content)
				if tc.expectedError {
					if err == nil {
						t.Errorf("expected an error but got none")
					}
				} else {
					if err != nil {
						t.Errorf("unexpected error: %v", err)
					}
				}
				if note.Content != tc.expectedNote.Content {
					t.Errorf("expected content %q but got %q", tc.expectedNote.Content, note.Content)
				}
				if note.ID != tc.expectedNote.ID {
					t.Errorf("expected ID %d but got %d", tc.expectedNote.ID, note.ID)
				}
				if !note.LastUpdate.Equal(tc.expectedNote.LastUpdate) {
					t.Errorf("expected LastUpdate %v but got %v", tc.expectedNote.LastUpdate, note.LastUpdate)
				}
				fmt.Printf("Test case '%s' passed.\n", tc.name)
			})
		})
	}
}

func TestDeleteNote(t *testing.T) {
	testcases := []struct {
		name          string
		id            int
		setupNotes    []models.Note
		expectedNotes []models.Note
		expectedError bool
	}{
		{
			name: "Delete existing note",
			id:   1,
			setupNotes: []models.Note{
				{ID: 1, LastUpdate: time.Date(2000, 1, 1, 0, 0, 0, 0, time.UTC), Content: "First note"},
				{ID: 2, LastUpdate: time.Date(2000, 1, 1, 0, 0, 0, 0, time.UTC), Content: "Second note"},
			},
			expectedNotes: []models.Note{
				{ID: 2, LastUpdate: time.Date(2000, 1, 1, 0, 0, 0, 0, time.UTC), Content: "Second note"},
			},
			expectedError: false,
		},
		{
			name: "Delete non-existing note",
			id:   999,
			setupNotes: []models.Note{
				{ID: 1, LastUpdate: time.Date(2000, 1, 1, 0, 0, 0, 0, time.UTC), Content: "First note"},
				{ID: 2, LastUpdate: time.Date(2000, 1, 1, 0, 0, 0, 0, time.UTC), Content: "Second note"},
			},
			expectedNotes: []models.Note{
				{ID: 1, LastUpdate: time.Date(2000, 1, 1, 0, 0, 0, 0, time.UTC), Content: "First note"},
				{ID: 2, LastUpdate: time.Date(2000, 1, 1, 0, 0, 0, 0, time.UTC), Content: "Second note"},
			},
			expectedError: true,
		},
	}
	for _, tc := range testcases {
		t.Run(tc.name, func(t *testing.T) {
			store := &mockNoteStore{Notes: tc.setupNotes}
			repo := repository.NewNoteRepository(store)
			err := repo.DeleteNote(context.Background(), tc.id)
			if tc.expectedError {
				if err == nil {
					t.Errorf("expected an error but got none")
				}
			} else {
				if err != nil {
					t.Errorf("unexpected error: %v", err)
				}
			}
			notes, _ := repo.ListNotes(context.Background())
			if len(notes) != len(tc.expectedNotes) {
				t.Errorf("expected %d notes but got %d", len(tc.expectedNotes), len(notes))
			}
			for i, note := range notes {
				if len(tc.expectedNotes) <= i {
					t.Errorf("unexpected extra note: %v", note)
					continue
				}
				if note.Content != tc.expectedNotes[i].Content {
					t.Errorf("expected content %q but got %q", tc.expectedNotes[i].Content, note.Content)
				}
				if note.ID != tc.expectedNotes[i].ID {
					t.Errorf("expected ID %d but got %d", tc.expectedNotes[i].ID, note.ID)
				}
				// Purposefully not checking time as it doesn't make sense in context
			}
		})
	}
}