package handlers

import (
	"testing"

	"bookhoard/internal/database"
	"bookhoard/internal/services"

	"github.com/google/uuid"
	"github.com/jackc/pgx/v5/pgtype"
	"github.com/stretchr/testify/assert"
)

func TestBuildSections_ConvertsServiceTypesToHandlerTypes(t *testing.T) {
	itemUUID := uuid.New()

	serviceSections := []services.DashboardSection{
		{
			CollectionID:   uuid.UUID{},
			CollectionName: "continue-reading",
			QueryType:      "continue-reading",
			Priority:       1,
			IsSystem:       true,
			Title:          "Continue Reading",
			Description:    "Books you're currently reading",
			Icon:           "📖",
			Items: []database.MediaItems{
				{
					ID:             pgtype.UUID{Bytes: itemUUID, Valid: true},
					Title:          "Test Book",
					Author:         pgtype.Text{String: "Test Author", Valid: true},
					CoverImagePath: pgtype.Text{String: "/path/to/cover.jpg", Valid: true},
				},
			},
		},
		{
			CollectionID:   uuid.UUID{},
			CollectionName: "my-favorites",
			QueryType:      "filter",
			Priority:       10,
			IsSystem:       false,
			Title:          "My Favorites",
			Description:    "My favorite books",
			Icon:           "⭐",
			Items:          []database.MediaItems{},
		},
	}

	result := BuildSections(serviceSections, "")

	assert.Equal(t, 2, len(result), "should have 2 sections")

	section1 := result[0]
	assert.Equal(t, "continue-reading", section1.ID, "ID should match")
	assert.True(t, section1.IsSystem, "IsSystem should be boolean true")
	assert.Equal(t, "Continue Reading", section1.Title, "Title should be string")
	assert.Equal(t, "Books you're currently reading", section1.Description, "Description should be string")
	assert.Equal(t, "📖", section1.Icon, "Icon should be string")
	assert.Equal(t, 1, section1.Priority, "Priority should be number")
	assert.Equal(t, "/collections/00000000-0000-0000-0000-000000000000", section1.ViewAllURL, "ViewAllURL should match collection URL")

	section2 := result[1]
	assert.Equal(t, "my-favorites", section2.ID)
	assert.False(t, section2.IsSystem, "IsSystem should be boolean false")
	assert.Equal(t, "My Favorites", section2.Title)
	assert.Equal(t, "/collections/00000000-0000-0000-0000-000000000000", section2.ViewAllURL, "ViewAllURL should be set for user collections")
}

func TestBuildSections_ConvertsItemsCorrectly(t *testing.T) {
	itemUUID := uuid.New()

	serviceSections := []services.DashboardSection{
		{
			CollectionID:   uuid.UUID{},
			CollectionName: "continue-reading",
			QueryType:      "continue-reading",
			Priority:       1,
			IsSystem:       true,
			Title:          "Continue Reading",
			Description:    "Books you're currently reading",
			Icon:           "📖",
			Items: []database.MediaItems{
				{
					ID:             pgtype.UUID{Bytes: itemUUID, Valid: true},
					Title:          "Test Book",
					Author:         pgtype.Text{String: "Test Author", Valid: true},
					CoverImagePath: pgtype.Text{String: "/path/to/cover.jpg", Valid: true},
				},
			},
		},
	}

	result := BuildSections(serviceSections, "")

	assert.Equal(t, 1, len(result), "should have 1 section")
	section := result[0]
	assert.Equal(t, 1, len(section.Items), "should have 1 item")

	item := section.Items[0]
	assert.Equal(t, itemUUID.String(), item.MediaItemID, "MediaItemID should match")
	assert.Equal(t, "Test Book", item.Title, "Title should be string")
	assert.Equal(t, "Test Author", item.Author, "Author should be string")
	assert.Equal(t, "/path/to/cover.jpg", item.CoverImagePath, "CoverImagePath should be string")
}

func TestTextToString_Valid(t *testing.T) {
	tests := []struct {
		name     string
		input    pgtype.Text
		expected string
	}{
		{
			name:     "valid text",
			input:    pgtype.Text{String: "hello", Valid: true},
			expected: "hello",
		},
		{
			name:     "empty text",
			input:    pgtype.Text{String: "", Valid: true},
			expected: "",
		},
		{
			name:     "invalid text",
			input:    pgtype.Text{String: "ignored", Valid: false},
			expected: "",
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			result := textToString(tt.input)
			assert.Equal(t, tt.expected, result, "textToString result mismatch")
		})
	}
}

func TestGetViewAllURL_SystemCollections(t *testing.T) {
	tests := []struct {
		name         string
		collectionID string
		libraryID    string
		expected     string
	}{
		{
			name:         "continue-reading with no library",
			collectionID: "continue-reading",
			libraryID:    "",
			expected:     "/collections/continue-reading",
		},
		{
			name:         "continue-reading with library",
			collectionID: "continue-reading",
			libraryID:    "lib-123",
			expected:     "/collections/continue-reading?library_id=lib-123",
		},
		{
			name:         "recently-added with no library",
			collectionID: "recently-added",
			libraryID:    "",
			expected:     "/collections/recently-added",
		},
		{
			name:         "recently-read with library",
			collectionID: "recently-read",
			libraryID:    "lib-456",
			expected:     "/collections/recently-read?library_id=lib-456",
		},
		{
			name:         "not-started with no library",
			collectionID: "not-started",
			libraryID:    "",
			expected:     "/collections/not-started",
		},
		{
			name:         "user collection with library",
			collectionID: "my-favorites",
			libraryID:    "lib-789",
			expected:     "/collections/my-favorites?library_id=lib-789",
		},
		{
			name:         "empty collection ID",
			collectionID: "",
			libraryID:    "lib-123",
			expected:     "",
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			result := getViewAllURL(tt.collectionID, tt.libraryID)
			assert.Equal(t, tt.expected, result, "getViewAllURL mismatch")
		})
	}
}
