package com.peachpasswords.ui.vault

import com.peachpasswords.vault.VaultEntry
import org.junit.Assert.assertEquals
import org.junit.Assert.assertFalse
import org.junit.Assert.assertTrue
import org.junit.Test

class EntryEditScreenTest {

    // ── Top-bar label (cancel | <title> | save) ───────────────────────────────

    @Test fun title_bar_label_is_type_specific_for_new_entries() {
        assertEquals("new entry", editTitleBarLabel(isNew = true, type = "login"))
        assertEquals("new note", editTitleBarLabel(isNew = true, type = "note"))
        assertEquals("new card", editTitleBarLabel(isNew = true, type = "card"))
    }

    @Test fun title_bar_label_is_edit_for_existing_entries() {
        assertEquals("edit", editTitleBarLabel(isNew = false, type = "login"))
        assertEquals("edit", editTitleBarLabel(isNew = false, type = "note"))
    }

    @Test fun primary_action_label_matches_browser_add_view() {
        assertEquals("create", entryEditPrimaryActionLabel(isNew = true, saving = false))
        assertEquals("save", entryEditPrimaryActionLabel(isNew = false, saving = false))
        assertEquals("saving...", entryEditPrimaryActionLabel(isNew = true, saving = true))
    }

    @Test fun save_is_disabled_until_browser_minimum_fields_are_present() {
        assertFalse(canSaveEditForm(EditForm(type = "login", title = "")))
        assertTrue(canSaveEditForm(EditForm(type = "login", title = "GitHub")))
        assertFalse(canSaveEditForm(EditForm(type = "card", title = "Visa", cardholderName = "", cardNumber = "4242")))
        assertFalse(canSaveEditForm(EditForm(type = "card", title = "Visa", cardholderName = "June", cardNumber = "")))
        assertTrue(canSaveEditForm(EditForm(type = "card", title = "Visa", cardholderName = "June", cardNumber = "4242")))
    }

    // ── New note routes to NotesMode, not the form ────────────────────────────

    @Test fun new_note_routes_to_notes_mode() {
        assertTrue(shouldOpenNotesMode(isNew = true, type = "note"))
        // Existing note stays in the form; new login/card stay in the form.
        assertFalse(shouldOpenNotesMode(isNew = false, type = "note"))
        assertFalse(shouldOpenNotesMode(isNew = true, type = "login"))
        assertFalse(shouldOpenNotesMode(isNew = true, type = "card"))
    }

    // ── Ghost watermark fades in as the title is typed ────────────────────────

    @Test fun new_entry_ghost_watermark_appears_on_title_type() {
        assertEquals(0f, editGhostWatermarkTarget(""), 0f)
        assertEquals(0f, editGhostWatermarkTarget("   "), 0f)
        assertEquals(0.03f, editGhostWatermarkTarget("GitHub"), 0f)
    }

    // ── Browser AddView optional login fields ────────────────────────────────

    @Test fun new_login_hides_optional_totp_and_notes_until_requested() {
        assertFalse(shouldShowLoginTotp("login", revealed = false, totp = ""))
        assertFalse(shouldShowLoginNotes("login", revealed = false, notes = ""))
        assertTrue(shouldShowAddTotpLink("login", revealed = false, totp = ""))
        assertTrue(shouldShowAddNotesLink("login", revealed = false, notes = ""))
    }

    @Test fun optional_login_fields_show_when_revealed_or_populated() {
        assertTrue(shouldShowLoginTotp("login", revealed = true, totp = ""))
        assertTrue(shouldShowLoginTotp("login", revealed = false, totp = "JBSWY3DPEHPK3PXP"))
        assertTrue(shouldShowLoginNotes("login", revealed = true, notes = ""))
        assertTrue(shouldShowLoginNotes("login", revealed = false, notes = "remember this"))
        assertFalse(shouldShowAddTotpLink("login", revealed = true, totp = ""))
        assertFalse(shouldShowAddNotesLink("login", revealed = false, notes = "remember this"))
    }

    @Test fun identity_suggestions_split_username_and_email_like_browser() {
        val entries = listOf(
            identityEntry("a", username = "june", email = "june@example.com"),
            identityEntry("b", username = "june", email = null),
            identityEntry("c", username = "billing@example.com", email = "ops@example.com"),
            identityEntry("d", username = "billing@example.com", email = null),
        )

        assertEquals(listOf("june"), identitySuggestionsFor(entries, IdentityField.Username))
        assertEquals(
            listOf("billing@example.com", "june@example.com", "ops@example.com"),
            identitySuggestionsFor(entries, IdentityField.Email),
        )
    }

    @Test fun generator_defaults_and_toggle_label_match_browser_add_view() {
        assertEquals(64, BROWSER_ADD_GENERATOR_LENGTH)
        assertEquals("generate", generatorToggleLabel(open = false))
        assertEquals("hide generator", generatorToggleLabel(open = true))
    }

    @Test fun tag_suggestions_match_browser_add_view_limit_and_filtering() {
        val all = listOf("banking", "billing", "books", "business", "backup", "travel")
        assertEquals(
            listOf("banking", "billing", "books", "business", "backup"),
            tagSuggestionsFor(input = "b", allTags = all, tags = emptyList()),
        )
        assertEquals(
            listOf("billing", "books", "business", "backup"),
            tagSuggestionsFor(input = "b", allTags = all, tags = listOf("banking")),
        )
    }

    @Test fun tag_normalization_allows_spaces_and_caps_length_like_browser() {
        assertEquals("shared login", normalizeTag(" Shared Login "))
        assertEquals("a".repeat(MAX_TAG_LEN), normalizeTag("A".repeat(MAX_TAG_LEN + 8)))
    }

    // ── Card field formatting (CardFieldUtils, used live by setCardNumber etc.) ─

    @Test fun new_card_number_auto_formats() {
        assertEquals("4242 4242 4242 4242", CardFieldUtils.formatPan("4242424242424242"))
        // Amex groups 4-6-5.
        assertEquals("3782 822463 10005", CardFieldUtils.formatPan("378282246310005"))
    }

    @Test fun card_network_detection_matches_browser_add_view_badges() {
        assertEquals("visa", CardFieldUtils.detectNetwork("4242424242424242"))
        assertEquals("mastercard", CardFieldUtils.detectNetwork("5555555555554444"))
        assertEquals("mastercard", CardFieldUtils.detectNetwork("2221000000000009"))
        assertEquals("amex", CardFieldUtils.detectNetwork("378282246310005"))
        assertEquals("discover", CardFieldUtils.detectNetwork("6011111111111117"))
        assertEquals("discover", CardFieldUtils.detectNetwork("6500000000000002"))
        assertEquals("unknown", CardFieldUtils.detectNetwork("6000000000000000"))
    }

    @Test fun new_card_expiry_auto_formats_browser_mm_year() {
        assertEquals("12", CardFieldUtils.formatExpiry("12"))
        assertEquals("12/28", CardFieldUtils.formatExpiry("1228"))
        assertEquals("12/2899", CardFieldUtils.formatExpiry("122899")) // caps year at 4 digits
        assertEquals("12", CardFieldUtils.expiryMonth("12/2028"))
        assertEquals("2028", CardFieldUtils.expiryYear("12/2028"))
        assertEquals("12/2028", CardFieldUtils.combineExpiry("12", "2028"))
    }

    @Test fun new_card_expiry_rejects_invalid_month() {
        // currentYear2 = 26, currentMonth = 6 (2026-06).
        assertFalse(CardFieldUtils.isExpiryValid("13/28", currentYear2 = 26, currentMonth = 6))
        assertFalse(CardFieldUtils.isExpiryValid("00/28", currentYear2 = 26, currentMonth = 6))
        assertTrue(CardFieldUtils.isExpiryValid("12/28", currentYear2 = 26, currentMonth = 6))
        assertTrue(CardFieldUtils.isExpiryValid("12/2028", currentYear2 = 26, currentMonth = 6))
        // Past year rejected.
        assertFalse(CardFieldUtils.isExpiryValid("12/24", currentYear2 = 26, currentMonth = 6))
    }

    private fun identityEntry(id: String, username: String?, email: String?) = VaultEntry(
        id = id,
        title = id,
        type = "login",
        username = username,
        email = email,
        createdAt = 0,
        modifiedAt = 0,
    )
}