package com.peachpasswords.qs

import android.content.Context
import android.content.Intent
import android.graphics.drawable.Icon
import android.os.Build
import android.service.quicksettings.Tile
import android.service.quicksettings.TileService
import android.widget.Toast
import com.peachpasswords.MainActivity
import com.peachpasswords.R
import com.peachpasswords.vault.VaultEntry
import com.peachpasswords.vault.VaultRepository
import dagger.hilt.android.AndroidEntryPoint
import javax.inject.Inject

/**
 * Quick Settings tile. Active when the vault is unlocked; tapping it copies the
 * most recently used entry's password to the clipboard. Locked → launches Peach
 * to the lock screen. The vault is a process singleton, so the tile sees the
 * live unlock state without its own session.
 */
@AndroidEntryPoint
class PeachTileService : TileService() {

    @Inject lateinit var vault: VaultRepository

    override fun onStartListening() {
        super.onStartListening()
        updateTile()
    }

    override fun onClick() {
        super.onClick()
        if (vault.isUnlocked.value) {
            val recent = mostRecentPasswordEntry(vault.entries.value)
            if (recent?.password != null) {
                copyToClipboard(recent.title, recent.password!!)
                Toast.makeText(this, "Copied ${recent.title} password", Toast.LENGTH_SHORT).show()
            } else {
                Toast.makeText(this, "No entries to copy", Toast.LENGTH_SHORT).show()
            }
            updateTile()
        } else {
            launchApp()
        }
    }

    private fun launchApp() {
        val intent = Intent(this, MainActivity::class.java).apply { flags = Intent.FLAG_ACTIVITY_NEW_TASK }
        if (Build.VERSION.SDK_INT >= 34) {
            startActivityAndCollapse(
                android.app.PendingIntent.getActivity(
                    this, 0, intent,
                    android.app.PendingIntent.FLAG_IMMUTABLE or android.app.PendingIntent.FLAG_UPDATE_CURRENT,
                ),
            )
        } else {
            @Suppress("DEPRECATION", "StartActivityAndCollapseDeprecated")
            startActivityAndCollapse(intent)
        }
    }

    private fun copyToClipboard(label: String, value: String) {
        // Shared IS_SENSITIVE + 30s auto-clear path (MF-8).
        com.peachpasswords.shared.PeachClipboard.copy(this, label, value)
    }

    private fun updateTile() {
        val tile = qsTile ?: return
        val unlocked = vault.isUnlocked.value
        tile.state = if (unlocked) Tile.STATE_ACTIVE else Tile.STATE_INACTIVE
        tile.label = "Peach"
        tile.contentDescription = if (unlocked) "Copy recent password" else "Unlock Peach"
        if (Build.VERSION.SDK_INT >= 29) {
            tile.subtitle = if (unlocked) "tap to copy" else "locked"
        }
        tile.icon = Icon.createWithResource(this, R.drawable.ic_peach_mark)
        tile.updateTile()
    }
}

internal fun mostRecentPasswordEntry(entries: List<VaultEntry>): VaultEntry? =
    entries
        .filter { !it.password.isNullOrEmpty() }
        .maxByOrNull { it.lastUsedAt ?: it.modifiedAt }