package net.hareworks.simplymcdb.command

import java.util.UUID
import net.hareworks.kommand_lib.KommandLib
import net.hareworks.kommand_lib.kommand
import net.hareworks.simplymcdb.App
import net.hareworks.simplymcdb.Config
import net.hareworks.simplymcdb.State
import net.hareworks.simplymcdb.database.Database
import net.hareworks.simplymcdb.fetch
import net.hareworks.simplymcdb.findPlayersNeedingMigration
import net.hareworks.simplymcdb.isRegistered
import net.hareworks.simplymcdb.overwritePlayerData
import net.hareworks.simplymcdb.register
import net.hareworks.simplymcdb.update
import net.hareworks.simplymcdb.PlayerSerializer
import net.kyori.adventure.audience.Audience
import net.kyori.adventure.text.minimessage.MiniMessage
import org.bukkit.entity.Player
import org.bukkit.plugin.java.JavaPlugin

private val miniMessage = MiniMessage.miniMessage()
private val commandBuffer = mutableMapOf<UUID, String>()

public fun Audience.sendMM(message: String) {
  this.sendMessage(miniMessage.deserialize(message))
}

private fun Audience.sendConfigHelp() {
  sendMM(
      "<red>simplymcdb config help<newline><gray>reload: <green>reload the config from config.yml<newline><gray>fetch: <green>fetch the config from the database<newline><gray>upload: <green>upload the current config to the database")
}

public fun registerCommands(plugin: JavaPlugin): KommandLib =
    kommand(plugin) {
      command("smcdb") {
        description = "Control Simply-Minecraft-DB"
        permission = "simplydb.command"

        executes {
          sender.sendMessage("simplymcdb command")
        }

        literal("config") {
          requires("simplydb.command.config")
          executes { sender.sendConfigHelp() }

          literal("reload") {
            requires("simplydb.command.config.reload")
            executes {
              sender.sendMessage("reloading config...")
              Config.reload()
              sender.sendMessage("reloaded.")
            }
          }

          literal("fetch") {
            requires("simplydb.command.config.fetch")
            executes { sender.sendMessage("fetching config...") }
          }

          literal("upload") {
            requires("simplydb.command.config.upload")
            executes { sender.sendMessage("uploading config...") }
          }

          literal("help") { executes { sender.sendConfigHelp() } }
        }

        literal("help") {
          executes {
            sender.sendMM(
                "<red>simplymcdb help<newline><gray>config: <green>configre the plugin<newline><gray>activate: <green>when the plugin is disabled, activate it<newline><gray>deactivate: <green>when the plugin is enabled, deactivate it")
          }
        }

        literal("activate") {
          requires("simplydb.command.on")
          executes {
            if (App.instance.enabled == State.ACTIVE) {
              sender.sendMessage("simplymcdb is already enabled.")
              return@executes
            }
            App.instance.enable()
            sender.sendMessage("simplymcdb enabled.")
          }
        }

        literal("deactivate") {
          requires("simplydb.command.off")
          executes {
            if (App.instance.enabled == State.DISABLED) {
              sender.sendMessage("simplymcdb is already disabled.")
              return@executes
            }
            App.instance.disable()
            sender.sendMessage("simplymcdb disabled.")
          }
        }

        literal("database") {
          literal("init") {
            executes {
              Database.initialize()
              sender.sendMessage("database initialized.")
            }
          }
          literal("reset") {
            executes {
              Database.reset()
              sender.sendMessage("database reset.")
            }
          }
        }

        literal("migrate") {
          executes {
            val player = sender as? Player
            if (player == null) {
              sender.sendMM("<red>[SMCDB] This command can only be run by players.")
              return@executes
            }
            when (App.instance.enabled) {
              State.DISABLED -> {
                sender.sendMM("<red>[SMCDB] simplymcdb is disabled.")
                return@executes
              }
              State.DISCONNECTED -> {
                sender.sendMM("<yellow>[SMCDB] Database disconnected. Try again later.")
                return@executes
              }
              else -> {}
            }
            if (!isRegistered(player.uniqueId)) {
              sender.sendMM("<red>[SMCDB] You are not registered in the database.")
              return@executes
            }
            try {
              sender.sendMM("<gray>[SMCDB] Applying legacy data...")
              fetch(player)
              update(player)
              sender.sendMM("<green>[SMCDB] Migration complete. Data updated to the latest format.")
            } catch (e: Exception) {
              App.instance.logger.warning("Failed to migrate data for ${player.uniqueId}: ${e.message}")
              sender.sendMM("<red>[SMCDB] Migration failed. Check server logs.")
            }
          }

          literal("all") {
            executes {
              val executor = sender as? Player
              if (executor == null) {
                sender.sendMM("<red>[SMCDB] This command can only be run by players.")
                return@executes
              }
              when (App.instance.enabled) {
                State.DISABLED -> {
                  sender.sendMM("<red>[SMCDB] simplymcdb is disabled.")
                  return@executes
                }
                State.DISCONNECTED -> {
                  sender.sendMM("<yellow>[SMCDB] Database disconnected. Try again later.")
                  return@executes
                }
                else -> {}
              }
              val targets = findPlayersNeedingMigration()
              if (targets.isEmpty()) {
                sender.sendMM("<gray>[SMCDB] No legacy data found.")
                return@executes
              }
              sender.sendMM("<gray>[SMCDB] Migrating ${targets.size} legacy profiles... Please wait.")
              val backup = PlayerSerializer.serialize(executor)
              var migrated = 0
              try {
                targets.forEach { entry ->
                  try {
                    PlayerSerializer.deserialize(executor, entry.serialized)
                    val updatedSnapshot = PlayerSerializer.serialize(executor)
                    overwritePlayerData(entry.uuid, updatedSnapshot)
                    migrated++
                  } catch (ex: Exception) {
                    App.instance.logger.warning("Failed to migrate data for ${entry.uuid}: ${ex.message}")
                  }
                }
              } finally {
                try {
                  PlayerSerializer.deserialize(executor, backup)
                } catch (restoreEx: Exception) {
                  App.instance.logger.warning("Failed to restore migration executor state: ${restoreEx.message}")
                }
              }
              sender.sendMM("<green>[SMCDB] Migration finished ($migrated/${targets.size}). Check logs for failures.")
            }
          }
        }

        literal("check") {
          executes {
            sender.sendMM(
                "${when (App.instance.enabled) {
                  State.ACTIVE -> "<green>●"
                  State.DISCONNECTED -> "<yellow>■"
                  State.DISABLED -> "<red>○"
                }}<white> simply-minecraft-database")
            sender.sendMM(
                "status: ${when (App.instance.enabled) {
                  State.ACTIVE -> "<green>active"
                  State.DISCONNECTED -> "<yellow>disconnected"
                  State.DISABLED -> "<red>disabled"
                }}")
            sender.sendMM(
                "<gray>- <white>database test: ${if (Database.ping()) "success" else "failed"}")
            sender.sendMM(
                "<gray>- <white>config test: ${if (Config.config.getBoolean("enabled")) "enabled" else "disabled"}")
          }
        }

        literal("register") {
          executes {
            val player = sender as? Player
            if (player == null) {
              sender.sendMM("This command is only available for players.")
              return@executes
            }
            when (App.instance.enabled) {
              State.DISABLED -> {
                sender.sendMM("<red>[SMCDB] simplymcdb is disabled.<br>Run /smcdb check to check the status.")
                return@executes
              }
              State.DISCONNECTED -> {
                sender.sendMM("<red>[SMCDB] simplymcdb is enabled but disconnected.<br>Run /smcdb check to check the status.")
                return@executes
              }
              else -> {}
            }
            if (!isRegistered(player.uniqueId)) {
              sender.sendMM(
                  "<gray>[SMCDB] <red>The inventory of the other servers will be overwritten.<newline>" +
                      "Are you sure you want to register?<newline>" +
                      "<green>/smcdb confirm<gray> to confirm.")
              commandBuffer[player.uniqueId] = "register"
            } else {
              sender.sendMM("<gray>[SMCDB] You are already registered.")
            }
          }
        }

        literal("confirm") {
          executes {
            val player = sender as? Player ?: return@executes
            when (commandBuffer[player.uniqueId]) {
              "register" -> {
                if (App.instance.enabled == State.ACTIVE) {
                  register(player)
                  sender.sendMM("<gray>[SMCDB] Successfully registered.")
                } else {
                  sender.sendMM("<red>[SMCDB] simplymcdb is disabled.")
                }
              }
              else -> sender.sendMM("<red>[SMCDB] Invalid command.")
            }
            commandBuffer.remove(player.uniqueId)
          }
        }
      }
    }