import { create } from 'zustand'
import { produce } from 'immer'
import {
  INITIAL_CASH,
  INITIAL_FIELD_SIZE,
  FIELD_UPGRADE_COSTS,
  INITIAL_INVENTORY,
  CROPS,
  INITIAL_GAME_SPEED,
  COOLDOWN_DURATION,
  MARKET_ITEMS,
} from '../constants'
import { GameState, PlotState } from '../types'

const initializeField = (size: number): PlotState[][] => {
  return Array(size)
    .fill(0)
    .map(() =>
      Array(size)
        .fill(0)
        .map(() => ({
          moisture: 0,
          fertility: 1,
        })),
    )
}

const SAVE_SLOT_PREFIX = 'dionysian_idle_save_'

const saveGame = (slot: number, state: GameState) => {
  try {
    const saveData = JSON.stringify(state)
    localStorage.setItem(`${SAVE_SLOT_PREFIX}${slot}`, saveData)
    return true
  } catch (error) {
    console.error('Failed to save game:', error)
    return false
  }
}

const loadGame = (slot: number): GameState | null => {
  try {
    const saveData = localStorage.getItem(`${SAVE_SLOT_PREFIX}${slot}`)
    if (!saveData) return null
    return JSON.parse(saveData)
  } catch (error) {
    console.error('Failed to load game:', error)
    return null
  }
}

export const hasSaveInSlot = (slot: number): boolean => {
  return !!localStorage.getItem(`${SAVE_SLOT_PREFIX}${slot}`)
}

const addConsoleMessage = (state: GameState, text: string) => (
  state.consoleMessages = [
    {
      id: Math.random().toString(36).substring(7),
      text,
      timestamp: Date.now(),
    },
    ...state.consoleMessages,
  ].slice(0, 50)
)


export const useGameStore = create<
  GameState & {
    plant: (row: number, col: number) => void
    water: (row: number, col: number) => void
    harvest: (row: number, col: number) => void
    tick: () => void
    assignCrop: (row: number, col: number, cropId: string) => void
    upgradeField: () => void
    setGameSpeed: (speed: number) => void
    setActionCooldown: (cooldown: number) => void
    buyItem: (itemId: string) => void
    sellItem: (itemId: string) => void
    saveToSlot: (slot: number) => void
    loadFromSlot: (slot: number) => void
  }
>((set, get) => ({
  cash: INITIAL_CASH,
  inventory: INITIAL_INVENTORY,
  fieldSize: INITIAL_FIELD_SIZE,
  maxFieldSize: INITIAL_FIELD_SIZE + FIELD_UPGRADE_COSTS.length,
  fieldUpgradeCosts: FIELD_UPGRADE_COSTS,
  plots: initializeField(INITIAL_FIELD_SIZE),
  gameSpeed: INITIAL_GAME_SPEED,
  actionCooldown: 0,
  tickCount: 0,
  consoleMessages: [],

  assignCrop: (row, col, cropId) => {
    set(
      produce((state) => {
        state.plots[row][col].intended = cropId
      }),
    )
  },

  plant: (row, col) => {
    const { plots, inventory, actionCooldown } = get()

    if (actionCooldown > 0) {
      return
    }

    const plot = plots[row][col]
    if (plot.intended && !plot.current) {
      const seedId = `${plot.intended}_seed`

      if (inventory[seedId] && inventory[seedId] > 0) {
        set(
          produce((state) => {
            state.plots[row][col].current = {
              cropId: plot.intended!,
              progress: 0,
              mature: false,
            }

            state.inventory[seedId] = state.inventory[seedId] - 1
            state.actionCooldown = COOLDOWN_DURATION
          }),
        )
      }
    }
  },

  water: (row, col) => {
    const { plots, actionCooldown } = get()

    if (actionCooldown > 0) {
      return
    }

    const plot = plots[row][col]
    if (plot.current && plot.moisture < 1) {
      set(
        produce((state) => {
          state.plots[row][col].moisture = 1
          state.actionCooldown = COOLDOWN_DURATION
        }),
      )
    }
  },

  harvest: (row, col) => {
    const { plots, actionCooldown } = get()

    if (actionCooldown > 0) {
      return
    }

    const plot = plots[row][col]
    if (plot.current && plot.current.mature) {
      const crop = CROPS[plot.current.cropId]
      const yieldItem = crop.yieldType
      const yieldAmount = crop.yield

      set(
        produce((state) => {
          state.plots[row][col].current = undefined
          state.inventory[yieldItem] =
            (state.inventory[yieldItem] || 0) + yieldAmount
          state.plots[row][col].fertility = Math.max(
            0,
            state.plots[row][col].fertility - crop.fertilityDepletion,
          )
          state.actionCooldown = COOLDOWN_DURATION
        }),
      )
    }
  },

  tick: () => {
    set(
      produce((state) => {
        // Update plots
        state.plots.forEach((row: PlotState[], rowIndex: number) => {
          row.forEach((plot: PlotState, colIndex: number) => {
            // Regenerate fertility every 100 ticks
            if (state.tickCount % 100 === 0 && plot.fertility < 1) {
              state.plots[rowIndex][colIndex].fertility = Math.min(
                1,
                plot.fertility + 0.1,
              )
            }

            if (!plot.current || plot.current.mature) {
              return
            }

            const crop = CROPS[plot.current.cropId]
            const waterNeeded = crop.waterPerTick

            // Check if water is running low (less than 25% of what's needed)
            if (plot.moisture < waterNeeded * 0.25 && plot.moisture > 0) {
              addConsoleMessage(
                state,
                `Plot (${rowIndex + 1},${colIndex + 1}) ${crop.name} is running low on water!`,
              )
            }

            // Only grow if fertility is above 0.2
            if (plot.moisture >= waterNeeded && plot.fertility >= 0.2) {
              let growthRate = 1
              // Half growth rate if fertility is between 0.2 and 0.5
              if (plot.fertility < 0.5) {
                growthRate = 0.5
              }

              const newProgress = plot.current.progress + growthRate
              const mature = newProgress >= crop.growthTicks

              state.plots[rowIndex][colIndex].moisture =
                plot.moisture - waterNeeded
              state.plots[rowIndex][colIndex].current.progress = newProgress
              
              // If the plot just became mature, add a message
              if (mature && !plot.current.mature) {
                addConsoleMessage(
                  state,
                  `Plot (${rowIndex + 1},${colIndex + 1}) ${crop.name} is ready to harvest!`,
                )
              }
              
              state.plots[rowIndex][colIndex].current.mature = mature
            }
          })
        })

        state.tickCount = state.tickCount + 1
      }),
    )
  },

  upgradeField: () => {
    set(
      produce((state) => {
        if (state.fieldSize >= state.maxFieldSize) {
          return
        }

        const upgradeIndex = state.fieldSize - INITIAL_FIELD_SIZE
        const cost = state.fieldUpgradeCosts[upgradeIndex]

        if (state.cash < cost) {
          return
        }

        const newSize = state.fieldSize + 1

        state.cash = state.cash - cost
        state.fieldSize = newSize
        state.plots = initializeField(newSize)
      }),
    )
  },

  setGameSpeed: (speed) => {
    set(
      produce((state) => {
        state.gameSpeed = speed
      }),
    )
  },

  setActionCooldown: (cooldown) => {
    set(
      produce((state) => {
        state.actionCooldown = cooldown
      }),
    )
  },

  buyItem: (itemId) => {
    const { cash } = get()
    const item = MARKET_ITEMS[itemId]

    if (!item || item.buyPrice === null || item.buyPrice === undefined) {
      return
    }

    if (cash < item.buyPrice) {
      return
    }

    set(
      produce((state) => {
        state.cash -= item.buyPrice!
        state.inventory[itemId] = (state.inventory[itemId] || 0) + 1
      }),
    )
  },

  sellItem: (itemId) => {
    const { inventory } = get()
    const item = MARKET_ITEMS[itemId]

    if (
      !item ||
      item.sellPrice === null ||
      !inventory[itemId] ||
      inventory[itemId] <= 0
    ) {
      return
    }

    set(
      produce((state) => {
        state.cash += item.sellPrice
        state.inventory[itemId] -= 1
      }),
    )
  },

  saveToSlot: (slot: number) => {
    const state = get()
    const {
      plant,
      water,
      harvest,
      tick,
      assignCrop,
      upgradeField,
      setGameSpeed,
      setActionCooldown,
      buyItem,
      sellItem,
      saveToSlot,
      loadFromSlot,
      ...gameState
    } = state
    saveGame(slot, gameState)
  },

  loadFromSlot: (slot: number) => {
    const savedState = loadGame(slot)
    if (savedState) {
      set(savedState)
    }
  },
}))