local anim8 = require "lib/anim8"
require 'lib/vec3'

--- Скорость между кадрами в анимации
local ANIMATION_SPEED = 0.1

local characterId = 1

--- @class Character
--- @field id integer
--- @field name string
--- @field animationTable table<string, table>
--- @field state "idle"|"run"|"attack"|"hurt"
--- @field stats table<string, integer>
--- @field player table
--- @field skills table
--- @field class "warrior"|"mage"
--- @field position Vec3
--- @field size Vec3
local character = {}
character.__index = character

--- Создаёт персонажа, которым будет управлять или игрок или компьютер
--- @param name string
--- @param spriteDir table
--- @param level? integer
local function spawn(name, spriteDir, level)
    local animationGrid = {}
    -- n: name; i: image
    for n, i in pairs(spriteDir) do
        local aGrid = anim8.newGrid(96, 64, i:getWidth(), i:getHeight())
        local tiles = '1-' .. math.ceil(i:getWidth() / 96)
        animationGrid[n] = aGrid(tiles, 1)
    end

    local char = {
        name = name,
        animationTable = {}
    }

    char.id = characterId
    characterId = characterId + 1

    char.position = Vec3({})
    char.size = Vec3({ 1, 1 })

    char.state = "idle"

    char.animationTable.idle = anim8.newAnimation(animationGrid["idle"], ANIMATION_SPEED)
    char.animationTable.run = anim8.newAnimation(animationGrid["run"], ANIMATION_SPEED)
    char.animationTable.attack = anim8.newAnimation(animationGrid["attack"], ANIMATION_SPEED, function()
        char.state = "idle"
    end)
    char.animationTable.hurt = anim8.newAnimation(animationGrid["hurt"], ANIMATION_SPEED, function()
        char.state = "idle"
    end)

    char.stats = {}
    --- @todo придумать формулу расчёта статов относительно уровня
    char.stats.level = 1

    char.stats.initiative = 10
    char.stats.damage = 5
    char.stats.defence = 0
    char.stats.hp = 30

    char = setmetatable(char, character)
    Tree.level.characters[char.id] = char
    return char
end

function character:update(dt)
    if love.keyboard.isDown("r") then
        self.state = "run"
    end
    if love.keyboard.isDown("i") then
        self.state = "idle"
    end
    if love.keyboard.isDown("u") then
        self.state = "attack"
    end
    if love.keyboard.isDown("h") then
        self.state = "hurt"
    end
    self.animationTable[self.state]:update(dt)
end

function character:draw()
    local ppm = Tree.level.camera.pixelsPerMeter
    self.animationTable[self.state]:draw(Tree.assets.files.sprites.character[self.state], self.position.x,
        self.position.y, nil, 1 / ppm, 1 / ppm, 38, 47)
end

return { spawn = spawn }