-- sporel-module-map-editor v0.1.0
-- Interactive map editor — see docs/superpowers/specs/2026-05-23-sporel-module-map-editor-design.md

local maps    = require("lib-core.maps")
local camera  = require("lib-core.camera")
local input   = require("lib-core.input")
local state   = require("src.state")
local actions = require("src.actions")
local ui      = require("src.ui")

-- =====================================================================
-- Setup
-- =====================================================================
local WORK_PATH = "maps/work.map.json"
local work_map_id = maps.load(WORK_PATH)
maps.set_current(work_map_id)
maps.load_textures(engine.module.asset_aliases())
state.set_map(work_map_id, WORK_PATH)

-- Center camera on the map
local m_size = maps.size()
local t_size = maps.tile_size()
camera.set_target((m_size.w * t_size) / 2, (m_size.h * t_size) / 2)
camera.set_zoom(1.0)

-- =====================================================================
-- Input bindings
-- =====================================================================
input.bind("quit",      { "escape" })
input.bind("erase",     { "e" })
input.bind("rotate",    { "r" })
input.bind("save_map",  { "s" })

engine.print("map-editor: ready. Hotkeys: E=erase, R=rotate, S=save, ESC=quit")

-- =====================================================================
-- Frame hooks
-- =====================================================================
function update(ctx, dt)
    -- Quit
    if input.was_action_pressed("quit") then
        engine.exit()
        return
    end

    -- Update mouse-cell tracking for status chip
    local mx, my = engine.input.get_mouse_pos()
    local wx, wy = camera.screen_to_world(mx, my)
    local cell_x = math.floor(wx / t_size)
    local cell_y = math.floor(wy / t_size)
    if cell_x >= 0 and cell_y >= 0 and cell_x < m_size.w and cell_y < m_size.h then
        state.set_mouse_cell(cell_x, cell_y)
    else
        state.set_mouse_cell(nil)
    end

    -- Hotkey: rotate
    if input.was_action_pressed("rotate") then
        actions.cycle_rotation()
    end

    -- Hotkey: save
    if input.was_action_pressed("save_map") then
        actions.save()
    end

    -- Hotkey: erase (uses current mouse-hover cell)
    if input.was_action_pressed("erase") then
        local cell = state.get_mouse_cell()
        if cell then actions.erase_cell_at(cell.x, cell.y) end
    end

    -- Mouse clicks: hit-test UI first, then map area
    if engine.input.was_mouse_pressed(engine.input.MOUSE_LEFT) then
        local consumed = ui.handle_click(mx, my, "left")
        if not consumed and state.get_mouse_cell() then
            local cell = state.get_mouse_cell()
            actions.paint_cell_at(cell.x, cell.y)
        end
    end
    if engine.input.was_mouse_pressed(engine.input.MOUSE_RIGHT) then
        ui.handle_click(mx, my, "right")
    end

    camera.update(dt)
end

function draw()
    maps.draw_map()
    ui.draw()
end