-- =====================================================================
-- content/stone_age.lua — T1-modder content pack: Stone-Age items + recipes.
--
-- PURE CONTENT. No engine wiring, no sprite/atlas plumbing — just the
-- authoring API `c` passed in by the module (see init.lua's content facade):
--   c.T{ id, name, desc, weight, vol, material={...}, affordance={...},
--        atlas="tc"|"stone", uv="<sprite-key>", scale? }   -- define an item
--   c.R{ ...crafting.define_recipe def... }                -- define a recipe
--   c.S{ template, x, y }                                  -- place item in world
-- `c.T` auto-registers the crafting-panel icon from the item's own sprite.
--
-- A T1 modder adds Stone-Age content by editing THIS file only — never
-- init.lua. Drop a sibling `content/<name>.lua` + list it in init.lua's
-- CONTENT_PACKS to add a new pack.
--
-- Self-bootstrapping graph:
--     rock --knap--> sharp_stone --+--(tool)--> saw_planks (log -> 4 planks)
--                                  +--(head)--> stone_axe
--     plant_fiber x3 --twist--> cordage --(binding)--> stone_axe
--     stick --------------------------(haft)--------> stone_axe
-- =====================================================================
return function(c)
    -- ---- items -------------------------------------------------------
    -- World-gathered
    c.T{ id = "log", name = "Log",
         desc = "A heavy wooden log. Saw it into planks with a cutting edge.",
         weight = 20, vol = 0.05, material = { wood = 1.0 },
         atlas = "tc", uv = "log_pile1" }

    c.T{ id = "sharp_stone", name = "Sharp Stone",
         desc = "A knapped stone with a cutting edge. A tool — not consumed by sawing.",
         weight = 1, vol = 0.0004, material = { stone = 1.0 },
         affordance = { cutting = true }, atlas = "tc", uv = "spade" }

    c.T{ id = "plant_fiber", name = "Plant Fiber",
         desc = "A strand of tough plant fiber. Twist three into cordage.",
         weight = 0.05, vol = 0.0002, material = { fiber = 1.0 },
         atlas = "tc", uv = "sack1", scale = 0.6 }

    -- Crafted outputs
    c.T{ id = "plank", name = "Plank",
         desc = "A sawn wooden plank.",
         weight = 2, vol = 0.004, material = { wood = 1.0 },   -- light: not re-sawable (<5)
         atlas = "tc", uv = "bench1" }

    c.T{ id = "cordage", name = "Cordage",
         desc = "A length of twisted plant-fiber cord.",
         weight = 0.1, vol = 0.0003, material = { fiber = 1.0 },
         atlas = "tc", uv = "sack1" }

    c.T{ id = "stone_axe", name = "Stone Axe",
         desc = "A hafted stone axe. Chops wood.",
         weight = 1.8, vol = 0.0012,
         material = { stone = 0.6, wood = 0.3, fiber = 0.1 },
         affordance = { chopping = true }, atlas = "tc", uv = "spade" }

    -- ---- recipes -----------------------------------------------------
    -- saw_planks: input matched by MATERIAL (mostly wood AND heavy), a light
    -- plank fails weight>5. Needs a cutting TOOL (not consumed). ×4 output.
    c.R{ id = "saw_planks",
         inputs  = { { match = { ["composition.wood"] = ">0.5", weight = ">5" }, count = 1 } },
         tools   = { { match = { ["affordance.cutting"] = true } } },
         outputs = { { template = "plank", count = 4 } },
         name = "Saw Planks",
         description = "Saw a wooden log into four planks (needs a cutting edge)." }

    c.R{ id = "knap_sharp_stone",
         inputs  = { { template = "rock", count = 1 } },
         outputs = { { template = "sharp_stone", count = 1 } },
         name = "Knap Sharp Stone",
         description = "Strike a rock to flake off a sharp-edged stone." }

    c.R{ id = "twist_cordage",
         inputs  = { { template = "plant_fiber", count = 3 } },
         outputs = { { template = "cordage", count = 1 } },
         name = "Twist Cordage",
         description = "Twist three plant fibers into a length of cordage." }

    c.R{ id = "craft_stone_axe",
         inputs = {
             { template = "sharp_stone", count = 1 },   -- head (consumed)
             { template = "stick",       count = 1 },   -- haft
             { template = "cordage",     count = 1 },   -- binding
         },
         outputs = { { template = "stone_axe", count = 1 } },
         name = "Haft Stone Axe",
         description = "Bind a sharp stone to a stick with cordage." }

    -- ---- world spawns (backpack sits at 350,400) ---------------------
    c.S{ template = "log",         x = 110, y = 400 }
    c.S{ template = "sharp_stone", x = 110, y = 330 }
    for i = 1, 3 do
        c.S{ template = "plant_fiber", x = 50, y = 300 + (i - 1) * 28 }
    end
end