-- =====================================================================
-- content/stone_age.lua — T1-modder content pack: Stone-Age items + recipes.
--
-- PURE CONTENT via the authoring API `c` (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
--
-- ROLE-BASED RECIPES (the intent): a recipe slot asks for the CAPABILITY it
-- needs, and ANY item that offers that capability qualifies — not a specific
-- item id. Capabilities are expressed as property-constraints (crafting v0.3 /
-- ADR-0055 + its 2026-07-31 amendment). Two orthogonal axes carry a recipe:
--   * `affordance.*` — what an item OFFERS / can DO / what role it fills:
--                      cutting / hammering / chopping / leverage / binding /
--                      spinnable / knappable / piercing …  (open vocabulary)
--   * `composition.*`— material makeup (wood / stone / fiber …)
--   * `weight`       — mass discriminator (light stick vs heavy branch)
-- e.g. a "haft" = { ["affordance.leverage"]=true } → any stick OR branch OR
-- pole works. The SAME affordance vocabulary is required by both consumed
-- `inputs` and non-consumed `tools`; the inputs/tools split (not a separate
-- axis) says whether the item is used up.
--
-- `form` was RETIRED (ADR-0055 amendment): a physical-shape axis mixed
-- geometry, identity and capability. Its functional members became
-- affordances; its identity members (a "tree") stay template-id.
--
-- Template-id matching ({ template="tree" }) is ALSO valid — it is just the
-- trivial one-property constraint — and is used where a recipe genuinely wants
-- one specific item (see rock_pick/rock_pile in init.lua, and chop_tree below).
-- Role-based is the default; template-id is one of the options, not the norm.
-- =====================================================================
return function(c)
    -- ---- items (each tagged with the CAPABILITIES it offers) ---------
    -- NOTE: `rock` (affordance.knappable) and `stick` (affordance.leverage,
    -- weight 0.3) are BASE items defined in init.lua; this pack's role-based
    -- recipes match them by affordance the same as pack items.
    -- World-gathered
    c.T{ id = "branch", name = "Branch", desc = "A heavy springy branch. Snap it into sticks.",
         weight = 1.5, vol = 0.006, material = { wood = 1.0 },
         affordance = { leverage = true },          -- a haft candidate, but heavy
         atlas = "tc", uv = "log_pile1", scale = 0.85 }

    c.T{ id = "log", name = "Log", desc = "A heavy wooden log. Saw it into planks.",
         weight = 20, vol = 0.05, material = { wood = 1.0 },  -- raw heavy wood; matched by material+weight
         atlas = "tc", uv = "log_pile1" }

    c.T{ id = "tree", name = "Tree", desc = "A standing tree. Chop it down for logs.",
         weight = 400, vol = 1.0, material = { wood = 1.0 },  -- one concrete item → matched by template-id
         atlas = "tc", uv = "log_pile1", scale = 1.6 }

    c.T{ id = "plant_fiber", name = "Plant Fiber", desc = "Tough plant fiber. Twist several into cordage.",
         weight = 0.05, vol = 0.0002, material = { fiber = 1.0 },
         affordance = { spinnable = true },         -- can be twisted; cord itself is NOT spinnable
         atlas = "tc", uv = "sack1", scale = 0.6 }

    -- Crafted
    c.T{ id = "sharp_stone", name = "Sharp Stone", desc = "A knapped stone with a cutting edge.",
         weight = 1, vol = 0.0004, material = { stone = 1.0 },
         affordance = { cutting = true },           -- "blade" role = affords cutting
         atlas = "tc", uv = "spade" }

    c.T{ id = "cordage", name = "Cordage", desc = "Twisted plant-fiber cord. A binding.",
         weight = 0.1, vol = 0.0003, material = { fiber = 1.0 },
         affordance = { binding = true },           -- "cord" role = affords binding (NOT spinnable → no re-twist)
         atlas = "tc", uv = "sack1" }

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

    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" }

    c.T{ id = "stone_hammer", name = "Stone Hammer", desc = "A stone lashed to a haft. Pounds and knaps.",
         weight = 1.5, vol = 0.001,
         material = { stone = 0.6, wood = 0.3, fiber = 0.1 },
         affordance = { hammering = true }, atlas = "tc", uv = "spade" }

    c.T{ id = "sharpened_stick", name = "Sharpened Stick", desc = "A stick whittled to a point. A crude spear.",
         weight = 0.3, vol = 0.0005, material = { wood = 1.0 },
         affordance = { piercing = true }, atlas = "tc", uv = "log_pile1", scale = 0.9 }

    -- ---- recipes (match by CAPABILITY, not by item id) --------------
    -- knap: any KNAPPABLE stone + a HAMMERING tool -> a cutting edge.
    -- (rock is knappable; sharp_stone is NOT → no self-recursion.)
    c.R{ id = "knap_sharp_stone",
         inputs  = { { match = { ["affordance.knappable"] = true }, count = 1 } },
         tools   = { { match = { ["affordance.hammering"] = true } } },
         outputs = { { template = "sharp_stone", count = 1 } },
         name = "Knap Sharp Stone",
         description = "Strike a stone with a hammerstone to flake off a sharp edge." }

    -- cordage: three SPINNABLE fibers (any fiber source) -> cord.
    -- (cordage is binding-but-not-spinnable → you can't re-twist cord.)
    c.R{ id = "twist_cordage",
         inputs  = { { match = { ["affordance.spinnable"] = true }, count = 3 } },
         outputs = { { template = "cordage", count = 1 } },
         name = "Twist Cordage",
         description = "Twist three plant fibers into a length of cordage." }

    -- hammer: a heavy STONE head + a LEVERAGE haft + a BINDING.
    -- head matched the primitive way (material+mass); haft/binding by affordance —
    -- one recipe, both matching styles, one mechanism (ADR-0055).
    c.R{ id = "craft_stone_hammer",
         inputs = {
             { match = { ["composition.stone"] = ">0.5", weight = ">1" }, count = 1 },  -- head (a stone chunk)
             { match = { ["affordance.leverage"] = true },               count = 1 },  -- haft (stick OR branch)
             { match = { ["affordance.binding"]  = true },               count = 1 },  -- binding
         },
         outputs = { { template = "stone_hammer", count = 1 } },
         name = "Haft Stone Hammer",
         description = "Lash a stone to a haft for a pounding tool (enables knapping)." }

    -- axe: a CUTTING head + a LEVERAGE haft + a BINDING.
    c.R{ id = "craft_stone_axe",
         inputs = {
             { match = { ["affordance.cutting"]  = true }, count = 1 },  -- head (a sharp stone)
             { match = { ["affordance.leverage"] = true }, count = 1 },  -- haft
             { match = { ["affordance.binding"]  = true }, count = 1 },  -- binding
         },
         outputs = { { template = "stone_axe", count = 1 } },
         name = "Haft Stone Axe",
         description = "Bind a sharp stone to a haft with cordage." }

    -- break: a HEAVY leverage-thing (branch, not a light stick) -> two sticks.
    c.R{ id = "break_branch",
         inputs  = { { match = { ["affordance.leverage"] = true, weight = ">1" }, count = 1 } },
         outputs = { { template = "stick", count = 2 } },
         name = "Break Branch",
         description = "Snap a heavy branch over your knee into two sticks." }

    -- sharpen: a LIGHT leverage-thing (a stick) + a CUTTING tool -> pointed stick.
    c.R{ id = "sharpen_stick",
         inputs  = { { match = { ["affordance.leverage"] = true, weight = "<1" }, count = 1 } },
         tools   = { { match = { ["affordance.cutting"] = true } } },
         outputs = { { template = "sharpened_stick", count = 1 } },
         name = "Sharpen Stick",
         description = "Whittle a stick to a point with a cutting edge." }

    -- chop: THE tree (genuine single item → template-id) + a CHOPPING tool -> logs.
    -- (Multiple tree species would switch this to an affordance/material match.)
    c.R{ id = "chop_tree",
         inputs  = { { match = { template = "tree" }, count = 1 } },
         tools   = { { match = { ["affordance.chopping"] = true } } },
         outputs = { { template = "log", count = 2 } },
         name = "Chop Tree",
         description = "Fell a tree with a chopping edge — yields two logs." }

    -- saw: any heavy WOOD (matched by material+mass) + a CUTTING tool -> planks.
    -- A light plank (weight 2) is correctly not re-sawable.
    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 heavy wooden log into four planks (needs a cutting edge)." }

    -- ---- 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
    c.S{ template = "branch", x = 50,  y = 250 }
    c.S{ template = "branch", x = 85,  y = 250 }
    c.S{ template = "tree",   x = 200, y = 190 }
end