-- =====================================================================
-- 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, form=, 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 ROLE it needs,
-- and ANY item that fills that role qualifies — not a specific item id. Roles
-- are expressed as property-constraints (crafting v0.3 / ADR-0055):
--   * `form`         — physical role: shaft / cord / fiber / lump / blade / …
--   * `composition.*`— material makeup (wood / stone / fiber …)
--   * `weight`       — size discriminator (light stick vs heavy branch)
--   * `affordance.*` — functional capability of a TOOL (cutting/hammering/…)
-- e.g. a "haft" = { form="shaft" } → any stick OR branch OR pole works.
--
-- Template-id matching ({ template="rock" }) 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). Role-based is the
-- default here; template-id is one of the options, not the norm.
-- =====================================================================
return function(c)
    -- ---- items (each tagged with its ROLE via `form`) ----------------
    -- NOTE: `rock` (form=lump) and `stick` (form=shaft) are BASE items defined
    -- in init.lua; this pack's role-based recipes match them by form.
    -- World-gathered
    c.T{ id = "branch", name = "Branch", desc = "A heavy springy branch. Snap it into sticks.",
         weight = 1.5, vol = 0.006, form = "shaft", material = { wood = 1.0 },
         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, form = "log", material = { wood = 1.0 },
         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, form = "tree", material = { wood = 1.0 },
         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, form = "fiber", material = { fiber = 1.0 },
         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, form = "blade", material = { stone = 1.0 },
         affordance = { cutting = true }, atlas = "tc", uv = "spade" }

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

    c.T{ id = "plank", name = "Plank", desc = "A sawn wooden plank.",
         weight = 2, vol = 0.004, form = "plank", material = { wood = 1.0 },
         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, form = "tool",
         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, form = "tool",
         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, form = "shaft", material = { wood = 1.0 },
         affordance = { piercing = true }, atlas = "tc", uv = "log_pile1", scale = 0.9 }

    -- ---- recipes (match by ROLE, not by item id) --------------------
    -- knap: any hard stone LUMP + a HAMMERING tool -> a sharp blade.
    c.R{ id = "knap_sharp_stone",
         inputs  = { { match = { form = "lump" }, 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 FIBERS (any fiber source) -> cord.
    c.R{ id = "twist_cordage",
         inputs  = { { match = { form = "fiber" }, count = 3 } },
         outputs = { { template = "cordage", count = 1 } },
         name = "Twist Cordage",
         description = "Twist three plant fibers into a length of cordage." }

    -- hammer: a LUMP head + a SHAFT haft + a CORD binding.
    c.R{ id = "craft_stone_hammer",
         inputs = {
             { match = { form = "lump" },  count = 1 },   -- head
             { match = { form = "shaft" }, count = 1 },   -- haft (stick OR branch)
             { match = { form = "cord" },  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 BLADE head + a SHAFT haft + a CORD binding.
    c.R{ id = "craft_stone_axe",
         inputs = {
             { match = { form = "blade" }, count = 1 },   -- head (a sharp stone)
             { match = { form = "shaft" }, count = 1 },   -- haft
             { match = { form = "cord" },  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 shaft (branch, not a light stick) -> two sticks.
    c.R{ id = "break_branch",
         inputs  = { { match = { form = "shaft", 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 shaft (a stick) + a CUTTING tool -> a pointed stick.
    c.R{ id = "sharpen_stick",
         inputs  = { { match = { form = "shaft", 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: a TREE + a CHOPPING tool -> two logs (closes axe->log->plank).
    c.R{ id = "chop_tree",
         inputs  = { { match = { form = "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+weight, not form) + a CUTTING
    -- tool -> four 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