package terrain

import rl "vendor:raylib"
import rlgl "vendor:raylib/rlgl"
import "core:math"
import "core:math/rand"
import "core:fmt"

Vec2  :: [2]f32
Vec3  :: [3]f32
Rect  :: rl.Rectangle
Img   :: rl.Image
Tex   :: rl.Texture
Key   :: rl.KeyboardKey
Color :: rl.Color

SCREEN_WIDTH : i32 = 1600
SCREEN_HEIGHT : i32 = 1000
BW := f32(SCREEN_WIDTH)
BH := f32(SCREEN_HEIGHT)

points :[]Vec3

GameState :: struct {
    dt:      f32,
    keymap:  map[string]Key,
    cam: rl.Camera3D,
}

init_state :: proc() -> ^GameState {
    keymap := make(map[string]Key)
    keymap["Left"] = .A
    keymap["Right"] = .D
    keymap["Up"] = .W
    keymap["Down"] = .S

    state := GameState {
        keymap = keymap,
        cam = {
            position = { 35.0, 35.0, 35.0 },
            target = { 0.0, -5.0, 0.0 },
            up = { 0.0, 1.0, 0.0 },
            fovy = 15.0,
            projection = rl.CameraProjection.PERSPECTIVE,
        },
    }
    rlgl.EnableWireMode()
    // rows := 1
    // cols := 50
    // for r in 0..<rows {
    //     for c in 0..<cols {
    //         row := c % 2 == 0 ? c : c + 1
    //         points[c + r * cols] = {}
    //     }
    // }
    points = {
        {0,0,0},{0,0,1},
        {1,0,0},{1,0,0},{1,0,1},
        {2,0,0},{2,0,1},
        {3,0,0},{3,0,1},
        {4,0,0},{4,0,1},
        {5,0,0},{5,0,1},
    }
    cloned := new_clone(state)
    return cloned
}

get_rand_angle :: proc(min: i32, max: i32) -> f32 { return f32(rl.GetRandomValue(min, max)) * rl.DEG2RAD }

player_input :: proc(using s: ^GameState) {
    horizontal: f32
    vertical: f32
    if rl.IsKeyDown(s.keymap["Right"]) { horizontal =  1 }
    if rl.IsKeyDown(s.keymap["Left"]) { horizontal = -1 }
    if rl.IsKeyDown(s.keymap["Up"]) { vertical   = -1 }
    if rl.IsKeyDown(s.keymap["Down"]) { vertical   =  1 }
    if rl.IsMouseButtonPressed(rl.MouseButton.LEFT) {
    }
}

update :: proc(using s: ^GameState) {
}

draw :: proc(using s: ^GameState) {

    rl.DrawTriangleStrip3D(raw_data(points), 6, rl.BLACK)
}

main :: proc() {
    rl.SetTraceLogLevel(.ERROR)
    rl.InitWindow(SCREEN_WIDTH, SCREEN_HEIGHT, "Boids")
    rl.SetTargetFPS(60)

    state := init_state()
    defer {
        free(state)   
    }

    for !rl.WindowShouldClose() {
        state.dt = rl.GetFrameTime()

        player_input(state)

        update(state)

        rl.BeginDrawing()
        rl.ClearBackground(rl.WHITE)

        rl.BeginMode3D(state.cam)
            draw(state)
        rl.EndMode3D()

        rl.EndDrawing()
    }

    rl.CloseWindow()
}